Texas Instruments CD74HCT00ME4

Overview

CD74HCT00ME4 from Texas Instruments is a quadruple 2-input NAND gate IC in SOIC-14 package, operating from 4.5 V to 5.5 V with ±4 mA output drive, 19 ns typical propagation delay at 5 V, and –55°C to +125°C temperature range - used for logic-level signal inversion and S-R latch construction in industrial control and tamper-detection circuits.

For engineers reviewing the CD74HCT00ME4 datasheet, CD74HCT00ME4 pinout, CD74HCT00ME4 application, or CD74HCT00ME4 equivalent, this page delivers verified functional identity, confirmed pin mapping, real-world timing and drive specs, and two validated alternative parts for design continuity and sourcing flexibility.

Technical Context

This device implements four independent CMOS NAND gates with buffered inputs and balanced push-pull outputs, supporting TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) while maintaining CMOS power efficiency. Each gate performs Y = A ● B in positive logic.

It features standard CMOS input structure with 10 pF input capacitance and clamp diodes on all I/O pins, requiring unused inputs to be tied to VCC or GND to prevent floating-induced oscillation or excess current draw.

Key Specifications

Pinout & Package

CD74HCT00ME4 is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 3.90 mm, with gull-wing leads, RoHS-compliant NiPdAu finish, and moisture sensitivity level (MSL) 1 - suitable for standard reflow without baking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Compared with CD74HCT00ME4, SN74HCT00DR offers identical electrical performance with optimized packaging for volume manufacturing, while CD74HC00M96G4 trades TTL compatibility for broader supply flexibility and slightly slower timing - making the former ideal for drop-in replacement in 5 V TTL systems, and the latter appropriate only in non-TTL contexts.

Availability

CD74HCT00ME4 is available at Aetrix Electronics and suitable for industrial control logic, tamper-detection circuits, power sequencing enable functions, and S-R latch implementations requiring stable component supply across extended temperature ranges.

Supply support for CD74HCT00ME4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability logic families.

CD74HCT00ME4 belongs to TI's CD74HCT logic series - engineered for seamless integration into 5 V TTL-based systems requiring industrial-grade temperature resilience and low-power CMOS efficiency.

FAQ

What is the supply voltage range for CD74HCT00ME4?

The CD74HCT00ME4 operates from 4.5 V to 5.5 V. This narrow range ensures TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while maintaining CMOS output drive strength and low static current. Operation outside this window risks incorrect logic interpretation or excessive ICC - the CD74HCT00ME4 is not rated for 3.3 V or 2 V operation.

Does CD74HCT00ME4 support direct connection to LSTTL loads?

Yes, CD74HCT00ME4 supports fanout of up to 10 LSTTL loads due to its ±4 mA output drive capability and TTL-compatible input thresholds. Its VOH and VOL specifications meet LSTTL requirements across the full temperature range, allowing direct interface without buffer stages - a key advantage over standard HC variants.

What is the maximum propagation delay of CD74HCT00ME4 at 5 V?

The maximum propagation delay (tpd) for CD74HCT00ME4 is 27 ns at VCC = 5 V, TA = –55°C to +125°C, and CL = 50 pF. The typical value is 19 ns under the same conditions. This delay is measured between input transition (50% point) and output transition (50% point), and applies uniformly across all four gates in the CD74HCT00ME4.

How should unused inputs on CD74HCT00ME4 be handled?

Unused inputs on CD74HCT00ME4 must be terminated to either VCC or GND - never left floating. Floating CMOS inputs cause increased ICC, potential oscillation, and undefined output states. For active-high default logic, tie to VCC via 10 kΩ; for active-low, tie to GND. All eight inputs (1A–4B) require explicit biasing per TI's layout guidelines.

Is CD74HCT00ME4 RoHS compliant and what is its MSL rating?

Yes, CD74HCT00ME4 is RoHS compliant with NiPdAu lead finish and carries MSL Level-1 (unlimited floor life at ≤30°C/60% RH). It is qualified for standard Pb-free reflow profiles up to 260°C peak, with no pre-bake required - consistent with TI's SOIC-14 packaging standards for industrial-grade logic devices.