SN74HCS259PWR

Overview

The SN74HCS259PWR is an 8-bit addressable latch from the HCS logic family, manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an extended ambient temperature range from -40°C to +125°C. The device features Schmitt-trigger inputs for noise tolerance and balanced CMOS push-pull outputs capable of driving ±7.8 mA at 6 V. It utilizes a 16-pin TSSOP package with dimensions of 5.00 mm x 4.40 mm.

Feature Summary

• Schmitt-trigger inputs provide high noise immunity and support slow or noisy input signals
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking current capabilities
• Low power consumption with typical supply current of 100 nA and input leakage of ±100 nA
• Extended operating temperature range suitable for demanding environments

Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data in digital systems

Procurement Notes

Verify that the ordering suffix PWR corresponds specifically to the TSSOP-16 package variant. Confirm the component meets the extended temperature requirements if operating near the upper limit of 125°C. Ensure proper ESD handling protocols are followed during installation due to the sensitivity of CMOS inputs. Cross-reference the datasheet revision history for any recent design changes affecting pinout or electrical characteristics.

Selection Notes

Select this component when noise immunity is critical due to its Schmitt-trigger architecture. It is suitable for general-purpose storage, working registers, and serial-holding registers. Consider the balanced output drive capability for driving larger currents compared to standard CMOS devices. Verify that the 2 V to 6 V supply range aligns with the system's power rails.

Part Context

This part belongs to the SN74HCS259 series of 8-bit addressable latches. It is designed for multifunctional applications including acting as a 1-of-8 decoder or demultiplexer with active-high outputs. The device allows storing single-line data in eight addressable latches and offers four distinct modes of operation controlled by clear and enable inputs.

Replacement Considerations

SN74HCS259PW

FAQ

What is the primary benefit of the Schmitt-trigger inputs?

They allow the device to tolerate slow or noisy input signals effectively.

Can unused inputs be left floating?

No, all unused inputs must be connected to either VCC or ground to prevent undefined operational states.