Nexperia USA Inc. 74HC273D,652

Overview

74HC273D,652 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), operating across 2.0 V–6.0 V supply, delivering 8-bit synchronous data latching in digital control and timing circuits. It features CMOS-level inputs, 15 ns typical propagation delay at 4.5 V, −40 °C to +125 °C temperature range, and SO20 (SOT163-1) package for industrial logic interfacing.

For engineers reviewing the 74HC273D,652 datasheet, 74HC273D,652 pinout, 74HC273D,652 application, or 74HC273D,652 equivalent, this device serves as a robust, non-latched edge-triggered register for bus buffering, state storage, and clock-synchronized I/O expansion where deterministic setup/hold timing and low-power CMOS operation are required.

Technical Context

The 74HC273D,652 implements eight independent D-type flip-flops sharing a common clock (CP) and active-low master reset (MR). Each flip-flop captures Dn input on the LOW-to-HIGH CP transition, provided setup (12 ns min at 4.5 V) and hold (3 ns min) times are met. MR overrides clock and data, forcing all Qn outputs LOW regardless of CP or Dn state.

Input clamping diodes enable safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports 20 μA input leakage max, and exhibits 20 pF power dissipation capacitance (CPD) for dynamic power estimation.

Key Specifications

Pinout & Package

74HC273D,652 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads, 7.5 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or index area; the package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC273D,652, the 74HCT273D,652 offers superior TTL input compatibility at no cost to timing or drive strength, while the SN74HC273PWR delivers identical logic performance in a smaller footprint-enabling trade-offs between legacy interface assurance and PCB area optimization.

Availability

74HC273D,652 is available at Aetrix Electronics and suitable for industrial automation, embedded control, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC273D,652 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 specializing in high-performance, energy-efficient logic, discrete, and MOSFET components, with manufacturing rooted in process innovation and automotive-grade reliability standards.

The 74HC273D,652 belongs to Nexperia's 74HC logic family - engineered for industrial and consumer applications demanding low power, wide voltage operation, and robust noise immunity in synchronous digital systems.

FAQ

What is the maximum clock frequency supported by the 74HC273D,652?

The 74HC273D,652 supports a maximum clock frequency of 30 MHz at VCC = 4.5 V and CL = 50 pF, based on its 15 ns typical propagation delay and 16 ns minimum pulse width requirement. At VCC = 6.0 V, fmax increases to 35 MHz, but system-level timing margins must account for PCB trace delays and load capacitance beyond 50 pF.

Can the 74HC273D,652 be used with a 3.3 V supply?

Yes - the 74HC273D,652 is fully specified down to 2.0 V and operates reliably at 3.3 V, delivering VIH = 2.31 V (min), VOL = 0.26 V (max), and tpd = 18 ns (typ) under those conditions. Its CMOS inputs are compatible with 3.3 V logic families without level shifting.

Is the master reset (MR) input synchronous or asynchronous?

The MR input is asynchronous and active LOW: asserting MR immediately forces all Qn outputs LOW within tPHL (16 ns typ at 4.5 V), independent of the CP signal state or timing. Release of MR does not trigger a new sample - the next CP edge resumes normal D-to-Q transfer.

Does the 74HC273D,652 require external pull-up or pull-down resistors on unused inputs?

No - unused Dn or CP inputs must be tied to VCC or GND to prevent floating states that cause increased ICC and potential oscillation. The device does not include internal pull resistors; Nexperia recommends hard-wiring all unused inputs to defined logic levels per application requirements.