SN74HC259NG4

Overview

The SN74HC259NG4 is an 8-bit addressable latch manufactured by Texas Instruments, belonging to the HC logic family. It features a single serial-in/parallel-out shift register configuration with non-inverting outputs. The device operates within a supply voltage range of 2 V to 6 V and utilizes a 16-pin PDIP package for through-hole mounting. Key electrical parameters include a propagation delay of 130 ns at 2 V, 26 ns at 4.5 V, and 22 ns at 6 V. Static current consumption is specified at 8 uA, with low-level output current capability of 32 mA and high-level output current of -5.2 mA.

Feature Summary

• Provides 8-bit addressable latching functionality via serial input and parallel output architecture
• Features non-inverting outputs suitable for direct interface applications
• Operates reliably across standard industrial temperature ranges

Applications

• Digital data storage systems requiring addressable memory elements
• Parallel-to-serial conversion circuits in communication interfaces
• Microcontroller peripheral expansion for I/O control

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS adherence as per Texas Instruments documentation. Confirm package type matches the required 16-pin DIP form factor for your PCB layout. Ensure supply voltage levels remain within the 2 V to 6 V operational range to maintain signal integrity and prevent device damage during operation.

Selection Notes

Select this component when an 8-bit addressable latch is required in a through-hole design. The HC series offers compatibility with standard CMOS logic families. Consider the propagation delay specifications relative to your system clock speed. Verify that the 32 mA low-level sink current meets the load requirements of connected downstream components without exceeding thermal limits.

Part Context

This part belongs to the SN74HC259 series of 8-bit addressable latches from Texas Instruments. It serves as a digital storage element where individual outputs can be selected and updated independently via address inputs. The HC technology ensures low power consumption while maintaining high-speed performance compared to older LS or ALS logic families.

Replacement Considerations

SN74HC259N: Standard equivalent without explicit lead-free designation in all contexts. SN74HC259NE4: Lead-free version with identical electrical characteristics. CD74HC259E: Alternative variant with potentially different temperature ratings.