74VHC595SJ

Shift Registers Overview

The Fairchild Semiconductor 74VHC595SJ is an advanced high-speed CMOS 8-bit shift register with output latches, fabricated using silicon gate CMOS technology. It features a serial-in, parallel-out architecture where the shift register feeds an 8-bit D-type storage register equipped with 3-state outputs. The device supports cascading via a serial output pin and includes direct overriding clear functionality. Separate positive edge-triggered clocks are provided for the shift and storage registers. It offers symmetrical output impedance and balanced propagation delays, maintaining low power dissipation while achieving high-speed operation comparable to equivalent Bipolar Schottky TTL.

Shift Registers Feature Summary

• Advanced high-speed CMOS fabrication enabling performance similar to Bipolar Schottky TTL with low power consumption
• 8-bit serial-in, parallel-out shift register feeding an 8-bit D-type storage register with 3-state outputs
• Separate positive edge-triggered clocks for shift and storage registers with direct overriding clear input
• Integrated protection circuits against static discharge and transient excess voltage on all inputs

Shift Registers Applications

• High-speed data acquisition systems requiring serial-to-parallel conversion
• Cascaded LED display drivers utilizing multiple units for expanded output capacity
• Industrial control interfaces needing isolated or buffered parallel data outputs
• Communication equipment requiring reliable serial data shifting with latch capabilities

Shift Registers Procurement Notes

Verify the specific suffix SJ corresponds to the tape and reel packaging format as indicated by distributor listings. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the operating temperature range aligns with your system's environmental specifications. Cross-reference the manufacturer part number with the current datasheet revision to confirm pinout and electrical characteristics remain unchanged from previous versions.

Shift Registers Selection Notes

Select this component when high-speed shifting is required alongside low power dissipation typical of CMOS logic. The 3-state outputs allow for bus-oriented connections, making it suitable for multiplexed data lines. Consider the separate clock inputs if precise timing control between shifting and latching operations is necessary. Verify compatibility with your system's supply voltage range, typically 2V to 6V, and ensure noise immunity requirements are met by the specified VNIH/VNIL margins.

Shift Registers Part Context

This device belongs to the 74VHC series, which represents advanced high-speed CMOS logic. It is functionally compatible with the standard 74HC595 but offers improved speed performance. The 74VHC series is designed to bridge the gap between standard CMOS and faster bipolar technologies, providing significant speed improvements while retaining the low power advantages of CMOS processes. It is widely used in applications demanding rapid data processing with minimal energy consumption.

Shift Registers Replacement Considerations

Direct substitutes include the M74HC595 and SN74HC595, though these offer lower speed performance. For equivalent high-speed operation, consider the Nexperia 74VHC595 or ON Semiconductor 74VHC595 variants. Verify package compatibility, as the SJ suffix indicates a specific surface-mount configuration. Ensure that any replacement maintains the 3-state output capability and separate clock inputs if those features are critical to the design.