74HC166N,652

Shift Registers Overview

The 74HC166N,652 is an 8-bit parallel-in/serial-out shift register manufactured by NXP USA Inc. It operates within 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 eight parallel data inputs (D0 to D7), a serial data input (DS), and a serial output (Q7). Control functions include a clock enable (CE) input, a parallel enable (PE) input, and an asynchronous master reset (MR). Data loading occurs on the LOW-to-HIGH transition of the clock input (CP).

Shift Registers Feature Summary

• Supports synchronous parallel-to-serial applications with easy expansion via synchronous serial input.
• Includes input clamp diodes allowing interface to voltages exceeding VCC using current limiting resistors.
• Provides ESD protection exceeding 2000 V according to HBM JESD22-A114E standards.

Shift Registers Applications

• Synchronous parallel-to-serial data conversion
• Expansion of serial data streams
• Input scanning for microprocessor systems

Shift Registers Procurement Notes

Verify the specific ordering suffix '652' against the manufacturer's official documentation to confirm package type and temperature range specifications. Ensure compatibility with system voltage levels and environmental operating conditions before procurement.

Shift Registers Selection Notes

Select this component when an 8-bit parallel-to-serial conversion capability is required in CMOS logic families. Consider the DIP16 package availability and the specified operating temperature range of -40 °C to +125 °C for industrial or automotive environments.

Shift Registers Part Context

This part belongs to the 74HC166 family of 8-bit parallel-in/serial-out shift registers. It is designed for use in digital logic circuits requiring data serialization. The device complies with JEDEC standard no. 7A for CMOS logic devices.

Shift Registers Replacement Considerations

Check for direct pin-compatible alternatives such as the 74HCT166N variant if TTL-level inputs are required instead of CMOS levels. Verify that any substitute maintains the same DIP16 package form factor and extended temperature range capabilities.