onsemi 74ALVC162240T

Overview

74ALVC162240T from Fairchild Semiconductor is a low-voltage 16-bit inverting buffer/line driver with 3-STATE outputs, 3.6V-tolerant I/O, and integrated 26Ω series output resistors. It operates from 1.65V to 3.6V V_CC, delivers 3.8 ns max propagation delay at 3.3V, and supports nibble-level (4-bit) 3-STATE control for memory address and clock distribution in compact PCB layouts.

For engineers reviewing the 74ALVC162240T datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6V I/O tolerance across 1.65–3.6V supply range, deterministic 3-STATE timing (t_PZL/t_PLZ ≤ 9.8 ns), on-die 26Ω series termination, and JEDEC MO-153 TSSOP-48 package compatibility.

Technical Context

The 74ALVC162240T implements sixteen independent inverting buffers grouped into four 4-bit nibbles, each with dedicated active-low Output Enable (OE_n) inputs-enabling selective bus isolation without full-width control logic. Its advanced CMOS process ensures high-speed operation while maintaining sub-40 µA quiescent ICC at 3.6V.

All inputs and outputs tolerate up to 3.6V regardless of V_CC level (1.65–3.6V), and built-in 26Ω series resistors suppress transmission-line ringing in point-to-point or stubbed bus topologies-critical for clean signal integrity in memory address drivers and clock fanout applications.

Key Specifications

Pinout & Package

74ALVC162240T is housed in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch. The package supports fine-pitch routing and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVC162240DGGR and 74LVC162240ADGG, the 74ALVC162240T provides guaranteed on-die 26Ω termination and identical Fairchild-spec timing-making it optimal for rapid prototyping and space-constrained designs where external resistors are impractical.

Availability

74ALVC162240T is available at Aetrix Electronics and suitable for memory address driving, clock distribution, PCI bus interfacing, and hot-swappable backplane applications requiring stable component supply and long-term obsolescence management.

Supply support for 74ALVC162240T 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 designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The ALVC (Advanced Low-Voltage CMOS) family-including the 74ALVC162240T-was engineered for low-power, high-speed bus interface in portable and embedded systems operating across 1.65–3.6V supply rails.

FAQ

What is the maximum operating temperature range for the 74ALVC162240T?

The 74ALVC162240T is rated for free-air operating temperatures from −40°C to +85°C, meeting industrial-grade thermal requirements. This range is verified across all specified V_CC levels (1.65V–3.6V) and load conditions (CL = 30–50 pF). Thermal derating is not required within this envelope, and the device maintains full AC/DC performance specifications across the entire span. The 74ALVC162240T's latchup immunity (JEDEC JED78) and ESD robustness (>2000V HBM) remain effective throughout this temperature window.

Does the 74ALVC162240T require external pull-up resistors on OE pins?

Yes-the 74ALVC162240T datasheet explicitly recommends tying each OEn input to V_CC via a pull-up resistor during power-up/down to guarantee high-impedance outputs. The minimum resistor value depends on the driver's current-sourcing capability; typical values range from 4.7 kΩ to 10 kΩ. Without this, floating OE pins may cause undefined output states, risking bus contention. This requirement applies to all four OE inputs (OE1–OE4) and is critical for reliable 3-STATE behavior in the 74ALVC162240T.

Can the 74ALVC162240T drive 50 pF loads at 3.3V with guaranteed timing?

Yes-the 74ALVC162240T's AC Electrical Characteristics table specifies t_PHL/t_PLH ≤ 3.8 ns and t_PZL/t_PLZ ≤ 4.3 ns under CL = 50 pF, RL = 500Ω, and V_CC = 3.3V ± 0.3V. These values are production-tested limits, not typicals. The 74ALVC162240T's integrated 26Ω series resistors further stabilize edge rates into such loads, reducing overshoot and ensuring signal integrity without additional damping components.

Is the 74ALVC162240T pin-compatible with standard 74-series 16-bit buffers like the 74AC162240?

No-the 74ALVC162240T uses a 48-pin TSSOP (MTD48) package with nibble-level OE control (four OE pins), whereas legacy 74AC162240 variants typically use 48-pin SOIC or SSOP with only two global OE inputs. Pin assignments, power pin distribution (dual V_CC/GND pairs), and output resistor integration differ fundamentally. Substituting the 74ALVC162240T into an AC-based design requires PCB revision and firmware updates to manage four independent OE signals.

What does "3.6V tolerant inputs and outputs" mean for the 74ALVC162240T in practice?

It means the 74ALVC162240T's I/O pins safely accept and drive DC voltages up to 3.6V-even when V_CC is as low as 1.65V-without damage or leakage exceeding ±10 µA. This enables direct connection to 3.3V buses while powered from 1.8V logic rails, eliminating level shifters. The 74ALVC162240T maintains full functionality (propagation delay, 3-STATE control, noise immunity) under this condition, as confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables.