8-bit shift register with open-drain outputs — 2V to 6V supply
The SN74HCS596PWR is an 8-bit serial-in, parallel-out shift register from Texas Instruments' 74HCS family, with open-drain outputs on all eight bits. This output stage lets multiple register outputs connect to a common bus line without external buffer logic — each output sinks current independently, and the bus floats high when all outputs are off. The -40°C to 125°C operating temperature range (TA) means the part works in engine-bay electronics, outdoor telecom cabinets, or industrial ovens where 85°C industrial-grade parts would derate. This is a full 125°C junction temperature — not a 105°C or 85°C industrial part dressed up. The shift register clocks data in on the rising edge of the shift clock and latches it to the output register on the rising edge of the storage register clock. Because the outputs are open-drain, the latch does not fight a weak pull-up — the output state is high-impedance until the pull-up resistor defines the logic level, making it suitable for multiplexed LED displays, relay drivers, or any load where the high side is a shared rail.
16-TSSOP footprint and board integration
The narrow body conserves board space — about 30% less area than a 16-SOIC equivalent. The supplier device package (16-TSSOP) matches the package/case (16-TSSOP (0.173", 4.40mm Width)), so there is no ambiguity between the JEDEC MO-153 and the TI ordering code. The 74HCS family uses Schmitt-trigger inputs on all logic pins, which provides noise immunity on long PCB traces or in electrically noisy environments — a detail that matters when the shift register clocks from a distant microcontroller.
Active lifecycle and compliance documentation
ROHS3 compliant; no REACH, UL, or IEC documentation is referenced in the listing, but TI typically provides full REACH and conflict-minerals declarations on request per the standard TI compliance workflow. For a high-temperature shift register with open-drain outputs, the active lifecycle means no rush to qualify an alternative. The 74HCS series is a recent addition to TI's logic portfolio (Schmitt-trigger inputs, wider supply range vs older 74HC parts), so obsolescence risk is low for the foreseeable future.