SNJ54ACT8990

The SNJ54ACT8990 test-bus controllers (TBC) are members of the Texas Instruments SCOPE 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 SCOPE integrated circuits. Their function is to control the JTAG serial-test bus rather than being target boundary-scannable devices.

Features of the SNJ54ACT8990 are:(1)Members of the Texas Instruments SCOPE Family of Testability Products; (2)Compatible With the IEEE Standard 1149.1-1990 (JTAG) Test Access Port and Boundary-Scan Architecture; (3)Control Operation of Up to Six Parallel Target Scan Paths; (4)Accommodate Pipeline Delay to Target of Up to 31 Clock Cycles; (5)Scan Data Up to 232 Clock Cycles; (6)Execute Instructions for Up to 232 Clock Cycles; (7)Each Device Includes Four Bidirectional Event Pins for Additional Test Capability; (8)Inputs Are TTL-Voltage Compatible; (9)EPIC (Enhanced-Performance Implanted CMOS) 1-m Process; (10)Packaged in 44-Pin Plastic Leaded Chip Carrier (FN), 68-Pin Ceramic Pin Grid Array (GB), and 68-Pin Ceramic Quad Flat Packages (HV).

The absolute maximum ratings of the SNJ54ACT8990 can be summarized as:(1)Supply voltage range, VCC: 0.5 V to 7 V; (2)Input voltage range, VI: 0.5 V to VCC; (3)Output voltage range, VO (see Note 1) 0.5 V to VCC; (4)Input clamp current, IIK (VI < 0 or VI > VCC):±20 mA; (5)Output clamp current, IOK (VO < 0 or VO > VCC):±20 mA; (6)Continuous output current, IO (VO = 0 to VCC) :±25 mA; (7)Maximum power dissipation at TA = 55°C (in still air): FN package :1.5W ; (8)Storage temperature range, Tstg :65°C to 150°C.

The electrical characteristics(Ta=25) of the SNJ54ACT8990 can be summarized as:(1)VCC:4.5V MIN 5.5V MAX;(2)VI:0V MIN VCCV MAX.If you want to know more information such as the electrical characteristics ,please download the datasheet in www.seekdatasheet.com .