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5962-9172801QLA Datasheet

  • 5962-9172801QLA

  • SCAN TEST DEVICES WITH OCTAL BUS TRANSCEIVERS

  • 484.62KB

  • 27頁

  • TI

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SN54BCT8245A, SN74BCT8245A
SCAN TEST DEVICES
WITH OCTAL BUS TRANSCEIVERS
SCBS043E 鈥?MAY 1990 鈥?REVISED JULY 1996
D
D
D
D
D
D
D
D
Members of the Texas Instruments
SCOPE
鈩?/div>
Family of Testability Products
Octal Test-Integrated Circuits
Functionally Equivalent to 鈥橣245 and
鈥橞CT245 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
鈩?/div>
Instruction Set
鈥?IEEE Standard 1149.1-1990 Required
Instructions, Optional INTEST, CLAMP,
and HIGHZ
鈥?Parallel-Signature Analysis at Inputs
鈥?Pseudo-Random Pattern Generation
From Outputs
鈥?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)
SN54BCT8245A . . . JT PACKAGE
SN74BCT8245A . . . DW OR NT PACKAGE
(TOP VIEW)
DIR
B1
B2
B3
B4
GND
B5
B6
B7
B8
TDO
TMS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
OE
A1
A2
A3
A4
A5
V
CC
A6
A7
A8
TDI
TCK
SN54BCT8245A . . . FK PACKAGE
(TOP VIEW)
description
The 鈥橞CT8245A scan test devices with octal bus
transceivers are members of the Texas
Instruments SCOPE鈩?testability integrated-
circuit 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.
A2
A1
OE
NC
DIR
B1
B2
5
6
7
8
9
A3
A4
A5
NC
V
CC
A6
A7
4
3 2 1 28 27 26
25
24
23
22
21
10
20
11
19
12 13 14 15 16 17 18
A8
TDI
TCK
NC
TMS
TDO
B8
NC 鈥?No internal connection
In the normal mode, these devices are functionally equivalent to the 鈥橣245 and 鈥橞CT245 octal bus transceivers.
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 SCOPE鈩?octal bus transceivers.
In the test mode, the normal operation of the SCOPE鈩?octal bus transceivers 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.
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.
SCOPE is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is 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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
B3
B4
GND
NC
B5
B6
B7
Copyright
漏
1996, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1

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