Nexperia USA Inc. 74LVC244ADB,118

Overview

74LVC244ADB,118 from Nexperia is an octal 3-state buffer/line driver in SO20 (SOT163-1) package, designed for bidirectional bus interfacing and level translation between 1.2 V–3.6 V logic domains. It features dual independent output enables (1OE, 2OE), Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and 5.5 V overvoltage-tolerant inputs-enabling robust operation in mixed-voltage industrial control backplanes.

For engineers reviewing the 74LVC244ADB,118 datasheet, 74LVC244ADB,118 pinout, 74LVC244ADB,118 application, or 74LVC244ADB,118 equivalent, this device serves as a voltage-flexible, low-power bus driver with precise timing control (tpd ≤ 5.9 ns at 3.3 V), high-impedance isolation during power sequencing, and JEDEC-compliant ESD robustness (HBM > 2000 V).

Technical Context

This device implements two independent 4-bit buffered paths, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0'–Y3'). Its CMOS architecture supports rail-to-rail input thresholds defined per JEDEC standards (JESD8-7A/5A/C), enabling interoperability across 1.65 V, 2.5 V, and 3.3 V logic families.

The IOFF circuit ensures outputs enter high-impedance state when VCC = 0 V, preventing backflow current during hot insertion or partial system power-down. Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), tolerating slow-rising signals up to 20 ns/V transition rate without oscillation.

Key Specifications

Pinout & Package

74LVC244ADB,118 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, JEDEC MS-013 compliant. Pin 1 index located at top-left corner with notch marking orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC244APW,118, the SO20 package offers superior mechanical stability for wave-soldered industrial assemblies; compared with SN74LVC244APWR, the Nexperia variant provides more robust IOFF behavior under marginal VCC conditions, reducing risk of backfeed in modular power architectures.

Availability

74LVC244ADB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, test equipment signal routing, and medical diagnostic interface cards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC244ADB,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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer applications.

The 74LVC244A series belongs to Nexperia's advanced LVC logic family, engineered specifically for low-voltage, high-noise-immunity bus interfacing in harsh electromagnetic environments where power efficiency and signal integrity are critical.

FAQ

Can 74LVC244ADB,118 drive 5 V logic inputs directly?

Yes - its inputs tolerate up to 5.5 V regardless of VCC level, allowing direct connection to 5 V TTL outputs without level shifters. This capability is explicitly guaranteed in Table 5 (Recommended Operating Conditions) and Table 4 (Limiting Values) of the Nexperia datasheet Rev. 14.

Does this device include bus hold circuitry?

No - the 74LVC244A variant (including 74LVC244ADB,118) does not feature bus hold. Only the 74LVCH244A version includes bus hold on data inputs. This distinction is confirmed in Section 2 (Features and benefits) and Table 6 (Static characteristics) footnote [3].

What is the maximum capacitive load this buffer can drive reliably?

It reliably drives 50 pF loads with specified timing (tpd ≤ 5.9 ns, tdis ≤ 7.5 ns) at VCC = 3.3 V, as validated in Table 9 (Test data) using 50 pF CL and 500 Ω RL. Driving >50 pF increases propagation delay nonlinearly and may violate setup/hold margins in high-speed interfaces.

Is the SO20 package RoHS-compliant and lead-free?

Yes - the SOT163-1 package used in 74LVC244ADB,118 is fully RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity level (MSL-3) requirements per the official Nexperia product change notice PCN-2023-017.