Datasheet

SN54ABTH18502A, SN54ABTH182502A, SN74ABTH18502A, SN74ABTH182502A
SCAN TEST DEVICES
WITH 18-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS164E – AUGUST 1993 – REVISED DECEMBER 1996
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
2A1
1D
C1
1D
C1
1D
C1
1D
C1
Boundary-Control
Register
Bypass Register
Identification
Register
Boundary-Scan Register
Instruction
Register
TAP
Controller
2LEBA
2CLKBA
2OEBA
TDI
TMS
TCK
2B1
TDO
2OEAB
2LEAB
2CLKAB
1A1
1D
C1
1D
C1
1D
C1
1D
C1
1LEBA
1CLKBA
1OEBA
1B1
1OEAB
1LEAB
1CLKAB
V
CC
V
CC
One of Nine Channels
One of Nine Channels
60
59
62
54
55
53
63
22
23
21
28
27
30
10
24
56
26
51
40
58
V
CC
V
CC
V
CC
V
CC
Pin numbers shown are for the PM package.