Nexperia USA Inc. 74HC21PW,112

Overview

74HC21PW,112 from NXP Semiconductors is a dual 2-input AND gate IC in TSSOP-14 package, operating from 2V to 6V supply, with typical propagation delay of 7 ns at 4.5V, fan-out of 10 LSTTL loads, and CMOS-level input thresholds. It performs basic combinational logic in digital control subsystems such as power sequencing and interface enable gating.

For engineers reviewing the 74HC21PW,112 datasheet, 74HC21PW,112 pinout, 74HC21PW,112 application, or 74HC21PW,112 equivalent, key selection criteria include supply voltage range compatibility, propagation delay budget for synchronous logic timing, fan-out capability in mixed-logic interfacing, and TSSOP-14 footprint constraints in space-constrained PCB layouts.

Technical Context

This device implements two independent 2-input AND functions using high-speed silicon-gate CMOS technology. Each gate features symmetrical output drive (±5.2 mA at V_CC = 4.5V), rail-to-rail output swing, and input hysteresis of 0.5 V for noise immunity.

It operates within an industrial temperature range (−40°C to +125°C) and meets JEDEC JESD78 Class II latch-up immunity. The logic family is fully compatible with 74HCT and 74LS inputs when used with appropriate pull-ups.

Key Specifications

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package), 0.65 mm pitch, body width 4.4 mm, thermal pad not present. Pin count and physical layout conform to JEDEC MO-153AC standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-input AND gate applications.

Compared with 74HC21PW,112, the 74HCT21PW,118 offers improved interoperability with older TTL families, while the SN74LVC21APWR delivers higher drive strength and lower voltage operation at the cost of reduced supply flexibility and package compatibility.

Availability

74HC21PW,112 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and consumer appliance mainboards requiring stable component supply over extended production lifecycles.

Supply support for 74HC21PW,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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74HC logic family was designed for high-speed, low-power general-purpose digital logic in mixed-signal embedded systems where robustness, wide supply tolerance, and predictable timing are critical.

FAQ

Is 74HC21PW,112 compatible with 5 V TTL logic inputs?

Yes - its input thresholds (V_IL ≤ 1.35 V, V_IH ≥ 3.15 V at V_CC = 4.5 V) meet TTL voltage requirements. However, direct connection to 5 V TTL outputs requires series resistors or level-shifting if V_CC < 4.5 V to avoid exceeding absolute maximum input ratings.

What is the maximum recommended capacitive load for 74HC21PW,112 outputs?

The datasheet specifies guaranteed AC performance up to 50 pF. For loads exceeding 50 pF, propagation delay increases linearly (~0.1 ns/pF), and rise/fall times degrade. Layout best practice limits trace capacitance to ≤30 pF for timing-critical paths.

Can unused inputs be left floating?

No - floating CMOS inputs cause increased supply current and potential oscillation. Unused inputs must be tied to V_CC or GND via ≤1 kΩ resistor. For 74HC21PW,112, pins 4, 9, 10, 11, 12, and 13 are NC and must remain unconnected; only inputs 1, 2, 5, and 6 require termination.

Does 74HC21PW,112 support hot insertion?

No - it lacks hot-swap protection circuitry. Applying V_CC while inputs are driven can cause latch-up or excessive current flow. Power sequencing must ensure V_CC is stable before applying valid logic signals to any input pin.