Members of the Texas Instruments

SCOPE E Family of Testability Products

Octal Test-Integrated Circuits

Functionally Equivalent to ’F373 and

BCT373 in the Normal-Function Mode

Compatible With the IEEE Standard

1149.1-1990 (JTAG) Test Access Port and

Boundary-Scan Architecture

Test Operation Synchronous to Test

Access Port (TAP)

Implement Optional Test Reset Signal by

Recognizing a Double-High-Level Voltage

10 V) on TMS Pin

SCOPE E Instruction Set

– IEEE Standard 1149.1-1990 Required

Instructions, Optional INTEST, CLAMP,

and HIGHZ

– Parallel Signature Analysis at Inputs

– Pseudo-Random Pattern Generation

From Outputs

– Sample Inputs/Toggle Outputs

Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic

and Ceramic 300-mil DIPs (JT, NT)

description

The ’BCT8373A scan test devices with octal

D-type latches are members of the Texas

Instruments SCOPEE testability integratedcircuit

family. This family of devices supports IEEE

Standard 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.

In the normal mode, these devices are functionally equivalent to the ’F373 and ’BCT373 octal D-type latches.

The test circuitry can be activated by the TAP to take snapshot samples of the data appearing at the device

terminals or to perform a self test on the boundary test cells. Activating the TAP in normal mode does not affect

the functional operation of the SCOPEE octal latches.

In the test mode, the normal operation of the SCOPEE octal latches is inhibited and the test circuitry is enabled

to observe and control the I/O boundary of the device. When enabled, the test circuitry can perform boundary

scan test operations, as described in IEEE Standard 1149.1-1990.