Datasheet

SN54LVTH18504A, SN54LVTH182504A, SN74LVTH18504A, SN74LVTH182504A
3.3-V ABT SCAN TEST DEVICES
WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS667B – JULY 1996 – REVISED JUNE 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
A1
1D
C1
1D
C1
1D
C1
1D
C1
Boundary-Control
Register
Bypass Register
Identification
Register
Boundary-Scan Register
Instruction
Register
TAP
Controller
CLKENAB
LEAB
OEAB
CLKENBA
LEBA
OEBA
TDI
TMS
TCK
B1
TDO
V
CC
V
CC
1 of 20 Channels
CLKAB
CLKBA
53
58
22
27
23
28
54
59
55
60
62
24
56
26
V
CC
V
CC
Pin numbers shown are for the PM package.