STMicroelectronics 74LVQ32TTR

Overview

74LVQ32TTR from STMicroelectronics is a low-voltage CMOS quad 2-input OR gate optimized for 3.3 V logic systems, featuring 5.2 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 PCI bus-level driving (24 mA) with 75 Ω transmission line compatibility and 2 kV ESD immunity-used in industrial control backplanes and low-noise embedded I/O expansion.

For engineers reviewing the 74LVQ32TTR datasheet, 74LVQ32TTR pinout, 74LVQ32TTR application, or 74LVQ32TTR equivalent, key selection criteria include symmetrical output impedance (|I_OH| = I_OL = 12 mA min), low dynamic noise (V_OLP = 0.3 V typ), and guaranteed truth table operation from 1.2 V to 3.6 V.

Technical Context

The device implements four independent OR logic functions using sub-micron C2MOS technology with two-stage buffered outputs, enabling high noise immunity and stable switching across temperature (–55 °C to +125 °C). Input thresholds are specified at V_IL = 0.8 V and V_IH = 2.0 V under 3.0–3.6 V supply conditions.

Dynamic performance is characterized with CL = 50 pF and RL = 500 Ω, where t_PLH ≅ t_PHL ensures balanced rise/fall timing critical for synchronous bus interfacing. Output skew is limited to 0.5 ns (typ) between any two gates under identical switching conditions.

Key Specifications

Pinout & Package

TSSOP-14 package (JEDEC MO-153, 4.4 mm × 5.0 mm body, 0.65 mm pitch) with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32APWR and 74AUP1G32GW,125, the 74LVQ32TTR uniquely balances 2 µA quiescent current, 12 mA drive, and TSSOP-14 pinout - making it optimal for legacy-compatible, low-noise 3.3 V industrial backplanes requiring zero layout change.

Availability

74LVQ32TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and 3.3 V backplane interfacing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVQ32TTR 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 microcontrollers, analog ICs, power management, and discrete components for industrial, automotive, and consumer markets.

The 74LVQ series targets low-voltage, low-noise 3.3 V logic applications where ESD robustness, transmission-line driving, and extended temperature operation are mandatory - particularly in industrial automation and automotive subsystems.

FAQ

Is the 74LVQ32TTR compatible with 5 V TTL inputs?

Yes - its input thresholds (V_IL = 0.8 V, V_IH = 2.0 V) and 2 kV HBM ESD protection allow direct interface with standard 5 V TTL outputs without level shifters, provided V_CC remains within 2.0–3.6 V. Input voltage must not exceed V_CC + 0.5 V per absolute maximum ratings.

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

The 74LVQ32TTR is characterized up to 50 pF (AC specs) and supports 75 Ω transmission lines, implying reliable operation with ≤75 pF total load including trace capacitance. For loads >50 pF, propagation delay increases linearly - measured t_PLH rises to 10.0 ns at 100 pF (V_CC = 3.3 V, T_A = 25 °C).

Does this part support partial power-down or I^OFF protection?

No - the 74LVQ32TTR lacks I^OFF circuitry. When V_CC = 0 V, inputs and outputs exhibit high-impedance behavior only due to internal protection diodes being reverse-biased; no active isolation is provided. External series resistors are recommended if hot-insertion or bus-sharing is required.

Can the 74LVQ32TTR operate at 1.8 V supply?

No - the recommended operating range is strictly 2.0 V to 3.6 V. At 1.8 V, DC parameters (e.g., V_OH, V_OL) fall outside specification, and AC performance degrades significantly (t_PD exceeds 20 ns). The 1.2 V data retention rating applies only to static storage, not functional operation.