LTC1321 LINER [Linear Technology], LTC1321 Datasheet - Page 7

• Manufacturer Part Number: LTC1321
• Description: RS232/EIA562/RS485 Transceivers
• Manufacturer: LINER [Linear Technology]

PI FU CTIO S
LTC1321
V
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.
V
NC (Pin 14): No Connection.
R
DE2 (Pin 16): Driver Enable with Internal Pull-Up in RS485
Mode.
D
ON/OFF (Pin 18): A HIGH logic input enables the trans-
ceivers. A LOW puts the device into shutdown mode and
reduces I
LB (Pin 19): Loopback Control Input. A LOW logic level
enables loopback connections. This pin has an internal
pull-up.
D
DE1 (Pin 21): Driver Enable with Internal Pull-Up in RS485
Mode.
R
NC (Pin 23): No Connection.
V
DD
EE
A2
Y2
Y1
A1
CC
U
(Pin 1): Positive Supply Input for EIA/TIA-562 Drivers.
(Pin 13): Negative Supply.
(Pin 24): Positive Supply; 4.75V V
(Pin 15): Receiver Output.
(Pin 17): Driver Input.
(Pin 20): Driver Input.
(Pin 22): Receiver Output.
CC
U
to 15 A. This pin has an internal pull-up.
U
CC
5.25V.
LTC1322/LTC1335
OE/V
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.
V
R
R
D
Mode. RS485 Driver Enable with Internal Pull-Up in
RS485 Mode.
D
ON/OFF (Pin 18): A HIGH logic input enables the
transceivers. A LOW puts the device into shutdown
mode and reduces I
pull-up.
LB (Pin 19): Loopback Control Input. A LOW logic level
enables loopback connections. This pin has an internal
pull-up.
D
D
Mode. RS485 Driver Enable with Internal Pull-up in
RS485 Mode.
R
R
V
EE
CC
B2
A2
Z2
Y2
Y1
Z1
A1
B1
/DE2 (Pin 16): EIA/TIA-562 Driver Input in EIA562
/DE1 (Pin 21): EIA/TIA-562 Driver Input in EIA562
(Pin 13): Negative Supply.
(Pin 14): Receiver Output.
(Pin 15): Receiver Output.
(Pin 17): Driver Input.
(Pin 20): Driver Input.
(Pin 22): Receiver Output.
(Pin 23): Receiver Output.
(Pin 24): Positive Supply; 4.75V V
DD
LTC1321/LTC1322/LTC1335
(Pin 1): For LTC1335, pin 1 is the receiver
CC
to 15 A. This pin has an internal
CC
5.25V.
7