Nexperia USA Inc. 74HC21D-Q100J

Overview

74HC21D-Q100 from Nexperia is a dual 4-input AND gate IC qualified to AEC-Q100 Grade 1 for automotive use, operating from -40 °C to +125 °C with supply voltage range 2.0–6.0 V, propagation delay as low as 10 ns at VCC = 5.0 V/CL = 15 pF, and CMOS-level input compatibility. It performs logic gating in body control modules, powertrain sensor interfaces, and infotainment system signal conditioning.

For engineers reviewing the 74HC21D-Q100 datasheet, 74HC21D-Q100 pinout, 74HC21D-Q100 application, or 74HC21D-Q100 equivalent, key selection criteria include automotive temperature compliance, SO14 package mechanical fit, dual independent 4-input logic function, and input clamping diode support for overvoltage-tolerant interfacing.

Technical Context

This device implements two independent 4-input AND functions using standard CMOS silicon technology, with inputs featuring integrated clamp diodes enabling safe interface to signals exceeding VCC when used with current-limiting resistors. Each gate output drives TTL- and CMOS-compatible loads with guaranteed VOH ≥ 3.98 V and VOL ≤ 0.26 V at VCC = 4.5 V and IO = ±4.0 mA.

It operates across a wide voltage range (2.0–6.0 V), supports high noise immunity (>50% of VCC), and meets JEDEC JESD7A and JESD8C standards. Latch-up immunity exceeds 100 mA per JESD78 Class II Level B, and ESD robustness includes HBM >2000 V and CDM >1000 V.

Key Specifications

Pinout & Package

74HC21D-Q100 is housed in a plastic small outline package (SO14) per SOT108-1, with 14 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; pin 1 index aligns with corner near lead 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-input AND gate applications.

Compared with 74HC21D-Q100, the PW variant trades SO14 mechanical robustness for higher density, while the TI alternative maintains functional equivalence but introduces layout incompatibility and divergent thermal derating behavior - making the Nexperia SO14 version optimal for cost-sensitive, thermally stable under-dash modules.

Availability

74HC21D-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, powertrain control units, and ADAS domain controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC21D-Q100 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 discrete, logic, and MOSFET devices with focus on efficiency, reliability, and sustainability in automotive and industrial markets.

The 74HC21-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust, low-power combinational logic in harsh-temperature vehicle subsystems where pin-level predictability and AEC compliance are mandatory.

FAQ

Is 74HC21D-Q100 compatible with 3.3 V microcontroller I/O?

Yes. Its CMOS input thresholds (VIH ≥ 2.1 V, VIL ≤ 1.35 V at VCC = 4.5 V) and 2.0–6.0 V supply range allow direct interfacing with 3.3 V logic. When powered at 3.3 V, VIH is guaranteed ≥ 2.31 V and VIL ≤ 0.99 V, safely accepting standard 3.3 V output levels without level shifters.

Can unused inputs be left floating?

No. All inputs - including those not used in a given design - must be tied to VCC or GND. Floating CMOS inputs cause increased supply current, erratic switching, and potential latch-up due to undefined threshold biasing; unused pins 3 and 11 are n.c. and must remain unconnected.

What is the maximum capacitive load this device can drive reliably?

The device is characterized up to 50 pF load capacitance (per Table 9 test data). At CL = 50 pF and VCC = 6.0 V, propagation delay increases to ~28 ns (max), and transition time extends to ~19 ns. For stable operation beyond 50 pF, add a buffer stage or reduce slew rate via series resistance.

Does the SO14 package support reflow soldering per J-STD-020?

Yes. The SOT108-1 package is rated for standard lead-free reflow profiles (peak 260 °C, 20–40 sec), with moisture sensitivity level (MSL) 1 - unlimited floor life at ≤30 °C/85% RH. No pre-bake is required unless exposed to humid environments for >168 hours.