Nexperia USA Inc. 74HC05D,112

Overview

74HC05D,112 from Nexperia is a hex inverter IC with six independent open-drain CMOS outputs, designed for level-shifting, wired-OR logic, and bus interface applications. It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers 15 ns typical propagation delay at 4.5 V supply. Its open-drain architecture enables active-LOW wired-OR and active-HIGH wired-AND configurations when externally pulled up.

For engineers reviewing the 74HC05D,112 datasheet, 74HC05D,112 pinout, 74HC05D,112 application, or 74HC05D,112 equivalent, key selection criteria include open-drain drive capability, wide VCC tolerance, industrial temperature rating, and SO14 package compatibility with legacy 74-series footprints.

Technical Context

The 74HC05D implements six identical inverting buffers with true open-drain outputs-no internal pull-up-requiring external resistors for HIGH-level assertion. Each gate exhibits symmetrical input thresholds (VIH = 3.15 V, VIL = 1.35 V at VCC = 4.5 V) and low output leakage (±0.5 μA OFF-state).

Its dynamic behavior is characterized by tPLZ/tPZL ≤ 27 ns and tTHL ≤ 22 ns over full temperature range at 4.5 V, with CPD = 4 pF per inverter enabling precise dynamic power estimation (PD = CPD × VCC² × fi × N).

Key Specifications

Pinout & Package

74HC05D,112 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 is index-marked; pin 7 is GND; pin 14 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter with open-drain applications.

Compared with 74HC05D,112, the 74LVC05PW offers higher speed at lower voltage but sacrifices industrial temperature support, while the SN74HC05N retains full electrical equivalence at the cost of modern packaging and thermal performance.

Availability

74HC05D,112 is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive body control modules, and embedded system reset management requiring stable component supply across extended temperature ranges.

Supply support for 74HC05D,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 delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.

The 74HC05D belongs to Nexperia's 74HC logic family-engineered for robust, drop-in replacement of legacy TTL and earlier CMOS logic in industrial, consumer, and communication equipment.

FAQ

Can 74HC05D,112 drive an LED directly?

No. The 74HC05D has open-drain outputs only and cannot source current. To drive an LED, connect the anode to VCC and the cathode to an output pin; the device will sink current when LOW. Maximum sink current is 5.2 mA at 6.0 V, limiting LED brightness-add a series resistor to limit current to ≤5 mA.

Is a pull-up resistor required on every open-drain output?

Yes. Each 1Y–6Y output must have a dedicated or shared pull-up resistor to a valid logic HIGH voltage (e.g., 3.3 V or 5 V). Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and rise-time requirements. Omitting pull-ups results in undefined HIGH states and logic failure.

Does 74HC05D,112 support mixed-voltage operation between inputs and outputs?

No. All inputs and outputs reference the same VCC pin. While the device can interface across voltage domains using external pull-ups (e.g., 3.3 V input driving 5 V bus), the internal logic and thresholds scale with VCC. VIH/VIL are percentages of VCC-not fixed voltages-so proper level translation requires external circuitry.

What is the maximum capacitive load the 74HC05D,112 can drive reliably?

At 4.5 V VCC and 25 °C, the device maintains ≤27 ns propagation delay with ≤50 pF total load (including PCB trace and probe capacitance). For loads >50 pF, rise time degrades linearly; design guidance recommends limiting total load to 100 pF with appropriate pull-up sizing (e.g., 2.2 kΩ for 100 pF yields ~250 ns rise time).