Nexperia USA Inc. 74AHC273D,112

Overview

74AHC273D,112 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), operating from 2.0 V to 5.5 V supply, featuring 8-bit data latching, overvoltage-tolerant inputs up to 5.5 V, and guaranteed operation from –40 °C to +125 °C in SO20 package. It serves as a synchronous data register in digital control logic, bus interface buffering, and microcontroller peripheral expansion.

For engineers reviewing the 74AHC273D,112 datasheet, 74AHC273D,112 pinout, 74AHC273D,112 application, or 74AHC273D,112 equivalent, this device is selected for high-noise-immunity edge-triggered storage in mixed-voltage 3.3 V/5 V systems, requiring precise setup/hold timing (tsu = 3.0 ns, th = 1.0 ns at VCC = 5 V) and low dynamic power (CPD = 14 pF).

Technical Context

The 74AHC273D,112 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 and hold times are met; MR overrides clock and data to force all Qn outputs LOW immediately.

Its CMOS architecture delivers balanced propagation delays (tpd = 4.2 ns typ. at VCC = 5 V, CL = 15 pF), Schmitt-trigger inputs for noise immunity, and overvoltage-tolerant inputs enabling level translation between 3.3 V logic driving 5 V domains without external circuitry.

Key Specifications

Pinout & Package

74AHC273D,112 is supplied in SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, standard JEDEC MS-013 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT273D,112 and SN74LVC273APWR, the 74AHC273D,112 uniquely balances wide supply range, overvoltage-safe inputs, and industrial temperature rating - making it the sole choice for robust 3.3 V/5 V bridging in harsh environments.

Availability

74AHC273D,112 is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and embedded computing applications requiring stable component supply across extended temperature ranges and mixed-voltage interfaces.

Supply support for 74AHC273D,112 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in energy-efficient, reliable solutions for automotive, industrial, and consumer markets.

The 74AHC273D,112 belongs to Nexperia's AHC logic family - engineered for high-speed, low-power, mixed-voltage interoperability in real-world embedded control and interface applications.

FAQ

Can 74AHC273D,112 operate reliably at 3.3 V while interfacing with 5 V signals?

Yes. Its inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. When powered at 3.3 V, it safely accepts 5 V logic-high signals without damage or level-shifting circuitry - a key design advantage for bridging 3.3 V microcontrollers to 5 V peripherals.

What is the minimum pulse width required on the MR pin for reliable reset assertion?

The minimum MR LOW pulse width is 5.0 ns at VCC = 5 V and 6.0 ns at VCC = 3.3 V, per datasheet Table 7. This ensures full propagation through internal reset logic and guarantees all eight outputs reach LOW state before the next clock edge.

Does 74AHC273D,112 require external pull-up or pull-down resistors on unused inputs?

No. All inputs feature Schmitt-trigger action and defined logic thresholds. Unused inputs should be tied HIGH or LOW directly to VCC or GND - floating inputs are not permitted due to potential oscillation and increased ICC, but no pull-up/pull-down resistors are needed for termination.

How does the 74AHC273D,112 handle simultaneous clock and reset assertion?

MR is asynchronous and dominant: when MR is LOW, all Qn outputs force LOW immediately, overriding any CP edge or Dn state. The flip-flop resumes normal operation only after MR returns HIGH and a subsequent valid CP rising edge occurs with proper setup/hold timing.