Nexperia USA Inc. 74VHC244D,118

Overview

74VHC244D,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in SO20 (SOT163-1) package, operating from 2.0 V to 5.5 V with CMOS input levels. It features balanced propagation delays (as low as 3.4 ns at 5 V/15 pF), Schmitt-trigger inputs for noise immunity, and supports industrial temperature range (−40 °C to +125 °C). It is used for bidirectional bus interfacing and address/data line driving in microcontroller peripheral expansion systems.

For engineers reviewing the 74VHC244D,118 datasheet, 74VHC244D,118 pinout, 74VHC244D,118 application, or 74VHC244D,118 equivalent, key selection criteria include 3-state output control timing (enable/disable times ≤9.5 ns), input voltage tolerance above V_CC, ESD robustness (HBM >2000 V), and compatibility with 3.3 V and 5 V logic domains in mixed-voltage board designs.

Technical Context

This device implements two independent 4-bit non-inverting buffer groups (Group 1: pins 1A0–1A3 → 1Y0–1Y3; Group 2: 2A0–2A3 → 2Y0–2Y3), each controlled by a dedicated active-low output enable (1OE, 2OE). All inputs accept voltages up to 7.0 V regardless of V_CC, enabling level translation between higher-voltage sensors and lower-voltage logic.

The SO20 package (SOT163-1) provides 20 leads with 1.27 mm pitch and 7.5 mm body width, supporting standard PCB assembly and thermal dissipation up to 500 mW at −40 °C to +125 °C ambient. Static drive capability is ±8 mA at V_CC = 4.5 V, with guaranteed VOH ≥3.70 V and VOL ≤0.55 V under load.

Key Specifications

Pinout & Package

74VHC244D,118 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, 1.27 mm lead pitch, with gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74VHC244D,118, the 74VHCT244D,118 trades input voltage flexibility for TTL compatibility, while the SN74LVC244APWR offers speed and low-voltage operation at the cost of absolute maximum input rating - making the 74VHC244D,118 uniquely suited for robust mixed-signal industrial interfaces.

Availability

74VHC244D,118 is available at Aetrix Electronics and suitable for microcontroller bus expansion, industrial I/O modules, automotive body control units, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74VHC244D,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 applications.

The 74VHC series targets high-speed, low-power CMOS logic applications requiring wide supply voltage range and robust noise immunity - specifically engineered for mixed-voltage system interfacing and bus isolation in demanding environments.

FAQ

What is the maximum clock frequency supported by 74VHC244D,118?

The 74VHC244D,118 is not a clocked device but a combinational buffer. Its usable data rate depends on propagation delay and load capacitance. With t_pd = 3.4 ns (typ) at 5 V/15 pF, it supports clean signal transmission up to ~100 MHz for short traces. For reliable 50% duty-cycle square waves, limit toggle frequency to ≤70 MHz to maintain timing margins under worst-case conditions.

Can 74VHC244D,118 drive a 50 pF load at 5 V while maintaining specified timing?

Yes. At V_CC = 5.0 V and C_L = 50 pF, the datasheet guarantees t_pd ≤7.0 ns, t_en ≤9.5 ns, and t_dis ≤11.5 ns across −40 °C to +125 °C. Output drive strength remains sufficient (V_OH ≥3.70 V, V_OL ≤0.55 V at I_O = ±8 mA), confirming full functionality under this load condition.

Is the SO20 package (SOT163-1) RoHS compliant and lead-free?

Yes. The 74VHC244D,118 in SO20 package is manufactured per RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) lead finish. The package complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30 °C/60% RH.

How does the Schmitt-trigger input improve noise immunity in real-world layouts?

Schmitt-trigger inputs provide 0.4–0.6 V hysteresis (depending on V_CC), meaning the rising threshold (V_IH) is ~0.5 V higher than the falling threshold (V_IL). This prevents multiple output transitions when input signals cross the logic threshold slowly due to ringing, crosstalk, or long trace inductance - a common cause of spurious interrupts in noisy industrial environments.