onsemi 74LCXZ162244MEX

Overview

74LCXZ162244 from Fairchild Semiconductor is a low-voltage 16-bit non-inverting buffer/line driver with 5V-tolerant I/O, 26 Ω integrated output series resistors, 3.3 V nominal supply operation, and nibble-level 3-STATE control. It serves as a memory/address bus driver or clock distribution buffer in mixed-voltage systems interfacing 3.3 V logic to 5 V buses.

For engineers reviewing the 74LCXZ162244 datasheet, pinout, applications, or equivalent options, key selection criteria include 5V I/O tolerance, guaranteed power-up/down high-impedance state, 5.3 ns max propagation delay at 3.0 V, ±12 mA drive capability, and built-in EMI-reduction circuitry.

Technical Context

The 74LCXZ162244 implements sixteen independent non-inverting buffers grouped into four 4-bit nibbles, each with dedicated active-low Output Enable (OEn) inputs. Its CMOS design ensures compatibility with 2.7–3.6 V VCC while accepting 0–5.5 V input signals and driving 5 V-tolerant outputs.

Each output integrates a nominal 26 Ω series resistor to suppress overshoot/undershoot without external components; the device guarantees high-impedance outputs during power-up/down (VCC = 0–1.5 V), enabling live insertion and hot-swap capability in backplane and modular systems.

Key Specifications

Pinout & Package

74LCXZ162244 is packaged in a 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" wide (Package Code: MS48A), with 0.5 mm lead pitch and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LCXZ162244, the 74LVC162244ADGG saves quiescent current but sacrifices 5 V tolerance and EMI suppression, while the SN74ALVC162244GR offers stronger drive but removes the critical power-up high-impedance guarantee essential for hot-swap reliability.

Availability

74LCXZ162244 is available at Aetrix Electronics and suitable for memory subsystems, backplane interfaces, hot-swap modules, and industrial I/O expansion requiring stable component supply and long-term obsolescence management.

Supply support for 74LCXZ162244 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

Fairchild Semiconductor was a U.S.-based analog and power IC manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and telecom infrastructure.

The LCXZ family was designed specifically for low-voltage, mixed-signal system interfacing-emphasizing 5 V tolerance, EMI reduction, and robust power sequencing behavior in mission-critical embedded platforms.

FAQ

What is the maximum operating temperature range for the 74LCXZ162244?

The 74LCXZ162244 is rated for free-air operating temperatures from –40 °C to +85 °C, making it suitable for industrial environments where ambient conditions exceed commercial-grade limits. This range is fully specified in the Recommended Operating Conditions table of the official Fairchild datasheet DS500251, and all DC and AC parameters are guaranteed across this span.

Does the 74LCXZ162244 require external pull-up or pull-down resistors on its OE pins?

No, the 74LCXZ162244 OE pins are active-low CMOS inputs with rail-to-rail voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V at VCC = 2.7–3.6 V), so they can be driven directly from compatible logic outputs. External resistors are unnecessary unless used for manual override or fail-safe default states, and unused inputs must be held HIGH or LOW per datasheet Note 4.

Can the 74LCXZ162244 safely drive a 50 pF load at 3.3 V supply?

Yes-the 74LCXZ162244's AC Electrical Characteristics specify tPHL/tPLH ≤ 5.3 ns (max) at VCC = 3.3 V ±0.3 V and CL = 50 pF, confirming full timing compliance under that load. Its ±12 mA drive strength at 3.0 V further ensures adequate signal slew rate and noise margin for such capacitive loads.

Is the 74LCXZ162244 pin-compatible with the standard 74LCX162244 (without 'Z')?

No-the 74LCXZ162244 includes patented noise/EMI reduction circuitry and integrated 26 Ω output series resistors, which are absent in the base 74LCX162244. While both share identical pinout and functional logic, the 'Z' variant modifies internal output structure and electrical behavior, making them functionally distinct despite mechanical compatibility.

What does the 'Z' suffix signify in the 74LCXZ162244 part number?

The 'Z' suffix in 74LCXZ162244 denotes Fairchild's proprietary implementation of integrated 26 Ω output series resistors and patented noise/EMI reduction circuitry-features explicitly called out in the device's full title and General Description. This distinguishes it from non-Z variants and confirms enhanced signal integrity and electromagnetic compatibility beyond standard LCX-family buffers.