SN75161BDWR Datasheet, PDF (2/22 Pages) Texas Instruments – OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS

SN75161B, SN75162B
OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS
SLLS005B – OCTOBER 1980 – REVISED MAY 1995
description (continued)
The direction of data through these driver-receiver pairs is determined by the DC, TE, and SC (on SN75162B)
enable signals. The SC input on the SN75162B allows the REN and IFC transceivers to be controlled
independently.
The driver outputs (GPIB I/O ports) feature active bus-terminating resistor circuits designed to provide a high
impedance to the bus when supply voltage V_CC is 0. The drivers are designed to handle loads up to 48 mA of
sink current. Each receiver features pnp transistor inputs for high input impedance and hysteresis of 400 mV
for increased noise immunity. All receivers have 3-state outputs to present a high impedance to the terminal
when disabled.
The SN75161B and SN75162B are characterized for operation from 0°C to 70°C.
Function Tables
SN75161B RECEIVE/TRANSMIT
CONTROLS
DC
TE
ATN†
BUS-MANAGEMENT CHANNELS
ATN†
SRQ
REN
IFC
EOI
DATA-TRANSFER CHANNELS
DAV
NDAC
NRFD
(Controlled by DC)
(Controlled by TE)
H
H
H
T
R
T
R
R
T
R
R
H
H
L
R
L
L
H
R
T
R
T
T
R
T
T
L
L
L
T
H
L
X
R
T
R
R
R
R
T
T
L
H
X
T
R
T
T
T
T
R
R
H = high level, L = low level, R = receive, T = transmit, X = irrelevant
Direction of data transmission is from the terminal side to the bus side, and the direction of data receiving is from the bus side to the terminal side.
Data transfer is noninverting in both directions.
† _{ATN is a normal transceiver channel that functions additionally as an internal direction control or talk enable for EOI whenever the DC and TE}
inputs are in the same state. When DC and TE are in opposite states, the ATN channel functions as an independent transceiver only.
SN75162B RECEIVE/TRANSMIT
CONTROLS
BUS-MANAGEMENT CHANNELS
DATA-TRANSFER CHANNELS
SC
DC
TE
ATN†
ATN†
SRQ
REN
IFC
EOI
DAV
NDAC NRFD
(Controlled by DC) (Controlled by SC)
(Controlled by TE)
H
H
H
R
T
H
H
L
T
T
R
R
R
L
L
H
T
R
L
L
L
R
R
T
T
T
H
L
X
R
T
R
R
T
T
L
H
X
T
R
T
T
R
R
H
T
T
L
R
R
H = high level, L = low level, R = receive, T = transmit, X = irrelevant
Direction of data transmission is from the terminal side to the bus side, and the direction of data receiving is from the bus side to the terminal side.
Data transfer is noninverting in both directions.
† _{ATN is a normal transceiver channel that functions additionally as an internal direction control or talk enable for EOI whenever the DC and TE}
inputs are in the same state. When DC and TE are in opposite states, the ATN channel functions as an independent transceiver only.
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