Home > Industry Information > CD74HC165M
The CD74HC165M is a classic 8-bit parallel-in/serial-out shift register from the 74HC series of high-speed CMOS logic chips, manufactured by Texas Instruments. Fully compatible with the industry-standard 74HC165, its core function is to efficiently convert multiple parallel digital input signals into a single serial output stream under clock control. With its wide operating voltage range of 2V to 6V and an exceptional operating temperature range of -55°C to 125°C, this device provides a highly reliable and adaptable fundamental solution for expanding microcontroller I/O ports and simplifying multi-channel data acquisition. It is particularly suited for applications with demanding environmental requirements.
Category:Integrated Circuits (ICs);Logic;Shift Registers
Manufacturer:Texas Instruments
Series:74HC
Packaging:Tube
Number of Elements:1
Number of Bits per Element:8
Function:Parallel or Serial to Serial
Voltage - Supply:2V ~ 6V
Operating Temperature:-55°C ~ 125°C
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:16-SOIC
Base Product Number:74HC165
Standard Parallel-to-Serial Function: Asynchronously loads 8-bit parallel data and synchronously shifts it out as a 1-bit serial data stream, greatly conserving valuable I/O resources on the host controller.
Excellent Cascading Capability: The serial output (Q7') supports direct connection to the serial input of the next chip, enabling easy expansion to 16, 24, or more input channels for building large-scale input matrices.
Asynchronous Parallel Load Control: Features an independent active-low Parallel Load pin (/PL). When /PL is low, data from inputs (D0-D7) is directly latched into the internal register, offering simple and direct operation.
Extremely Wide Operating Temperature Range: Supports extreme temperatures from -55°C to 125°C, meeting the stringent requirements of military, aerospace, automotive, and outdoor industrial equipment applications.
High-Speed, Low-Power CMOS Technology: Based on HC technology, it provides fast signal propagation and low static power consumption, balancing performance and energy efficiency.
High Reliability: Backed by Texas Instruments' quality assurance, ensuring stable operation under long-term and harsh conditions.
Microcontroller Input Port Expansion: Used to read states of numerous pushbuttons, DIP switches, and digital sensor outputs, utilizing only a few MCU pins (clock, data, load).
Industrial Control & Automation: Acquires multiple discrete digital signals from factory control panels or distributed I/O modules, suitable for wide-temperature environments.
Automotive Electronics: Monitors multiple switch states within vehicles (e.g., door locks, windows, lights), with its wide-temperature performance meeting automotive requirements.
Data Acquisition & Monitoring Systems: Acts as a front-end signal conditioning circuit, aggregating multiple discrete statuses into serial data for the main processor.
Communication Interface Adaptation: Used in bridging circuits that require conversion from parallel bus data to serial protocol formats like SPI.
High-Reliability Equipment: Used for status acquisition and redundancy management in aerospace and military equipment, relying on its ultra-wide operating temperature range.
The CD74HC165M is a high-reliability, fully standard-compliant 8-bit parallel-to-serial shift register from Texas Instruments. It not only inherits the classic functionality of the 74HC165 family – effectively expanding input channels with minimal interface resources – but also stands out with its ultra-wide operating temperature range of -55°C to 125°C, providing designers with a key safeguard against extreme environmental challenges. Its wide supply voltage compatibility and convenient cascading capability further enhance its adaptability and expansion potential in complex digital systems. Whether for common embedded projects or critical applications in automotive, industrial, and high-reliability fields, the CD74HC165M is a stable-performing and trustworthy component of choice.
Industry Information
