STMicroelectronics 74VHC08TTR

Overview

74VHC08TTR from STMicroelectronics is a quad 2-input AND gate in TSSOP-14 package, operating from 2V to 5.5V, with 4.3 ns typical propagation delay at 5V, ±8 mA output drive, and 2 µA max quiescent current at 25°C - used for level-shifting logic interfaces between 3V and 5V systems in industrial control panels.

For engineers reviewing the 74VHC08TTR datasheet, 74VHC08TTR pinout, 74VHC08TTR application, or 74VHC08TTR equivalent, key selection criteria include input voltage tolerance (0–7V), symmetrical output impedance, power-down input protection, ESD immunity (2 kV), and compatibility with legacy 74-series logic timing and footprint.

Technical Context

The device implements four independent AND gates using sub-micron C2MOS technology with buffered outputs, enabling high noise immunity (VNIH/VNIL ≥ 28% VCC) and stable switching across wide supply and temperature ranges (–55°C to +125°C). Input structures accept 0–7V regardless of VCC, supporting hot-swap and mixed-voltage domain interfacing.

Each gate features balanced tPLH/tPHL propagation delays, low dynamic noise (VOLP ≤ 0.8 V), and latch-up immunity per JEDEC JESD78. The internal design includes diode-clamped inputs, output clamps, and on-chip ESD protection on all pins.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC08APW and 74HC08PW, the 74VHC08TTR uniquely combines 0–7 V input tolerance, 2 µA quiescent current, and 4.3 ns speed - making it the only choice for mixed-supply industrial interfaces requiring both robustness and low power.

Availability

74VHC08TTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic equipment panels requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for 74VHC08TTR 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 microcontrollers, power management ICs, sensors, and logic devices for industrial, automotive, and consumer markets.

The 74VHC series targets high-speed, low-power CMOS logic replacement for legacy 74-series functions - optimized for mixed-voltage system interfacing, ESD resilience, and extended temperature operation in harsh environments.

FAQ

Can 74VHC08TTR be used with a 3.3 V supply and 5 V inputs?

Yes. Its inputs tolerate 0–7 V regardless of V_CC, so 5 V signals may be applied directly while powering the device at 3.3 V. This enables seamless 5 V-to-3.3 V level translation without external components, verified across –40°C to +125°C per datasheet Table 5.

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

The 74VHC08TTR guarantees full performance up to 50 pF load capacitance, as validated in AC characteristics (Table 7). At 5 V supply, it delivers 8 mA output current into 50 pF with ≤7.0 ns propagation delay - sufficient for driving two standard CMOS inputs or one short PCB trace.

Does this part support partial power-down operation?

Yes. All inputs feature power-down protection: when V_CC = 0 V, inputs remain high-impedance and do not backfeed or latch. This prevents bus contention in systems where logic rails power up/down asynchronously, as confirmed in the "Power Down Protection on Inputs" specification.

How does its ESD performance compare to standard 74HC devices?

The 74VHC08TTR provides 2 kV HBM ESD immunity per IEC 61000-4-2 Level 2, exceeding typical 74HC parts (often 2 kV HBM but unqualified to IEC standards). Its input/output clamps and double-layer metal process enhance robustness in assembly and field environments.