SN54BCT8373A

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input voltage range, VI: Except TMS (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . ...0.5 V to 7 V
                                       TMS (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 12 V
Voltage range applied to any output in the disabled or power-off state . . . . . . . .0.5 V to 5.5 V
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC
Input clamp current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 mA
Current into any output in the low state: SN54BCT8373A (TDO) . . . . . . . . . . . . . . . . . . . . ..40 mA
                                                                 SN54BCT8373A (Any Q) . . . . . . . . . . . . . . . . . . . . 96 mA
                                                                 SN74BCT8373A (TDO) . . . . . . . . . . . . . . . . . . . . .. 48 mA
                                                                 SN74BCT8373A (Any Q) . . . . . . . . . . . . . . . . . . . .128 mA
Maximum power dissipation at TA = 55 (in still air) (see Note 2): DW package . . . . . . . . . . 1.7 W
                                                                                                         NT package . . . . . . . . . . .1.3 W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...65to 150
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. The input voltage rating may be exceeded if the input clamp-current rating is observed.
             2. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils, except for the NT package, which has a trace length of zero. For more information, refer to the Package Thermal Considerations application note in the ABT Advanced BiCMOS Technology Data Book, literature number SCBD002.

The SN54BCT8373A scan test devices with octal D-type latches are members of the Texas Instruments SCOPEE^TM testability integratedcircuit family. SN54BCT8373A 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, SN54BCT8373A is functionally equivalent to the 'F373 and 'BCT373 octal D-type latches. The test circuitry can be activated by the TAP to take snapshot samples of the data appearing at the SN54BCT8373A 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 SCOPEE^TM octal latches.

In the test mode, the normal operation of the SCOPEE^TM octal latches is inhibited and the test circuitry of SN54BCT8373A is enabled to observe and control the I/O boundary of the SN54BCT8373A. When enabled, the test circuitry can perform boundary scan test operations, as described in IEEE Standard 1149.1-1990.