STMicroelectronics 74LVX32TTR

Overview

74LVX32TTR from STMicroelectronics is a low-voltage CMOS quad 2-input OR gate with 5V-tolerant inputs, operating from 2V to 3.6V supply, delivering 4.4ns typical propagation delay at 3.3V, 4mA output drive, and 2µA max quiescent current - deployed in 3.3V logic interfacing between 5V and 3V systems.

For engineers reviewing the 74LVX32TTR datasheet, 74LVX32TTR pinout, 74LVX32TTR application, or 74LVX32TTR equivalent, key selection criteria include 5V input tolerance, symmetrical 4mA output drive, sub-5ns propagation delay at 3.3V, low-noise VOLP (0.3V typ), and TSSOP-14 package compatibility with space-constrained mixed-voltage digital interfaces.

Technical Context

The 74LVX32TTR implements four independent OR logic functions using sub-micron C2MOS technology with buffered outputs, enabling high noise immunity and stable switching across its 2V–3.6V operating range. Its input structure accepts 0–7V regardless of VCC, supporting robust 5V-to-3.3V level translation without external components.

All inputs feature power-down protection and 2kV ESD immunity; outputs exhibit balanced |IOH| = |IOL| ≥ 4mA and matched tPLH ≅ tPHL propagation delays, minimizing timing skew in synchronous logic paths. Dynamic specifications are guaranteed under CL = 15pF and 50pF loads with 3ns input rise/fall times.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9mm × 6.4mm body, 0.65mm pitch, 1.2mm height, lead-free and RoHS-compliant.

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 74AHC32PW,118, the 74LVX32TTR uniquely combines 7V input tolerance with sub-5ns delay and µA-level quiescent current - making it the only choice for unbuffered 5V-to-3.3V OR logic in ultra-low-power, space-constrained applications.

Availability

74LVX32TTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical portable monitor front-ends, and network equipment status indicators requiring stable component supply across extended temperature ranges (–55°C to +125°C).

Supply support for 74LVX32TTR 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 74LVX series targets low-voltage, low-power 3.3V logic interfacing with 5V legacy systems - emphasizing robustness, noise immunity, and drop-in replaceability for legacy 74-series designs.

FAQ

Can 74LVX32TTR operate with VCC = 2.0V and still meet timing specs?

Yes. The device is fully specified down to 2.0V VCC: propagation delay is 10.7ns (max) at 2.7V/15pF and 13.5ns (max) at 2.7V/50pF per AC characteristics table. At 2.0V, timing degrades predictably within datasheet limits, supporting ultra-low-power modes where speed is secondary to energy efficiency.

What happens if an input exceeds VCC by more than 0.5V?

No damage occurs. Input pins tolerate –0.5V to +7.0V regardless of VCC value, verified per Absolute Maximum Ratings. Internal protection diodes clamp excess voltage to VCC or GND, and power-down protection ensures safe operation even when VCC = 0V - enabling hot-swap and partial-power-down use cases.

Is the 74LVX32TTR pin-compatible with standard 74LS32 or 74HC32?

Yes - it matches the 14-pin SO/TSSOP footprint and truth table of 74-series quad 2-input OR gates. However, unlike 74LS32 (5V-only) or 74HC32 (3.6V max input), the 74LVX32TTR adds 5V-tolerant inputs and operates down to 2V, making it a functional and physical upgrade without layout changes.

Does this device require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied to VCC or GND directly. The device's high input impedance (<1µA leakage) and built-in protection eliminate need for external biasing. Floating inputs are not recommended due to increased noise susceptibility and potential shoot-through current in marginal conditions.