M74HC165TTR

Shift Registers Overview

The M74HC165TTR is an 8-bit parallel-in serial-out (PISO) shift register fabricated with silicon gate C2MOS technology. It operates within a supply voltage range of 2V to 6V and features asynchronous parallel data entry when the Shift/Load input is low. The device includes two clock inputs that function identically, allowing one to serve as a clock inhibit via a NOR gate structure. Complementary serial outputs are available at QH and Q̅H. It provides high noise immunity and symmetrical output impedance.

Shift Registers Feature Summary

• Asynchronous parallel loading capability for immediate data capture
• Dual identical clock inputs supporting flexible clocking or inhibition logic
• Complementary serial outputs providing both true and inverted signals
• Built-in protection circuits against static discharge and transient excess voltage

Shift Registers Applications

• Parallel-to-serial data conversion in communication systems
• Expansion of microcontroller input ports for keypad scanning
• Data acquisition systems requiring multiple digital inputs
• Industrial control interfaces for sensor arrays

Shift Registers Procurement Notes

Verify the ordering code matches the specific package variant required, such as TSSOP for the M74HC165TTR designation. Confirm operating temperature ranges align with environmental specifications, noting limits up to 125°C. Ensure power supply voltages remain strictly within the 2V to 6V operational window to maintain functional integrity and prevent damage beyond absolute maximum ratings.

Shift Registers Selection Notes

Select this component when synchronous serial shifting combined with asynchronous parallel loading is necessary. Consider its wide operating voltage range suitable for various logic families. Evaluate the propagation delay characteristics relative to system clock speeds. Verify pin compatibility with existing 74 series designs if migrating from older technologies.

Shift Registers Part Context

This device belongs to the STMicroelectronics HC logic family, utilizing high-speed CMOS technology. It is functionally compatible with standard 74 series 165 devices. The TTR suffix indicates tape and reel packaging, typically used for automated surface-mount assembly processes. It falls under general-purpose logic integrated circuits designed for robust digital signal processing applications.

Shift Registers Replacement Considerations

Compatible replacements include other manufacturers' 74HC165 variants offering identical pinouts and logical functions. Verify equivalent electrical parameters such as propagation delay and supply current before substitution. Ensure any alternative part supports the same TSSOP-16 package dimensions for mechanical interchangeability.