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SN74ACT8990 具有 16 位通用主机接口的测试总线控制器 IEEE Std 1149.1 (JTAG) TAP 主控方

The 'ACT8990 test-bus controllers (TBC) are members of the Texas Instruments SCOPETM testability integrated-circuit family. This family of components supports IEEE Standard 1149.1-1990 (JTAG) boundary scan to facilitate testing of complex circuit-board assemblies. The 'ACT8990 differ from other SCOPETM integrated circuits. Their function is to control the JTAG serial-test bus rather than being target boundary-scannable devices.

The required signals of the JTAG serial-test bus - test clock (TCK), test mode select (TMS), test data input (TDI), and test data output (TDO) can be connected from the TBC to a target device without additional logic. This is done as a chain of IEEE Standard 1149

SN74ACT8990
Voltage Nodes(V) 5
Vcc range(V) 4.5 to 5.5
Input Level TTL
Output Level CMOS
Rating Catalog
Technology Family JTAG
SN74ACT8990 特性
SN74ACT8990 芯片订购指南
器件 状态 温度 价格(美元) 封装 | 引脚 封装数量 | 封装载体 丝印标记
SN74ACT8990FN ACTIVE -40 to 85 25.74 | 1ku PLCC (FN) | 44 26 | TUBE  
SN74ACT8990FNR ACTIVE -40 to 85 25.74 | 1ku PLCC (FN) | 44 500 | LARGE T&R  
SN74ACT8990 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
SN74ACT8990FN Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR SN74ACT8990FN SN74ACT8990FN
SN74ACT8990FNR Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR SN74ACT8990FNR SN74ACT8990FNR
SN74ACT8990 应用技术支持与电子电路设计开发资源下载
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