Octal transparent latch for 5V bus isolation
The Texas Instruments SN74ALS373ADWR is an octal D-type transparent latch with tri-state outputs from the 74ALS family. It holds eight bits of data when the latch-enable signal goes low, and the tri-state outputs let multiple devices share a common bus without contention. Typical applications include address/data latching in microprocessor systems, bus isolation buffers, and register storage in 5V logic boards — think office equipment, telecom line cards, and benchtop instrumentation where the 0°C to 70°C commercial temperature range fits.
Lifecycle and sourcing
SN74ALS373ADWR is listed as Active with ROHS3 compliance. No imminent end-of-life notice on this line. For dual-sourcing considerations, the 74FCT573APC from the 74FCT series offers a functionally similar D-type transparent latch but in a through-hole package and with an 8.5ns propagation delay; the pinout is not guaranteed compatible, so verify the footprint before substituting.