STMicroelectronics 74ACT00TTR

Overview

74ACT00TTR from STMicroelectronics is a quad 2-input NAND gate in TSSOP-14 package, designed for high-speed digital logic interfacing between TTL, CMOS, and NMOS systems. It delivers 4.5 ns typical propagation delay at 5 V, ±24 mA symmetrical output drive, and operates across 4.5–5.5 V with 2 µA max quiescent current - used in bus buffering, address decoding, and control signal conditioning in industrial PLCs and instrumentation.

For engineers reviewing the 74ACT00TTR datasheet, 74ACT00TTR pinout, 74ACT00TTR application, or 74ACT00TTR equivalent, key selection criteria include transmission-line driving capability (50 Ω), latch-up immunity, ESD tolerance (2 kV), and strict VIH/VIL compatibility with legacy TTL logic families.

Technical Context

The 74ACT00TTR implements four independent NAND gates using sub-micron C2MOS technology with three-stage buffered outputs, enabling high noise immunity and stable switching. Its symmetrical output impedance ensures matched tPLH and tPHL delays (≤9.5 ns over temperature), critical for timing-critical combinational logic paths.

Input thresholds are fixed at VIH ≥ 2.0 V and VIL ≤ 0.8 V under 4.5–5.5 V supply, guaranteeing interoperability with standard TTL outputs. All I/O pins feature integrated protection diodes and 2 kV HBM ESD rating, supporting robust operation in noisy industrial environments without external clamping.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 1.1 mm height, lead-free, moisture sensitivity level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ACT00DR and MC74ACT00DT, the 74ACT00TTR offers the lowest profile and best high-temperature propagation delay consistency, making it optimal for compact, thermally demanding industrial control modules.

Availability

74ACT00TTR is available at Aetrix Electronics and suitable for industrial bus buffering, legacy system interface, digital panel controller logic, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ACT00TTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer applications.

The 74ACT series targets high-speed, low-power TTL-compatible logic interfacing - specifically engineered to bridge performance gaps between legacy bipolar logic and modern CMOS systems without compromising robustness.

FAQ

Is 74ACT00TTR pin-compatible with standard 7400-series TTL devices?

Yes - it uses identical pinout and logic function mapping to the original 7400, with direct replacement capability in DIP-14, SO-14, and TSSOP-14 footprints. Input voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive strength (±24 mA) meet or exceed TTL requirements, ensuring drop-in functionality without circuit modification.

What is the maximum operating temperature range for 74ACT00TTR?

The 74ACT00TTR is rated for continuous operation from –55°C to +125°C, validated per STMicroelectronics' industrial-grade qualification standards. This range covers extended-temperature applications such as motor drives, outdoor instrumentation, and aerospace ground support equipment where ambient extremes exceed commercial-grade limits.

Does 74ACT00TTR require external pull-up or pull-down resistors on unused inputs?

No - all inputs are internally terminated via CMOS structure and tolerate floating states without undefined logic behavior. However, STMicroelectronics recommends tying unused inputs to VCC or GND to minimize dynamic current consumption and reduce susceptibility to noise coupling in high-density layouts.

Can 74ACT00TTR drive 50 Ω coaxial cables directly?

Yes - its ±24 mA output drive and symmetrical impedance allow direct connection to 50 Ω transmission lines up to 15 cm in length without external series termination. Measured waveforms confirm <5% overshoot and <10% undershoot under CL = 50 pF and RL = 500 Ω load conditions per AC characterization.