LTC1321/LTC1322/LTC1335
RS232/EIA562/RS485
Transceivers
U
DESCRIPTIO
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
LTC1321: 2-EIA562/RS232 Transceivers/2-RS485
Transceivers
LTC1322: 4-EIA562/RS232 Transceivers/2-RS485
Transceivers
LTC1335: 4-EIA562 Transceivers/2-RS485
Transceivers with OE
LTC1321/LTC1322 Have the Same Pinout as
SP301/SP302
LTC1335 Features Receiver Three-State Outputs
Low Supply Current: 1mA Typical
15µA Supply Current in Shutdown
120kBaud in EIA/TIA-562 or RS232 Mode
10MBaud in RS485/RS422 Mode
Self-Testing Capability in Loopback Mode
Power-Up/Down Glitch-Free Outputs
Driver Maintains High Impedance in Three-State,
Shutdown or With Power Off
Thermal Shutdown Protection
I/O Lines Can Withstand ±25V
Withstands Repeated 10kV ESD Pulses
U
APPLICATIONS
■
■
Low Power RS485/RS422/EIA562/RS232 Interface
Cable Repeater
Level Translator
The RS232/EIA562 transceivers operate to 120kbaud and
are in full compliance with EIA/TIA-562 specification. The
RS485 transceivers operate to 10Mbaud and are in full
compliance with RS485 and RS422 specifications. All
interface drivers feature short-circuit and thermal shutdown protection. An enable pin allows RS485 driver
outputs to be forced into high impedance which is maintained even when the outputs are forced beyond supply
rails or power is off. Both driver outputs and receiver
inputs feature ±10kV ESD protection. A loopback mode
connects the driver outputs back to the receiver inputs for
diagnostic self-test.
The LTC1321/LTC1322 can support RS232 voltage levels
when 6.5V ≤ VDD ≤ 10V and – 6.5V ≥ VEE ≥ – 10V. The
LTC1335 supports receiver output enable but not RS232
levels. A shutdown mode reduces the ICC supply current
to 15µA.
UO
■
The LTC1321/LTC1322/LTC1335 are low power CMOS
bidirectional transceivers, each featuring two reconfigurable
interface ports. Each can be configured as two RS485
differential ports, as two single-ended ports, or as one
RS485 differential port and one single-ended port. The
LTC1321/LTC1322 can provide RS232 or EIA562 compatible single-ended outputs; the LTC1335 provides EIA562
compatible outputs and additionally includes an output
enable pin, allowing the receiver logic level outputs to be
three-stated.
TYPICAL APPLICATI
VCC1
5V
RX OUT
DR ENABLE
DR IN
5V
5V
DR IN
DR IN
RX OUT
RX OUT
VEE1
–5V
24
1
22
2
3
RS485 INTERFACE
21
120Ω
20
19
18
LTC1322
16
120Ω
4
9
5
8
6
7
17
8
16
9
4000-FT 24-GAUGE TWISTED PAIR
5V
5V
0V
0V
EIA562 INTERFACE
24
1
15
11
10
17
7
6
19
LTC1322
18
3
22
2
23
15
10
5
20
14
11
4
21
13
12
12
13
VCC2
5V
RX OUT
DR ENABLE
DR IN
5V
5V
RX OUT
RX OUT
DR IN
DR IN
VEE2
–5V
1321/22/35 TA01
1
LTC1321/LTC1322/LTC1335
W W
W
AXI U
U
ABSOLUTE
RATI GS
Output Voltage
Drivers ................................................. – 25V to 25V
Receivers ............................... – 0.3V to (VCC + 0.3V)
Output Short-Circuit Duration ......................... Indefinite
Operating Temperature Range
LTC1321C/LTC1322C/LTC1335C ......... 0°C to 70°C
LTC1321I/LTC1322I/LTC1335I ......... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300°C
Supply Voltage
VCC .................................................................... 6.5V
VDD (LTC1321/LTC1322 Only) ........................... 10V
VEE ................................................................... – 10V
Input Voltage
Drivers ................................... – 0.3V to (VCC + 0.3V)
Receivers ............................................. – 25V to 25V
ON/OFF, LB, SEL1,
SEL2, OE ............................ – 0.3V to (VCC + 0.3V)
W
U
U
PACKAGE/ORDER I FOR ATIO
2 RS485 DRIVERS/RECEIVERS
2 EIA/TIA-562 DRIVERS/RECEIVERS
2 RS485 DRIVERS/RECEIVERS
4 EIA/TIA-562 DRIVERS/RECEIVERS
TOP VIEW
TOP VIEW
TOP VIEW
VDD
1
24 VCC
VDD
1
24 VCC
OE
1
B1
2
23 NC
B1
2
23 RB1
B1
2
24 VCC
23 RB1
A1
3
22 RA1
A1
3
22 RA1
A1
3
22 RA1
Z1
4
21 DE1
Z1
4
21 DZ1/DE1
Z1
4
21 DZ1/DE1
Y1
5
20 DY1
Y1
5
20 DY1
Y1
5
20 DY1
SEL1
6
19 LB
SEL1
6
19 LB
SEL1
6
19 LB
SEL2
7
18 ON/OFF
SEL2
7
18 ON/OFF
SEL2
7
18 ON/OFF
Y2
8
17 DY2
Y2
8
17 DY2
Y2
8
17 DY2
Z2
9
16 DE2
Z2
9
16 DZ2 /DE2
Z2
9
16 DZ2 /DE2
A2 10
15 RA2
A2 10
15 RA2
A2 10
15 RA2
B2 11
14 NC
B2 11
14 RB2
B2 11
14 RB2
GND 12
13 VEE
GND 12
13 VEE
GND 12
13 VEE
N PACKAGE
24-LEAD PLASTIC DIP
S PACKAGE
24-LEAD PLASTIC SOL
N PACKAGE
24-LEAD PLASTIC DIP
S PACKAGE
24-LEAD PLASTIC SOL
N PACKAGE
24-LEAD PLASTIC DIP
S PACKAGE
24-LEAD PLASTIC SOL
TJMAX = 125°C, θJA = 75°C/W (N)
TJMAX = 125°C, θJA = 85°C/W (S)
TJMAX = 125°C, θJA = 75°C/W (N)
TJMAX = 125°C, θJA = 85°C/W (S)
TJMAX = 125°C, θJA = 75°C/W (N)
TJMAX = 125°C, θJA = 85°C/W (S)
ORDER PART
NUMBER
ORDER PART
NUMBER
ORDER PART
NUMBER
LTC1321CN
LTC1321CS
LTC1321IN
LTC1321IS
LTC1322CN
LTC1322CS
LTC1322IN
LTC1322IS
LTC1335CN
LTC1335CS
LTC1335IN
LTC1335IS
Consult factory for Military grade parts.
2
2 RS485 DRIVERS/RECEIVERS
4 EIA/TIA-562 DRIVERS/RECEIVERS
LTC1321/LTC1322/LTC1335
DC ELECTRICAL CHARACTERISTICS
VCC = VDD (LTC1321/LTC1322) = 5V ±5%, VEE = – 5V ±5% (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RS485 Driver (SEL1 = SEL2 = HIGH)
VOD1
Differential Driver Output Voltage (Unloaded)
IO = 0
●
VOD2
Differential Driver Output Voltage (With Load)
Figure 1, R = 50Ω (RS422)
Figure 1, R = 27Ω (RS485)
●
●
5
V
5
5
V
V
∆VOD
Change in Magnitude of Driver Differential
Output Voltage for Complementary Output States
Figure 1, R = 27Ω or R = 50Ω
●
0.2
V
VOC
Driver Common-Mode Output Voltage
Figure 1, R = 27Ω or R = 50Ω
∆VOC
Change in Magnitude of Driver Common-Mode
Output Voltage for Complementary Output States
Figure 1, R = 27Ω or R = 50Ω
●
3
V
●
0.2
V
IOSD
Driver Short-Circuit Current
– 7V ≤ VO ≤ 12V, VO = HIGH
– 7V ≤ VO ≤ 12V, VO = LOW (Note 4)
●
●
250
250
mA
mA
IOZD
Three-State Output Current (Y, Z)
– 7V ≤ VO ≤ 12V
●
±500
µA
2.0
1.5
35
10
±5
EIA/TIA-562 Driver (SEL1 = SEL2 = LOW)
VO
Output Voltage Swing
Figure 4, RL = 3k, Positve
Figure 4, RL = 3k, Negative
●
●
IOSD
Output Short-Circuit Current
VO = 0V
●
3.7
– 3.7
4.2
– 4.3
±11
V
V
±60
mA
Driver Inputs and Control Inputs
VIH
Input High Voltage
D, DE, ON/OFF, SEL1, SEL2, LB
OE (LTC1335)
●
●
VIL
Input Low Voltage
D, DE, ON/OFF, SEL1, SEL2, LB
OE (LTC1335)
●
●
IIN
Input Current
D, SEL1, SEL2
DE, ON/OFF, LB
OE (LTC1335)
●
●
●
2
2
V
V
–4
4
0.8
0.8
V
V
±10
– 15
15
µA
µA
µA
0.2
0.3
V
V
RS485 Receiver (SEL1 = SEL2 = HIGH)
VTH
Differential Input Threshold Voltage
– 7V ≤ VCM ≤ 7V, Commercial
– 7V ≤ VCM ≤ 7V, Industrial
●
●
∆VTH
Input Hysteresis
VCM = 0V
●
IIN
Input Current (A, B)
– 7V ≤ VIN ≤ 12V
●
RIN
Input Resistance
– 7V ≤ VIN ≤ 12V
●
12
24
Input Low Threshold
Input High Threshold
●
●
0.8
1.1
1.7
2.4
V
V
●
0.1
0.6
1.0
V
3
5
7
3.5
4.6
– 0.2
– 0.3
70
mV
±1
mA
kΩ
EIA/TIA-562 Receiver (SEL1 = SEL2 = LOW)
VTH
Receiver Input Voltage Threshold
∆VTH
Receiver Input Hysteresis
RIN
Receiver Input Resistance
VIN = ±10V
kΩ
Receiver Output
VOH
Receiver Output High Voltage
IO = – 3mA, VIN = 0V, SEL1 = SEL2 = LOW
●
VOL
Receiver Output Low Voltage
IO = 3mA, VIN = 3V, SEL1 = SEL2 = LOW
●
IOSR
Short-Circuit Current
0V ≤ VO ≤ VCC
●
IOZR
Three-State Output Current
ON/OFF = 0V
OE = VCC (LTC1335)
●
●
0.2
7
V
0.4
V
85
mA
±10
±10
µA
µA
3
LTC1321/LTC1322/LTC1335
DC ELECTRICAL CHARACTERISTICS
VCC = VDD (LTC1321/LTC1322) = 5V ±5%, VEE = – 5V ±5% (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Currents
ICC
VCC Supply Current
No Load (SEL1 = SEL2 = HIGH)
Shutdown, ON/OFF = 0V
●
●
1000
15
2000
50
µA
µA
IDD
VDD Supply Current (LTC1321/LTC1322)
No Load (SEL1 = SEL2 = LOW)
Shutdown, ON/OFF = 0V
●
●
300
0.1
1000
50
µA
µA
IEE
VEE Supply Current
No Load (SEL1 = SEL2 = HIGH)
Shutdown, ON/OFF = 0V
●
●
– 1000
– 0.1
– 2000
– 50
µA
µA
MIN
TYP
MAX
AC
DC ELECTRICAL CHARACTERISTICS
VCC = VDD (LTC1321/LTC1322) = 5V ±5%, VEE = – 5V ±5% (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
UNITS
EIA/TIA-562 Mode (SEL1 = SEL2 = LOW)
SR
Slew Rate
Figure 4, RL = 3k, CL = 15pF
Figure 4, RL = 3k, CL = 1000pF
●
●
14
7
30
4
V/µs
V/µs
0.22
1.9
3.1
µs
tT
Transition Time
Figure 4, RL = 3k, CL = 2500pF
●
t PLH
Driver Input to Output
Figures 4,10, RL = 3k, CL = 15pF
●
0.6
4
µs
t PHL
Driver Input to Output
Figures 4,10, RL = 3k, CL = 15pF
●
0.6
4
µs
t PLH
Receiver Input to Output
Figures 5,11
●
0.3
6
µs
t PHL
Receiver Input to Output
Figures 5,11
●
0.4
6
µs
RS485 Mode (SEL1 = SEL2 = HIGH)
t PLH
Driver Input to Output
Figures 2,7, RL = 54Ω, CL = 100pF
●
20
40
70
ns
t PHL
Driver Input to Output
Figures 2,7, RL = 54Ω, CL = 100pF
●
20
40
70
ns
t SKEW
Driver Output to Output
Figures 2,7, RL = 54Ω, CL = 100pF
●
5
15
ns
t r, tf
Driver Rise or Fall Time
Figures 2,7, RL = 54Ω, CL = 100pF
●
3
15
40
ns
t ZL
Driver Enable to Output Low
Figures 3,8, CL = 100pF, S1 Closed
●
50
90
ns
t ZH
Driver Enable to Output High
Figures 3,8, CL = 100pF, S2 Closed
●
50
90
ns
tLZ
Driver Disable from Low
Figures 3,8, CL = 15pF, S1 Closed
●
50
90
ns
tHZ
Driver Disable from High
Figures 3,8, CL = 15pF, S2 Closed
●
60
90
ns
t PLH
Receiver Input to Output
Figures 2,9, RL = 54Ω, CL = 100pF
●
20
60
140
ns
t PHL
Receiver Input to Output
Figures 2,9, RL = 54Ω, CL = 100pF
●
20
70
140
ns
tSKEW
Differential Receiver Skew, tPLH-tPHL
Figures 2,9, RL = 54Ω, CL = 100pF
●
10
ns
Receiver Output Enable/Disable (LTC1335)
tZL
Receiver Enable to Output Low
Figures 6,12, CL = 15pF, S1 Closed
●
40
90
ns
tZH
Receiver Enable to Output High
Figures 6,12, CL = 15pF, S2 Closed
●
40
90
ns
tLZ
Receiver Disable from Low
Figures 6,12, CL = 15pF, S1 Closed
●
40
90
ns
tHZ
Receiver Disable from High
Figures 6,12, CL = 15pF, S2 Closed
●
50
90
ns
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute maximum ratings are those values beyond which the
safety of the device cannot be guaranteed.
Note 2: 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.
4
Note 3: All typicals are given at VCC = VDD (LTC1321/LTC1322) = 5V,
VEE = – 5V, and TA = 25°C.
Note 4: Short-circuit current for RS485 driver output low state folds back
above VCC. Peak current occurs around VO = 3V.
LTC1321/LTC1322/LTC1335
U W
TYPICAL PERFORMANCE CHARACTERISTICS
RS485 Driver Differential Output
Voltage vs Temperature
RS485 Driver Differential Output
Current vs Output Voltage
15
70
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
TA = 25°C
60
12
50
TIME (µs)
RL = 54Ω
2.5
DIFFERENTIAL OUTPUT CURRENT (mA)
40
30
50
25
0
75
TEMPERATURE (°C)
100
3
125
0
1
2
160
TA = 25°C
100
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT SHORT-CIRCUIT CURRENT (mA)
TA = 25°C
–70
–50
–40
–30
–20
80
60
40
20
–10
0
1
0
2
3
OUTPUT VOLTAGE (V)
4
5
0
1
2
3
4
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
6
RL = 3k
–1
–2
–3
–4
–5
–50 –25
80
OUTPUT LOW
OUTPUT HIGH
2
0
–2
–4
OUTPUT LOW
–8
100
125
1321 G07
SOURCE
(VOUT = 0V)
60
50
25
75
0
TEMPERATURE (°C)
–10
100
125
1321 G19
EIA562 Driver Output Short-Circuit
Current vs Temperature
4
–6
50
25
0
75
TEMPERATURE (°C)
100
18
RL = 3k
TA = 25°C
VEE = –VDD
8
OUTPUT HIGH
2
SINK
(VOUT = 5V)
40
–50 –25
5
10
3
0
120
EIA562 Driver Output Voltage
vs Supply Voltage
5
4
140
1321 G05
1321 G04
EIA562 Driver Output Voltage
vs Temperature
125
RS485 Driver Output Short-Circuit
Current vs Temperature
120
–80
100
1321 G03
RS485 Driver Output Low Voltage
vs Output Current
–60
50
25
0
75
TEMPERATURE (°C)
1321 G02
RS485 Driver Output High Voltage
vs Output Current
1
0
–50 –25
5
3
4
DIFFERENTIAL OUTPUT VOLTAGE (V)
1321 G01
0
6
10
0
1.6
–50 –25
9
20
OUTPUT SHORT-CIRCUIT CURRENT (mA)
DIFFERENTIAL OUTPUT VOLTAGE (V)
2.6
RS485 Driver Skew vs
Temperature
4
5
7
8
9
6
VDD SUPPLY VOLTAGE (V)
10
1321 G08
VOUT = 0V
16
14
SOURCE
12
10
SINK
8
6
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
1321 G09
5
LTC1321/LTC1322/LTC1335
U W
TYPICAL PERFORMANCE CHARACTERISTICS
5.0
0.5
20
IOUT = 3mA
IOUT = 3mA
4.9
18
0.4
4.7
4.6
4.5
4.4
4.3
16
14
0.3
TIME (ns)
OUTPUT VOLTAGE (V)
4.8
OUTPUT VOLTAGE (V)
RS485 Receiver tPLH – tPHL
vs Temperature
Receiver Output Low Voltage
vs Temperature
Receiver Output High Voltage
vs Temperature
0.2
2
4.0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
0
–50 –25
125
50
25
0
75
TEMPERATURE (°C)
100
1321 G10
12
10
8
6
INPUT THRESHOLD VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
2.0
35
14
30
25
20
15
10
4
5
2
0
3.5
4.0
3.0
OUTPUT VOLTAGE (V)
4.5
5.0
0
0.5
1.0
1.5
2.0
OUTPUT VOLTAGE (V)
Driver Output Leakage Current
(Disable/Shutdown) vs Temperature
ICC
±350
SUPPLY CURRENT (mA)
±150
±100
INPUT LOW
1.0
50
25
75
0
TEMPERATURE (°C)
0.8
100
125
1321 G15
Supply Current in EIA562 Mode
vs Temperature (Both Ports)
RL = ∞
450
RL = ∞
400
–IEE
0.6
0.4
–IEE
350
300
250
–IDD
ICC
200
150
100
0.2
±50
1.2
0.8
–50 –25
3.0
1.0
±200
1.4
500
1.2
±250
INPUT HIGH
1.6
Supply Current in RS485 Mode
vs Temperature (Both Ports)
±400
±300
1.8
1321 G14
1321 G13
0
–50 –25
2.5
SUPPLY CURRENT (µA)
2.5
125
TA = 25°C
16
2.0
100
EIA562 Receiver Input Threshold
Voltage vs Temperature
40
TA = 25°C
18
50
25
0
75
TEMPERATURE (°C)
1321 G12
Receiver Output Current
vs Output Low Voltage
120
OUTPUT LEAKAGE CURRENT (µA)
0
–50 –25
125
1321 G11
Receiver Output Current
vs Output High Voltage
50
0
25
50
75
100
125
TEMPERATURE (°C)
1321 G06
6
8
4
4.1
0
10
6
0.1
4.2
12
0
–50 –25
–IDD
50
25
75
0
TEMPERATURE (°C)
100
125
1321 G17
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1321 G18
LTC1321/LTC1322/LTC1335
U
U
U
PI FU CTIO S
LTC1321
LTC1322/LTC1335
VDD (Pin 1): Positive Supply Input for EIA/TIA-562 Drivers.
B1: (Pin 2): Receiver Input.
A1 (Pin 3): Receiver Input.
Z1 (Pin 4): Driver Output.
Y1 (Pin 5): Driver Output.
SEL1 (Pin 6): Interface Mode Select Input.
SEL2 (Pin 7): Interface Mode Select Input.
Y2 (Pin 8): Driver Output.
Z2 (Pin 9): Driver Output.
A2 (Pin 10): Receiver Input.
B2 (Pin 11): Receiver Input.
GND (Pin 12): Ground.
VEE (Pin 13): Negative Supply.
NC (Pin 14): No Connection.
RA2 (Pin 15): Receiver Output.
DE2 (Pin 16): Driver Enable with Internal Pull-Up in RS485
Mode.
DY2 (Pin 17): Driver Input.
OE/VDD (Pin 1): For LTC1335, pin 1 is the receiver
output enable with internal pull-down. For LTC1322, pin
1 is the positive supply input for EIA/TIA-562 drivers.
B1: (Pin 2): Receiver Input.
A1 (Pin 3): Receiver Input.
Z1 (Pin 4): Driver Output.
Y1 (Pin 5): Driver Output.
SEL1 (Pin 6): Interface Mode Select Input.
SEL2 (Pin 7): Interface Mode Select Input.
Y2 (Pin 8): Driver Output.
Z2 (Pin 9): Driver Output.
A2 (Pin 10): Receiver Input.
B2 (Pin 11): Receiver Input.
GND (Pin 12): Ground.
VEE (Pin 13): Negative Supply.
RB2 (Pin 14): Receiver Output.
RA2 (Pin 15): Receiver Output.
DZ2/DE2 (Pin 16): EIA/TIA-562 Driver Input in EIA562
Mode. RS485 Driver Enable with Internal Pull-Up in
RS485 Mode.
DY2 (Pin 17): Driver Input.
ON/OFF (Pin 18): A HIGH logic input enables the
transceivers. A LOW puts the device into shutdown
mode and reduces ICC to 15µA. This pin has an internal
pull-up.
LB (Pin 19): Loopback Control Input. A LOW logic level
enables loopback connections. This pin has an internal
pull-up.
DY1 (Pin 20): Driver Input.
DZ1/DE1 (Pin 21): EIA/TIA-562 Driver Input in EIA562
Mode. RS485 Driver Enable with Internal Pull-up in
RS485 Mode.
RA1 (Pin 22): Receiver Output.
RB1 (Pin 23): Receiver Output.
VCC (Pin 24): Positive Supply; 4.75V ≤ VCC ≤ 5.25V.
ON/OFF (Pin 18): A HIGH logic input enables the transceivers. A LOW puts the device into shutdown mode and
reduces ICC to 15µA. This pin has an internal pull-up.
LB (Pin 19): Loopback Control Input. A LOW logic level
enables loopback connections. This pin has an internal
pull-up.
DY1 (Pin 20): Driver Input.
DE1 (Pin 21): Driver Enable with Internal Pull-Up in RS485
Mode.
RA1 (Pin 22): Receiver Output.
NC (Pin 23): No Connection.
VCC (Pin 24): Positive Supply; 4.75V ≤ VCC ≤ 5.25V.
7
LTC1321/LTC1322/LTC1335
U
U
FU CTIO TABLES
LTC1321
LTC1322
RS485 Driver Mode
RS485 Driver Mode
ON/OFF
INPUTS
SEL
DE
D
LINE
CONDITION
OUTPUTS
Y
Z
ON/OFF
INPUTS
SEL
DE
D
LINE
CONDITION
OUTPUTS
Y
Z
1
1
1
0
No Fault
0
1
1
1
1
0
No Fault
0
1
1
1
1
1
No Fault
1
0
1
1
1
1
No Fault
1
0
1
1
1
X
Fault
Z
Z
1
1
1
X
Fault
Z
Z
1
1
0
X
X
Z
Z
1
1
0
X
X
Z
Z
0
1
X
X
X
Z
Z
0
1
X
X
X
Z
Z
RS485 Receiver Mode
RS485 Receiver Mode
ON/OFF
INPUTS
SEL
A–B
OUTPUT
R
ON/OFF
INPUTS
SEL
A–B
OUTPUT
R
1
1
< – 0.2V
0
1
1
< – 0.2V
0
1
1
> 0.2V
1
1
1
> 0.2V
1
1
1
Inputs Open
1
1
1
Inputs Open
1
0
1
X
Z
0
1
X
Z
RS232/EIA562 Driver Mode
RS232/EIA562 Driver Mode
ON/OFF
INPUTS
SEL
D
LINE
CONDITION
OUTPUT
Y
ON/OFF
INPUTS
SEL
D
LINE
CONDITION
OUTPUT
Y, Z
1
0
0
No Fault
1
1
0
0
No Fault
1
1
0
1
No Fault
0
1
0
1
No Fault
0
1
0
X
Fault
Z
1
0
X
Fault
Z
0
0
X
X
Z
0
0
X
X
Z
RS232/EIA562 Receiver Mode
RS232/EIA562 Receiver Mode
ON/OFF
INPUTS
SEL
A
OUTPUT
R
ON/OFF
INPUTS
SEL
A OR B
OUTPUT
R
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
Inputs Open
1
1
0
Input Open
1
0
0
X
Z
0
0
X
Z
8
LTC1321/LTC1322/LTC1335
U
U
FU CTIO TABLES
LTC1335
EIA562 Driver Mode
RS485 Driver Mode
ON/OFF
INPUTS
SEL
DE
D
LINE
CONDITION
OUTPUTS
Y
Z
ON/OFF
INPUTS
SEL
D
LINE
CONDITION
OUTPUT
Y, Z
1
1
1
0
No Fault
0
1
1
0
0
No Fault
1
1
1
1
1
No Fault
1
0
1
0
1
No Fault
0
1
1
1
X
Fault
Z
Z
1
0
X
Fault
Z
1
1
0
X
X
Z
Z
0
0
X
X
Z
0
1
X
X
X
Z
Z
RS485 Receiver Mode
EIA562 Receiver Mode
INPUTS
INPUTS
ON/OFF
SEL
OE
A–B
OUTPUT
R
ON/OFF
SEL
OE
A OR B
OUTPUT
R
1
1
0
< – 0.2V
0
1
0
0
0
1
1
1
0
> 0.2V
1
1
0
0
1
0
1
1
0
Inputs Open
1
1
0
0
Input Open
1
1
1
1
X
Z
1
0
1
X
Z
0
1
X
X
Z
0
0
X
X
Z
W
BLOCK DIAGRA SM
LTC1321 Interface Configuration Without Loopback
VDD
A1
Y1
SEL1
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
1
24
3
5
6
22
20
19
VCC
VDD
RA1
B1
A1
DY1
LB
Z1
Y1
*SEL1
SEL2
Y2
A2
GND
7
8
10
12
18
17
15
13
ON
DY2
SEL2
Y2
RA2
A2
VEE
GND
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
1
24
2
3
4
5
6
22
21
20
19
VCC
RA1
DE1
DY1
8
10
12
17
15
13
A1
Y1
SEL1
LB
*SEL2
ON
Y2
Z2
7
18
VDD
DY2
A2
RA2
VEE
B2
GND
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
1
24
3
5
6
7
8
9
22
20
19
18
17
1
16
10
11
12
15
13
RA1
VDD
B1
A1
DY1
Z1
VCC
LB
Y1
*SEL1
ON
DY2
*SEL2
Y2
Z2
DE2
RA2
A2
B2
VEE
GND
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
24
1
2
22
3
4
5
21
20
6
19
7
18
8
9
17
10
11
12
16
15
13
VCC
RA1
DE1
DY1
LB
ON
DY2
DE2
RA2
VEE
1321BD01
* SEL1/SEL2 = VCC
9
LTC1321/LTC1322/LTC1335
W
BLOCK DIAGRA SM
LTC1321 Interface Configuration With Loopback
VDD
Y1
SEL1
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
1
24
22
5
6
20
19
VCC
VDD
RA1
Z1
Y2
7
8
18
17
15
GND
12
13
22
4
21
DY1
LB
Y1
*SEL1
SEL2
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
1
24
ON
DY2
SEL2
Y2
20
6
19
7
18
8
17
15
RA2
VEE
5
GND
12
13
VCC
VDD
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
1
24
22
RA1
DE1
DY1
LB
ON
Y1
SEL1
*SEL2
Y2
20
6
19
7
8
18
17
16
DY2
Z2
RA2
VEE
5
GND
9
12
15
13
VCC
RA1
VDD
Z1
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
1
24
4
21
DY1
LB
Y1
*SEL1
ON
DY2
22
*SEL2
Y2
5
20
6
19
7
8
DE2
RA2
Z2
VEE
GND
9
12
18
17
16
15
13
VCC
RA1
DE1
DY1
LB
ON
DY2
DE2
RA2
VEE
1321 BD02
*SEL1/SEL2 = VCC
LTC1322/LTC1335 Interface Configuration Without Loopback
*VDD /OE
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
24
1 *
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
VCC
*VDD /OE
B1
B1
A1
Z1
Y1
SEL1
SEL2
Y2
Z2
A2
B2
GND
2
23
3
22
4
21
5
20
6
19
7
8
9
16
10
15
11
12
14
13
*
RB1
RA1
A1
DY1
LB
Z1
Y1
**SEL1
ON
DY2
Y2
DZ2
Z2
RA2
RB2
VEE
3
24
23
22
21
DZ1
SEL2
18
17
1
2
A2
B2
GND
4
5
6
7
20
19
VCC
*VDD /OE
18
17
9
16
10
15
11
12
14
13
VCC *VDD /OE
B1
RB1
B1
RA1
DE1
DY1
A1
Z1
Y1
SEL1
LB
**SEL2
8
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
24
1 *
ON
DY2
DZ2
RA2
Y2
Z2
A2
B2
RB2
VEE
GND
2
23
3
22
4
21
5
20
6
19
7
8
18
17
9
16
10
11
12
15
14
13
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
24
1 *
2
RB1
RA1
A1
DZ1
Z1
DY1
LB
ON
DY2
Y1
**SEL1
**SEL2
Y2
Z2
3
4
5
6
7
8
RA2
RB2
VEE
B2
GND
22
21
20
19
18
17
9
16
DE2
A2
23
10
11
12
15
14
13
VCC
RB1
RA1
DE1
DY1
LB
ON
DY2
DE2
RA2
RB2
VEE
1322/35 BD01
* FOR LTC1322 ONLY, PIN 1 IS VDD, AND OE IS ALWAYS ENABLED.
FOR LTC1335, PIN 1 IS OE, AND VDD IS CONNECTED TO VCC.
** SEL1/SEL2 = VCC.
10
LTC1321/LTC1322/LTC1335
W
BLOCK DIAGRA SM
LTC1322/LTC1335 Interface Configuration With Loopback
PORT 1 = EIA562 MODE
PORT 2 = EIA562 MODE
24
1 *
*VDD /OE
PORT 1 = RS485 MODE
PORT 2 = EIA562 MODE
VCC
1
*VDD /OE
24
*
23
23
22
Z1
Y1
SEL1
4
21
5
6
20
19
7
SEL2
18
17
9
16
Y2
Z2
15
GND
Z1
21
LB
14
13
12
ON
DY2
Y2
DZ2
Z2
20
5
6
Y1
**SEL1
19
7
SEL2
8
22
4
DZ1
DY1
8
18
17
9
16
15
RA2
RB2
VEE
*VDD /OE
GND
14
13
12
VCC *VDD /OE
PORT 1 = RS485 MODE
PORT 2 = RS485 MODE
24
1 *
23
RB1
23
RB1
RA1
VCC
PORT 1 = EIA562 MODE
PORT 2 = RS485 MODE
24
1 *
RA1
22
DE1
Z1
Y1
SEL1
DY1
4
21
5
6
20
19
LB
18
8
Y2
17
16
DZ2
9
Z2
RA2
RB2
VEE
RA1
Z1
15
14
13
12
GND
22
4
21
DZ1
DY1
LB
Y1
**SEL1
7
**SEL2
ON
DY2
RB1
ON
DY2
**SEL2
Y2
5
20
6
19
7
18
8
17
16
DE2
RA2
RB2
VEE
Z2
GND
9
15
14
13
12
VCC
RB1
RA1
DE1
DY1
LB
ON
DY2
DE2
RA2
RB2
VEE
1322/35 BD02
* FOR LTC1322 ONLY, PIN 1 IS VDD, AND OE IS ALWAYS ENABLED.
FOR LTC1335, PIN 1 IS OE, AND VDD IS CONNECTED TO VCC.
** SEL1/SEL2 = VCC.
TEST CIRCUITS
VCC
Y
3V
3V
R
D
VOD
SEL Y
R
A
SEL
R
CL
B
OE
RL
Z
DE
VOC
S1
CL
500Ω
DR OUT
15pF
CL
S2
0V
3V
Z
1321/22/35 F03
1321/22/35 F02
1321/22/35 F01
Figure 1. RS485 Driver
Test Load
Figure 2. RS485 Driver/Receiver
Timing Test Circuit
Figure 3. RS485 Driver Output
Enable/Disable Timing Test Load
VCC
0V
D
0V
0V
SEL
Y OR Z
D
CL
SEL
Y OR Z
S1
SEL
A OR B
1k
R
RL
RX OUT
OE
15pF
0V
1321/22/35 F04
Figure 4. EIA/TIA-562 Driver
Timing Test Circuit
CL
S2
1321/22/35 F05
1321/22/35 F06
Figure 5. EIA/TIA-562 Receiver
Timing Test Circuit
Figure 6. Receiver Output
Enable/Disable Timing Test Load
11
LTC1321/LTC1322/LTC1335
U
W
SWITCHI G WAVEFOR S
3V
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
1.5V
D
1.5V
0V
tPLH
tPHL
VO
90%
Y–Z
VDIFF = V(Y) – V(Z)
50%
10%
–VO
90%
50%
10%
1/2 VO
tr
tf
Z
VO
Y
tSKEW
tSKEW
1321/22/35 F07
Figure 7. RS485 Driver Propagation Delays
3V
1.5V
DE
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
1.5V
0V
tZL
tLZ
5V
Y OR Z
2.3V
OUTPUT NORMALLY LOW
VOL
tZH
OUTPUT NORMALLY HIGH
VOH
0.5V
tHZ
0.5V
2.3V
Y OR Z
0V
1321/22/35 F08
Figure 8. RS485 Driver Enable and Disable Times
V OD2
0V
A–B
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
INPUT
0V
–V OD2
tPLH
OUTPUT
VOH
R
tPHL
1.5V
1.5V
VOL
1321/22/35 F09
Figure 9. RS485 Receiver Propagation Delays
3V
1.5V
1.5V
D
0V
tPHL
tPLH
VO
Y OR Z
0V
0V
–VO
Figure 10. EIA/TIA-562 Driver Propagation Delays
12
1321/22/35 F10
LTC1321/LTC1322/LTC1335
U
W
SWITCHI G WAVEFOR S
V IH
1.7V
1.3V
A OR B
VIL
tPHL
tPLH
VOH
2.4V
R
1321/22/35 F11
0.8V
VOL
Figure 11. EIA/TIA-562 Receiver Propagation Delays
3V
1.5V
OE
0V
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
tZL
1.5V
tLZ
5V
R
1.5V
OUTPUT NORMALLY LOW
VOL
tZH
OUTPUT NORMALLY HIGH
VOH
0.5V
tHZ
0.5V
1.5V
R
0V
1321/22/35 F12
Figure 12. Receiver Enable and Disable Times
U
W
U
UO
APPLICATI
S I FOR ATIO
Basic Theory of Operation
The LTC1321/LTC1322/LTC1335 each have two interface
ports. Each port may be configured as single-ended EIA562
transceiver(s) or differential RS485 transceiver by forcing
the port’s selection input to a LOW or HIGH, respectively.
The LTC1321 provides one EIA562 driver and one EIA562
receiver per port to maintain same pinout as SP301. The
LTC1322 and LTC1335 each provide two drivers and two
receivers per port. Additionally, the LTC1321 and LTC1322
single-ended ports are RS232 compatible with higher VDD
and VEE supply levels.
All the interface drivers feature three-state outputs. Interface outputs are forced into high impedance when the driver
is disabled, in the shutdown mode, or with the power off.
All the interface driver outputs are fault protected by a
current limiting and thermal shutdown circuit. The thermal
shutdown circuit disables both the EIA562 and RS485
driver outputs when the die temperature reaches 150°C.
The thermal shutdown circuit enables the drivers when the
die temperature cools to 135°C.
In RS485 mode, shutdown mode or with the power off,
the input resistance of the receiver is 24k. The input
resistance drops to 6.3k in EIA562 mode.
A logic LOW at the ON/OFF pin shuts down the device
and forces all the outputs into a high impedance state.
A logic HIGH enables the device. An internal 4µA current
source to VCC pulls the ON/OFF pin HIGH if left open.
In RS485 mode, an internal 4µA current source pulls
the driver enable pin HIGH if left open. The RS485
receiver has a 4µA current source at the noninverting
input. If both the RS485 receiver inputs are open, the
output is a high state. Both the current sources are
disabled in the EIA562 mode.
For LTC1335, a logic LOW at the OE pin enables all the
receiver outputs and a logic HIGH disables all the
receiver outputs. An internal 4µA current source pulls
the OE pin LOW if left open.
A loopback mode enables internal connections from
driver outputs to receiver inputs for self-test when the
13
LTC1321/LTC1322/LTC1335
U
W
U
UO
APPLICATI
S I FOR ATIO
LB pin has a LOW logic state. The driver outputs are not
isolated from the external loads. This allows transmitter
verification under the loaded condition. An internal 4µA
current source pulls the LB pin HIGH if left open and
disables the loopback configuration.
LTC1321/LTC1322 ONLY
VCC
5V
24
0.1µF
RX OUT
EIA562 and RS485 output levels are supported when
LTC1321/LTC1322/LTC1335 are powered from ±5V supplies. The LTC1321/LTC1322 require the VDD and VCC pins
to be tied together and connected to 5V supply (Figure 13).
The VDD and VCC are connected internally and brought out
at VCC pin in the LTC1335. The unloaded outputs will
swing from – 5V to 5V in EIA562 mode, and from 0V to 5V
in RS485 mode.
22
120Ω RS485 I/O
4
5
20
DR IN
19
5V
LTC1321
LTC1322
LTC1335
18
5V
17
DR IN
DR IN
RX OUT
RX OUT
VEE
–5V
VDD (LTC1321/LTC1322)
OR OE (LTC1335)
21
DR ENABLE
EIA562/RS485 Applications
1
2
3
6
7
8
16
9
15
10
14
11
13
12
5V
0V
EIA562 DR OUT
EIA562 DR OUT (LTC1322/LTC1335 ONLY)
EIA562 RX IN
EIA562 RX IN (LTC1322/LTC1335 ONLY)
0.1µF
1321/22/35 F13
Figure 13. EIA562/RS485 Interfaces with ±5V Supplies
RS232/RS485 Applications
If true RS232-compatible outputs are required, the
LTC1321/LTC1322 may be used with the VDD and VEE
supply voltages increased to provide the additional signal
swing. To meet RS232, VDD must be between 6.5V and
10V, and VEE must be between – 6.5V and – 10V. VCC
remains connected to 5V. If only ±12V supplies are available, inexpensive Zener diodes (Z1 and Z2) may be connected in series with VDD and VEE supply pins as shown in
Figure 14. An optional 16V Zener diode between VCC and
VEE is recommended to keep the maximum voltage between VCC and VEE within safe limits.
V+
12V
VCC
5V
DR ENABLE
DR IN
Z3*
1N5246B
16V
LocalTalk and AppleTalk are registered trademarks of Apple Computer, Inc.
14
5V
5V
DR IN
DR IN
RX OUT
LocalTalk®/AppleTalk® Applications
The LTC1321/LTC1322/LTC1335 can be used to provide
AppleTalk/LocalTalk-compatible signals in RS485 mode.
Figure 15 shows one half of an LTC1335 connected to an
LTC1320 AppleTalk transceiver in a typical LocalTalk
configuration. Figure 16 shows a typical direct-wire connection with the LTC1335 as the DCE transceiver and the
LTC1320 as the DTE transceiver. The LTC1321/LTC1322/
LTC1335 RS485 mode is capable of meeting all AppleTalk
protocol specifications.
1 VDD
2
3
24
0.1µF
RX OUT
VEE
–
V
–12V
RX OUT
Z2
1N5229B
4.3V
Z1
1N5229B
4.3V
22
0.1µF
21
19
18
120Ω RS485 I/O
4
5
20
6
LTC1321
LTC1322
7
17
8
16
9
15
10
14
11
13
12
5V
0V
RS232 DR OUT
RS232 DR OUT (LTC1322 ONLY)
RS232 RX IN
RS232 RX IN (LTC1322 ONLY)
0.1µF
1321/22/35 F14
*OPTIONAL
Figure 14. RS232/RS485 Interfaces with 5V, ±12V Supplies
LTC1321/LTC1322/LTC1335
W
U
U
UO
APPLICATI
S I FOR ATIO
1k
OE
RFI
TXD
TXI
TXDEN
RXEN
RXO
RXO
RXDO
1k
18
1
5V
17 TXD –
2
RFI
RFI
4
5
14
RFI
1k
5V
6
13
7
12
8
–
11 RXD
+ RFI
10 RXD
RFI
9
LTC1320
24
2
23
22
3
21
4
120Ω
120Ω
16 TXD +
15
3
RFI
1
RFI
SEL1, 5V
1k
22Ω
22Ω
SEL2, 5V
RFI =
20
5
6
7
19
LTC1335
18
8
17
9
16
100pF
10
5V
RA1
DE1
DY1
5V
5V
15
11
14
12
13
–5V
1321/22/35 F15
Figure 15. Apple LocalTalk Implemented Using
LTC1320 and LTC1335 Transceivers
TXD
TXI
18
5V
17 TXD –
1
2
3
16 TXD +
TXDEN
RXEN
RXO
RXO
RXDO
4
15 TXO
5
14
6
7
12 RXI
8
11 RXD –
LTC1320
120Ω
120Ω
RFI
RFI
RFI
RFI
RFI
– 5V
13 RXI
9
OE
RFI
1
24
2
23
3
22
4
21
120Ω
RFI
10 RXD +
RFI
RFI
SEL1, 5V
SEL2
RFI
20
5
19
6
7
LTC1335
18
120Ω
RFI
22Ω
RFI
22Ω
RFI =
RFI
RFI
100pF
8
17
9
16
10
15
11
14
12
13
5V
RA1
DE1
DY1
5V
5V
DY2
DZ2
RA2
–5V
1321/22/35 F16
Figure 16. AppleTalk Direct Connect Using LTC1320
for DTE and LTC1335 for DCE Transceivers
15
LTC1321/LTC1322/LTC1335
UO
TYPICAL APPLICATI
S
and receivers for half duplex multi-point data transmission. The wires must be terminated at both ends with
resistors equal to the wire’s characteristic impedance,
generally 120Ω. An optional shield around the twisted pair
helps to reduce unwanted noise and should be connected
to ground at one end.
A typical EIA562/RS232 interface application is shown in
Figure 17 with LTC1322. A typical EIA562 interface application with LTC1335 is shown in Figure 18.
A typical connection for RS485 transceiver is shown in
Figure 19. A twisted pair of wires connects up to 32 drivers
1/2 LTC1322
DR IN
DR IN
RX OUT
RX OUT
OV
1/2 LTC1335
1/2 LTC1322
17
8
EIA562/
3
22
16
9
RS232
2
23
15
10 INTERFACE
5
20
14
11
4
21
LINES
7
6
RX OUT
DR IN
RX OUT
DR IN
DR IN
RX OUT
DR IN
RX OUT
OV
0V
1/2 LTC1335
17
8
EIA562
3
22
16
9
INTERFACE
2
23
15
10
LINES
5
20
14
11
4
21
7
6
1
1321/22/35 F17
1
OE = 0V
DR ENABLE
DR IN
5V
20
11
2
3
21
10
120Ω
120Ω
4
5
6
5 4
15
16
9
8
17
7
3 2
RX OUT
DR ENABLE
DR IN
5V
1/2 LTC1322/LTC1335
20 21
DR IN
22 6
RX OUT
DR ENABLE
5V
Figure 19. Typical Connection for RS485 Interface
16
DR IN
DR IN
0V
1321/22/35 F18
OE = 0V
1/2 LTC1322/LTC1335
1/2 LTC1322/LTC1335
22
RX OUT
Figure 18. Typical Connection for EIA562 Interface
Figure 17. Typical Connection for EIA562/RS232 Interface
RX OUT
RX OUT
1321/22/35 F19
LTC1321/LTC1322/LTC1335
UO
TYPICAL APPLICATI
S
A typical RS422 connection shown in Figure 20 allows one
driver and ten receivers on a twisted pair of wires terminated with a 100Ω resistor at one end. The ground shield
is optional.
A typical twisted pair line repeater is shown in Figure 21.
As data transmission rate drops with increased cable
length, repeater can be inserted to improve transmission
rate or to transmit beyond 4000 feet limit.
1/2 LTC1322/LTC1335
RX OUT
22
6
1/2 LTC1322/LTC1335
DR ENABLE
DR IN
5V
RX OUT
1/2 LTC1322/LTC1335
3 2
21
20
5V
11
4
100Ω
5
10
2
9
15
RX OUT
7
5V
6
16
22
100Ω
3
17
DR ENABLE
DR IN
8
1321/22/35 F20
Figure 20. Typical Connection for RS422 Interface
5V
22
RX IN
20
21 6
2
4
3
5
100Ω
TX OUT
1/2 LTC1322/LTC1335
1321/22/35 F21
Figure 21. Typical Cable Repeater for RS422 Interface
17
LTC1321/LTC1322/LTC1335
UO
TYPICAL APPLICATI
S
The LTC1322/LTC1335 can be used to translate EIA562 to
RS422 interface level or vice versa as shown in Figure 22.
One port is configured as EIA562 transceiver and the other
as RS485 transceiver. The LTC1322 can also support
RS232 to RS422 level translation if VDD is between 6.5V
and 10V, and VEE is between – 6.5V and – 10V.
Using two LTC1321/LTC1335 as level translators, the
EIA562/RS232 interface distance can be extended to 4000
feet with twisted wires (Figure 23).
5V
15 20
21 6
4
10
RX IN
TX OUT
5
EIA562/RS232*
RS422
LTC1322/LTC1335
2
8
TX OUT
100Ω
RX IN
3
7
17 22
1321/22/35 F22
* RS232 LEVELS ARE SUPPORTED ON LTC1322.
Figure 22. Typical EIA562/RS232 to RS422 Level Translator
5V
15 20
RX IN
22 17
RS422
21 6
2
4
10
EIA562/RS232*
TX OUT
8
100Ω
5
LTC1322/LTC1335
EIA562/RS232*
LTC1322/LTC1335
4
2
8
10
100Ω
3
7
TX OUT
3
6
17 22
RX IN
5
21
20 15
7
1321/22/35 F23
* RS232 LEVELS ARE SUPPORTED ON LTC1322.
5V
Figure 23. Typical Cable Extension for EIA562/RS232 Interface
18
LTC1321/LTC1322/LTC1335
U
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
N Package
24-Lead Plastic DIP
1.265
(32.131)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
0.260 ± 0.010
(6.604 ± 0.254)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.015
(0.381)
MIN
0.009 – 0.015
(0.229 – 0.381)
(
0.125
(3.175)
MIN
+0.025
0.325 –0.015
+0.635
8.255
–0.381
0.065
(1.651)
TYP
)
0.050 – 0.085
(1.27 – 2.159)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
N24 0592
S Package
24-Lead Plastic SOL
24
23
22
21
0.598 – 0.614
(15.190 – 15.600)
(NOTE 2)
20 19 18 17 16
15
14
13
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF
PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY
BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS.
2. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR
PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT
EXCEED 0.006 INCH (0.15mm).
1
0.005
(0.127)
RAD MIN
0.291 – 0.299
(7.391 – 7.595)
(NOTE 2)
0.010 – 0.029 × 45°
(0.254 – 0.737)
2
3
4
5
6
7
8
9
10
11
0.093 – 0.104
(2.362 – 2.642)
12
0.037 – 0.045
(0.940 – 1.143)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
0.050
(1.270)
TYP
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.004 – 0.012
(0.102 – 0.305)
0.014 – 0.019
(0.356 – 0.482)
SOL24 0392
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
19
LTC1321/LTC1322/LTC1335
U.S. Area Sales Offices
NORTHEAST REGION
Linear Technology Corporation
One Oxford Valley
2300 E. Lincoln Hwy.,Suite 306
Langhorne, PA 19047
Phone: (215) 757-8578
FAX: (215) 757-5631
SOUTHEAST REGION
Linear Technology Corporation
17060 Dallas Parkway
Suite 208
Dallas, TX 75248
Phone: (214) 733-3071
FAX: (214) 380-5138
SOUTHWEST REGION
Linear Technology Corporation
22141 Ventura Blvd.
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
Phone: (508) 658-3881
FAX: (508) 658-2701
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
International Sales Offices
FRANCE
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
Phone: 33-1-41079555
FAX: 33-1-46314613
KOREA
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
Phone: 82-2-792-1617
FAX: 82-2-792-1619
TAIWAN
Linear Technology Corporation
Rm. 801, No. 46, Sec. 2
Chung Shan N. Rd.
Taipei, Taiwan, R.O.C.
Phone: 886-2-521-7575
FAX: 886-2-562-2285
GERMANY
Linear Techonolgy GmbH
Untere Hauptstr. 9
D-85386 Eching
Germany
Phone: 49-89-3197410
FAX: 49-89-3194821
SINGAPORE
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Phone: 65-293-5322
FAX: 65-292-0398
UNITED KINGDOM
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Phone: 44-276-677676
FAX: 44-276-64851
JAPAN
Linear Technology KK
5F YZ Bldg.
4-4-12 Iidabashi, Chiyoda-Ku
Tokyo, 102 Japan
Phone: 81-3-3237-7891
FAX: 81-3-3237-8010
World Headquarters
Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA 95035-7487
Phone: (408) 432-1900
FAX: (408) 434-0507
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977
LT/GP 0594 10K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994
工商网监
湘ICP备2023018690号
