Datasheet

SN74FB2031
9-BIT TTL/BTL ADDRESS/DATA TRANSCEIVER
SCBS176N – NOVEMBER 1991 – REVISED JUNE 2001
5–32
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
BIAS V
CC
establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when V
CC
is not connected.
BG V
CC
and BG GND are the supply inputs for the bias generator.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
0°C to 70°C QFP – RC Tube SN74FB2031RC FB2031
†
Package drawings, standard packing quantities, thermal data,
symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Function Tables
TRANSCEIVER
INPUTS
OEA OEB OEB
FUNCTION
L H L A data to B bus
H L X
H XH
B data to A bus
H H L A data to B bus, B data to A bus
L L X
L X H
Isolation
STORAGE MODE
LCA, LCB
RESULT
0 Transparent
1 Latches latched
↑ Flip-flops triggered
SELECT
SEL1
SEL0
MUX
AB
MUX
BA
0 0 Latch Latch
0 1 Through Through
1 0 Flip-flop Flip-flop
1 1 Flip-flop Latch