Datasheet
ICL3225, ICL3245
1µA, +3V to +5.5V, 1Mbps, RS-232 Transceivers with Enhanced Automatic
Powerdown
The ICL3225 and ICL3245 are 3.0V to 5.5V powered
RS-232 transmitters/receivers that meet ElA/TIA-232
and V.28/V.24 specifications, even at VCC = 3.0V.
Targeted applications are PDAs, Palmtops, and
notebook and laptop computers where the low
operational power consumption and even lower
standby power consumption is critical. Efficient
on-chip charge pumps coupled with manual and
enhanced automatic powerdown functions reduce the
standby supply current to a 1µA trickle. Small footprint
packaging and the use of small, low value capacitors
ensure board space savings. Data rates greater than
1Mbps are ensured at worst case load conditions.
The ICL3225 and ICL3245 are fully compatible with
3.3V only systems, mixed 3.3V and 5.0V systems,
and 5.0V only systems.
The ICL3245 is a 3-driver, 5-receiver device that
provides a complete serial port suitable for laptop or
notebook computers. It also includes a noninverting
always-active receiver for “wake-up” capability.
The ICL3225 and ICL3245 feature an enhanced
automatic powerdown function that powers down the
on-chip power-supply and driver circuits. Automatic
powerdown occurs when all receiver and transmitter
inputs detect no signal transitions for a period of 30s.
The ICL3225 and ICL3245 automatically power back
up whenever they sense a transition on any
transmitter or receiver input.
Table 1 summarizes the features of the device
represented by this datasheet. Application Note
AN9863 summarizes the features of each device in
the ICL32xx 3V family.
Features
• Pb-free (RoHS compliant)
• ±15kV ESD protected (Human Body Model)
• Manual and enhanced automatic powerdown
features
• Drop in replacements for MAX3225, MAX3245
• Meets EIA/TIA-232 and V.28/V.24 specifications
at 3V
• Latch-up free
• On-chip voltage converters require only
four external 0.1µF capacitors
• Guaranteed mouse driveability (ICL3245)
• “Ready to Transmit” indicator output (ICL3225)
• Receiver hysteresis for improved noise immunity
• Ensured minimum data rate: 1Mbps
• Low skew at transmitter/receiver input trip
points: 10ns
• Ensured minimum slew rate: 24V/µs
• Wide power supply range: Single +3V to +5.5V
• Low supply current in powerdown state: 1µA
Applications
• Any system requiring RS-232 communication ports
○ Battery powered, hand-held, and portable
equipment
○ Laptop computers, notebooks, palmtops
○ Modems, printers, and other peripherals
Related Literature
○ Digital cameras
For a full list of related documents, visit our website:
○ Cellular/mobile phones
• ICL3225, ICL3245 device pages
Table 1.
Summary of Features
Part Number
No. of
Tx.
No. of
Rx.
No. Of Monitor
Rx. (ROUTB)
Data Rate
(kbps)
Rx. Enable
Function?
Ready
Output?
ICL3225
2
2
0
1000
No
Yes
Yes
Yes
ICL3245
3
5
1
1000
No
No
Yes
Yes
FN4878 Rev.10.00
May.29.19
Manual
Enhanced Automatic
Powerdown? Powerdown Function?
Page 1 of 24
ICL3225, ICL3245
Contents
1.
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
1.2
1.3
1.4
2.
Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4
5
5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
2.2
2.3
2.4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
6
7
3.
Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1
4.1.1
4.2
4.3
4.4
4.5
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
Charge Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Pump Abs Max Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerdown Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Controlled (Manual) Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INVALID Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enhanced Automatic Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emulating Standard Automatic Powerdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hybrid Automatic Powerdown Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
READY Output (ICL3225 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Outputs when Exiting Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse Driveability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
11
12
14
14
14
15
15
16
17
17
17
18
18
18
19
19
5.
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.
Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FN4878 Rev.10.00
May.29.19
Page 2 of 24
ICL3225, ICL3245
1.
1.1
1. Overview
Overview
Typical Operating Circuits
ICL3225
+3.3V
0.1µF
C1
0.1µF
2
+
4
C2
0.1µF
5
+
6
T1IN
T2IN
TTL/CMOS
Logic Levels
+
R1OUT
R2OUT
C1+
19
VCC
C1C2+
C2-
3
+ C3
0.1µF
V- 7
C4
0.1µF
+
V+
T1
13
17
T2
12
8
15
16
R1
5kΩ
R2
5kΩ
10
1
14
9
READY
FORCEOFF
INVALID
FORCEON
20
11
T1OUT
T2OUT
R1IN
RS-232
Levels
R2IN
VCC
To Power
Control Logic
GND
18
FN4878 Rev.10.00
May.29.19
Page 3 of 24
ICL3225, ICL3245
1. Overview
ICL3245
+3.3V
+
26
0.1µF
C1
0.1µF
C2
0.1µF
T1IN
T2IN
28
+
C1+
27
VCC
V+
24
C11
C2+
+
2
C2-
VT1
14
9
T2
13
10
T3
12
3
+
C3
0.1µF
C4
0.1µF
+
T1OUT
T2OUT
RS-232
Levels
11
T3IN
T3OUT
20
R2OUTB
TTL/CMOS
Logic Levels
19
4
R1OUT
R1IN
R1
R2OUT
5kΩ
18
5
R2
5kΩ
17
6
R3OUT
R3IN
R3
R4OUT
5kΩ
16
7
R4
R5OUT
To Power
Control Logic
22
21
RS-232
Levels
R4IN
5kΩ
15
23
VCC
R2IN
8
5kΩ
R5
R5IN
FORCEON
FORCEOFF
INVALID
GND
25
1.2
Ordering Information
Part Number (Notes 2, 3)
Part Marking
Temp.
Range (°C)
Tape and Reel
(Units) (Note 1)
Package (RoHS Compliant)
Pkg. Dwg. #
ICL3225CAZ No longer
available or supported,
recommended replacement:
ICL3225ECAZ
ICL32 25CAZ
0 to +70
-
20 Ld SSOP
M20.209
ICL3225CAZ-T No longer
available or supported,
recommended replacement:
ICL3225ECAZ-T
ICL32 25CAZ
0 to +70
1k
20 Ld SSOP
M20.209
ICL3225IAZ No longer
available or supported,
recommended replacement:
ICL3225EIAZ
ICL32 25IAZ
-40 to +85
-
20 Ld SSOP
M20.209
ICL3225IAZ-T No longer
available or supported,
recommended replacement:
ICL3225EIAZ-T
ICL32 25IAZ
-40 to +85
1k
20 Ld SSOP
M20.209
FN4878 Rev.10.00
May.29.19
Page 4 of 24
ICL3225, ICL3245
1. Overview
Part Number (Notes 2, 3)
Part Marking
Temp.
Range (°C)
Tape and Reel
(Units) (Note 1)
Package (RoHS Compliant)
Pkg. Dwg. #
ICL3245CAZ
ICL 3245CAZ
0 to +70
-
28 Ld SSOP
M28.209
ICL3245CAZ-T
ICL 3245CAZ
0 to +70
1k
28 Ld SSOP
M28.209
Notes:
1. See TB347 for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and matte tin
plate termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), see the ICL3225 and ICL3225 device pages. For more information about MSL, see TB363.
1.3
Pinouts
ICL3225 (20 Ld SSOP)
Top View
READY 1
C1+ 2
V+
3
C1- 4
C2+ 5
C2- 6
20 FORCEOFF
C2+ 1
28 C1+
19 VCC
C2- 2
27 V+
V-
3
26 VCC
17 T1OUT
R1IN
4
25 GND
16 R1IN
R2IN
5
24 C1-
15 R1OUT
R3IN
6
23 FORCEON
18 GND
V-
7
14 FORCEON
R4IN
7
22 FORCEOFF
T2OUT
8
13 T1IN
R5IN
8
21 INVALID
9
12 T2IN
T1OUT
9
20 R2OUTB
11 INVALID
T2OUT 10
19 R1OUT
T3OUT 11
18 R2OUT
T3IN 12
17 R3OUT
T2IN 13
16 R4OUT
T1IN 14
15 R5OUT
R2IN
R2OUT 10
1.4
ICL3245 (28 Ld SSOP)
Top View
Pin Descriptions
Pin
Function
VCC
System power supply input (3.0V to 5.5V).
V+
Internally generated positive transmitter supply (+5.5V).
V-
Internally generated negative transmitter supply (-5.5V).
GND
Ground connection.
C1+
External capacitor (voltage doubler) is connected to this lead.
C1-
External capacitor (voltage doubler) is connected to this lead.
C2+
External capacitor (voltage inverter) is connected to this lead.
C2-
External capacitor (voltage inverter) is connected to this lead.
TIN
TTL/CMOS compatible transmitter Inputs.
TOUT
RS-232 level (nominally ±5.5V) transmitter outputs.
RIN
RS-232 compatible receiver inputs.
ROUT
TTL/CMOS level receiver outputs.
ROUTB
TTL/CMOS level, noninverting, always enabled receiver outputs.
INVALID
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
READY
Active high output that indicates when the ICL32xxE is ready to transmit (V- ≤ -4V)
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON
(see Table 5 on page 12).
FORCEON
Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
FN4878 Rev.10.00
May.29.19
Page 5 of 24
ICL3225, ICL3245
2.
2. Specifications
Specifications
2.1
Absolute Maximum Ratings
Minimum
Maximum
Unit
VCC to GND
Parameter
-0.3
+6
V
V+ to GND
-0.3
+7
V
V- to GND
+0.3
-7
V
+14
V
+6
V
±25
V
±13.2
V
VCC + 0.3
V
V+ to VInput Voltages
TIN, FORCEOFF, FORCEON
-0.3
RIN
Output Voltages
TOUT
ROUT, INVALID, READY
-0.3
Short-Circuit Duration
Continuous
TOUT
ESD Rating
See ESD Rating
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions can adversely
impact product reliability and result in failures not covered by warranty.
2.2
Thermal Information
Thermal Resistance (Typical) (Note 4)
θJA (°C/W)
20 Ld SSOP Package
135
28 Ld SSOP Package
100
Note:
4. θJA is measured with the component mounted on a low-effective thermal conductivity test board in free air. See TB379 for details.
Parameter
Minimum
Maximum Junction Temperature (Plastic Package)
Maximum Storage Temperature Range
-65
Pb-Free Reflow Profile
2.3
Maximum
Unit
+150
°C
+150
°C
see TB493
Recommended Operating Conditions
Parameter
Minimum
Maximum
Unit
ICL32xxC
0
+70
°C
ICL32xxI
-40
+85
°C
Temperature Range
FN4878 Rev.10.00
May.29.19
Page 6 of 24
ICL3225, ICL3245
2.4
2. Specifications
Electrical Specifications
Test conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1µF; unless otherwise specified. Typicals are at TA = 25°C
Parameter
Test Conditions
Temp (°C)
Min
Typ
Max
Unit
DC Characteristics
Supply Current, Automatic
Powerdown
All RIN open, FORCEON = GND, FORCEOFF = VCC
25
-
1.0
10
µA
Supply Current, Powerdown
FORCEOFF = GND
25
-
1.0
10
µA
Supply Current,
Automatic Powerdown Disabled
All outputs unloaded,
FORCEON = FORCEOFF
= VCC
ICL3245, VCC = 3.0V
25
-
0.3
1.0
mA
ICL322x, VCC = 3.15V
25
-
0.3
1.0
mA
Logic and Transmitter Inputs And Receiver Outputs
Input Logic Threshold Low
TIN, FORCEON, FORCEOFF
Full
-
-
0.8
V
Input Logic Threshold High
TIN, FORCEON, FORCEOFF VCC = 3.3V
Full
2.0
-
-
V
VCC = 5.0V
Full
2.4
-
-
V
25
-
0.5
-
V
Transmitter Input Hysteresis
Input Leakage Current
TIN, FORCEON, FORCEOFF
Full
-
±0.01
±1.0
µA
Output Leakage Current
FORCEOFF = GND
Full
-
±0.05
±10
µA
Output Voltage Low
IOUT = 1.6mA
Full
-
-
0.4
V
Output Voltage High
IOUT = -1.0mA
Full
-
V
VCC - 0.6 VCC - 0.1
Receiver Inputs
Input Voltage Range
Full
-25
-
25
V
VCC = 3.3V
25
0.6
1.2
-
V
VCC = 5.0V
25
0.8
1.5
-
V
VCC = 3.3V
25
-
1.5
2.4
V
VCC = 5.0V
25
-
1.8
2.4
V
Input Hysteresis
25
-
0.5
-
V
Input Resistance
25
3
5
7
kΩ
Input Threshold Low
Input Threshold High
Transmitter Outputs
Output Voltage Swing
All transmitter outputs loaded with 3kΩ to ground
Full
±5.0
±5.4
-
V
Output Resistance
VCC = V+ = V- = 0V, transmitter output = ±2V
Full
300
10M
-
W
Full
-
±35
±60
mA
VOUT = ±12V, VCC = 0V or 3V to 5.5V
automatic powerdown or FORCEOFF = GND
Full
-
-
±25
µA
T1IN = T2IN = GND, T3IN = VCC, T3OUT loaded with
3kΩ to GND, T1OUT and T2OUT loaded with 2.5mA each
Full
5
-
-
V
Output Short-Circuit Current
Output Leakage Current
Mouse Driveability
Transmitter Output Voltage
(See Figure 16)
Enhanced Automatic Powerdown (FORCEON = GND, FORCEOFF = VCC)
Receiver Input Thresholds to
INVALID High
See Figure 11
Full
-2.7
-
2.7
V
Receiver Input Thresholds to
INVALID Low
See Figure 11
Full
-0.3
-
0.3
V
INVALID, READY Output
Voltage Low
IOUT = 1.6mA
Full
-
-
0.4
V
INVALID, READY Output
Voltage High
IOUT = -1.0mA
Full
VCC - 0.6
-
-
V
FN4878 Rev.10.00
May.29.19
Page 7 of 24
ICL3225, ICL3245
2. Specifications
Test conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1µF; unless otherwise specified. Typicals are at TA = 25°C (Continued)
Parameter
Test Conditions
Temp (°C)
Min
Typ
Max
Unit
Receiver Positive or Negative
Threshold to INVALID High
Delay (tINVH)
25
-
1
-
µs
Receiver Positive or Negative
Threshold to INVALID Low Delay
(tINVL)
25
-
30
-
µs
Receiver or Transmitter Edge to
Transmitters Enabled Delay
(tWU)
Note 5
25
-
100
-
µs
Receiver or Transmitter Edge to
Transmitters Disabled Delay
(tAUTOPWDN)
Note 5
Full
15
30
60
sec
CL = 1000pF
Full
250
-
-
kbps
VCC = 3V to 4.5V,
CL = 250pF
Full
1000
-
-
kbps
VCC = 4.5V to 5.5V,
CL = 1000pF
Full
1000
-
-
kbps
tPHL
25
-
0.15
-
µs
tPLH
25
-
0.15
-
µs
Timing Characteristics
Maximum Data Rate
Receiver Propagation Delay
RL = 3kΩone transmitter
switching
Receiver input to receiver
output, CL = 150pF
Receiver Output Enable Time
Normal operation
25
-
200
-
ns
Receiver Output Disable Time
Normal operation
25
-
200
-
ns
Transmitter Skew
tPHL - tPLH (Note 6)
25
-
25
-
ns
Receiver Skew
tPHL - tPLH (Note 6)
25
-
50
-
ns
Transition Region Slew Rate
VCC = 3.3V, RL = 3kΩto 7kΩmeasured from 3V to -3V
or -3V to 3V, CL = 150pF to 1000pF
25
24
-
150
V/µs
Human Body Model
25
-
±15
-
kV
IEC61000-4-2 Contact Discharge
25
-
±8
-
kV
IEC61000-4-2 Air Gap Discharge
25
-
>±8
-
kV
Human Body Model
25
-
±2.5
-
kV
ESD Performance
RS-232 Pins (TOUT, RIN)
All Other Pins
Notes:
5. An “edge” is defined as a transition through the transmitter or receiver input thresholds.
6. Skews are measured at the receiver input switching points (1.4V).
FN4878 Rev.10.00
May.29.19
Page 8 of 24
ICL3225, ICL3245
3.
3. Typical Performance Curves
Typical Performance Curves
6
110
90
VOUT+
+Slew
2
70
Slew Rate (V/µs)
Transmitter Output Voltage (V)
4
1 Transmitter at 1Mbps
Other Transmitters at 30kbps
0
-2
VOUT -
50
-Slew
30
-4
10
-6
0
1000
2000
3000
4000
0
5000
0
1000
Load Capacitance (pF)
2000
3000
4000
5000
Load Capacitance (pF)
Figure 1. Transmitter Output Voltage vs Load
Capacitance
Figure 2. Slew Rate vs Load Capacitance
90
90
ICL3225
1Mbps
ICL3245
80
80
1Mbps
70
Supply Current (mA)
Supply Current (mA)
70
60
50
40
250kbps
30
120kbps
20
10
60
50
250kbps
40
30
120kbps
20
0
1000
2000
3000
4000
10
0
5000
2000
1000
3000
4000
5000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 3. Supply Current vs Load Capacitance When
Transmitting Data
Figure 4. Supply Current vs Load Capacitance When
Transmitting Data
3.5
No Load
All Outputs Static
3.0
Supply Current (mA)
2.5
2.0
1.5
1.0
0.5
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Supply Voltage (V)
Figure 5. Supply Current vs Supply Voltage
FN4878 Rev.10.00
May.29.19
Page 9 of 24
ICL3225, ICL3245
4.
4. Detailed Description
Detailed Description
The ICL3225 and ICL3245 operate from a single +3V to +5.5V supply, ensure a 1Mbps minimum data rate,
require only four small external 0.1µF capacitors, feature low power consumption, and meet all ElA RS-232C and
V.28 specifications.
4.1
Charge Pump
The ICL32xx family uses regulated on-chip dual charge pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a VCC supply as low as 3.0V. The charge pumps allow these devices to
maintain RS-232 compliant output levels over the ±10% tolerance range of 3.3V powered systems. The efficient
on-chip power supplies require only four small external 0.1µF capacitors for the voltage doubler and inverter
functions at VCC = 3.3V. See “Capacitor Selection” on page 17 and Table 6 for capacitor recommendations for
other operating conditions. The charge pumps operate discontinuously (turning off as soon as the V+ and Vsupplies are pumped up to the nominal values), resulting in significant power savings.
4.1.1 Charge Pump Abs Max Ratings
The ICL3238E is fully characterized for 3.0V to 3.6V operation, and at critical points for 4.5V to 5.5V operation.
Furthermore, load conditions were favorable using static logic states only.
The specified maximum values for V+ and V- are +7V and -7V, respectively. These limits apply for VCC values set
to 3.0V and 3.6V (see Table 2). For VCC values set to 4.5V and 5.5V, the maximum values for V+ and V- can
approach +9V and -7V, respectively (Table 3 on page 11). The breakdown characteristics for V+ and V- were
measured with ±13V.
Table 2.
V+ and V- Values for VCC = 3.0V to 3.6V
C1 (μF)
C2, C3, C4 (μF)
Load
T1IN
(Logic State)
0.1
0.1
Open
H
3kΩ // 1000pF
0.047
0.33
Open
3kΩ // 1000pF
1
1
Open
3kΩ // 1000pF
FN4878 Rev.10.00
May.29.19
V+ (V)
V- (V)
VCC = 3.0V
VCC = 3.6V
VCC = 3.0V
VCC = 3.6V
5.80
6.56
-5.60
-5.88
L
5.80
6.56
-5.60
-5.88
2.4kbps
5.80
6.56
-5.60
-5.88
H
5.88
6.60
-5.56
-5.92
L
5.76
6.36
-5.56
-5.76
2.4kbps
6.00
6.64
-5.64
-5.96
H
5.68
6.00
-5.60
-5.60
L
5.68
6.00
-5.60
-5.60
2.4kbps
5.68
6.00
-5.60
-5.60
H
5.76
6.08
-5.64
-5.64
L
5.68
6.04
-5.60
-5.60
2.4kbps
5.84
6.16
-5.64
-5.72
H
5.88
6.24
-5.60
-5.60
L
5.88
6.28
-5.60
-5.64
2.4kbps
5.80
6.20
-5.60
-5.60
H
5.88
6.44
-5.64
-5.72
L
5.88
6.04
-5.64
-5.64
2.4kbps
5.92
6.40
-5.64
-5.64
Page 10 of 24
ICL3225, ICL3245
Table 3.
4. Detailed Description
V+ and V- Values for VCC = 4.5V to 5.5V
V+ (V)
V- (V)
C1 (μF)
C2, C3, C4 (μF)
Load
T1IN
(Logic State)
0.1
0.1
Open
H
7.44
8.48
-6.16
-6.40
L
7.44
8.48
-6.16
-6.44
2.4kbps
7.44
8.48
-6.17
-6.44
H
7.76
8.88
-6.36
-6.72
3kΩ // 1000pF
0.047
0.33
Open
3kΩ // 1000pF
1
1
Open
3kΩ // 1000pF
VCC = 4.5V
VCC = 5.5V
VCC = 4.5V
VCC = 5.5V
L
7.08
8.00
-5.76
-5.76
2.4kbps
7.76
8.84
-6.40
-6.64
H
6.44
6.88
-5.80
-5.88
L
6.48
6.88
-5.84
-5.88
2.4kbps
6.44
6.88
-5.80
-5.88
H
6.64
7.28
-5.92
-6.04
L
6.24
6.60
-5.52
-5.52
2.4kbps
6.72
7.16
-5.92
-5.96
H
6.84
7.60
-5.76
-5.76
L
6.88
7.60
-5.76
-5.76
2.4kbps
6.92
7.56
-5.72
-5.76
H
7.28
8.16
-5.80
-5.92
L
6.44
6.84
-5.64
-6.84
2.4kbps
7.08
7.76
-5.80
-5.80
The resulting new maximum voltages at V+ and V- are listed in Table 4.
Table 4.
4.2
New Measured Withstanding Voltages
V+, V- to Ground
±13V
V+ to V-
20V
Transmitters
The transmitters are proprietary, low dropout, inverting drivers that translate TTL/CMOS inputs to EIA/TIA-232
output levels. The transmitters are coupled with the on-chip ±5.5V supplies and deliver true RS-232 levels across
a wide range of single supply system voltages.
Transmitter outputs disable and assume a high impedance state when the device enters the powerdown mode
(see Table 5 on page 12). These outputs can be driven to ±12V when disabled.
All devices ensure a 1Mbps data rate for full load conditions (3kΩ and 250pF), VCC ≥ 3.0V, with one transmitter
operating at full speed. Under more typical conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF, one transmitter
easily operates at 1.4Mbps. Transmitter skew is extremely low on the ICL3225 and ICL3245, and is specified at
the receiver input trip points (1.4V) rather than the arbitrary 0V crossing point typical of other RS-232 families.
Transmitter inputs float if unconnected and may cause ICC increases. Connect unused inputs to GND for the best
performance.
FN4878 Rev.10.00
May.29.19
Page 11 of 24
ICL3225, ICL3245
4.3
4. Detailed Description
Receivers
All the ICL32xx devices contain standard inverting receivers, but only the ICL3245 receivers can tri-state with the
FORCEOFF control line. The ICL3245 also includes a noninverting (monitor) receiver (denoted by the ROUTB
label) that is always active, regardless of the state of any control lines. Both receiver types convert RS-232 signals
to CMOS output levels and accept inputs up to ±25V while presenting the required 3kΩ to 7kΩ input impedance
(see Figure 6) even if the power is off (VCC = 0V). The receivers’ Schmitt trigger input stage uses hysteresis to
increase noise immunity and decrease errors due to slow input signal transitions.
VCC
RXOUT
RXIN
-25V ≤ VRIN ≤ +25V
5kΩ
GND ≤ VROUT ≤ VCC
GND
Figure 6. Inverting Receiver Connections
The ICL3245 inverting receivers disable during forced (manual) powerdown, but not during automatic powerdown
(see Table 5).
Table 5.
Powerdown Logic Truth Table
Rcvr or
Xmtr Edge FORCEOFF FORCEON
Within 30s?
Input
Input
Transmitter
Outputs
Receiver
Outputs
(Note 7)
ROUTB
Outputs
Rs-232
Level
Present at
Receiver
Input?
INVALID
Output
Mode of Operation
ICL3225
No
H
H
Active
Active
N/A
No
L
No
H
H
Active
Active
N/A
Yes
H
Yes
H
L
Active
Active
N/A
No
L
Yes
H
L
Active
Active
N/A
Yes
H
No
H
L
High-Z
Active
N/A
No
L
No
H
L
High-Z
Active
N/A
Yes
H
X
L
X
High-Z
Active
N/A
No
L
X
L
X
High-Z
Active
N/A
Yes
H
Normal Operation
(Enhanced Auto
Powerdown Disabled)
Normal Operation
(Enhanced Auto
Powerdown Enabled)
Powerdown Due to
Enhanced Auto
Powerdown Logic
Manual Powerdown
ICL322X - INVALID Driving FORCEON and FORCEOFF (Emulates Automatic Powerdown)
X
Note 8
Note 8
Active
Active
N/A
Yes
H
Normal Operation
X
Note 8
Note 8
High-Z
Active
N/A
No
L
Forced Auto Powerdown
No
H
H
Active
Active
Active
No
L
No
H
H
Active
Active
Active
Yes
H
Normal Operation
(Enhanced Auto
Powerdown Disabled)
Yes
H
L
Active
Active
Active
No
L
Yes
H
L
Active
Active
Active
Yes
H
No
H
L
High-Z
Active
Active
No
L
No
H
L
High-Z
Active
Active
Yes
H
X
L
X
High-Z
High-Z
Active
No
L
X
L
X
High-Z
High-Z
Active
Yes
H
ICL3245
FN4878 Rev.10.00
May.29.19
Normal Operation
(Enhanced Auto
Powerdown Enabled)
Powerdown Due to
Enhanced Auto
Powerdown Logic
Manual Powerdown
Page 12 of 24
ICL3225, ICL3245
Table 5.
4. Detailed Description
Powerdown Logic Truth Table
Rcvr or
Xmtr Edge FORCEOFF FORCEON
Within 30s?
Input
Input
Transmitter
Outputs
Receiver
Outputs
(Note 7)
ROUTB
Outputs
Rs-232
Level
Present at
Receiver
Input?
INVALID
Output
Mode of Operation
ICL3245 - INVALID Driving FORCEON and FORCEOFF (Emulates Automatic Powerdown)
X
Note 8
Note 8
Active
Active
Active
Yes
H
Normal Operation
X
Note 8
Note 8
High-Z
High-Z
Active
No
L
Forced Auto Powerdown
Notes:
7. Applies to the ICL3245 only.
8. Input is connected to the INVALID output.
Conversely, the monitor receiver remains active even during manual powerdown, so it is extremely useful for Ring
Indicator monitoring. Standard receivers driving powered down peripherals must be disabled to prevent current
flow through the peripheral’s protection diodes (see Figures 7 and 8). Disabling the recievers prevents them from
being used for wake up functions, but the corresponding monitor receiver can be dedicated to this task as shown
in Figure 7.
VCC
VCC
Current
Flow
VCC
VOUT = VCC
Rx
Powered
Down
UART
Tx
SHDN = GND
GND
Old
RS-232 Chip
Figure 7. Power Drain Through Powered Down Peripheral
VCC
Transition
Detector
To
Wake-Up
Logic
ICL3245
VCC
R2OUTB
RX
Powered
Down
UART
VOUT = HI-Z
R2OUT
TX
R2IN
T1IN
T1OUT
FORCEOFF = GND
Figure 8. Disabled Receivers Prevent Power Drain
FN4878 Rev.10.00
May.29.19
Page 13 of 24
ICL3225, ICL3245
4.4
4. Detailed Description
Operation Down to 2.7V
The ICL3225 and ICL3245 transmitter outputs meet RS-562 levels (±3.7V) at full data rate with VCC as low as
2.7V. RS-562 levels typically ensure interoperability with RS-232 devices.
4.5
Powerdown Functionality
The ICL3225 and ICL3245 require a nominal supply current of 0.3mA during normal operation (not in powerdown
mode). This supply current is considerably less than the 5mA to 11mA current required by 5V RS-232 devices.
The already low current requirement drops significantly when the device enters powerdown mode. In powerdown,
supply current drops to 1µA because the on-chip charge pump turns off (V+ collapses to VCC, V- collapses to
GND), and the transmitter outputs tri-state. Inverting receiver outputs may disable in powerdown; see Table 5 on
page 12 for details. This micro-power mode makes the ICL3225 and ICL3245 ideal for battery powered and
portable applications.
4.5.1 Software Controlled (Manual) Powerdown
The ICL3225 and ICL3245 allow you to force the IC into the low power standby state, and uses a two pin
approach where the FORCEON and FORCEOFF inputs determine the IC’s mode. For always enabled operation,
FORCEON and FORCEOFF are both strapped high. Under logic or software control, only the FORCEOFF input
needs to be driven to switch between active and powerdown modes. The FORCEON state is not critical because
FORCEOFF overrides FORCEON. However, if strictly manual control over powerdown is needed, you must strap
FORCEON high to disable the enhanced automatic powerdown circuitry. ICL3245 inverting (standard) receiver
outputs also disable when the device is in powerdown and eliminate the possible current path through a shutdown
peripheral’s input protection diode (see Figures 7 and 8).
Connecting FORCEOFF and FORCEON together disables the enhanced automatic powerdown feature and
enables them to function as a manual SHUTDOWN input (see Figure 9).
FORCEOFF
Power
Management
Logic
FORCEON
INVALID
ICL3225/ICL3245
I/O
UART
CPU
Figure 9. Connections for Manual Powerdown When No Valid Receiver Signals are Present
With any of the above control schemes, the time required to exit powerdown and resume transmission is only
100µs.
When using both manual and enhanced automatic powerdown (FORCEON = 0), the ICL3225/ICL3245 does not
power up from manual powerdown until both FORCEOFF and FORCEON are driven high, or until a transition occurs
on a receiver or transmitter input. Figure 10 on page 15 shows a circuit for ensuring that the ICL3225/ICL3245 powers
up as soon as FORCEOFF switches high. The rising edge of the Master Powerdown signal forces the
ICL3225/ICL3245 to power up, and the ICL3225/ICL3245 returns to enhanced automatic powerdown mode an RC
time constant after this rising edge. The time constant is not critical because the ICL3225/ICL3245 remains powered
up for 30 seconds after the FORCEON falling edge, even if there are no signal transitions. This gives slow-to-wake
systems (for example, a mouse) plenty of time to start transmitting. As long as the systems start transmitting within 30
seconds, both systems remain enabled.
FN4878 Rev.10.00
May.29.19
Page 14 of 24
ICL3225, ICL3245
4. Detailed Description
Power
Management
Unit
Master Powerdown Line
0.1µF
FORCEOFF
1MΩ
FORCEON
ICL3225/ICL3245
Figure 10. Circuit to Ensure Immediate Power Up When Exiting Forced Powerdown
4.5.2 INVALID Output
Table 5 shows that the INVALID output always indicates whether 30µs have elapsed with invalid RS-232 signals
persisting on all of the receiver inputs (see Figures 11 and 13). The indicator provides an easy way to determine
when the interface block should power down. Invalid receiver levels occur whenever the driving peripheral’s
outputs are shut off (powered down) or when the RS-232 interface cable is disconnected. If an interface cable is
disconnected and all the receiver inputs are floating (but pulled to GND by the internal receiver pull down
resistors), the INVALID logic detects the invalid levels and drives the output low. The power management logic
then uses the indicator to power down the interface block. Reconnecting the cable restores valid levels at the
receiver inputs, INVALID switches high, and the power management logic wakes up the interface block. INVALID
can also be used to indicate the DTR or RING INDICATOR signal as long as the other receiver inputs are floating,
or driven to GND (as in the case of a powered down driver).
2.7V
Valid RS-232 Level - INVALID = 1
Indeterminate
0.3V
Invalid LeveL - INVALID = 0
-0.3V
Indeterminate
-2.7V
Valid RS-232 Level - INVALID = 1
Figure 11. Definition of Valid RS-232 Receiver Levels
4.5.3 Enhanced Automatic Powerdown
Even greater power savings are available by using the enhanced automatic powerdown function. When the
enhanced powerdown logic determines that no transitions have occurred on any of the transmitter or receiver
inputs for 30 seconds, the charge pump and transmitters power down and reduce supply current to 1µA. The
ICL3225/ICL3245 automatically powers back up whenever it detects a transition on one of these inputs. This
automatic powerdown feature provides additional system power savings without changes to the existing operating
system.
Enhanced automatic powerdown operates when the FORCEON input is low and the FORCEOFF input is high.
Tying FORCEON high disables automatic powerdown, but manual powerdown is always available from the
overriding FORCEOFF input. Table 5 summarizes the enhanced automatic powerdown functionality.
FN4878 Rev.10.00
May.29.19
Page 15 of 24
ICL3225, ICL3245
4. Detailed Description
Figure 12 illustrates the enhanced powerdown control logic. Note: When the ICL3225/ICL3245 enters powerdown
(manually or automatically), the 30 second timer remains timed out (set), keeping the ICL3225/ICL3245 powered
down until FORCEON transitions high, or until a transition occurs on a receiver or transmitter input.
FORCEOFF
T_IN
Edge
Detect
S
30s
Timer
R_IN
AUTOSHDN
R
Edge
Detect
FORCEON
Figure 12. Enhanced Automatic Powerdown Logic
} Invalid
Region
Receiver
Inputs
Transmitter
Inputs
Transmitter
Outputs
tINVH
INVALID
Output
tINVL
tAUTOPWDN
tAUTOPWDN
tWU
tWU
READY
Output
V+
VCC
0
V-
Figure 13. Enhanced Automatic Powerdown, INVALID, and READY Timing Diagrams
The INVALID output signal switches low to indicate that invalid levels have persisted on all of the receiver inputs
for more than 30µs (see Figure 13), but this has no direct effect on the state of the ICL3225/ICL3245 (see
Emulating Standard Automatic Powerdown and Hybrid Automatic Powerdown Options for methods of using
INVALID to power down the device). INVALID switches high 1µs after detecting a valid RS-232 level on a receiver
input. INVALID operates in all modes (forced or automatic powerdown, or forced on), so it is also useful for
systems employing manual powerdown circuitry.
The time to recover from automatic powerdown mode is typically 100µs.
4.5.4 Emulating Standard Automatic Powerdown
If enhanced automatic powerdown is not required, you can implement the standard automatic powerdown feature
(mimics the function on the ICL3221, ICL3223, and ICL3243) by connecting the INVALID output to the FORCEON
and FORCEOFF inputs, as shown in Figure 14 on page 17. After 30µs of invalid receiver levels, INVALID switches
low and drives the ICL3225/ICL3245 into a forced powerdown condition. INVALID switches high as soon as a
receiver input senses a valid RS-232 level and forces the ICL3225/ICL3245 to power on. See the “INVALID
DRIVING FORCEON AND FORCEOFF” section of Table 5 on page 12 for an operational summary. This
FN4878 Rev.10.00
May.29.19
Page 16 of 24
ICL3225, ICL3245
4. Detailed Description
FORCEOFF
FORCEON
INVALID
operational mode is perfect for handheld devices that communicate with another computer through a detachable
cable. Detaching the cable allows the internal receiver pull-down resistors to pull the inputs to GND (an invalid
RS-232 level) and causes the 30µs timer to time out and drive the IC into powerdown. Reconnecting the cable
restores valid levels and causes the IC to power back up.
ICL3225/ICL3245
I/O
UART
CPU
Figure 14. Connections for Automatic Powerdown When No Valid Receiver Signals Are Present
4.5.5 Hybrid Automatic Powerdown Options
For devices that communicate only through a detachable cable, you can connect INVALID to FORCEOFF (with
FORCEON = 0). While the cable is attached, INVALID and FORCEOFF remain high, so the enhanced automatic
powerdown logic powers down the RS-232 device whenever there is 30 seconds of inactivity on the receiver and
transmitter inputs. Detaching the cable allows the receiver inputs to drop to an invalid level (GND), so INVALID
switches low and forces the RS-232 device to power down. The ICL3225/ICL3245 remains powered down until
the cable is reconnected (INVALID = FORCEOFF = 1) and a transition occurs on a receiver or transmitter input
(see Figure 12 on page 16). For immediate power up when the cable is reattached, connect FORCEON to
FORCEOFF through a network similar to that shown in Figure 10 on page 15.
4.6
READY Output (ICL3225 Only)
The READY output indicates that the ICL3225/ICL3245 is ready to transmit. READY switches low whenever the
device enters powerdown and switches back high during power-up when V- reaches -4V or lower.
4.7
Capacitor Selection
The charge pumps require 0.1µF capacitors for 3.3V operation. For other supply voltages, see Table 6 for
capacitor values. Do not use values smaller than those listed in Table 6. Increasing the capacitor values (by a
factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can
be increased without increasing C1’s value; however, do not increase C1 without also increasing C2, C3, and C4 to
maintain the proper ratios (C1 to the other capacitors).
When using minimum required capacitor values, make sure that capacitor values do not degrade excessively with
temperature. If in doubt, use capacitors with a larger nominal value. The capacitor’s Equivalent Series Resistance
(ESR) usually rises at low temperatures and influences the amount of ripple on V+ and V-.
Table 6.
Required Capacitor Values
VCC (V)
C1 (µF)
C2, C3, C4 (µF)
3.0 to 3.6
0.1
0.1
4.5 to 5.5
0.047
0.33
3.0 to 5.5
0.1
0.47
FN4878 Rev.10.00
May.29.19
Page 17 of 24
ICL3225, ICL3245
4.8
4. Detailed Description
Power Supply Decoupling
In most circumstances a 0.1µF bypass capacitor is adequate. In applications that are particularly sensitive to
power supply noise, decouple VCC to ground with a capacitor of the same value as the charge-pump capacitor C1.
Connect the bypass capacitor as close as possible to the IC.
4.9
Transmitter Outputs when Exiting Powerdown
Figure 15 shows the response of two transmitter outputs when exiting powerdown mode. As the transmitter
outputs activate, they properly go to opposite RS-232 levels, with no glitching, ringing, or undesirable transients.
Each transmitter is loaded with 3kΩin parallel with 2500pF. Note: The transmitters enable only when the
magnitude of the supplies exceed approximately 3V.
5V/Div
FORCEOFF
T1
VCC = +3.3V
C1 - C4 = 0.1µF
2V/Div
T2
5V/Div
READY
Time (20µs/Div)
Figure 15. Transmitter Outputs When Exiting Powerdown
4.10
Mouse Driveability
The ICL3245 is specifically designed to power a serial mouse while operating from low voltage supplies.
Figure 16 shows the transmitter output voltages under increasing load current. The on-chip switching regulator
ensures the transmitters supply at least ±5V during worst case conditions (15mA for paralleled V+ transmitters,
7.3mA for single V- transmitter).
6
Transmitter Output Voltage (V)
5
VOUT+
4
VCC = 3.0V
3
2
T1
1
VOUT+
0
T2
-1
ICL3245
-2
VCC
-3
VOUT -
T3
VOUT -
-4
-5
-6
0
1
2
3
4
5
6
7
8
9
10
Load Current per Transmitter (mA)
Figure 16. Transmitter Output Voltage vs Load Current (Per
Transmitter (Double Current Axis for Total VOUT+ Current))
FN4878 Rev.10.00
May.29.19
Page 18 of 24
ICL3225, ICL3245
4.11
4. Detailed Description
High Data Rates
The ICL3225/ICL3245 maintain the RS-232 ±5V minimum transmitter output voltages even at high data rates.
Figure 17 shows a transmitter loopback test circuit, and Figure 18 shows the loopback test result at 250kbps. For
this test, all transmitters were simultaneously driving RS-232 loads in parallel with 1000pF, at 250kbps. Figure 19
shows the loopback results for a single transmitter driving 250pF and an RS-232 load at 1Mbps. The static
transmitters were also loaded with an RS-232 receiver.
VCC
+
0.1µF
+
VCC
C1+
C1
V+
C1ICL3225/ICL3245
+
V-
C2+
C2
C2TIN
C4
+
TOUT
CL
RIN
ROUT
FORCEON
VCC
+
C3
5k
FORCEOFF
Figure 17. Transmitter Loopback Test Circuit
5V/Div
5V/Div
T1IN
T1IN
T1OUT
T1OUT
R1OUT
R1OUT
VCC = +3.3V
C1 - C4 = 0.1µF
VCC = +3.3V
C1 - C4 = 0.1µF
0.5µs/Div
2µs/Div
Figure 19. Loopback Test at 1Mbps (CL = 250pF)
Figure 18. Loopback Test at 250kbps (CL = 1000pF)
4.12
Interconnection with 3V and 5V Logic
The ICL3225/ICL3245 directly interfaces with 5V CMOS and TTL logic families. AC, HC, and CD4000 can drive
ICL3225/ICL3245 inputs at 3.3V and the logic supply at 5V, but ICL3225/ICL3245 outputs do not reach the
minimum VIH for these logic families. See Table 7 for more information.
Table 7.
Logic Family Compatibility with Various Supply Voltages
System Power-Supply Voltage (V)
VCC Supply
Voltage (V)
3.3
3.3
5
5
5
3.3
FN4878 Rev.10.00
May.29.19
Compatibility
Compatible with all CMOS families.
Compatible with all TTL and CMOS logic families.
Compatible with ACT and HCT CMOS, and with TTL. ICL3225/ICL3245
outputs are incompatible with AC, HC, and CD4000 CMOS inputs.
Page 19 of 24
ICL3225, ICL3245
5.
5. Die Characteristics
Die Characteristics
Substrate Potential (Powered Up)
GND
Transistor Count
ICL3225
937
ICL3245
1109
Process
FN4878 Rev.10.00
May.29.19
Si Gate CMOS
Page 20 of 24
ICL3225, ICL3245
6.
6. Revision History
Revision History
Date
Revision
May.29.19
FN4878.10
Updated ordering information table starting on page 4:
-Added tape and reel column
-Added notes 1 and 3
-Added information about recommended replacements for end of life parts: ICL3225CAZ,
ICL3225CAZ-T, ICL3225IAZ, and ICL3225IAZ-T
-Removed ICL3225CPZ, ICL3245IVZ, and ICL3245IVZ-T
Removed package outline drawings E20.3 and M28.173.
Added Charge Pump Abs Max Ratings section starting on page 12.
Applied new template.
Updated disclaimer.
Oct.5.15
FN4878.9
Added Rev History and About Intersil section.
Updated Ordering Information on page 5.
FN4878 Rev.10.00
May.29.19
Change
Page 21 of 24
ICL3225, ICL3245
7.
7. Package Outline Drawings
Package Outline Drawings
For the most recent package outline drawing, see M20.209.
M20.209 (JEDEC MO-150-AE ISSUE B)
20 Lead Shrink Small Outline Plastic Package (SSOP)
INCHES
N
INDEX
AREA
H
0.25(0.010) M
E
GAUGE
PLANE
-B1
2
3
0.25
0.010
SEATING PLANE
-A-
SYMBOL
B M
A
D
e
A1
B
A2
C
0.10(0.004)
C A M
B S
MAX
MILLIMETERS
MIN
MAX
NOTES
A
0.068
0.078
1.73
1.99
A1
0.002
0.008’
0.05
0.21
A2
0.066
0.070’
1.68
1.78
B
0.010’
0.015
0.25
0.38
C
0.004
0.008
0.09
0.20’
D
0.278
0.289
7.07
7.33
3
E
0.205
0.212
5.20’
5.38
4
e
-C-
0.25(0.010) M
L
MIN
0.026 BSC
0.65 BSC
H
0.301
0.311
7.65
7.90’
L
0.025
0.037
0.63
0.95
8 deg.
0 deg.
N
20
0 deg.
9
6
20
7
8 deg.
Rev. 3 11/02
Notes:
1. Symbols are defined in the “MO Series Symbol List” in Section
2.2 of Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.20mm (0.0078 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions.
Interlead flash and protrusions shall not exceed 0.20mm (0.0078
inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “B” does not include dambar protrusion. Allowable
dambar protrusion shall be 0.13mm (0.005 inch) total in excess
of “B” dimension at maximum material condition.
10. Controlling dimension: MILLIMETER. Converted inch
dimensions are not necessarily exact.
FN4878 Rev.10.00
May.29.19
Page 22 of 24
ICL3225, ICL3245
7. Package Outline Drawings
For the most recent package outline drawing, see M28.209.
M28.209 (JEDEC MO-150-AH ISSUE B)
28 Lead Shrink Small Outline Plastic Package (SSOP)
N
INCHES
INDEX
AREA
H
0.25(0.010) M
E
GAUGE
PLANE
-B1
2
3
0.25
0.010
SEATING PLANE
-A-
SYMBOL
B M
A
D
e
A2
A1
B
C
0.10(0.004)
C A M
B S
Notes:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication Number 95.
MAX
MIN
MAX
NOTES
A
-
0.078
-
2.00
-
A1
0.002
-
0.05
-
-
A2
0.065
0.072
1.65
1.85
-
B
0.009
0.014
0.22
0.38
9
C
0.004
0.009
0.09
0.25
-
D
0.390
0.413
9.90
10.50
3
E
0.197
0.220
5.00
5.60
4
e
-C-
0.25(0.010) M
L
MILLIMETERS
MIN
0.026 BSC
0.65 BSC
-
H
0.292
0.322
7.40
8.20
-
L
0.022
0.037
0.55
0.95
6
8°
0°
N
28
0°
28
7
8°
Rev. 2 6/05
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.20mm (0.0078 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions.
Interlead flash and protrusions shall not exceed 0.20mm (0.0078
inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “B” does not include dambar protrusion. Allowable
dambar protrusion shall be 0.13mm (0.005 inch) total in excess of
“B” dimension at maximum material condition.
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
FN4878 Rev.10.00
May.29.19
Page 23 of 24
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