SN74BCT8245A中文资料具有八路总线收发器的 IEEE 标准 1149.1 (JTAG) 边界扫描测试设备数据手册TI规格书

描述 Description

The 'BCT8245A scan test devices with octal bus transceivers are members of the Texas Instruments SCOPETM 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.
In the normal mode, these devices are functionally equivalent to the 'F245 and 'BCT245 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 SCOPETM octal bus transceivers.
In the test mode, the normal operation of the SCOPETM 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.
 
Four dedicated test terminals control the operation of the test circuitry: test data input (TDI), test data output (TDO), test mode select (TMS), and test clock (TCK). Additionally, the test circuitry performs other testing functions such as parallel-signature analysis (PSA) on data inputs and pseudo-random pattern generation (PRPG) from data outputs. All testing and scan operations are synchronized to the TAP interface.
The SN54BCT8245A is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74BCT8245A is characterized for operation from 0°C to 70°C.

特性 Features

• Members of the Texas Instruments SCOPETM Family ofTestability Products
• Octal Test-Integrated Circuits
• Functionally Equivalent to 'F245 and 'BCT245 in the Normal-Function Mode
• Compatible With the IEEE Standard 1149.1-1990 (JTAG) TestAccess Port and Boundary-Scan Architecture
• Test Operation Synchronous to Test Access Port (TAP)
• Implement Optional Test Reset Signal by Recognizing aDouble-High-Level Voltage (10 V) on TMS Pin
• SCOPETM 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 Ceramic300-mil DIPs (JT, NT)  SCOPE is a trademark of Texas Instruments Incorporated.

简介

SN74BCT8245A属于集成电路（IC）的专用逻辑器件。由TI制造生产的SN74BCT8245A专用逻辑器件专用逻辑 IC 设计提供应用特定的逻辑输出类型，例如 BCD 速率倍增、可寻址扫描端口、总线终端阵列、CML 驱动器、比较器、ABT 扫描测试、二进制全加法器、互补对加逆变器、可配置缓冲器、触点颤动消除器、晶体振荡器、延迟元件、差分接收器、LVTTL 到 GTLP 收发器、存储器解码器、电源良好检测器和分频器。