SN54LVTH18514, SN54LVTH182514, SN74LVTH18514, SN74LVTH182514

3.3-V ABT SCAN TEST DEVICES

WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS

SCBS670C – AUGUST 1996 – REVISED MARCH 1998

1

POST OFFICE BOX 655303

SCOPE

™ Family of Testability Products

Mixed-Mode Signal Operation (5-V Input

Down to 2.7 V

Combines D-Type Latches and D-Type

Flip-Flops for Operation in Transparent,

Latched, or Clocked Mode

Need for External Pullup/Pulldown

Resistors

Have Equivalent 25-

Ω Series Resistors, So

No External Resistors Are Required

(JTAG) Test Access Port and

Boundary-Scan Architecture

– IEEE Std 1149.1-1990 Required

Instructions and Optional CLAMP and

HIGHZ

– Parallel-Signature Analysis at Inputs

– Pseudo-Random Pattern Generation

From Outputs

– Sample Inputs/Toggle Outputs

– Binary Count From Outputs

– Device Identification

– Even-Parity Opcodes

Thin Shrink Small-Outline (DGG) and 64-Pin

Ceramic Dual Flat (HKC) Packages Using

0.5-mm Center-to-Center Spacings

description

The ’LVTH18514 and ’LVTH182514 scan test devices with 20-bit universal bus transceivers are members of

the TI SCOPE testability integrated-circuit family. This family of devices supports IEEE Std 1149.1-1990

boundary scan to facilitate testing of complex circuit-board assemblies. Scan access to the test circuitry is

accomplished via the 4-wire test access port (TAP) interface.

capability to provide a TTL interface to a 5-V system environment.

Copyright

© 1998, Texas Instruments Incorporated

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information current as of publication date. Products conform to

specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all

parameters.

SCOPE, Widebus, UBT, and TI are trademarks of Texas Instruments Incorporated.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SN54LVTH18514, SN54LVTH182514 . . . HKC PACKAGE

SN74LVTH18514, SN74LVTH182514 . . . DGG PACKAGE

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LEBA

OEBA

A1

A2

A3

GND

A4

A5

A6

A7

A8

A9

GND

A10

A11

A12

A13

GND

A14

A15

A16

A17

A18

A19

GND

A20

CLKENAB

CLKAB

TDO

TMS

CLKBA

CLKENBA

B1

B2

B3

GND

B4

B5

B6

B7

B8

B9

GND

B10

B11

B12

B13

GND

B14

B15

B16

B17

B18

B19

GND

B20

OEAB

LEAB

TDI

TCK