STMicroelectronics MC33174N

Overview

MC33174N from STMicroelectronics is a quad bipolar operational amplifier optimized for low-power, rail-to-rail input (V_ICM extends to V_CC−) and wide single/dual supply operation (+4V to +44V or ±2V to ±22V), delivering 2.1 MHz gain-bandwidth, 2 V/µs slew rate, and 200 µA typical supply current per amplifier. It is used in industrial sensor signal conditioning where supply headroom is constrained and input common-mode range must include ground.

For engineers reviewing the MC33174N datasheet, MC33174N pinout, MC33174N application, or MC33174N equivalent, key selection criteria include input common-mode range down to V_CC−, output swing within 100 mV of V_CC−, 120 dB channel separation, and compatibility with legacy DIP-14 quad op-amp footprints in space-constrained analog front-ends.

Technical Context

The MC33174N implements a fully complementary bipolar input stage enabling rail-to-rail input common-mode range (V_ICM = V_CC− to V_CC+ − 1.8 V) and supports true single-supply operation from +4 V. Its internal compensation ensures unity-gain stability with 45° phase margin at 100 pF load.

Each of the four amplifiers features independent biasing with matched input offset voltage drift (10 µV/°C) and low input bias current (20–100 nA), making it suitable for high-impedance transducer interfaces where DC accuracy and thermal stability are critical across −40°C to +105°C.

Key Specifications

Pinout & Package

MC33174N is housed in a 14-pin plastic dual in-line package (DIP-14) with 2.54 mm lead pitch, compliant with JEDEC MS-001. Pin 1 is marked by a notch or dot; top-view pin numbering follows standard counter-clockwise layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Compared with LM324N and TL074CN, MC33174N uniquely combines industrial temperature rating, rail-to-rail input capability at low supply current, and wide supply flexibility - making it the only option among the three qualified for 4–44 V single-supply industrial sensor nodes operating continuously at 105°C.

Availability

MC33174N is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, multi-channel data acquisition front-ends, and single-supply battery-powered instrumentation requiring stable component supply across extended temperature and voltage ranges.

Supply support for MC33174N 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, analog components, and MEMS sensors for industrial, automotive, and consumer markets.

The MC3x174 series was developed specifically for industrial analog signal chains requiring low power, wide supply tolerance, and guaranteed performance from −40°C to +105°C in harsh environments.

FAQ

Is MC33174N pin-compatible with standard DIP-14 quad op-amps like LM324?

Yes, MC33174N uses the industry-standard 14-pin DIP footprint and pinout: Pins 1–3 (Amp A), 5–7 (Amp B), 8–10 (Amp C), 12–14 (Amp D), with V_CC− on Pin 4 and V_CC+ on Pin 11. This allows direct replacement in existing LM324-based PCBs without layout changes.

Can MC33174N operate from a single 5 V supply with input signals at 0 V?

Yes. Its input common-mode range extends to V_CC− (0 V in single 5 V supply), and output can swing within 100 mV of V_CC−. With V_CC+ = 5 V and V_CC− = 0 V, it fully supports ground-referenced sensor inputs and rail-to-rail output capability.

What is the maximum capacitive load MC33174N can drive without oscillation?

The MC33174N is unity-gain stable with up to 100 pF capacitive load, as verified by 45° phase margin in the datasheet. For loads >100 pF, an isolation resistor (≥100 Ω) must be placed in series with the output to maintain stability.

Does MC33174N have ESD protection on its inputs?

Yes. The device incorporates internal ESD protection diodes on all input pins rated to ±2 kV HBM (Human Body Model), as confirmed in STMicroelectronics' reliability report AN2871, enabling robust handling in assembly and field environments without external clamping.