74HC194DB,118

Shift Registers Overview

The Nexperia 74HC194DB,118 is a 4-bit bidirectional universal shift register housed in an SSOP-16 (SOT338-1) package. It operates on a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features synchronous parallel load capability via D0-D3 inputs, serial data entry through DSL and DSR, and mode selection using S0 and S1. An asynchronous master reset (MR) forces outputs LOW independently of the clock. Propagation delays vary with voltage, reaching up to 44 ns at 4.5 V.

Shift Registers Feature Summary

• Bidirectional shifting capability allowing left or right data movement based on mode control inputs
• Synchronous parallel loading of four bits alongside serial data transfer functions
• Asynchronous master reset overriding all other input conditions to clear outputs
• Hold mode retaining existing data without requiring clock transitions

Shift Registers Applications

• Data storage and buffering applications
• Serial-to-parallel and parallel-to-serial conversion circuits
• Digital signal processing systems requiring data manipulation
• Control logic for sequential operations

Shift Registers Procurement Notes

Verify the specific ordering suffix

Shift Registers Selection Notes

Select this component when a compact 4-bit shift register with bidirectional capabilities is required. Ensure the design accommodates the specified voltage range and temperature extremes. Consider the SSOP-16 package dimensions for PCB layout constraints. Verify that the application does not require automotive qualification, as this standard version lacks AEC-Q100 certification.

Shift Registers Part Context

This part belongs to the Nexperia 74HC series of high-speed CMOS logic devices. It implements the standard 74HC194 functionality within a plastic shrink small outline package. The device is designed for general-purpose digital logic applications where low power consumption and high noise immunity are prioritized over automotive-grade reliability specifications.

Shift Registers Replacement Considerations

Direct pin-compatible replacements include other manufacturers' 74HC194 variants in SSOP-16 packages. Verify functional equivalence regarding propagation delays and output drive currents before substitution.