NXP Semiconductors 74LVC244APW/AUJ

Overview

74LVC244APW/AUJ from Nexperia is an octal 3-state buffer/line driver in TSSOP20 package, operating from 1.2 V to 3.6 V supply, with dual active-low output enables (1OE, 2OE), overvoltage-tolerant inputs up to 5.5 V, and Schmitt-trigger inputs for noise immunity-used in bidirectional bus interfacing between mixed-voltage domains in industrial control backplanes.

For engineers reviewing the 74LVC244APW/AUJ datasheet, 74LVC244APW/AUJ pinout, 74LVC244APW/AUJ application, or 74LVC244APW/AUJ equivalent, key selection criteria include 3-state timing (tpd ≤ 7.5 ns at 3.3 V), IOFF-enabled partial power-down protection, and compatibility with both 3.3 V and 5 V logic levels without level shifters.

Technical Context

This device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low enable (1OE for Y0–Y3, 2OE for Y0–Y3 of second group). All inputs feature Schmitt-trigger action, enabling robust operation with slow-rising signals and reducing susceptibility to noise-induced glitches.

The IOFF circuit ensures outputs enter high-impedance state when VCC = 0 V, blocking damaging backflow current during hot-insertion or partial system power-down. Input voltage tolerance to 5.5 V allows direct connection to 5 V sources while powered from 1.2–3.6 V supplies-enabling seamless voltage translation in heterogeneous digital systems.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1), 4.4 mm body width, 0.65 mm pitch, 20-terminal surface-mount plastic thin shrink small outline package with exposed pad not required for thermal or electrical connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH244APW, the 74LVC244APW lacks bus hold but reduces input leakage by 30% at 1.8 V; versus SN74LVC244APWR, it offers identical timing and drive strength but differs in traceability documentation and AEC-Q200 alignment for industrial use cases.

Availability

74LVC244APW/AUJ is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, and medical diagnostic data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC244APW/AUJ 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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and automotive markets.

The 74LVC244A product line delivers robust, low-voltage octal buffers designed specifically for voltage translation, bus isolation, and noise-immune signal conditioning in mixed-supply embedded systems.

FAQ

What is the maximum input voltage rating for 74LVC244APW/AUJ?

The 74LVC244APW/AUJ supports input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5 V logic sources while operating from as low as 1.2 V supply-this eliminates external level-shifting circuitry in mixed-voltage systems and is validated per datasheet Table 4 and Table 5.

Does 74LVC244APW/AUJ support partial power-down operation?

Yes, the 74LVC244APW/AUJ incorporates IOFF circuitry that disables outputs and limits leakage to ±10 μA when VCC = 0 V, preventing back-current flow during hot-swap or asymmetric power sequencing-confirmed in Section 1 and Table 9 of the Nexperia datasheet Rev. 14.

What is the propagation delay of 74LVC244APW/AUJ at 3.3 V supply?

At VCC = 3.3 V and -40 °C to +125 °C, the 74LVC244APW/AUJ exhibits a maximum propagation delay (tpd) of 7.5 ns for input-to-output transitions, as specified in Table 7 of the datasheet-ensuring reliable operation in 133 MHz synchronous bus environments with timing margin.

Is the 74LVC244APW/AUJ pin-compatible with 74LVCH244APW?

Yes, the 74LVC244APW/AUJ and 74LVCH244APW share identical pinout, package (TSSOP20), and electrical specifications except that 74LVCH244APW adds bus hold on data inputs-no PCB layout change is needed when upgrading, though bus hold behavior must be verified in system-level testing.

What package type does 74LVC244APW/AUJ use?

The 74LVC244APW/AUJ uses the TSSOP20 package (SOT360-1), a 20-pin plastic thin shrink small outline package with 4.4 mm body width and 0.65 mm lead pitch-fully documented in Figure 8 and Table 1 of the Nexperia datasheet Rev. 14.