Texas Instruments LM2901QPWRQ1

Overview

LM2901QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified quad open-drain voltage comparator for automotive systems, operating from 2 V to 36 V supply, with ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay at 5 V. It serves in HEV/EV powertrain monitoring, body control module voltage supervision, and infotainment system level-shifting circuits.

For engineers reviewing the LM2901QPWRQ1 datasheet, LM2901QPWRQ1 pinout, LM2901QPWRQ1 application, or LM2901QPWRQ1 equivalent, key selection criteria include its 36 V max supply rating, –40°C to +125°C ambient operation, open-drain output compatibility with TTL/MOS/CMOS, low quiescent current (0.8–1.2 mA total), and automotive-grade ESD robustness (2 kV HBM).

Technical Context

The LM2901QPWRQ1 implements four independent PNP Darlington-pair input comparators, enabling high gain and fast response while maintaining ultra-low input bias current. Its input stage supports common-mode voltage down to ground and up to V_CC – 2 V over temperature, with differential input range extended to ±36 V.

Each comparator features an open-drain NPN output stage capable of sinking up to 25 mA, allowing flexible logic-level translation via external pull-up resistors. The device operates on single or dual supplies as long as |V₊ – V_–| remains within 2 V to 36 V and V_CC exceeds the input common-mode voltage by ≥1.5 V.

Key Specifications

Pinout & Package

TSSOP-14 package (4.40 mm × 5.00 mm), thermally enhanced with exposed pad connected to GND; compatible with automated optical inspection and reflow soldering in automotive PCB assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad open-drain comparator applications.

Compared with LM2901QPWRQ1, the LM2901QDRQ1 offers superior thermal dissipation in SOIC packaging for high-ambient applications, while the LM2901BQDBVRQ1 delivers 60% smaller footprint at the cost of higher junction-to-ambient resistance - both retain identical comparator performance and automotive qualification.

Availability

LM2901QPWRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and infotainment systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LM2901QPWRQ1 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The LM2901x-Q1 product line was designed specifically for automotive voltage supervision and signal conditioning, emphasizing AEC-Q100 qualification, wide supply range, and robust ESD performance in harsh environments.

FAQ

What is the maximum supply voltage rating for LM2901QPWRQ1?

The LM2901QPWRQ1 supports a maximum supply voltage of 36 V, verified per Absolute Maximum Ratings in the official datasheet (SLCS142H). This enables direct connection to 24 V commercial vehicle systems and 48 V mild-hybrid architectures without external regulation. Operation above 36 V risks permanent damage, and the device is not rated for sustained 42 V load-dump transients without external clamping.

Does LM2901QPWRQ1 support rail-to-rail input common-mode voltage?

The LM2901QPWRQ1 supports common-mode input voltage from ground (V–) up to V_CC – 2 V across –40°C to +125°C, as specified in Section 5.7. It does not support true rail-to-rail input (i.e., up to V_CC) - exceeding V_CC – 2 V may cause incorrect output states. However, one input can safely reach V_CC if the other remains within the valid range, enabling asymmetric signal comparisons.

Can LM2901QPWRQ1 outputs be wire-OR'd together?

Yes, LM2901QPWRQ1 outputs are open-drain and electrically compatible for wired-AND (wire-OR logic with active-low assertion). When multiple outputs share a single pull-up resistor, the combined node goes low if any comparator triggers - commonly used for aggregated fault signaling in automotive ECUs. Ensure total sink current remains ≤25 mA per output and total bus capacitance stays within propagation delay limits.

What is the typical input offset voltage of LM2901QPWRQ1 over temperature?

The LM2901QPWRQ1 has a typical input offset voltage of ±0.37 mV at 25°C and a maximum of ±5.5 mV across –40°C to +125°C, per Section 5.7 Electrical Characteristics. This tight offset enables accurate threshold detection in battery voltage monitors and sensor interfaces where <10 mV error is required. The offset drift vs. temperature is characterized in Figures 5-7 through 5-14 of the datasheet.

Is LM2901QPWRQ1 pin-compatible with legacy LM2901-Q1 variants?

Yes, LM2901QPWRQ1 is pin-compatible with all LM2901x-Q1 family members in TSSOP-14 packaging, including LM2901QDRQ1 (SOIC-14) and LM2901BQDBVRQ1 (SOT-23-14), as confirmed by identical pin functions in Table 4-1 and Figure 4-1. Channel numbering follows TI's convention (OUT1/OUT2 swapped vs. some competitors), but electrical behavior and connectivity are identical across the family.