Datasheet

SN54ABT18245A, SN74ABT18245A
SCAN TEST DEVICES
WITH 18-BIT BUS TRANSCEIVERS
SCBS110H – AUGUST 1992 – REVISED FEBRUARY 1999
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
Boundary-Control
Register
Bypass Register
Identification
Register
Boundary-Scan Register
Instruction Register
TDI
TMS
TCK
TDO
1DIR
1OE
1A1
1B1
One of Nine Channels
2DIR
2OE
2A1 2B1
One of Nine Channels
TAP
Controller
V
CC
V
CC
1
56
55
26
31
43
30
28
29
2
14
27