74HC165D

Shift Registers Overview

The Toshiba Semiconductor and Storage 74HC165D is an 8-bit parallel-in/serial-out shift register manufactured using high-speed silicon-gate CMOS technology. It operates within a supply voltage range of 2V to 6V and features asynchronous parallel loading via the PL input, allowing immediate data capture from D0 to D7. The device supports synchronous serial shifting through the DS input on positive clock transitions at CP. Complementary serial outputs are available at Q7 and !Q7. It utilizes a 16-pin SOIC surface-mount package and complies with JEDEC JESD-7A standards while maintaining pin compatibility with Low-Power Schottky TTL (LSTTL) logic families.

Shift Registers Feature Summary

• Asynchronous parallel loading capability for immediate data capture independent of clock signals
• Synchronous serial shifting operation triggered by positive-going clock edges
• Complementary dual serial outputs providing both true and inverted data streams
• Gated OR clock structure enabling flexible clock enable control

Shift Registers Applications

• Microcontroller I/O expansion for connecting multiple switches or sensors
• Keyboard matrix scanning systems requiring reduced pin usage
• Industrial control interfaces for digitizing parallel status inputs
• Data acquisition systems converting parallel sensor data to serial streams

Shift Registers Procurement Notes

Verify the manufacturer marking matches Toshiba Semiconductor and Storage specifications. Confirm the suffix indicates the standard SOIC-16 package variant. Ensure compliance with RoHS directives if required for your assembly process. Check datasheet revisions for any updates to electrical characteristics or mechanical dimensions before finalizing procurement.

Shift Registers Selection Notes

Select this component when interfacing microcontrollers with parallel input devices to minimize GPIO consumption. The 74HC series ensures compatibility with standard 5V and 3.3V logic levels. Consider the complementary output feature if signal inversion is needed without additional gates. Verify that the operating temperature range meets your environmental requirements.

Shift Registers Part Context

This device belongs to the 74HC family of high-speed CMOS logic integrated circuits. It serves as a fundamental building block for digital systems requiring data serialization. The 74HC165D is widely used in embedded systems where efficient use of processor pins is critical for cost and complexity reduction.

Shift Registers Replacement Considerations

Compatible substitutes include Nexperia 74HC165D and NXP 74HC165D. These alternatives share identical logical functions and pinouts but may differ in specific electrical parameters or packaging tolerances. Always verify absolute maximum ratings and thermal characteristics before substitution.