STMicroelectronics 74LVX16373TTR

Overview

74LVX16373TTR from STMicroelectronics is a low-voltage CMOS 16-bit D-type transparent latch with non-inverting 3-state outputs, 5V-tolerant inputs, and TSSOP-48 package. It operates from 2V to 3.6V, delivers 5.4 ns max propagation delay at 3V, supports 4 mA min output drive, and features power-down input protection enabling safe 5V-to-3.3V interfacing in battery-powered data-path buffering.

For engineers reviewing the 74LVX16373TTR datasheet, 74LVX16373TTR pinout, 74LVX16373TTR application, or 74LVX16373TTR equivalent, key selection criteria include 5V-tolerant input compatibility, symmetrical 4 mA output drive, 2–3.6V operating range, latch-enable timing margins (tW = 5 ns min), and TSSOP-48 thermal and routing constraints for high-density PCBs.

Technical Context

This device implements two independent 8-bit latch sections (1D–1Q and 2D–2Q), each controlled by dedicated active-low latch enable (1LE/2LE) and active-low output enable (1OE/2OE) signals. Latching occurs on the falling edge of LE; outputs remain transparent while LE is high.

Input protection allows 0–7 V input voltage regardless of VCC, enabling robust level translation. All I/O pins feature 2 kV ESD immunity, and the sub-micron C2MOS process ensures low ICC (4 µA max) and low noise (VOLP = 0.3 V typ at 3.3 V).

Key Specifications

Pinout & Package

TSSOP-48 (Thin Shrink Small Outline Package), 12.6 mm × 8.1 mm body, 0.5 mm pitch, 1.2 mm height - optimized for automated SMT assembly and thermal dissipation in compact board layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit transparent latch applications.

Compared with SN74LVCH16373A and 74ALVC16373, the 74LVX16373TTR uniquely balances 5V tolerance, ultra-low quiescent current, and TSSOP-48 manufacturability - making it optimal for cost-sensitive, battery-powered, and mixed-voltage embedded systems requiring long-term supply stability.

Availability

74LVX16373TTR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, portable medical data loggers, automotive body control modules, and test equipment digital pattern generators requiring stable component supply across multi-year production cycles.

Supply support for 74LVX16373TTR 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 markets.

The 74LVX series targets low-voltage, low-power, 3.3 V logic applications with 5V-tolerant I/O - specifically engineered for battery-operated, noise-sensitive, and mixed-voltage system integration.

FAQ

Can the 74LVX16373TTR operate with VCC = 1.8 V?

No. The recommended operating VCC range is 2.0 V to 3.6 V, with data retention down to 1.2 V. At 1.8 V, DC parameters including VIH (min 1.5 V) and VOL (max 0.55 V at 4 mA) fall outside guaranteed specifications, risking logic misreads and increased static power. Operation below 2.0 V is not characterized or supported.

What is the maximum clock/data frequency supported by the 74LVX16373TTR?

The device does not use a clock; it is edge-triggered by the latch enable (LE) signal. With tPD = 5.4 ns (max) and tW(LE) = 5 ns (min), the maximum reliable latch rate is ~100 MHz for repetitive data capture. For one-shot latching, setup/hold times (tS = 4 ns, th = 1 ns at 3.3 V) define the minimum valid LE transition window relative to data stability.

Are the 1Q and 2Q outputs truly isolated when their respective OE pins are HIGH?

Yes. When 1OE or 2OE is HIGH, the corresponding Q outputs enter high-impedance state with IOZ ≤ ±2.5 µA leakage (at VCC = 3.6 V). This isolation is electrically verified per AC/DC specs and enables true bus-sharing between independent 8-bit ports without contention or loading effects.

Does the 74LVX16373TTR require external pull-up or pull-down resistors on unused inputs?

No. All inputs feature built-in protection diodes and are 5V-tolerant, but they lack internal termination. Unused inputs must be tied to VCC or GND to prevent floating states that cause increased ICC, noise susceptibility, or unintended latching. Leaving inputs unconnected violates recommended operating conditions and may induce erratic behavior.