Nexperia USA Inc. 74AHC273D,118

Overview

74AHC273D,118 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), designed for synchronous data latching in digital logic systems. It operates across 2.0–5.5 V supply, features overvoltage-tolerant inputs up to 5.5 V, and delivers propagation delays as low as 4.2 ns (VCC = 5 V, CL = 15 pF). Used in microcontroller I/O expansion, bus interface buffering, and clock-synchronized state storage.

For engineers reviewing the 74AHC273D,118 datasheet, 74AHC273D,118 pinout, 74AHC273D,118 application, or 74AHC273D,118 equivalent, this device serves as a robust, temperature-rated (−40 °C to +125 °C) edge-triggered register for mixed-voltage logic translation, high-noise immunity control paths, and deterministic timing-critical latch functions in industrial and embedded systems.

Technical Context

The 74AHC273D,118 implements eight independent D-type flip-flops sharing a common clock (CP) and active-low master reset (MR). Each stage captures Dn input on the LOW-to-HIGH transition of CP, provided setup (tsu = 3.0 ns) and hold (th = 1.0 ns) times are met. MR overrides clock and data, forcing all Qn outputs LOW regardless of CP or Dn state.

Its CMOS architecture ensures balanced tPLH/tPHL propagation delays, Schmitt-trigger inputs for noise immunity, and rail-to-rail output swing (VOH ≥ 3.94 V, VOL ≤ 0.36 V at VCC = 4.5 V, IO = ±8 mA). Input levels conform to CMOS thresholds (VIH ≥ 3.85 V at VCC = 5.5 V), enabling direct interfacing with 3.3 V and 5 V logic families.

Key Specifications

Pinout & Package

74AHC273D,118 is supplied in SO20 (SOT163-1) package: plastic small outline, 20 leads, 7.5 mm body width, gull-wing leads, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT273D,118, the AHC variant offers superior noise immunity and wider VCC range but requires higher VIH; compared with SN74AHC273PWR, the SO20 package provides easier hand-soldering and higher mechanical robustness in vibration-prone environments.

Availability

74AHC273D,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC273D,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AHC273D,118 belongs to Nexperia's AHC logic family - engineered for high-speed, low-power, mixed-voltage interoperability in demanding embedded control and interface applications.

FAQ

What is the maximum clock frequency supported by the 74AHC273D,118?

The 74AHC273D,118 supports up to 120 MHz maximum frequency at VCC = 5 V and CL = 15 pF, and 80 MHz at CL = 50 pF. These values are guaranteed across the full −40 °C to +125 °C operating range per Nexperia's Rev. 5 datasheet. Frequency derating occurs linearly with increasing load capacitance and decreasing supply voltage.

Can the 74AHC273D,118 safely interface a 3.3 V microcontroller with a 5 V peripheral?

Yes - its inputs are overvoltage tolerant to 5.5 V regardless of VCC level, allowing direct connection of 5 V peripheral outputs to Dn or CP pins while VCC = 3.3 V. Outputs swing rail-to-rail (VOH ≈ VCC), so external level-shifting is required only if the 5 V peripheral needs true 5 V logic-high recognition.

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

The MR pin is asynchronous and active LOW: asserting MR immediately forces all Qn outputs LOW within tpd (max 17 ns at VCC = 3.3 V, CL = 50 pF), independent of CP state or timing. Release of MR returns the device to normal clocked operation on the next valid CP rising edge.

Does the 74AHC273D,118 require external pull-up or pull-down resistors on unused inputs?

No - all inputs feature Schmitt-trigger action and defined CMOS thresholds; floating inputs are not permitted. Unused Dn or CP inputs must be tied to VCC or GND. MR should be pulled HIGH via ≥10 kΩ resistor unless actively driven, to prevent unintended reset activation from noise or leakage.