STMicroelectronics LM2901HYDT

Overview

LM2901HYDT from STMicroelectronics is a high-temperature, low-power quad voltage comparator in SO-14 package, rated for -40°C to +150°C operation. It operates from single supply (2 V to 36 V) or dual supplies (±1 V to ±18 V), features 1.1 mA total supply current, 25 nA typical input bias current, and input common-mode range including ground - enabling direct sensing of signals referenced to system ground in automotive and industrial control systems.

For engineers reviewing the LM2901HYDT datasheet, LM2901HYDT pinout, LM2901HYDT application, or LM2901HYDT equivalent, key selection considerations include its AEC-Q100 qualified automotive grade rating, rail-to-rail differential input capability, TTL/CMOS-compatible open-collector outputs, low output saturation voltage (250 mV @ 4 mA), and guaranteed performance across extreme temperature ranges without external biasing.

Technical Context

The LM2901HYDT integrates four independent PNP-input comparators with matched internal current sources and active pull-down output stages. Its input stage allows common-mode voltages down to –0.3 V (even with single-supply operation), while supporting differential inputs up to ±36 V - critical for robust overvoltage-tolerant sensing in battery monitoring and motor control feedback loops.

Each comparator delivers 1.3 µs small-signal response time (RL = 5.1 kΩ to VCC+) and maintains stable propagation delay across temperature (–40°C to +150°C), with output sink current up to 16 mA and low-level output voltage as low as 250 mV at 4 mA load - ensuring reliable interfacing with legacy logic families and microcontroller GPIOs.

Key Specifications

Pinout & Package

LM2901HYDT is housed in a 14-lead SOIC (SO-14) package per JEDEC MS-012, with body dimensions 8.75 mm × 6.2 mm × 1.75 mm (max height), gull-wing leads, and ECOPACK®-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad voltage comparator applications.

Compared with LM2901QDR and TLV3704IPW, the LM2901HYDT uniquely combines AEC-Q100 Grade 0 qualification, ±36 V differential input tolerance, and ground-sensing capability - making it the sole option for high-reliability, high-voltage, high-temperature comparator functions in powertrain and chassis control units.

Availability

LM2901HYDT is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drives, and high-temperature battery management systems requiring stable component supply across extended lifecycle commitments.

Supply support for LM2901HYDT 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, Switzerland, designing and manufacturing microcontrollers, analog ICs, power devices, and sensors for automotive, industrial, and consumer markets.

The LM2901H series was developed specifically for high-reliability automotive and industrial comparator applications demanding extended temperature operation, high-voltage robustness, and ground-referenced sensing - addressing critical gaps in legacy comparator offerings.

FAQ

Is LM2901HYDT pin-compatible with standard LM2901 variants?

Yes, LM2901HYDT uses the industry-standard SO-14 pinout defined in the LM2901 family datasheet. Pin assignments for inputs, outputs, and supplies match LM2901D, LM2901DT, and LM2901PT - enabling drop-in replacement in existing designs where automotive-grade temperature and qualification are required.

Can LM2901HYDT operate with a single 3.3 V supply?

Yes, LM2901HYDT supports single-supply operation from +2 V to +36 V. At +3.3 V, it delivers 1.1 mA total supply current, 250 mV typical output saturation voltage at 4 mA sink, and maintains full functionality across –40°C to +150°C - making it suitable for low-voltage automotive infotainment and body control modules.

Does LM2901HYDT require external pull-up resistors on its outputs?

Yes, all four outputs are open-collector and require external pull-up resistors to VCC or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on speed and load requirements. No internal pull-ups are present - this architecture enables wired-OR logic and mixed-voltage interfacing.

What is the maximum sink current per output of LM2901HYDT?

The absolute maximum sink current per output is 20 mA, but the datasheet specifies 16 mA as the guaranteed minimum output sink current at VO = 1.5 V and Tamb = –40°C to +150°C. For continuous operation, ST recommends limiting sustained current to ≤10 mA to maintain thermal reliability in high-ambient conditions.