7
LTC1321/LTC1322/LTC1335
V
DD
(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.
V
EE
(Pin 13): Negative Supply.
NC
(Pin 14): No Connection.
R
A2
(Pin 15): Receiver Output.
DE2 (Pin 16): Driver Enable with Internal Pull-Up in RS485
Mode.
D
Y2
(Pin 17): Driver Input.
ON/OFF (Pin 18): A HIGH logic input enables the trans-
ceivers. A LOW puts the device into shutdown mode and
reduces I
CC
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.
D
Y1
(Pin 20): Driver Input.
DE1 (Pin 21): Driver Enable with Internal Pull-Up in RS485
Mode.
R
A1
(Pin 22): Receiver Output.
NC (Pin 23): No Connection.
V
CC
(Pin 24): Positive Supply; 4.75V ≤ V
CC
≤ 5.25V.
OE/V
DD
(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.
V
EE
(Pin 13): Negative Supply.
R
B2
(Pin 14): Receiver Output.
R
A2
(Pin 15): Receiver Output.
D
Z2
/DE2 (Pin 16): EIA/TIA-562 Driver Input in EIA562
Mode. RS485 Driver Enable with Internal Pull-Up in
RS485 Mode.
D
Y2
(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 I
CC
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.
D
Y1
(Pin 20): Driver Input.
D
Z1
/DE1 (Pin 21): EIA/TIA-562 Driver Input in EIA562
Mode. RS485 Driver Enable with Internal Pull-up in
RS485 Mode.
R
A1
(Pin 22): Receiver Output.
R
B1
(Pin 23): Receiver Output.
V
CC
(Pin 24): Positive Supply; 4.75V ≤ V
CC
≤ 5.25V.
PI FU CTIO S
U
UU
LTC1321
LTC1322/LTC1335
