SN74HCS16507DR

Shift Registers Overview

The SN74HCS16507DR is an 8-bit parallel-load shift register manufactured by Texas Instruments in a 16-pin SOIC package. It operates on a supply voltage range of 2 V to 6 V and supports ambient temperatures from -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and open-drain outputs capable of driving up to 7.8 mA at 6 V. Propagation delay ranges from 17 ns to 65 ns depending on voltage, with maximum switching frequencies reaching 170 MHz.

Shift Registers Feature Summary

• Schmitt-trigger inputs provide high tolerance to slow or noisy input signals
• Open-drain CMOS outputs allow for wired-AND configurations and flexible drive levels
• Low power consumption with typical supply current of 100 nA

Shift Registers Applications

• Increasing the number of inputs available to a microcontroller
• Cascading multiple units to expand system data input capacity
• Serial-to-parallel data conversion in peripheral interfaces

Shift Registers Procurement Notes

Verify the specific 'DR' suffix indicates the SOIC-16 package variant when sourcing. Confirm that the open-drain output configuration aligns with your load requirements, as these outputs require external pull-up resistors for high-state logic levels. Ensure the operating temperature range meets your environmental specifications.

Shift Registers Selection Notes

Select this component when high-speed serial shifting is required alongside robust noise immunity provided by Schmitt triggers. The open-drain architecture is suitable for interfacing with different voltage domains via pull-ups. Consider the 16-pin SOIC form factor for standard surface-mount assembly processes.

Shift Registers Part Context

This device belongs to the SN74HCS series, characterized by HCMOS performance with low power consumption. It serves as a parallel-input, serial-output shift register designed for expanding digital input capabilities in embedded systems and industrial control applications requiring reliable signal integrity.

Shift Registers Replacement Considerations

Check for pin-compatible alternatives within the same HCS family. Verify that any substitute maintains the open-drain output structure and Schmitt-trigger input characteristics to ensure functional equivalence without circuit redesign.

Shift Registers FAQ

How do unused inputs behave on this device?

Unused inputs must not be left floating; they should be tied to either VCC or ground to prevent undefined operational states.

What is the function of the CLK INH pin?

The Clock Inhibit (CLK INH) input prevents clock pulses from being detected when held high, effectively pausing the shifting operation.