Datasheet

SN75ALS162
OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVER
SLLS020C – JUNE 1986 – REVISED MAY 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
RECEIVE/TRANSMIT FUNCTION TABLE
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
T
T
R
R
H H L
R
T
R
T
R
R
L L H
T
R
R
R
T
T
L L L
T
R
T
R
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.
CHANNEL IDENTIFICATION TABLE
NAME
IDENTITY CLASS
DC Direction Control
TE Talk Enable
Control
SC System Control
ATN Attention
SRQ Service Request
REN Remote Enable
Bus Management
IFC Interface Clear
EOI End or Identify
DAV Data Valid
NDAC No Data Accepted
Data Transfer
NRFD Not Ready for Data