Nexperia USA Inc. 74HCT273PW,118

Overview

74HCT273PW,118 from Nexperia is an octal positive-edge-triggered D-type flip-flop with synchronous data capture and asynchronous master reset (active LOW). It operates at 4.5 V to 5.5 V, delivers propagation delay as low as 15 ns (VCC = 4.5 V, CL = 15 pF), supports -40 °C to +125 °C industrial temperature range, and features TTL-compatible inputs for direct interfacing with legacy logic. It is used in digital control registers, bus interface latching, and clock-domain synchronization in embedded microcontroller peripherals.

For engineers reviewing the 74HCT273PW,118 datasheet, 74HCT273PW,118 pinout, 74HCT273PW,118 application, or 74HCT273PW,118 equivalent, this page provides verified functional identity, validated TSSOP20 pin mapping, confirmed timing parameters under industrial temperature and load conditions, and real-world substitution guidance - all derived from Nexperia's Rev. 8 (5 August 2024) product data sheet.

Technical Context

This device implements eight independent D-type flip-flops sharing a common clock (CP) and a single active-LOW master reset (MR). Each flip-flop captures the state of its Dn input on the LOW-to-HIGH transition of CP, provided setup (12 ns min at VCC = 4.5 V) and hold (3 ns min) timing requirements are met. MR overrides clock and data, forcing all Qn outputs LOW regardless of CP or Dn states.

Input thresholds comply with TTL logic levels (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V–5.5 V), enabling seamless integration with 5 V microcontrollers and legacy bus systems. Output drive capability is ±4.0 mA (VOH/VOL specified at IO = ±4.0 mA), with output transition times under 15 ns and maximum operating frequency up to 56 MHz at VCC = 4.5 V.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT273PWR, the 74HCT273PW,118 offers higher maximum clock frequency (56 MHz vs. 50 MHz) and broader industrial temperature validation; compared with 74HCT374PW,118, it provides guaranteed LOW output on reset - essential for fail-safe power sequencing and safety-critical latching.

Availability

74HCT273PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller bus interface latching, and digital power supply sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT273PW,118 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.

The 74HCT series targets industrial and automotive applications requiring TTL-compatible interfacing, wide temperature operation, and low-power CMOS performance - designed specifically for robust digital control and signal conditioning in harsh environments.

FAQ

Can 74HCT273PW,118 operate at 3.3 V?

No. The 74HCT273PW,118 is specified only for 4.5 V to 5.5 V supply. Its TTL-compatible inputs require VIH ≥ 2.0 V, but output VOH drops below 3.3 V logic-high threshold at VCC < 4.5 V, and static characteristics (e.g., VIH/VIL margins, ICC) are not characterized below 4.5 V. Use 74HC273 for 3.3 V operation.

Is the exposed thermal pad on the TSSOP20 package electrically connected?

No. Per Nexperia SOT360-1 mechanical drawing, the exposed pad is not electrically connected to any internal node. It may remain floating or be soldered to GND for thermal improvement, but no electrical connection is required or implied - no internal bond wires attach to it.

What is the minimum pulse width required on the MR pin to ensure reliable reset?

The minimum MR pulse width is 10 ns (low) at VCC = 4.5 V, per Table 7 "tW pulse width" for MR input. This ensures full propagation through internal reset circuitry and guarantees all eight flip-flops reach LOW state synchronously, even under worst-case process/voltage/temperature conditions.

Does 74HCT273PW,118 support hot insertion?

No. The device lacks hot-swap protection circuitry such as power-on reset, Ioff partial power-down, or back-drive immunity. Applying VCC while signals are present may cause latch-up or excessive current due to input clamp diode conduction. Power sequencing (VCC before signals) is mandatory per Absolute Maximum Ratings.