Datasheet

SN54ABT8543, SN74ABT8543
SCAN TEST DEVICES WITH
OCTAL REGISTERED BUS TRANSCEIVERS
SCBS120E – AUGUST 1991 – REVISED JULY 1996
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
Boundary-Control
Register
Bypass Register
Boundary-Scan Register
Instruction Register
TDI
TMS
TCK
TDO
TAP
Controller
V
CC
V
CC
1D
C1
1D
C1
One of Eight Channels
OEBA
CEBA
LEBA
OEAB
CEAB
LEAB
A1 B1
25
13
26
27
28
3
2
1
4
16
14
15
Pin numbers shown are for the DL, DW, and JT packages.