onsemi 74LVT162240MEA

Overview

74LVT162240 from Fairchild Semiconductor is a low-voltage 16-bit inverting buffer/line driver with 3-STATE outputs, 25 Ω integrated series output resistors, and operation at 2.7–3.6 V supply. It features nibble-level (4-bit) output enable control, TTL-compatible 5 V input tolerance, and is designed for memory address driving, clock distribution, and bus transceiver applications in 3.3 V systems interfacing to 5 V logic.

For engineers reviewing the 74LVT162240 datasheet, pinout, applications, or equivalent options, key selection considerations include its 25 Ω built-in output termination, absence of bushold (unlike LVTH variant), 4.8 ns max propagation delay at 3.3 V, 12 mA drive strength, and SSOP-48 package compatibility with JEDEC MO-118.

Technical Context

The 74LVT162240 implements sixteen independent inverting buffers, each with active-low 3-STATE control per nibble (OE1–OE4), enabling flexible 4-, 8-, or 16-bit bus isolation. Its BiCMOS process delivers ABT-class speed while maintaining LVT power efficiency.

It integrates matched 25 Ω series resistance in both HIGH and LOW output states-eliminating external termination and reducing overshoot/undershoot in high-speed address and clock lines. Unlike the LVTH variant, it lacks bushold inputs, requiring external pull-ups on unused data pins.

Key Specifications

Pinout & Package

74LVT162240 is housed in a 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118 compliant, 0.300" wide, with 0.5 mm lead pitch and exposed thermal pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting buffer/line driver applications.

Compared with 74LVTH162240MEA, the 74LVT162240 omits bushold-reducing input leakage and cost-but requires external biasing. Against SN74LVC16240ADGGR, it trades higher drive and smaller geometry for essential 5 V tolerance and built-in termination, making it superior for mixed-voltage bus interfaces.

Availability

74LVT162240 is available at Aetrix Electronics and suitable for memory address drivers, clock distribution networks, and industrial backplane interfaces requiring stable component supply, long-term lifecycle support, and consistent SSOP-48 packaging.

Supply support for 74LVT162240 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 designer acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The 74LVT162240 belongs to Fairchild's Low-Voltage TTL (LVT) logic family, engineered for high-speed 3.3 V bus interfacing with backward compatibility to 5 V TTL systems-targeting memory, clock, and control-path applications in embedded and communications equipment.

FAQ

What is the function of the 74LVT162240?

The 74LVT162240 is a 16-bit inverting buffer/line driver with 3-STATE outputs and integrated 25 Ω series resistors. It functions as a voltage-level translator and signal conditioner between 3.3 V logic and 5 V TTL buses. Its nibble-controlled OE inputs allow segmented bus isolation, and its BiCMOS design delivers fast propagation (≤4.8 ns) with low power-making the 74LVT162240 ideal for memory addressing and clock distribution in mixed-voltage systems.

Does the 74LVT162240 support 5 V inputs?

Yes, the 74LVT162240 supports input voltages from 0 V to 5.5 V, enabling direct connection to 5 V TTL outputs without level-shifting circuitry. This 5 V tolerance is explicitly specified in the DC Electrical Characteristics table under "VI Input Voltage" (0–5.5 V). The 74LVT162240 leverages this feature to serve as a bridge between legacy 5 V peripherals and modern 3.3 V controllers-critical in upgrade paths and industrial retrofits.

What is the purpose of the 25 Ω series resistors in the 74LVT162240 outputs?

The 25 Ω series resistors in the 74LVT162240 outputs are integrated into both HIGH and LOW output paths to dampen signal reflections on PCB traces, reducing overshoot and undershoot without requiring external components. This design eliminates 16 discrete resistors, saves board space, and improves signal integrity on stubs up to 10 cm-particularly valuable in memory address and clock routing. The 74LVT162240 achieves this while maintaining full 3-STATE control and drive strength.

How does the 74LVT162240 differ from the 74LVTH162240?

The 74LVT162240 lacks bushold inputs, whereas the 74LVTH162240 includes them to maintain input logic state without external pull-ups. Both share identical pinout, 25 Ω outputs, timing, and 5 V tolerance. The 74LVT162240 is preferred where inputs are always actively driven; the 74LVTH162240 adds robustness in systems with floating or intermittently driven lines. Neither part is pin-compatible with non-LVT/LVTH variants due to differing internal termination and biasing schemes.

What package options are available for the 74LVT162240?

The 74LVT162240 is offered exclusively in the 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118 compliant, 0.300" wide, with package number MS48A. It is supplied in tube format (74LVT162240MEA); tape-and-reel is not listed for this variant in the official Fairchild documentation. The SSOP-48 footprint provides mechanical stability and thermal performance suitable for industrial PCB layouts, and is distinct from the TSSOP-48 used by some LVTH variants.