DATASHEET
ISL81387, ISL41387
FN6201
Rev 4.00
June 9, 2014
±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers
These devices are BiCMOS interface ICs that are user
configured as either a single RS-422, RS-485 differential
transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver.
In RS-232 mode, the on-board charge pump generates RS-232
compliant ±5V Tx output levels, from a supply as low as 4.5V.
Four small 0.1µF capacitors are required for the charge pump.
The transceivers are RS-232 compliant, with the Rx inputs
handling up to 25V, and the Tx outputs handling ±12V.
In RS-485 mode, the transceivers support both the RS-485
and RS-422 differential communication standards. The
RS-485 receiver features "full fail-safe" operation, so the Rx
output remains in a high state if the inputs are open or shorted
together. The RS-485 transmitter supports up to three data
rates, two of which are slew rate limited for problem free
communications. The charge pump disables in RS-485 mode,
thereby saving power, minimizing noise, and eliminating the
charge pump capacitors.
Features
• 5V powered, user selectable RS-232 or RS-485, RS-422
interface port (two RS-232 transceivers or one RS-485,
RS-422 transceiver)
• ±15kV (HBM) ESD protected bus pins (RS-232 or RS-485)
• True flow-through pinouts simplify board layouts
• Pb-Free (RoHS compliant)
• Large (2.7V) differential VOUT for improved noise immunity
in RS-485, RS-422 networks
• Full fail-safe (open/short) Rx in RS-485, RS-422 mode
• Loopback mode facilitates board self test functions
• User selectable RS-485 data rates . . . . . . . . . . . . . . 20Mbps
- Slew rate limited . . . . . . . . . . . . . . . . . . . . . . . . . . . 460kbps
- Slew rate limited (ISL41387 only) . . . . . . . . . . . . . 115kbps
Both RS-232, RS-485 modes feature loopback and shutdown
functions. The loopback mode internally connects the Tx
outputs to the corresponding Rx input, which facilitates the
implementation of board level self test functions. The outputs
remain connected to the loads during loopback, so connection
problems (e.g., shorted connectors or cables) can be detected.
The shutdown mode disables the Tx and Rx outputs, disables
the charge pump if in RS-232 mode, and places the IC in a low
current (35µA) mode.
• Fast RS-232 data rate . . . . . . . . . . . . . . . . . . . . up to 650kbps
The ISL41387 is a QFN packaged device that offers additional
functionality, including a lower speed and edge rate option
(115kbps) for EMI sensitive designs, or to allow longer bus
lengths. It also features a logic supply voltage pin (VL) that sets
the VOH level of logic outputs, and the switching points of logic
inputs, to be compatible with another supply voltage in mixed
voltage systems. The QFN's choice of active high or low Rx
enable pins increases design flexibility, allowing Tx/Rx
direction control via a single signal by connecting DEN and
RXEN together.
• Single board computers
For a dual port version of these devices, please see the
ISL81334, ISL41334 datasheet.
• AN1378, “Implementing a Three Pin, Half-Duplex, Dual
Protocol (RS-232/RS-485) Interface Using the ISL81387 or
ISL41387.”
• Low current shutdown mode . . . . . . . . . . . . . . . . . . . . . . 35µA
• QFN package saves board space (ISL41387 only)
• Logic supply pin (VL) eases operation in mixed supply
systems (ISL41387 only)
Applications
• Gaming applications (e.g., slot machines)
• Factory automation
• Security networks
• Industrial/process control networks
• Level translators (e.g., RS-232 to RS-422)
• Point of sale equipment
Related Literature
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF
PORTS
PACKAGE OPTIONS
RS-485 DATA RATE
(bps)
RS-232 DATA
RATE (kbps)
VL PIN?
ACTIVE H or L Rx
ENABLE?
LOW POWER
SHUTDOWN?
ISL81387
1
20 Ld SOIC, 20 Ld SSOP
20M, 460k
650
NO
H
YES
ISL41387
1
40 Ld QFN (6mmx6mm)
20M, 460k, 115k
650
YES
BOTH
YES
FN6201 Rev 4.00
June 9, 2014
Page 1 of 27
ISL81387, ISL41387
Ordering Information
PART NUMBER
(Notes 1, 2)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL81387IAZ
81387 IAZ
-40 to +85
20 Ld SSOP
M20.209
ISL81387IBZ
ISL81387IBZ
-40 to +85
20 Ld SOIC
M20.3
ISL41387IRZ
41387 IRZ
-40 to +85
40 Ld QFN
L40.6x6
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pbfree products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Pin Configurations
ISL81387
(20 LD SOIC, SSOP)
TOP VIEW
C1+ 1
20 C2+
C1- 2
19 C2-
V+
3
18 VCC
A 4
17 RA
B 5
16 RB
Y 6
15 DY
Z 7
14 DZ/SLEW
13 ON
485/232 8
DEN 9
12 RXEN
GND 10
11 V-
FN6201 Rev 4.00
June 9, 2014
NC
NC
C1-
C1+
C2+
C2-
VCC
NC
NC
VL
ISL41387
(40 LD QFN)
TOP VIEW
40
39
38
37
36
35
34
33
32
31
V+
1
30 RA
A
2
29 RB
B
3
28 DY
Y
4
27 DZ/SLEW
Z
5
26 NC
EP
25 NC
22 NC
NC
10
21 ON
11
12
13
14
15
16
17
18
19
20
RXEN
9
V-
NC
NC
23 NC
RXEN
8
GND
NC
GND
24 NC
SPB
7
NC
NC
DEN
6
485/232
NC
Page 2 of 27
ISL81387, ISL41387
TABLE 2. ISL81387 FUNCTION TABLE
INPUTS
RECEIVER OUTPUTS
DRIVER OUTPUTS
CHARGE
PUMPS
(Note 3)
LOOPBACK
(Note 4)
MODE
485/232
ON
RXEN
DEN
SLEW
RA
RB
Y
Z
DRIVER
SPEED
(Mbps)
0
1
0
0
N.A.
High-Z
High-Z
High-Z
High-Z
-
ON
OFF
RS-232
0
1
0
1
N.A.
High-Z
High-Z
ON
ON
0.46
ON
OFF
RS-232
0
1
1
0
N.A.
ON
ON
High-Z
High-Z
-
ON
OFF
RS-232
0
1
1
1
N.A.
ON
ON
ON
ON
0.46
ON
OFF
RS-232
0
0
0
1
N.A.
High-Z
High-Z
ON
High-Z
0.46
ON
OFF
RS-232
0
0
1
0
N.A.
High-Z
ON
ON
High-Z
0.46
ON
OFF
RS-232
0
0
1
1
N.A.
ON
ON
ON
ON
0.46
ON
ON
RS-232
X
0
0
0
X
High-Z
High-Z
High-Z
High-Z
-
OFF
OFF
Shutdown
1
1
0
0
X
High-Z
High-Z
High-Z
High-Z
-
OFF
OFF
RS-485
1
X
0
1
1/0
High-Z
High-Z
ON
ON
20/0.46
OFF
OFF
RS-485
1
X
1
0
X
ON
High-Z
High-Z
High-Z
-
OFF
OFF
RS-485
1
1
1
1
1/0
ON
High-Z
ON
ON
20/0.46
OFF
OFF
RS-485
1
0
1
1
1/0
ON
High-Z
ON
ON
20/0.46
OFF
ON
RS-485
NOTES:
3. Charge pumps are on if in RS-232 mode and ON or DEN or RXEN are high.
4. Loopback is enabled when ON = 0, and DEN = RXEN = 1.
ISL81387 Truth Tables
RS-485 TRANSMITTING MODE
INPUTS (ON = 1)
RS-232 TRANSMITTING MODE
INPUTS (ON = 1)
OUTPUTS
485/232
DEN
DY
DZ
Y
Z
0
1
0
0
1
1
0
1
0
1
1
0
0
1
1
0
0
1
0
1
1
1
0
0
0
0
X
X
High-Z
High-Z
485/232
DEN
DY
SLEW
Y
Z
DATA RATE
(Mbps)
1
1
0
1
1
0
20
1
1
1
1
0
1
20
1
1
0
0
1
0
0.46
1
1
1
0
0
1
0.46
1
0
X
X
High-Z
High-Z
-
RS-485 RECEIVING MODE
RS-232 RECEIVING MODE
INPUTS (ON = 1)
INPUTS (ON = 1)
OUTPUT
485/232
RXEN
A
B
RA
RB
0
1
0
0
1
1
0
1
0
1
1
0
0
1
1
0
0
1
0
1
1
1
0
0
0
1
Open
Open
1
1
0
0
X
X
High-Z
High-Z
FN6201 Rev 4.00
June 9, 2014
OUTPUTS
OUTPUT
485/232
RXEN
B-A
RA
RB
1
1
-40mV
1
High-Z
1
1
-200mV
0
High-Z
1
1
Open or Shorted together
1
High-Z
1
0
X
High-Z
High-Z
Page 3 of 27
ISL81387, ISL41387
TABLE 3. ISL41387 FUNCTION TABLE
RECEIVER
OUTPUTS
INPUTS
DRIVER
OUTPUTS
Z
DRIVER
DATA
RATE
(Mbps)
CHARGE
PUMPS
(Note 5)
MODE
485/232
ON
RXEN
and/or
RXEN
0
1
1 and 0
0
N.A.
N.A.
High-Z
High-Z
High-Z
High-Z
-
ON
RS-232
0
1
1 and 0
1
N.A.
N.A.
High-Z
High-Z
ON
ON
0.46
ON
RS-232
0
1
0 or 1
0
N.A.
N.A.
ON
ON
High-Z
High-Z
-
ON
RS-232
0
1
0 or 1
1
N.A.
N.A.
ON
ON
ON
ON
0.46
ON
RS-232
0
0
1 and 0
1
N.A.
N.A.
High-Z
High-Z
ON
High-Z
0.46
ON
RS-232
0
0
0 or 1
0
N.A.
N.A.
High-Z
ON
ON
High-Z
0.46
ON
RS-232
0
0
0 or 1
1
N.A.
N.A.
ON
ON
ON
ON
0.46
ON
RS-232 (Note 6)
DEN
SLEW
SPB
RA
RB
Y
X
0
1 and 0
0
X
X
High-Z
High-Z
High-Z
High-Z
-
OFF
Shutdown
1
1
1 and 0
0
X
X
High-Z
High-Z
High-Z
High-Z
-
OFF
RS-485
1
X
1 and 0
1
0
1/0
High-Z
High-Z
ON
ON
0.46/0.115
OFF
RS-485
1
X
1 and 0
1
1
X
High-Z
High-Z
ON
ON
20
OFF
RS-485
1
X
0 or 1
0
X
X
ON
High-Z
High-Z
High-Z
-
OFF
RS-485
1
1
0 or 1
1
0
1/0
ON
High-Z
ON
ON
0.46/0.115
OFF
RS-485
1
1
0 or 1
1
1
X
ON
High-Z
ON
ON
20
OFF
RS-485
1
0
0 or 1
1
0
1/0
ON
High-Z
ON
ON
0.46/0.115
OFF
RS-485 (Note 6)
1
0
0 or 1
1
1
X
ON
High-Z
ON
ON
20
OFF
RS-485 (Note 6)
NOTES:
5. Charge pumps are on if in RS-232 mode and ON or DEN or RXEN is high, or RXEN is low.
6. Loopback is enabled when ON = 0, and DEN = 1, and (RXEN = 1 or RXEN = 0).
ISL41387 Truth Tables
RS-485 TRANSMITTING MODE
INPUTS (ON = 1)
RS-232 TRANSMITTING MODE
INPUTS (ON = 1)
OUTPUTS
OUTPUTS
DATA
485/232
DEN
SLEW
SPB
DY
Y
Z
Mbps
485/232
DEN
DY
DZ
Y
Z
1
1
0
0
0/1
1/0
0/1
0.115
0
1
0
0
1
1
1
1
0
1
0/1
1/0
0/1
0.460
0
1
0
1
1
0
1
1
1
X
0/1
1/0
0/1
20
0
1
1
0
0
1
1
0
X
X
X
High-Z
High-Z
-
0
1
1
1
0
0
0
0
X
X
High-Z
High-Z
RS-232 RECEIVING MODE
INPUTS (ON = 1)
OUTPUT
RS-485 RECEIVING MODE
INPUTS (ON = 1)
OUTPUT
485/232
RXEN and/or RXEN
B-A
RA
RB
1
0 or 1
-40mV
1
High-Z
485/232
RXEN and/or RXEN
A
B
RA
RB
1
0 or 1
-200mV
0
High-Z
0
0 or 1
0
0
1
1
1
0 or 1
1
High-Z
0
0 or 1
0
1
1
0
Open or Shorted
together
0
0 or 1
1
0
0
1
1
1 and 0
X
High-Z
High-Z
0
0 or 1
1
1
0
0
0
0 or 1
Open
Open
1
1
0
1 and 0
X
X
FN6201 Rev 4.00
June 9, 2014
High-Z High-Z
Page 4 of 27
ISL81387, ISL41387
Pin Descriptions
PIN
MODE
FUNCTION
485/232
BOTH
Interface mode select input. High for RS-485 Mode and low for RS-232 Mode.
DEN
BOTH
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DEN high. They are high impedance when DEN is low.
GND
BOTH
Ground connection. This is also the potential of the QFN's thermal exposed pad (EP).
NC
BOTH
No Connection.
ON
BOTH
In RS-232 mode only, ON high enables the charge pumps. ON low, with DEN and RXEN low (and RXEN high if QFN), turns off the
charge pumps (in RS-232 mode), and in either mode places the device in low power shutdown. In both modes, when ON is low,
and DEN is high, and RXEN is high or RXEN is low, loopback is enabled.
RXEN
BOTH
Receiver output enable. Rx is enabled when RXEN is high; Rx is high impedance when RXEN is low and, if using the QFN package,
RXEN is high. When using the QFN and the active high Rx enable function, RXEN should be high or floating.
RXEN
BOTH
Active low receiver output enable. Rx is enabled when RXEN is low; Rx is high impedance when RXEN is high and RXEN is low.
(i.e., to use active low Rx enable function, tie RXEN to GND). For single signal Tx/Rx direction control, connect RXEN to DEN.
Internally pulled high. (QFN only)
VCC
BOTH
System power supply input (5V).
VL
BOTH
Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. (QFN only)
A
RS-232 Receiver input with 15kV ESD protection. A low on A forces RA high; a high on A forces RA low.
RS-485 Inverting receiver input with 15kV ESD protection.
B
RS-232 Receiver input with 15kV ESD protection. A low on B forces RB high; a high on B forces RB low.
RS-485 Noninverting receiver input with 15kV ESD protection.
DY
RS-232 Driver input. A low on DY forces output Y high. Similarly, a high on DY forces output Y low.
RS-485 Driver input. A low on DY forces output Y high and output Z low. Similarly, a high on DY forces output Y low and output Z high.
DZ
RS-232 Driver input. A low on DZ forces output Z high. Similarly, a high on DZ forces output Z low.
SLEW
RS-485 Slew rate control. With the SLEW pin high, the drivers run at the maximum slew rate (20Mbps). With the SLEW pin low, the drivers
run at a reduced slew rate (460kbps). On the QFN version, works in conjunction with SPB to select one of three RS-485 data
rates. Internally pulled high in RS-485 mode.
SPB
RS-485 Speed control. Works in conjunction with the SLEW pin to select the 20Mbps, 460kbps or 115kbps RS-485 data rate. Internally
pulled high. (QFN only)
RA
RS-232 Receiver output.
RS-485 Receiver output: If B > A by at least -40mV, RA is high; If B < A by -200mV or more, RA is low; RA = High if A and B are unconnected
(floating) or shorted together (i.e., full fail-safe).
RB
RS-232 Receiver output.
RS-485 Not used. Output is high impedance, and unaffected by RXEN and RXEN.
Y
RS-232 Driver output with 15kV ESD protection.
RS-485 Inverting driver output with 15kV ESD protection.
Z
RS-232 Driver output with 15kV ESD protection.
RS-485 Noninverting driver output with 15kV ESD protection.
C1+
RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed in RS-485 Mode.
C1-
RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed in RS-485 Mode.
C2+
RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed in RS-485 Mode.
C2-
RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed in RS-485 Mode.
V+
RS-232 Internally generated positive RS-232 transmitter supply (+5.5V). C3 not needed in RS-485 Mode.
V-
RS-232 Internally generated negative RS-232 transmitter supply (-5.5V). C4 not needed in RS-485 Mode.
/
FN6201 Rev 4.00
June 9, 2014
Page 5 of 27
ISL81387, ISL41387
Typical Operating Circuit
RS-232 MODE WITHOUT LOOPBACK
+5V
+5V
+
0.1µF
1
C1
0.1µF
+
C2
0.1µF
+
RS-232 MODE WITH LOOPBACK
2
20
19
C1+
VCC
C2-
5
5k
16
R
15
D
7
Z
17
R
6
Y
14
D
9
VCC
+ C3
0.1µF
C4
0.1µF
+
ON
C1
0.1µF
+
C2
0.1µF
+
2
+
C2
0.1µF
+
19
5k
DY
RB
DZ
7
Z
VCC
15
D
9
VCC
DZ
12
VCC
RXEN
DEN
8
VCC
DY
14
D
485/232
ON
GND
13
RS-485 MODE WITH LOOPBACK
C1+
VCC
C1C2+
V+
3
V- 11
C2-
4
17
R
5
6
15
D
7
9
+ C3
0.1µF
C4
0.1µF
+
+
C2
0.1µF
+
ON
2
20
19
A
4
B
5
C1+
18
VCC
C1C2+
V+
17
R
16
Y
6
15
D
7
SLEW
GND
+ C3
0.1µF
C4
0.1µF
+
RA
LB
Rx
DY
13
3
V- 11
C2-
RB
RXEN
485/232
0.1µF
1
C1
0.1µF
RA
12
DEN
8
+
18
14
FN6201 Rev 4.00
June 9, 2014
16
R
6
Y
Z
VCC
RA
LB
Rx
13
16
VCC
17
R
NOTE: PINOUT FOR SOIC AND SSOP
20
Z
C4
0.1µF
+
NOTE: PINOUT FOR SOIC AND SSOP
2
Y
V- 11
C2-
5
B1
+5V
B
+ C3
0.1µF
10
0.1µF
A
3
10
1
C1
0.1µF
V+
C2+
19
4
RS-485 MODE WITHOUT LOOPBACK
+
VCC
C1-
20
GND
+5V
18
C1+
5k
RB
RXEN
485/232
0.1µF
1
A1
RA
12
DEN
8
3
V- 11
5k
B
V+
C1C2+
4
A
+
18
VCC
VCC
14
VCC
VCC
9
8
RB
DY
SLEW
12
RXEN
DEN
485/232
GND
ON
VCC
13
10
10
NOTE: PINOUT FOR SOIC AND SSOP
NOTE: PINOUT FOR SOIC AND SSOP
Page 6 of 27
ISL81387, ISL41387
Absolute Maximum Ratings (TA = +25°C)
Thermal Information
VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
VL (QFN Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VCC + 0.5V
Input Voltages
All Except A, B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
Input/Output Voltages
A, B (Any Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25V to +25V
Y, Z (Any Mode, Note 7) . . . . . . . . . . . . . . . . . . . . . . . . . -12.5V to +12.5V
RA, RB (non-QFN Package) . . . . . . . . . . . . . . . . . . . -0.5V to (VCC + 0.5V)
RA, RB (QFN Package) . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VL + 0.5V)
Output Short Circuit Duration
Y, Z, RA, RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Resistance
JA (°C/W)
65
20 Ld SOIC Package (Note 9) . . . . . . . . . . . . . . . . . . . . .
20 Ld SSOP Package (Note 9) . . . . . . . . . . . . . . . . . . . .
60
40 Ld QFN Package (Note 8) . . . . . . . . . . . . . . . . . . . . .
32
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
7. One output at a time, IOUT 100mA for 10 mins.
8. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
9. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only), Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = +25°C (Note 10).
PARAMETER
MAX
(Note 17) UNITS
TEMP
(°C)
MIN
(Note 17)
TYP
Full
-
-
VCC
V
R = 50 (RS-422) ( Figure 1)
Full
2.5
3.1
-
V
R = 27 (RS-485) (Figure 1)
Full
2.2
2.7
5
V
VOD3
RD = 60, R = 375, VCM = -7V to 12V (Figure 1)
Full
2
2.7
5
V
VOD
R = 27 or 50 (Figure 1)
Full
-
0.01
0.2
V
SYMBOL
TEST CONDITIONS
DC CHARACTERISTICS - RS-485 DRIVER (485/232 = VCC)
Driver Differential VOUT (no load)
VOD1
Driver Differential VOUT (with load)
VOD2
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
Driver Common-Mode VOUT
VOC
R = 27 or 50 (Figure 1) (Note 14)
Full
-
-
3.1
V
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
VOC
R = 27 or 50 (Figure 1) (Note 14)
Full
-
0.01
0.2
V
Full
35
-
250
mA
VOUT = 12V
Full
-
-
150
µA
VOUT = -7V
Full
-150
-
-
µA
Driver Short-Circuit Current,
VOUT = High or Low
IOS
-7V (VY or VZ) 12V (Note 12)
Driver Three-State Output Leakage
Current (Y, Z)
IOZ
Outputs Disabled,
VCC = 0V or 5.5V
DC CHARACTERISTICS - RS-232 DRIVER (485/232 = 0V)
Driver Output Voltage Swing
VO
All TOUTS Loaded with 3k to Ground
Full
±5.0
+6/-7
-
V
Driver Output Short-Circuit Current
IOS
VOUT = 0V
Full
-60
25/-35
60
mA
DC CHARACTERISTICS - LOGIC PINS (i.e., DRIVER AND CONTROL INPUT PINS)
Input High Voltage
FN6201 Rev 4.00
June 9, 2014
VIH1
VL = VCC if QFN
Full
2
1.6
-
V
VIH2
VL = 3.3V (QFN Only)
Full
2
1.2
-
V
VIH3
VL = 2.5V (QFN Only)
Full
1.5
1
-
V
Page 7 of 27
ISL81387, ISL41387
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only), Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = +25°C (Note 10). (Continued)
PARAMETER
Input Low Voltage
Input Current
SYMBOL
TEMP
(°C)
TEST CONDITIONS
MIN
(Note 17)
TYP
MAX
(Note 17) UNITS
VIL1
VL = VCC if QFN
Full
-
1.4
0.8
V
VIL2
VL = 3.3V (QFN Only)
Full
-
1
0.7
V
VIL3
VL = 2.5V (QFN Only)
Full
-
0.8
0.5
V
IIN1
Except SLEW, RXEN (QFN), and SPB (QFN)
Full
-2
-
2
µA
IIN2
SLEW (Note 15), RXEN (QFN), and SPB (QFN)
Full
-25
-
25
µA
-7V VCM 12V, Full fail-safe
Full
-0.2
-
-0.04
V
VCM = 0V
25
-
35
-
mV
VIN = 12V
Full
-
-
0.8
mA
VIN = -7V
Full
-0.64
-
-
mA
Full
15
-
-
k
DC CHARACTERISTICS - RS-485 RECEIVER INPUTS (485/232 = VCC)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Input Current (A, B)
Receiver Input Resistance
V TH
V TH
IIN
RIN
VCC = 0V or 4.5V to 5.5V
-7V VCM 12V, VCC = 0 (Note 13), or
4.5V VCC 5.5V
DC CHARACTERISTICS - RS-232 RECEIVER INPUTS (485/232 = GND)
Receiver Input Voltage Range
VIN
Full
-25
-
25
V
Receiver Input Threshold
VIL
Full
-
1.4
0.8
V
VIH
Full
2.4
1.9
-
V
Receiver Input Hysteresis
V TH
25
-
0.5
-
V
Receiver Input Resistance
RIN
Full
3
5
7
k
VIN = 15V, VCC Powered up (Note 13)
DC CHARACTERISTICS - RECEIVER OUTPUTS (485 OR 232 MODE)
Receiver Output High Voltage
VOH1
IO = -2mA (VL = VCC if QFN)
Full
3.5
4.6
-
V
VOH2
IO = -650A, VL = 3V (QFN Only)
Full
2.6
2.9
-
V
VOH3
IO = -500A, VL = 2.5V (QFN Only)
Full
2
2.4
-
V
Receiver Output Low Voltage
VOL
IO = 3mA
Full
-
0.1
0.4
V
Receiver Short-Circuit Current
IOSR
0V VO VCC
Full
7
-
85
mA
Receiver Three-State Output
Current
IOZR
Output Disabled, 0V VO VCC (or VL for QFN)
Full
-
-
10
µA
ICC232
485/232 = 0V, ON = VCC
Full
-
3.7
7
mA
ICC485
485/232 = VCC, ON = VCC
Full
-
1.6
5
mA
ISHDN232
ON = DEN = RXEN = 0V
(RXEN = SPB = VCC if QFN)
Full
-
5
30
µA
ISHDN485
ON = DEN = RXEN = SLEW = 0V
(RXEN = VCC, SPB = 0V if QFN)
Full
-
35
60
µA
Bus Pins (A, B, Y, Z) Any Mode
Human Body Model
25
-
15
-
kV
All Other Pins
Human Body Model
25
-
4
-
kV
POWER SUPPLY CHARACTERISTICS
No-Load Supply Current (Note 11)
Shutdown Supply Current
ESD CHARACTERISTICS
RS-232 DRIVER and RECEIVER SWITCHING CHARACTERISTICS (485/232 = 0V, ALL VERSIONS AND SPEEDS)
Driver Output Transition Region
Slew Rate
FN6201 Rev 4.00
June 9, 2014
SR
RL = 3kMeasured From 3V to
-3V or -3V to 3V
CL 15pF
Full
-
18
30
V/µs
CL 2500pF
Full
4
12
-
V/µs
Page 8 of 27
ISL81387, ISL41387
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only), Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = +25°C (Note 10). (Continued)
PARAMETER
Driver Output Transition Time
Driver Propagation Delay
TEMP
(°C)
MIN
(Note 17)
TYP
RL = 3k, CL = 2500pF, 10% to 90%
Full
0.22
1.2
3.1
µs
RL = 3kCL = 1000pF (Figure 6)
Full
-
1
2
µs
Full
-
1.2
2
µs
tDPHL - tDPLH (Figure 6)
Full
-
240
400
ns
25
-
800
-
ns
RL = 5kMeasured at VOUT = ±3V
25
-
500
-
ns
VOUT = ±3.0V (Note 16)
25
-
20
-
µs
SYMBOL
tr, tf
tDPHL
TEST CONDITIONS
tDPLH
Driver Propagation Delay Skew
tDSKEW
Driver Enable Time
tDEN
Driver Disable Time
tDDIS
Driver Enable Time from Shutdown
tDENSD
MAX
(Note 17) UNITS
Driver Maximum Data Rate
DRD
RL = 3kCL = 1000pF, One Transmitter
Switching
Full
460
650
-
kbps
Receiver Propagation Delay
tRPHL
CL = 15pF (Figure 7)
Full
-
50
120
ns
Full
-
40
120
ns
tRPHL - tRPLH (Figure 7)
Full
-
10
40
ns
CL = 15pF
Full
0.46
2
-
Mbps
15
30
50
ns
tRPLH
Receiver Propagation Delay Skew
Receiver Maximum Data Rate
tRSKEW
DRR
RS-485 DRIVER SWITCHING CHARACTERISTICS (FAST DATA RATE (20Mbps), 485/232 = VCC, SLEW = VCC, ALL VERSIONS)
Driver Differential Input to Output
Delay
tDLH, tDHL
RDIFF = 54, CL = 100pF (Figure 2)
Full
Driver Output Skew
tSKEW
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
0.5
10
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54, CL = 100pF (Figure 2)
Full
3
11
20
ns
Full
-
27
60
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC (Figure 3)
Driver Enable to Output High
tZH
CL = 100pF, SW = GND (Figure 3)
Full
-
24
60
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC (Figure 3)
Full
-
31
60
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 3)
Full
-
24
60
ns
Driver Enable from Shutdown to
Output Low
tZL(SHDN)
RL = 500, CL = 100pF, SW = VCC (Figure 3)
(Note 16)
Full
-
65
250
ns
Driver Enable from Shutdown to
Output High
tZH(SHDN)
RL = 500, CL = 100pF, SW = GND (Figure 3)
(Note 16)
Full
-
152
250
ns
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
30
-
Mbps
Driver Maximum Data Rate
fMAX
RS-485 DRIVER SWITCHING CHARACTERISTICS (MEDIUM DATA RATE (460kbps), 485/232 = VCC, SLEW = 0V, SPB = VCC (QFN Only), ALL VERSIONS)
Driver Differential Input to Output
Delay
tDLH, tDHL
RDIFF = 54, CL = 100pF (Figure 2)
Full
200
490
1000
ns
Driver Output Skew
tSKEW
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
110
400
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54, CL = 100pF (Figure 2)
Full
300
600
1100
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC (Figure 3)
Full
-
30
300
ns
Driver Enable to Output High
tZH
CL = 100pF, SW = GND (Figure 3)
Full
-
128
300
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC (Figure 3)
Full
-
31
60
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 3)
Full
-
24
60
ns
Driver Enable from Shutdown to
Output Low
tZL(SHDN)
RL = 500, CL = 100pF, SW = VCC (Figure 3)
(Note 16)
Full
-
65
500
ns
Driver Enable from Shutdown to
Output High
tZH(SHDN)
RL = 500, CL = 100pF, SW = GND (Figure 3)
(Note 16)
Full
-
255
500
ns
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
2000
-
kbps
Driver Maximum Data Rate
FN6201 Rev 4.00
June 9, 2014
fMAX
Page 9 of 27
ISL81387, ISL41387
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1µF, VL = VCC (for QFN only), Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = +25°C (Note 10). (Continued)
PARAMETER
SYMBOL
TEMP
(°C)
TEST CONDITIONS
MIN
(Note 17)
TYP
MAX
(Note 17) UNITS
RS-485 DRIVER SWITCHING CHARACTERISTICS (SLOW DATA RATE (115kbps, QFN ONLY), 485/232 = VCC, SLEW = SPB = GND)
Driver Differential Input to Output
Delay
tDLH, tDHL
RDIFF = 54, CL = 100pF (Figure 2)
Full
800
1500
2500
ns
Driver Output Skew
tSKEW
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
350
1250
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54, CL = 100pF (Figure 2)
Full
1000
2000
3100
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC (Figure 3)
Full
-
32
600
ns
Driver Enable to Output High
tZH
CL = 100pF, SW = GND (Figure 3)
Full
-
300
600
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC (Figure 3)
Full
-
31
60
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 3)
Full
-
24
60
ns
Driver Enable from Shutdown to
Output Low
tZL(SHDN)
RL = 500, CL = 100pF, SW = VCC (Figure 3)
(Note 16)
Full
-
65
800
ns
Driver Enable from Shutdown to
Output High
tZH(SHDN)
RL = 500, CL = 100pF, SW = GND (Figure 3)
(Note 16)
Full
-
420
800
ns
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
800
-
kbps
Driver Maximum Data Rate
fMAX
RS-485 RECEIVER SWITCHING CHARACTERISTICS (485/232 = VCC, ALL VERSIONS AND SPEEDS)
Receiver Input to Output Delay
tPLH, tPHL
(Figure 4)
Full
20
50
90
ns
Receiver Skew | tPLH - tPHL |
tSKEW
(Figure 4)
Full
-
3
10
ns
Receiver Maximum Data Rate
fMAX
Full
-
40
-
Mbps
RECEIVER ENABLE/DISABLE CHARACTERISTICS (ALL MODES AND VERSIONS AND SPEEDS)
Receiver Enable to Output Low
tZL
CL = 15pF, SW = VCC (Figure 5)
Full
-
22
60
ns
Receiver Enable to Output High
tZH
CL = 15pF, SW = GND (Figure 5)
Full
-
23
60
ns
Receiver Disable from Output Low
tLZ
CL = 15pF, SW = VCC (Figure 5)
Full
-
24
60
ns
Receiver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 5)
Full
-
25
60
ns
Receiver Enable from Shutdown to
Output Low
tZLSHDN
CL = 15pF, SW = VCC (Figure 5)
(Note 16)
RS-485 Mode
Full
-
260
700
ns
RS-232 Mode
25
-
35
-
ns
Receiver Enable from Shutdown to
Output High
tZHSHDN
CL = 15pF, SW = GND (Figure 5)
(Note 16)
RS-485 Mode
Full
-
260
700
ns
RS-232 Mode
25
-
25
-
ns
NOTES:
10. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise
specified.
11. Supply current specification is valid for loaded drivers when DEN = 0V.
12. Applies to peak current. See “Typical Performance Curves” beginning on page 18 for more information.
13. RIN defaults to RS-485 mode (>15k) when the device is unpowered (VCC = 0V), or in SHDN, regardless of the state of the 485/232 pin.
14. VCC 5.25V.
15. The Slew pin has a pull-up resistor that enables only when in RS-485 mode (485/232 = VCC).
16. ON, RXEN, and DEN all simultaneously switched Low-to-High.
17. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
FN6201 Rev 4.00
June 9, 2014
Page 10 of 27
ISL81387, ISL41387
Test Circuits and Waveforms
R
DEN
VCC
DY
Y
RD
D
VOD
Z
+
-
VCM
VOC
R
FIGURE 1. RS-485 DRIVER VOD AND VOC TEST CIRCUIT
3V
DY
1.5V
1.5V
0V
tPLH
VCC
CL = 100pF
DEN
DY
tPHL
VOH
50%
OUT (Z)
50%
VOL
Y
tPHL
RDIFF
D
Z
CL = 100pF
tPLH
VOH
OUT (Y)
50%
SIGNAL
GENERATOR
50%
VOL
tDLH
tDHL
90%
DIFF OUT (Z - Y)
0V
10%
+VOD
90%
0V
10%
tR
-VOD
tF
SKEW = |tPLH (Y OR Z) - tPHL (Z OR Y)|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DEN
DY
SIGNAL
GENERATOR
Y
500
VCC
D
SW
Z
GND
ENABLED
DEN
1.5V
3V
1.5V
0V
CL
tZH
tZH(SHDN)
FOR SHDN TESTS, SWITCH ON AND DEN L- H SIMULTANEOUSLY
PARAMETER
OUTPUT
tHZ
Y/Z
tLZ
Y/Z
tZH
Y/Z
tZL
RXEN
OUT (Y, Z)
DY
SW
CL (pF)
X
0/1
GND
15
X
1/0
VCC
15
X
0/1
GND
100
Y/Z
X
1/0
VCC
100
tZH(SHDN)
Y/Z
0
0/1
GND
100
tZL(SHDN)
Y/Z
0
1/0
VCC
100
FIGURE 3A. TEST CIRCUIT
OUTPUT HIGH
tHZ
VOH - 0.5V VOH
2.3V
0V
tZL
tZL(SHDN)
OUT (Y, Z)
tLZ
VCC
2.3V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. RS-485 DRIVER ENABLE AND DISABLE TIMES
FN6201 Rev 4.00
June 9, 2014
Page 11 of 27
ISL81387, ISL41387
Test Circuits and Waveforms (Continued)
+1.5V
RXEN
VCC
15pF
A
0V
R
B
B
RA
0V
0V
-1.5V
tPLH
tPHL
VCC
SIGNAL
GENERATOR
RA
1.5V
FIGURE 4A. TEST CIRCUIT
1.5V
0V
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RS-485 RECEIVER PROPAGATION DELAY
RXEN
A
R
SIGNAL
GENERATOR
1k
RA
VCC
SW
B
GND
ENABLED
RXEN
1.5V
3V
1.5V
15pF
0V
tZH
FOR SHDN TESTS, SWITCH ON AND RXEN L- H SIMULTANEOUSLY
tZH(SHDN)
OUTPUT HIGH
RA
tHZ
VOH - 0.5V VOH
1.5V
0V
PARAMETER
DEN
B
SW
tHZ
X
+1.5V
GND
tLZ
X
-1.5V
VCC
tZL
tZL(SHDN)
tZH
X
+1.5V
GND
RA
tZL
X
-1.5V
VCC
tZH(SHDN)
0
+1.5V
GND
tZL(SHDN)
0
-1.5V
VCC
tLZ
VCC
1.5V
VOL + 0.5V V
OUTPUT LOW
OL
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5A. TEST CIRCUIT
FIGURE 5. RS-485 RECEIVER ENABLE AND DISABLE TIMES
3V
DEN
VCC
DY, Z
DY,Z
D
1.5V
1.5V
CL
Y, Z
0V
tDPHL
RL
SIGNAL
GENERATOR
tDPLH
VO+
OUT (Y, Z)
0V
0V
VO-
SKEW = |tDPHL - tDPLH|
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6A. TEST CIRCUIT
FIGURE 6. RS-232 DRIVER PROPAGATION DELAY
3V
RXEN
VCC
A, B
A, B
R
1.3V
1.7V
0V
CL = 15pF
RA, RB
tRPLH
tRPHL
2.4V
RA, RB
SIGNAL
GENERATOR
0.8V
VOL
SKEW = |tRPHL - tRPLH|
FIGURE 7A. TEST CIRCUIT
VOH
FIGURE 7B. MEASUREMENT POINTS
FIGURE 7. RS-232 RECEIVER PROPAGATION DELAY
FN6201 Rev 4.00
June 9, 2014
Page 12 of 27
ISL81387, ISL41387
Detailed Description
Because of the one driver per bus limitation, RS-422 networks
use a two bus, full duplex structure for bidirectional
communication, and the Rx inputs and Tx outputs (no tri-state
required) connect to different busses, as shown in Figure 9. Tx
and Rx enables aren’t required, so connect RXEN and DEN to VCC
through a 1k resistor.
The ISL81387, ISL41387 port supports dual protocols:
RS-485, RS-422, and RS-232. RS-485 and RS-422 are
differential (balanced) data transmission standards for use in
high speed (up to 20Mbps) networks, or long haul and noisy
environments. The differential signalling, coupled with RS-485’s
requirement for extended common mode range (CMR) of +12V
to -7V make these transceivers extremely tolerant of ground
potential differences, as well as voltages induced in the cable by
external fields. Both of these effects are real concerns when
communicating over the RS-485, RS-422 maximum distance of
4000’ (1220m). It is important to note that the ISL81387,
ISL41387 don’t follow the RS-485 convention whereby the
inverting I/O is labelled “B/Z”, and the non-inverting I/O is “A/Y”.
Thus, in the following application diagrams, the ISL81387,
ISL41387 A/Y (B/Z) pins connect to the B/Z (A/Y) pins of the
generic RS-485, RS-422 ICs.
Conversely, RS-485 is a true multipoint standard, which allows
up to 32 devices (any combination of drivers- must be tri-statable
- and receivers) on each bus. Now bidirectional communication
takes place on a single bus, so the Rx inputs and Tx outputs of a
port connect to the same bus lines, as shown in Figure 8. A port
set to RS-485, RS-422 mode includes one Rx and one Tx. See
application note AN1378 for details on implementing a three pin,
selectable RS-232/ half duplex RS-485 port.
RS-232 is a point-to-point, singled ended (signal voltages
referenced to GND) communication protocol targeting fairly short
( VCC
10µ
2
RS-485, DEN = GND, RXEN, RXEN = X, ON = VCC
500
VL VCC
RS-485, SLEW, SPB, RXEN = GND
10n
RS-485, FULL DUPLEX, DEN = VCC, RXEN, RXEN, ON = X
TEMPERATURE (°C)
FIGURE 17. RS-485, DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
IL (A)
50
25
FIGURE 16. RS-485, DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
150
1n
0
-25
TEMPERATURE (°C)
FIGURE 15. RS-485, DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
-150
RDIFF = 54
3.1
0
2.0
SPB = VL
RS-232 IL
2.5
SPB = GND
RS-485 IL
3.0
3.5
VL (V)
4.0
4.5
5.0
FIGURE 20. VCC AND VL SHDN SUPPLY CURRENTS vs VL VOLTAGE
(QFN ONLY)
Page 19 of 27
ISL81387, ISL41387
Typical Performance Curves
1700
VCC = VL = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
400
RDIFF = 54, CL = 100pF
RDIFF = 54, CL = 100pF
350
|tPHLZ - tPLHY|
300
1600
tDHL
1550
tDLH
200
150
1500
100
tDHL
1450
|tPLHZ - tPHLY|
250
SKEW (ns)
PROPAGATION DELAY (ns)
1650
|tDLH - tDHL|
50
1400
-40
0
-25
50
25
75
85
-40
0
-25
TEMPERATURE (°C)
75
85
75
85
FIGURE 22. RS-485, DRIVER SKEW vs TEMPERATURE
(SLOW DATA RATE, QFN ONLY)
560
120
RDIFF = 54, CL = 100pF
RDIFF = 54, CL = 100pF
100
540
530
|tPHLZ - tPLHY|
80
SKEW (ns)
PROPAGATION DELAY (ns)
50
TEMPERATURE (°C)
FIGURE 21. RS-485, DRIVER PROPAGATION DELAY vs
TEMPERATURE (SLOW DATA RATE, QFN ONLY)
550
25
520
tDHL
510
tDLH
500
60
|tPLHZ - tPHLY|
40
tDHL
490
20
480
|tDLH - tDHL|
470
-40
-25
0
50
25
75
0
-40
85
0
25
TEMPERATURE (°C)
-25
TEMPERATURE (°C)
FIGURE 23. RS-485, DRIVER PROPAGATION DELAY vs
TEMPERATURE (MEDIUM DATA RATE)
FIGURE 24. RS-485, DRIVER SKEW vs TEMPERATURE
(MEDIUM DATA RATE)
2.5
RDIFF = 54, CL = 100pF
RDIFF = 54, CL = 100pF
2.0
35
|tDLH - tDHL|
SKEW (ns)
PROPAGATION DELAY (ns)
40
50
tDHL
30
tDLH
1.5
1.0
|tPLHZ - tPHLY|
25
20
-40
0.5
-25
0
25
50
TEMPERATURE (°C)
FIGURE 25. RS-485, DRIVER PROPAGATION DELAY vs
TEMPERATURE (FAST DATA RATE)
FN6201 Rev 4.00
June 9, 2014
75
85
|tPHLZ - tPLHY|
0
-40
-25
0
25
50
75
85
TEMPERATURE (°C)
FIGURE 26. RS-485, DRIVER SKEW vs TEMPERATURE (FAST DATA
RATE)
Page 20 of 27
ISL81387, ISL41387
RA
5
4
3
2
Y
Z
1
0
RA
0
5
4
3
2
1
Z
Y
0
TIME (400ns/DIV)
RA
0
5
4
3
2
1
RECEIVER OUTPUT (V)
0
DRIVER INPUT (V)
5
5
FIGURE 28. RS-485, DRIVER AND RECEIVER WAVEFORMS, HIGH TO
LOW (SLOW DATA RATE, QFN ONLY)
DRIVER OUTPUT (V)
DRIVER OUTPUT (V)
RECEIVER OUTPUT (V)
FIGURE 27. RS-485, DRIVER AND RECEIVER WAVEFORMS, LOW TO
HIGH (SLOW DATA RATE, QFN ONLY)
DY
Y
Z
0
RDIFF = 60, CL = 100pF
DY
5
5
4
3
2
1
Z
Y
0
3
2
Y
Z
1
0
TIME (10ns/DIV)
FIGURE 31. RS-485, DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH (FAST DATA RATE)
FN6201 Rev 4.00
June 9, 2014
RECEIVER OUTPUT (V)
DRIVER OUTPUT (V)
5
4
5
0
RA
0
FIGURE 30. RS-485, DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW (MEDIUM DATA RATE)
DRIVER INPUT (V)
RECEIVER OUTPUT (V)
DRIVER OUTPUT (V)
5
0
TIME (200ns/DIV)
FIGURE 29. RS-485, DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH (MEDIUM DATA RATE)
DY
5
RA
0
TIME (200ns/DIV)
RDIFF = 60, CL = 100pF
0
5
TIME (400ns/DIV)
RDIFF = 60, CL = 100pF
5
DRIVER INPUT (V)
0
DY
RDIFF = 60, CL = 100pF
DY
5
0
RA
0
5
DRIVER INPUT (V)
5
RDIFF = 60, CL = 100pF
DRIVER INPUT (V)
0
RECEIVER OUTPUT (V)
5
DRIVER INPUT (V)
RDIFF = 60, CL = 100pF
DY
VCC = VL = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
DRIVER OUTPUT (V)
DRIVER OUTPUT (V)
RECEIVER OUTPUT (V)
Typical Performance Curves
5
4
3
2
1
Z
Y
0
TIME (10ns/DIV)
FIGURE 32. RS-485, DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW (FAST DATA RATE)
Page 21 of 27
ISL81387, ISL41387
Typical Performance Curves
VCC = VL = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
7.5
VOUT+
5.0
2.5
ALL TOUTS LOADED WITH 3k TO GND
500kbps
0
1 TRANSMITTER AT 250kbps OR 500kbps,
OTHER TRANSMITTER AT 30kbps
-2.5
500kbps
-5.0
-7.5
VOUT 250kbps
0
1000
2000
3000
4000
TRANSMITTER OUTPUT VOLTAGE (V)
250kbps
RS-232 REGION OF NONCOMPLIANCE
TRANSMITTER OUTPUT VOLTAGE (V)
7.5
5.0
VOUT+
2.5
OUTPUTS STATIC
ALL TOUTS LOADED WITH 3k TO GND
0
-2.5
-5.0
VOUT -
-7.5
-40
5000
0
25
TEMPERATURE (°C)
-25
LOAD CAPACITANCE (pF)
FIGURE 33. RS-232, TRANSMITTER OUTPUT VOLTAGE vs LOAD
CAPACITANCE
50
75
85
FIGURE 34. RS-232, TRANSMITTER OUTPUT VOLTAGE vs
TEMPERATURE
TRANSMITTER OUTPUT CURRENT (mA)
40
30
5
Y or Z = LOW
20
0
10
0
CL = 3500pF, 1 CHANNEL SWITCHING
DY
5
VOUT SHORTED TO GND
0
Y/A
-10
-5
-20
5
Y or Z = HIGH
-30
0
-40
-40
-25
0
25
TEMPERATURE (°C)
50
75
RA
85
FIGURE 35. RS-232, TRANSMITTER SHORT CIRCUIT CURRENT vs
TEMPERATURE
2s/DIV
FIGURE 36. RS-232, TRANSMITTER AND RECEIVER WAVEFORMS AT
250kbps
60
0
RECEIVER + DUTY CYCLE (%)
5
VIN = ±5V
CL = 1000pF, 1 CHANNEL SWITCHING
DY
5
0
Y/A
-5
5
RA
0
FULL TEMP RANGE
58
56
54
SR IN = 15V/µs
52
SR IN = 100V/µs
50
48
1s/DIV.
50
500
1000
1500
2000
DATA RATE (kbps)
FIGURE 37. RS-232, TRANSMITTER AND RECEIVER WAVEFORMS AT
500kbps
FN6201 Rev 4.00
June 9, 2014
FIGURE 38. RS-232, RECEIVER OUTPUT +DUTY CYCLE vs DATA RATE
Page 22 of 27
ISL81387, ISL41387
Typical Performance Curves
800
700
2 TRANSMITTERS AT +25°C
600
1 TRANSMITTER AT +25°C
500
400
300
200
1 TRANSMITTER AT +85°C
2 TRANSMITTERS AT +85°C
100
100
1000
2000
3000
LOAD CAPACITANCE (pF)
4000
VOUT+
5.0
+25°C
+85°C
2.5
2 TRANSMITTERS SWITCHING
0
ALL TOUTS LOADED WITH 5k TO GND, CL = 1000pF
-2.5
+85°C
-5.0
VOUT -
+25°C
-7.5
5000
0
100
200
300
400
500
600
700
RS-232 REGION OF NONCOMPLIANCE
ALL TOUTS LOADED WITH 5k TO GND
900
DATA RATE (kbps)
7.5
VOUT 4V
1000
TRANSMITTER OUTPUT VOLTAGE (V)
1100
VCC = VL = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
800
DATA RATE (kbps)
FIGURE 39. RS-232, TRANSMITTER MAXIMUM DATA RATE vs LOAD
CAPACITANCE
FIGURE 40. RS-232, TRANSMITTER OUTPUT VOLTAGE vs DATA RATE
100
450
2 TRANSMITTERS SWITCHING
400
ALL TOUTS LOADED WITH 3k TO GND, CL = 1000pF
FAST
10
JITTER (%)
350
SKEW (ns)
MED
SLOW
+85°C
300
250
1
+25°C
200
150
50
150
250
350
450
550
650
DOUBLE TERM’ED WITH 121
0.1
750
32 100
200
300
400
DATA RATE (kbps)
600
700
800
900 1000
DATA RATE (kbps)
FIGURE 41. RS-232, TRANSMITTER SKEW vs DATA RATE
FIGURE 42. RS-485, TRANSMITTER JITTER vs DATA RATE WITH 2000’
CAT-5 CABLE
100
100
SLOW
SLOW
MED
MED
10
FAST
1
DOUBLE TERM’ED WITH 121
0.1
32 100
200
300
400
500
600
700
800
900 1000
DATA RATE (kbps)
FIGURE 43. RS-485, TRANSMITTER JITTER vs DATA RATE WITH 1000’
CAT-5 CABLE
FN6201 Rev 4.00
June 9, 2014
JITTER (%)
10
JITTER (%)
500
FAST
1
DOUBLE TERM’ED WITH 121
0.1
32 100
200
300
400
500
600
700
800
900 1000
DATA RATE (kbps)
FIGURE 44. RS-485, TRANSMITTER JITTER vs DATA RATE WITH 350’
CAT-5 CABLE
Page 23 of 27
ISL81387, ISL41387
Die Characteristics
TRANSISTOR COUNT:
SUBSTRATE AND QFN THERMAL PAD POTENTIAL
(POWERED UP):
2490
PROCESS:
BiCMOS
GND
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that
you have the latest revision.
DATE
REVISION
May 12, 2014
FN6201.4
CHANGE
Reformatted entire datasheet to Intersil lastest template. Added Revision History
Page 1:
- Changed 20µA to 35µA in paragraph 4.
- Added Related Literature
Updated Note 17
Figure 14 added QFN ONLY to figure name.
Figure 19 Removed RS-232 from figure name.
Figure 20 Changed Y-axis units from mA to µA.
Figures 23, 24, 29, and 30 removed QFN ONLY from the Figure name.
Replaced POD on page 26 to latest revision.
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support
© Copyright Intersil Americas LLC 2005-2014. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN6201 Rev 4.00
June 9, 2014
Page 24 of 27
ISL81387, ISL41387
Package Outline Drawing
L40.6x6
40 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE
Rev 3, 10/06
4X 4.5
6.00
36X 0.50
A
B
31
6
PIN 1
INDEX AREA
6
PIN #1 INDEX AREA
40
30
1
6.00
4 . 10 ± 0 . 15
21
10
0.15
(4X)
11
20
TOP VIEW
0.10 M C A B
40X 0 . 4 ± 0 . 1
4 0 . 23 +0 . 07 / -0 . 05
BOTTOM VIEW
SEE DETAIL "X"
0.10 C
0 . 90 ± 0 . 1
( 5 . 8 TYP )
(
C
BASE PLANE
SEATING PLANE
0.08 C
SIDE VIEW
4 . 10 )
( 36X 0 . 5 )
C
0 . 2 REF
5
( 40X 0 . 23 )
0 . 00 MIN.
0 . 05 MAX.
( 40X 0 . 6 )
DETAIL "X"
TYPICAL RECOMMENDED LAND PATTERN
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994.
3. Unless otherwise specified, tolerance : Decimal ± 0.05
4. Dimension b applies to the metallized terminal and is measured
between 0.15mm and 0.30mm from the terminal tip.
5. Tiebar shown (if present) is a non-functional feature.
6. The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 identifier may be
either a mold or mark feature.
FN6201 Rev 4.00
June 9, 2014
Page 25 of 27
ISL81387, ISL41387
Package Outline Drawing
M20.3
20 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE (SOIC)
Rev 3, 2/11
20
INDEX
AREA
7.60
7.40
1
2
10.65
10.00
0.25 (0.10) M B M
3
3
TOP VIEW
13.00
12.60
SEATING PLANE
2
2.65
2.35
5
0.75
1.27
BSC
0.49
0.35
7
0.25 (0.10) M
0.25
0.30
MAX
C A M B S
1.27
0.40
x 45°
8°
MAX
0.10 (0.004)
SIDE VIEW
0.32
0.23
DETAIL "X"
NOTES:
1. Dimensioning and tolerancing per ASME Y14.5M-1994.
(0.60)
1.27 BSC
2. Dimension does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.15mm (0.006 inch) per side.
20
(2.00)
3. Dimension does not include interlead lash or protrusions. Interlead
flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
4. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
(9.40mm)
5. Dimension is the length of terminal for soldering to a substrate.
6. Terminal numbers are shown for reference only.
7. The lead width as measured 0.36mm (0.14 inch) or greater above
the seating plane, shall not exceed a maximum value of 0.61mm
(0.024 inch)
8. Controlling dimension: MILLIMETER.
1
2
3
TYPICAL RECOMMENDED LAND PATTERN
FN6201 Rev 4.00
June 9, 2014
9. Dimensions in ( ) for reference only.
10. JEDEC reference drawing number: MS-013-AC.
Page 26 of 27
ISL81387, ISL41387
Shrink Small Outline Plastic Packages (SSOP)
N
INDEX
AREA
H
0.25(0.010) M
E
2
-A-
INCHES
3
0.25
0.010
SEATING PLANE
-C-
e
A1
B
0.25(0.010) M
L
A
D
A2
C
0.10(0.004)
C A M
(JEDEC MO-150-AE ISSUE B)
20 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE
GAUGE
PLANE
-B1
M20.209
B M
B S
SYMBOL
MIN
MAX
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication Number 95.
MAX
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
NOTES
9
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
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
NOTES:
MILLIMETERS
MIN
20
0 deg.
6
20
7
8 deg.
Rev. 3 11/02
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.
FN6201 Rev 4.00
June 9, 2014
Page 27 of 27
工商网监
湘ICP备2023018690号
