STMicroelectronics 74LVQ08TTR

Overview

74LVQ08TTR from STMicroelectronics is a low-voltage CMOS quad 2-input AND gate optimized for 3.3 V digital logic systems, featuring 5.6 ns typical propagation delay at V_CC = 3.3 V, ±12 mA symmetrical output drive, and 2 V to 3.6 V operating voltage range. It delivers low-noise operation (V_OLP = 0.3 V typ.), 75 Ω transmission line driving capability, and is pin- and function-compatible with standard 74-series 08 logic.

For engineers reviewing the 74LVQ08TTR datasheet, 74LVQ08TTR pinout, 74LVQ08TTR application, or 74LVQ08TTR equivalent, key selection criteria include propagation delay matching, 3.3 V bus-level compatibility, ESD immunity (2 kV), transmission-line drive strength, and quiescent current (2 µA max) in battery-sensitive or noise-critical digital interface designs.

Technical Context

The 74LVQ08TTR implements four independent AND gates using sub-micron C2MOS technology with buffered outputs, enabling high noise immunity and stable switching across industrial temperature ranges (–55 °C to +125 °C). Its internal two-stage architecture includes input protection diodes and output buffers designed for controlled edge rates and minimized ground bounce.

It supports PCI bus levels at 24 mA drive, guarantees truth table operation from 1.2 V to 3.6 V, and features matched t_PLH/t_PHL delays (≤0.5 ns skew) under 50 pF load - critical for synchronous logic interfacing and clock distribution in mixed-voltage systems.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, thin-profile surface-mount design compatible with automated reflow assembly and space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC08APWR and 74AHC08PW,118, the 74LVQ08TTR uniquely balances ultra-low ICC (2 µA), 75 Ω line drive, and PCI-compliant 24 mA output - making it optimal for noise-sensitive, battery-backed, or transmission-line-coupled 3.3 V logic where deterministic timing and ESD resilience are mandatory.

Availability

74LVQ08TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical infusion pump controllers, and 5G small cell baseband boards requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74LVQ08TTR 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LVQ series targets low-voltage, low-noise 3.3 V logic applications - emphasizing ESD robustness, transmission-line compatibility, and ultra-low static power for embedded control and interface functions.

FAQ

Is the 74LVQ08TTR compatible with 5 V TTL inputs?

Yes - its inputs are TTL-compatible, accepting VIH ≥ 2.0 V and VIL ≤ 0.8 V over the full 2–3.6 V supply range. However, outputs swing only to V_CC (max 3.6 V), so direct connection to 5 V TTL inputs requires a pull-up or level translator for reliable VOH recognition.

What is the maximum recommended capacitive load for stable 74LVQ08TTR operation?

The device is characterized up to 50 pF (per AC specs), and output skew remains ≤1.0 ns up to this load. For loads exceeding 50 pF, propagation delay increases linearly; stability is maintained, but timing margins must be recalculated using the CL-dependent t_PD curve in Figure 4 of the datasheet.

Does the 74LVQ08TTR support hot insertion or live board swapping?

No - it lacks powered-off protection (I_OFF) or bus-hold circuitry. Applying input signals while V_CC is unpowered may forward-bias internal protection diodes, risking latch-up or excessive current. Always power V_CC before asserting inputs in hot-swap scenarios.

How does the 74LVQ08TTR achieve 75 Ω transmission line driving capability?

Its output stage is designed with matched source/sink impedance near 75 Ω at V_CC = 3.0 V, verified by dynamic output current tests (I_OLD/I_OHD) and waveform analysis in Figure 4. This allows clean signal launch onto 75 Ω traces without external termination resistors in point-to-point configurations.