MM74HC165MTCX

Shift Registers Overview

The MM74HC165MTCX is a parallel-in/serial-out 8-bit shift register from the onsemi 74HC logic family, housed in a 16-lead TSSOP package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40 °C to +85 °C. The device features a maximum propagation delay of 25 ns at 5 V with 15 pF load, a maximum quiescent supply current of 80 μA, and a typical fanout of 10 LS-TTL loads. Data transfer occurs on the positive clock edge, with parallel loading enabled by a low Shift/Load input.

Shift Registers Feature Summary

• Parallel-in/Serial-out architecture with complementary QH output
• Gated clock input allowing clock inhibit functionality via NOR gate
• Direct parallel data loading independent of clock state when Shift/Load is low
• Static discharge protection via internal diode clamps to VCC and ground

Shift Registers Applications

• Data acquisition systems requiring serial conversion of parallel inputs
• Keyboard scanning matrices for microcontroller interfaces
• Expansion of I/O ports in digital control circuits
• Serial communication interface buffering

Shift Registers Procurement Notes

Verify the specific ordering suffix 'X' indicates tape and reel packaging as documented in the datasheet. Confirm the manufacturer origin, noting that while distributed by onsemi, the device was originally specified by Fairchild Semiconductor. Ensure the TSSOP-16 package variant matches the required footprint dimensions of 4.4mm width. Cross-reference RoHS compliance status through official material composition documents prior to integration.

Shift Registers Selection Notes

Select this component for applications requiring high-speed serial shifting with low power consumption. The 74HC series offers pin-out compatibility with standard 74LS logic families, facilitating direct replacement in legacy designs. Consider the 2–6 V operating range for flexibility in varying supply environments. The gated clock feature provides additional control over timing sequences compared to devices without clock inhibition capabilities.

Shift Registers Part Context

This part belongs to the MM74HC165 series of 8-bit shift registers. It is functionally compatible with other 74HC logic devices but distinct from the MM74HC164 (serial-in) or MM74HC595 (serial-in/parallel-out). The TSSOP package variant provides a compact surface-mount solution suitable for space-constrained PCB layouts while maintaining electrical performance standards defined for the HC logic family.

Shift Registers Replacement Considerations

MM74HC165MTC