NXP Semiconductors 74LV244N,112

Overview

74LV244N,112 from Nexperia is an octal 3-state buffer/line driver IC used for bidirectional bus interfacing and signal isolation in low-voltage digital systems. It features dual independent 4-bit sections (1A/1Y and 2A/2Y), two active-low output enables (1OE, 2OE), operates from 1.0 V to 5.5 V supply, and supports TTL-level inputs at VCC ≥ 2.7 V - commonly deployed in industrial control backplanes and legacy 3.3 V microcontroller I/O expansion.

For engineers reviewing the 74LV244N,112 datasheet, 74LV244N,112 pinout, 74LV244N,112 application, or 74LV244N,112 equivalent, key selection considerations include its wide VCC range (1.0–5.5 V), guaranteed operation down to 1.0 V, -40 °C to +125 °C temperature rating, 3-state timing (tpd ≤ 14 ns at 3.3 V), and SO20 package compatibility with legacy 74-series layouts.

Technical Context

The 74LV244N,112 implements a CMOS-based octal non-inverting buffer architecture with two independent 3-state control paths. Each section (1Yn and 2Yn) is driven by four dedicated inputs (1An, 2An) and enabled separately via 1OE and 2OE - enabling selective bus gating without contention. Inputs include clamp diodes for overvoltage tolerance with current-limiting resistors.

It complies with JEDEC standards JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), JESD8C (2.7–3.6 V), and JESD36 (4.5–5.5 V), and meets HBM ESD > 2000 V and CDM > 1000 V per JS-001/JS-002. Static and dynamic parameters are fully specified across -40 °C to +125 °C.

Key Specifications

Pinout & Package

74LV244N,112 is supplied in the SOT146-1 (SO20) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 marked with notch or index dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV244N,112, the 74LVC244APW,118 offers smaller footprint but sacrifices SO20 compatibility and extended temperature assurance, while SN74LV244ADWR matches the package but limits maximum operating temperature to +105 °C - making 74LV244N,112 the sole option validated for full -40 °C to +125 °C operation in SO20.

Availability

74LV244N,112 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system upgrades requiring stable component supply, long-term obsolescence mitigation, and SO20 footprint continuity.

Supply support for 74LV244N,112 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74LV244N,112 belongs to Nexperia's LV logic family - engineered for ultra-low power consumption and broad voltage interoperability in resource-constrained embedded systems and mixed-signal interfaces.

FAQ

What is the minimum supply voltage at which 74LV244N,112 guarantees full functionality?

The 74LV244N,112 guarantees full DC and AC functionality down to VCC = 1.0 V, with input levels referenced to GND or VCC. Static characteristics are fully specified from VCC = 1.2 V, and dynamic performance (e.g., tpd) is characterized down to 1.2 V. This makes 74LV244N,112 suitable for battery-powered or energy-harvesting systems operating near 1.0 V rails.

Does 74LV244N,112 support TTL-level inputs, and under what conditions?

Yes, 74LV244N,112 accepts TTL input levels when VCC is between 2.7 V and 3.6 V. In this range, VIH is guaranteed ≥ 2.0 V and VIL ≤ 0.8 V - compatible with standard TTL output thresholds. At VCC < 2.7 V or > 3.6 V, input thresholds scale with VCC (e.g., VIH = 0.7 × VCC), so TTL compatibility is not assured outside that window.

What is the maximum capacitive load 74LV244N,112 can drive while maintaining specified timing?

The 74LV244N,112 is characterized for timing with CL = 15 pF (tpd = 9 ns typical at 3.3 V) and CL = 50 pF (tpd ≤ 14 ns at 3.3 V). While it can drive heavier loads, propagation delay increases linearly with capacitance - for example, at CL = 100 pF, tpd may exceed 20 ns. For reliable timing-critical designs, keep total load ≤ 50 pF including trace and input capacitance.

How does the 3-state disable timing of 74LV244N,112 compare between enable and disable transitions?

At VCC = 3.3 V, the 74LV244N,112 exhibits tdis (disable time) ≤ 18 ns and ten (enable time) ≤ 18 ns - both measured from OE transition to output reaching 10 %/90 % of final level. The symmetry ensures balanced bus arbitration timing, critical for bidirectional data handshaking protocols where predictable release and acquisition windows are required.

Is 74LV244N,112 pin-compatible with older 74LS244 or 74HC244 devices?

No - although all are octal 3-state buffers, 74LV244N,112 uses the same SO20 pinout as 74HC244 and 74HCT244 (SOT146-1), but differs electrically: LV logic has lower drive strength, wider VCC range, and different input thresholds. It is not a drop-in replacement for 74LS244 (which uses different pinout and TTL-compatible levels). Always verify VCC, loading, and timing in the target system before substitution.