Nexperia USA Inc. 74LVT2244DB,118

Overview

74LVT2244DB,118 from Nexperia is a 3.3 V octal 3-state buffer/line driver with integrated 30 Ω series output termination resistors, dual independent output enables (1OE, 2OE), bus-hold inputs, and ±12 mA drive capability. It functions as two 4-bit or one 8-bit interface buffer in memory address, clock distribution, and high-speed bus applications operating from −40 °C to +85 °C.

For engineers reviewing the 74LVT2244DB,118 datasheet, 74LVT2244DB,118 pinout, 74LVT2244DB,118 application, or 74LVT2244DB,118 equivalent, key selection criteria include its 30 Ω on-die termination for noise suppression, overvoltage-tolerant 5.5 V inputs, BiCMOS speed/power trade-off, and compatibility with TTL-level signaling in mixed-voltage systems.

Technical Context

The 74LVT2244DB,118 implements dual 4-bit 3-state buffers with separate active-low output enables (1OE controls Y0–Y3; 2OE controls Y0′–Y3′), enabling independent bus segment control. Its BiCMOS output stage integrates 30 Ω series resistance in both HIGH and LOW states to dampen reflections without external resistors.

Bus-hold circuitry maintains valid logic states on unused inputs without external pull-ups, while IOFF protection ensures low leakage during partial power-down. The device supports live insertion and meets JESD78 Class II latch-up (>500 mA) and JEDEC JS-001/JS-002 ESD ratings (HBM >2000 V, CDM >1000 V).

Key Specifications

Pinout & Package

74LVT2244DB,118 is packaged in SSOP20 (SOT339-1), a 20-pin plastic shrink small outline package with 0.65 mm lead pitch and 7.2 mm body width. Pin 1 is marked by a notch or dot; leads are gull-wing shaped for surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVT2244DB,118 uniquely combines on-die 30 Ω termination, bus-hold, and IOFF in a single 20-pin SSOP, reducing design complexity for noise-sensitive industrial bus interfaces where reliability under partial power conditions is mandatory.

Availability

74LVT2244DB,118 is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, backplane interfaces, and mixed-voltage I/O bridging requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT2244DB,118 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer electronics.

The 74LVT2244DB,118 belongs to Nexperia's LVT (Low-Voltage TTL) logic family, engineered for high-speed 3.3 V bus interfacing with robust noise immunity and mixed-voltage interoperability in demanding embedded systems.

FAQ

Does 74LVT2244DB,118 support hot-swap insertion?

Yes. Its IOFF circuitry ensures outputs remain in high-impedance state with leakage <100 μA when VCC = 0 V, and it meets JESD78 Class II latch-up immunity (>500 mA). This enables safe insertion into live 3.3 V backplanes without disrupting bus operation or damaging connected devices.

Can 74LVT2244DB,118 drive a 5 V bus directly?

Yes. Its outputs are rated for 5 V-tolerant operation in HIGH/LOW states, and its ±12 mA drive strength sustains valid logic levels on 5 V buses without external level shifters. Inputs accept 0–5.5 V regardless of VCC, enabling direct connection to 5 V sources.

What is the purpose of the 30 Ω series termination?

The 30 Ω resistor is integrated into each output driver path (both HIGH and LOW states) to match typical PCB trace impedance (≈50 Ω differential / ≈25–35 Ω single-ended), suppressing reflections, overshoot, and ground bounce in high-speed digital interfaces up to 150 MHz.

How does bus-hold functionality affect unused inputs?

Bus-hold circuitry applies weak feedback (±75–150 μA) to maintain the last-driven logic state on unconnected inputs, eliminating need for external pull-up/down resistors. This prevents floating inputs from drifting near switching thresholds and causing erratic behavior or increased dynamic power consumption.