LTC1321 Datasheet, PDF (7/20 Pages) Linear Technology – RS232/EIA562/RS485 Transceivers

PI FU CTIO S
LTC1321
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.
LTC1321/LTC1322/LTC1335
LTC1322/LTC1335
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.
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