Nexperia USA Inc. 74HC27DB,118

Overview

74HC27DB,118 from Nexperia is a triple 3-input NOR gate logic IC in SSOP14 (SOT337-1) package, operating from 2.0 V to 6.0 V supply, with propagation delay as low as 8 ns at VCC = 6.0 V and CL = 15 pF, CMOS-level input compatibility, and guaranteed operation from −40 °C to +125 °C. It integrates clamp diodes on all inputs for robust interfacing to overvoltage signals.

For engineers reviewing the 74HC27DB,118 datasheet, 74HC27DB,118 pinout, 74HC27DB,118 application, or 74HC27DB,118 equivalent, this device serves as a high-noise-immunity combinational logic building block in industrial control sequencing, power-on reset coordination, and bus arbitration circuits where precise 3-input NOR functionality and wide-voltage rail tolerance are required.

Technical Context

The 74HC27DB,118 implements three independent 3-input NOR gates using standard CMOS process technology, with each gate exhibiting symmetrical HIGH/LOW output voltage thresholds referenced to VCC. Input clamp diodes enable safe interface to signals exceeding VCC when used with current-limiting resistors.

Its static characteristics include VIH(min) = 4.2 V and VIL(max) = 1.8 V at VCC = 6.0 V, VOH(min) = 5.48 V at IO = −5.2 mA, and VOL(max) = 0.26 V at IO = 5.2 mA - confirming rail-to-rail compatible switching performance under load across the full temperature range.

Key Specifications

Pinout & Package

74HC27DB,118 uses the SSOP14 (SOT337-1) package: plastic shrink small outline, 14 leads, body width 5.3 mm, pitch 0.65 mm, lead length 0.5 mm, total length 6.2 mm. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple 3-input NOR gate applications.

Compared with 74HC27D,653 and SN74HC27N, the 74HC27DB,118 delivers superior board-area efficiency via SSOP14, tighter thermal derating (7.3 mW/K above 81 °C), and full −40 °C to +125 °C qualification - making it optimal for space-constrained, thermally demanding industrial modules.

Availability

74HC27DB,118 is available at Aetrix Electronics and suitable for industrial PLC input decoding, power sequencing control, legacy bus arbitration, and LED matrix row enable logic requiring stable component supply, long-term lifecycle support, and guaranteed −40 °C to +125 °C operation.

Supply support for 74HC27DB,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 leading Dutch semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in automotive-grade and industrial reliability assurance.

The 74HC27DB,118 belongs to Nexperia's 74HC logic family - engineered for low-power, high-speed CMOS-compatible digital interfacing in harsh-environment industrial and infrastructure applications.

FAQ

Can 74HC27DB,118 interface directly with 3.3 V microcontroller GPIOs?

Yes. With VCC = 3.3 V, its VIH(min) = 2.1 V and VIL(max) = 1.35 V (per Table 6), fully accommodating standard 3.3 V CMOS logic levels. Output VOH(min) = 2.97 V and VOL(max) = 0.26 V at IO = ±4 mA ensure noise margins >0.6 V in typical configurations.

Does 74HC27DB,118 support mixed-voltage operation (e.g., 5 V inputs with 3.3 V supply)?

No - inputs must remain within 0 V to VCC. However, integrated input clamp diodes allow safe interface to voltages > VCC when series current-limiting resistors are used, per Section 1 of the datasheet. Direct 5 V input into a 3.3 V-powered device is not permitted without external protection.

What is the maximum capacitive load the outputs can drive reliably?

At VCC = 4.5 V and Tamb = 25 °C, the output maintains tpd ≤ 23 ns and tt ≤ 19 ns with CL = 50 pF (Table 9). For stable operation across −40 °C to +125 °C, design for CL ≤ 30 pF to retain timing margin and avoid excessive transition time degradation.

Is the SSOP14 (SOT337-1) package RoHS-compliant and lead-free?

Yes. Per Nexperia's product compliance documentation, 74HC27DB,118 is manufactured in full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound.