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
- Members of the Texas Instruments SCOPETM Family of Testability Products
- Compatible With the IEEE Standard 1149.1-1990 (JTAG) Test Access Port and Boundary-Scan Architecture
- Control Operation of Up to Six Parallel Target Scan Paths
- Accommodate Pipeline Delay to Target of Up to 31 Clock Cycles
- Scan Data Up to 232 Clock Cycles
- Execute Instructions for Up to 232 Clock Cycles
- Each Device Includes Four Bidirectional Event Pins for Additional Test Capability
- Inputs Are TTL-Voltage Compatible
- EPICTM (Enhanced-Performance Implanted CMOS) 1-
m Process
- Packaged in 44-Pin Plastic Leaded Chip Carrier (FN), 68-Pin Ceramic Pin Grid Array (GB), and 68-Pin Ceramic Quad Flat Packages (HV)
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
- SN74ACT8990 数据资料 dataSheet 下载.PDF
- TI 德州仪器特殊逻辑产品选型与价格 . xls
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)