Datasheet

SN54LVTH18646A, SN54LVTH182646A, SN74LVTH18646A, SN74LVTH182646A
3.3-V ABT SCAN TEST DEVICES
WITH 18-BIT TRANSCEIVERS AND REGISTERS
SCBS311D – MARCH 1994 – REVISED JUNE 1997
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
Boundary-Scan Register
One of Nine Channels
1OE
1DIR
1CLKBA
1SBA
1CLKAB
1SAB
1A1
1B1
1D
C1
1D
C1
One of Nine Channels
2OE
2DIR
2CLKBA
2SBA
2CLKAB
2SAB
2A1
2B1
1D
C1
1D
C1
Boundary-Control
Register
Instruction
Register
TDI
TMS
TCK
TDO
TAP
Controller
V
CC
V
CC
Bypass Register
Identification
Register
62
53
55
54
59
60
63
21
30
27
28
23
22
10
24
56
26
51
40
58
V
CC
V
CC
Pin numbers shown are for the PM package.