Nexperia USA Inc. 74HCT273D,653

Overview

74HCT273D,653 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 ambient range, and features TTL-compatible input thresholds. It is used in digital control logic, bus interface latching, and clock-synchronized data staging in industrial microcontroller peripherals.

For engineers reviewing the 74HCT273D,653 datasheet, 74HCT273D,653 pinout, 74HCT273D,653 application, or 74HCT273D,653 equivalent, key selection criteria include its TTL-level input compatibility, guaranteed 15 ns max propagation delay at 4.5 V, SO20 package thermal performance up to +125 °C, and master reset behavior independent of clock edge timing.

Technical Context

This device implements eight identical 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) and hold (3 ns min) times are met. MR overrides all clock and data activity, forcing Qn outputs LOW regardless of CP or Dn states.

Input clamping diodes enable safe interfacing to voltages exceeding VCC when current-limiting resistors are used. The device complies with JEDEC JESD7A (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V), and meets HBM ESD >2000 V and CDM >1000 V per JS-001/JS-002.

Key Specifications

Pinout & Package

74HCT273D,653 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Thermal derating begins at 109 °C (12.3 mW/K).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT273D,653, the 74HCT374D,653 trades master reset for output enable and bus contention control, while SN74HCT273PWR offers identical functionality in a smaller, thermally optimized package - choice depends on board area, thermal constraints, and system-level reset architecture.

Availability

74HCT273D,653 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and embedded microcontroller peripheral interfaces requiring stable component supply across extended temperature ranges.

Supply support for 74HCT273D,653 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, reliable logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

The 74HCT273 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically for robust 5 V TTL-compatible digital interfacing in harsh industrial and automotive environments.

FAQ

What is the absolute maximum supply voltage for 74HCT273D,653?

The absolute maximum VCC is +7.0 V, per IEC 60134 limiting values. However, operation above 5.5 V violates recommended conditions and risks parametric degradation or accelerated wear-out. Continuous operation must remain within 4.5 V to 5.5 V to ensure specified timing, drive strength, and lifetime reliability.

Can 74HCT273D,653 be used with a 3.3 V microcontroller?

No - 74HCT273D,653 requires VCC = 4.5–5.5 V and has TTL-level inputs (VIH ≥ 2.0 V), but its outputs swing to ~4.0 V (VOH @ −4 mA), which may not meet 3.3 V logic high thresholds reliably. A level-shifting buffer or 74LVC273 variant is required for direct 3.3 V system integration.

Is the master reset (MR) pin debounced internally?

No - MR is a purely combinational asynchronous input with no internal filtering or hysteresis. External RC debounce or Schmitt-trigger conditioning is required if driven by mechanical switches or noisy control signals to prevent spurious resets during voltage transitions.

Does 74HCT273D,653 support hot insertion?

No - the device lacks hot-swap protection circuitry. Applying VCC while signals (CP, Dn, MR) are active may cause latch-up or excessive current due to back-powering through input clamping diodes. Power sequencing (VCC first, then signals) is mandatory per JEDEC JESD78 Class II Level B compliance.