STMicroelectronics LM2901BYPT

Overview

LM2901BYPT from STMicroelectronics is an AEC-Q100 qualified automotive-grade quad low-power voltage comparator in TSSOP-14 package, operating from +2 V to +36 V single supply (or ±1 V to ±18 V dual supply), with 1 mA typical supply current, 20 nA typical input bias current, and 250 mV typical low output saturation voltage at 4 mA sink - deployed in automotive threshold detection and level-shifting circuits.

For engineers reviewing the LM2901BYPT datasheet, LM2901BYPT pinout, LM2901BYPT application, or LM2901BYPT equivalent, this device supports wide-voltage single-supply operation, rail-to-rail input common-mode range including negative rail, TTL/CMOS-compatible open-collector outputs, and robust ESD protection (1500 V CDM), making it suitable for harsh automotive environments requiring reliable analog signal conditioning.

Technical Context

The LM2901BYPT implements four independent PNP-input comparators with internal clamping diodes enabling input voltages exceeding the positive supply rail. Its input stage delivers stable bias current across supply voltage (2–36 V) and temperature (−40 °C to +125 °C), while maintaining <5 mV input offset voltage and <30 nA input offset current over full operating range.

Output stages feature open-collector NPN transistors capable of sinking up to 22 mA at 5 V and 13 mA at 36 V, with propagation delay as low as 0.9 µs (large-signal) and 1.0 µs (small-signal) under 5 mV overdrive - optimized for fast edge detection in sampling and zero-crossing applications.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9–5.1 mm × 6.2–6.6 mm footprint, 0.65 mm pitch, 1.2 mm height, wettable flank not applicable (TSSOP variant), JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DT and TLV3704IPWR, the LM2901BYPT uniquely combines AEC-Q100 Grade 1 qualification, 36 V operation, and sub-5 mV offset - making it the only option among the three qualified for direct integration into ASIL-B relevant vehicle subsystems.

Availability

LM2901BYPT is available at Aetrix Electronics and suitable for automotive battery management, motor control feedback, and cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2901BYPT 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, power management ICs, sensors, and analog components for automotive, industrial, and consumer markets.

The LM2901B product line delivers AEC-Q100 qualified, high-voltage quad comparators optimized for automotive signal conditioning - targeting body electronics, powertrain subsystems, and ADAS sensor interfaces where reliability and wide supply range are critical.

FAQ

What is the maximum input voltage the LM2901BYPT can tolerate relative to VCC+?

The LM2901BYPT supports absolute maximum input voltage of 40 V, which may exceed VCC+ (up to +36 V). This allows direct connection to unregulated battery rails or sensor outputs without external clamping - confirmed by Table 1 (V_in = −0.3 V to 40 V) and Figure 1 pinout labeling.

Does the LM2901BYPT require external pull-up resistors on its outputs?

Yes - all four outputs are open-collector NPN structures and require external pull-up resistors to define logic-high voltage levels. Typical values range from 2.2 kΩ (for 5 V logic) to 10 kΩ (for 36 V systems), selected based on sink current capability (8–22 mA) and rise time requirements.

Can the LM2901BYPT operate from a dual supply configuration?

Yes - the device supports ±1 V to ±18 V dual supplies, verified in Table 2 (Operating Conditions) and Features section. VCC+ and VCC− pins accept symmetric or asymmetric rails; input common-mode range remains referenced to VCC−, enabling true bipolar operation.

Is the LM2901BYPT pin-compatible with legacy LM2901 variants?

No - LM2901BYPT uses TSSOP-14 packaging with specific pin mapping (e.g., VCC− on Pin 4, VCC+ on Pin 11), differing from SO-14 (LM2901YDT) and QFN16 (LM2901YQ5T) variants. Mechanical and thermal characteristics differ; PCB layout must match TSSOP-14 footprint per Figure 15 and Table 5.