Datasheet

SN54LVTH18646A, SN54LVTH182646A, SN74LVTH18646A, SN74LVTH182646A
3.3-V ABT SCAN TEST DEVICES
WITH 18-BIT TRANSCEIVERS AND REGISTERS
SCBS311D – MARCH 1994 – REVISED JUNE 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
L
DIR
L
CLKAB
X
CLKBA
X
SAB
X
SBA
LL
DIR
H
CLKAB
X
CLKBA
X
SAB
L
SBA
X
X
DIR
X
CLKAB CLKBA
X
SAB
X
SBA
X
L
DIR
L
CLKAB
X
CLKBA
X
SAB
X
SBA
H
X
H
X
X
XX
X
X
X
LH X XHX
↑
↑
↑↑
BUS B
BUS A
BUS B
BUS A
BUS B
BUS A
BUS B
BUS A
OE
OE
OEOE
REAL-TIME TRANSFER
BUS B TO BUS A
REAL-TIME TRANSFER
BUS A TO BUS B
STORAGE FROM
A, B, OR A AND B
TRANSFER STORED DATA
TO A AND/OR B
Figure 1. Bus-Management Functions