onsemi 74ALVC162244T

Overview

74ALVC162244T from ON Semiconductor is a low-voltage 16-bit non-inverting buffer/line driver with nibble-wise 3-STATE control, 3.6V-tolerant I/O, and integrated 26Ω output series resistors. It operates from 1.65V to 3.6V V_CC, delivers ≤3.8 ns propagation delay at 3.3V, and is used in memory address driving, clock distribution, and bus transceiver applications.

For engineers reviewing the 74ALVC162244T datasheet, pinout, applications, or equivalent options, key selection criteria include voltage tolerance (3.6V I/O), output impedance (26Ω series resistor), nibble-selectable 3-STATE control, and TSSOP-48 packaging for high-density PCB layouts.

Technical Context

The 74ALVC162244T implements four independent 4-bit groups, each controlled by dedicated active-low OE pins (OE1–OE4), enabling selective 4-bit bus isolation without affecting other nibbles. Its advanced CMOS process ensures high-speed operation while maintaining low static current (≤40 µA at 3.6V).

All inputs and outputs tolerate up to 3.6V regardless of V_CC level (1.65V–3.6V), supporting mixed-voltage interfacing. The built-in 26Ω series resistors suppress transmission-line ringing and EMI in high-speed address/clock lines, eliminating need for external termination resistors.

Key Specifications

Pinout & Package

74ALVC162244T is packaged in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1 mm wide, with exposed thermal pad (MTD48). Pin assignments follow standard logic buffer layout with dual-edge input/output symmetry and dedicated OE pins per nibble.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVC162244DGGR and 74LVC162244ADGG, the 74ALVC162244T uniquely combines 3.6V I/O tolerance, integrated 26Ω output resistors, and the fastest propagation delay (3.8 ns), making it optimal for mixed-voltage, high-speed bus interface where PCB space and signal integrity are constrained.

Availability

74ALVC162244T 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 parametric performance across temperature (−40°C to +85°C).

Supply support for 74ALVC162244T 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and computing markets.

The ALVC logic family - including the 74ALVC162244T - was designed for high-speed, low-voltage bus interface applications demanding 3.6V I/O tolerance, precise timing control, and robust ESD performance in dense PCB environments.

FAQ

What is the maximum operating voltage for 74ALVC162244T inputs and outputs?

The 74ALVC162244T supports 3.6V-tolerant inputs and outputs across its entire V_CC range (1.65V–3.6V). This means I/O pins can safely accept or drive signals up to 3.6V regardless of supply voltage - enabling direct interfacing with 3.3V or 5V-tolerant peripherals without external level shifters. This specification is verified per datasheet Absolute Maximum Ratings and DC Electrical Characteristics tables.

Does 74ALVC162244T require external pull-up resistors on OE pins?

Yes - to ensure defined high-impedance state during power-up or power-down, each OE pin (OE1–OE4) of the 74ALVC162244T should be tied to V_CC through a pull-up resistor. The minimum resistance value depends on the driver's current-sourcing capability; typical values range from 10 kΩ to 100 kΩ. This requirement is explicitly stated in Note 1 of the datasheet to prevent undefined output states.

What is the purpose of the 26Ω series resistor in 74ALVC162244T outputs?

The 26Ω series resistor integrated into each output of the 74ALVC162244T serves as source termination to dampen signal reflections on PCB traces. It reduces ringing and overshoot in high-speed applications such as memory address buses and clock distribution lines, particularly on FR-4 boards with trace lengths up to 15 cm. This eliminates the need for discrete 22–33Ω resistors, saving board space and assembly cost.

Can 74ALVC162244T be used in hot-swap applications?

Yes - the 74ALVC162244T supports live insertion and withdrawal due to its power-off high-impedance inputs and outputs. When V_CC is unpowered, all I/O pins enter a high-impedance state, preventing back-driving of live bus lines. This feature is confirmed in the datasheet Features section and enables safe use in modular backplane and field-replaceable unit designs.

How does the nibble-control architecture of 74ALVC162244T improve system design?

The 74ALVC162244T features four independent OE inputs (OE1–OE4), each controlling a 4-bit nibble (I0–I3/O0–O3, etc.). This allows selective 4-bit bus isolation - for example, enabling only the lower byte during a peripheral read while keeping upper byte drivers disabled. This reduces bus contention, lowers dynamic power, and simplifies timing-critical arbitration in multi-master systems without requiring full 16-bit disable.