Texas Instruments CD74HC273MG4

Overview

CD74HC273MG4 from Texas Instruments is a high-speed CMOS octal D-type flip-flop with asynchronous active-low reset, positive-edge clock triggering, and 2V–6V operation. It provides synchronized 8-bit data latching for bus interfaces, operates across –55°C to +125°C, and delivers 26 ns max propagation delay (VCC = 6 V, CL = 50 pF). It serves as an 8-bit register in industrial control and digital instrumentation systems.

For engineers reviewing the CD74HC273MG4 datasheet, CD74HC273MG4 pinout, CD74HC273MG4 application, or CD74HC273MG4 equivalent, this page delivers verified electrical specs, SOIC-20 package details, functional timing behavior, and real-world implementation guidance - all grounded in TI's SCHS174D production data sheet.

Technical Context

The CD74HC273MG4 implements eight identical edge-triggered D flip-flops sharing one common clock (CLK) and one asynchronous clear (CLR) input. Each stage transfers D-input data to its Q-output on the rising edge of CLK, while CLR forces all Q outputs low independently of CLK state.

It uses silicon-gate CMOS technology with buffered inputs, balanced push-pull outputs capable of ±25 mA per pin, and supports fanout of 10 LSTTL loads. Its design targets synchronous data capture in noise-immune, wide-temperature embedded systems without requiring external pull-ups or level shifters.

Key Specifications

Pinout & Package

DW package: 20-pin SOIC, 12.80 mm × 7.50 mm body, surface-mount, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SN74HC273N, CD74HC273MG4 offers superior thermal dissipation and smaller PCB area; compared with CD74HCT273M, it provides wider supply flexibility and higher speed - making CD74HC273MG4 optimal for compact, multi-voltage, high-reliability designs.

Availability

CD74HC273MG4 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and motor control applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC273MG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with over 50 years of high-reliability component development.

The CD74HC273MG4 belongs to TI's CDx4HC(T)273 family - engineered for robust, low-power, wide-temperature data synchronization in mission-critical industrial and aerospace systems.

FAQ

What is the maximum clock frequency supported by CD74HC273MG4?

The CD74HC273MG4 supports up to 35 MHz maximum clock frequency at VCC = 6 V and CL = 50 pF, per TI's SCHS174D datasheet. At 4.5 V, the limit drops to 30 MHz, and at 2 V it is 6 MHz. These values reflect guaranteed timing margins across the full –55°C to +125°C operating range, not typical-only conditions.

Does CD74HC273MG4 require external pull-up resistors on the CLR pin?

Yes - the CLR pin is active-low and internally un-biased, so CD74HC273MG4 requires an external pull-up resistor (typically 10 kΩ to VCC) to ensure a defined HIGH state during normal operation. Leaving CLR floating risks unintended resets due to noise coupling or leakage currents.

Can CD74HC273MG4 operate reliably at 3.3 V supply voltage?

Yes - CD74HC273MG4 is fully specified for 2V–6V operation, including 3.3 V. At VCC = 3.3 V, VIH = 2.31 V (min), VIL = 0.99 V (max), and tPLH/tPHL ≤ 38 ns (max), enabling seamless integration with 3.3 V microcontrollers and FPGAs without level translation.

How many output loads can CD74HC273MG4 drive simultaneously?

CD74HC273MG4 drives up to 10 LSTTL loads per output, based on its output current capability (±25 mA) and voltage thresholds. This assumes standard 5 V LSTTL inputs; for 3.3 V systems, fanout is limited by VOL/VOH compliance rather than current, typically supporting ≥ 20 CMOS loads.

Is CD74HC273MG4 pin-compatible with CD74HCT273M?

Yes - CD74HC273MG4 and CD74HCT273M share identical SOIC-20 (DW) pinout, pin functions, and mechanical dimensions. However, they differ electrically: CD74HC273MG4 operates from 2V–6V with CMOS input thresholds, while CD74HCT273M is restricted to 4.5V–5.5V with TTL-compatible inputs.