SN54LVTH18652A, SN54LVTH182652A, SN74LVTH18652A, SN74LVTH182652A

3.3-V ABT SCAN TEST DEVICES

WITH 18-BIT TRANSCEIVERS AND REGISTERS

SCBS312C – MARCH 1994 – REVISED JUNE 1997

5

POST OFFICE BOX 655303

functional block diagram

Boundary-Scan Register

One of Nine Channels

1OEAB

1OEBA

1CLKBA

1SBA

1CLKAB

1SAB

1A1

1B1

1D

C1

1D

C1

One of Nine Channels

2OEAB

2OEBA

2CLKBA

2SBA

2CLKAB

2SAB

2A1

2B1

1D

C1

1D

C1

Boundary-Control

Register

Instruction

Register

TDI

TMS

TCK

TDO

TAP

Controller

VCC

VCC

Bypass Register

Identification

Register

53

62

55

54

59

60

63

30

21

27

28

23

22

10

24

56

26

51

40

58

VCC

GND

VCC

GND

Pin numbers shown are for the PM package.