Texas Instruments TLV1824QPWRQ1

Overview

TLV1824QPWRQ1 from Texas Instruments is an automotive-grade quad-channel voltage comparator with open-drain output, rail-to-rail input (–0.2 V to V+ + 0.2 V), 40 V supply range (2.4 V to 40 V), 5 µA per channel quiescent current, and 420 ns typical propagation delay at 12 V. It is used in body control modules for window lift detection and battery monitoring circuits requiring high-voltage tolerance and low-power wake-up sensing.

For engineers reviewing the TLV1824QPWRQ1 datasheet, TLV1824QPWRQ1 pinout, TLV1824QPWRQ1 application, or TLV1824QPWRQ1 equivalent, this page delivers verified electrical specs, AEC-Q100 Grade 1 qualification details (–40°C to 125°C), open-drain output behavior up to 40 V pull-up, Power-On Reset functionality, and real-world automotive use context - all confirmed against TI's official SNOSDC9D datasheet.

Technical Context

The TLV1824QPWRQ1 implements a rail-to-rail input stage with internal ESD clamps referenced to V− and a soft upper clamp to V+ (5 kΩ effective resistance), enabling operation across its full 2.4 V–40 V supply range without phase inversion. Its open-drain output supports independent pull-up voltages up to 40 V, decoupled from the comparator's own V+ supply.

Each channel integrates a dedicated Power-On Reset (POR) circuit that holds the output in a known state until V+ reaches ≥1.7 V, preventing false triggering during system power-up/down transients. Input offset voltage is ±0.5 mV (typ), with drift of ±1.2 µV/°C over –40°C to +125°C.

Key Specifications

Pinout & Package

TSSOP-14 package (4.40 mm × 5.00 mm nominal body size) with exposed thermal pad connected directly to V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1824QPWRQ1, TLV1824IPWR lacks automotive qualification and thermal screening, while LM339QDRQ1 trades 3× slower response and 100× higher current for broader legacy compatibility - making TLV1824QPWRQ1 the optimal choice for new AEC-Q100-compliant, low-power, high-speed automotive sensing.

Availability

TLV1824QPWRQ1 is available at Aetrix Electronics and suitable for HEV/EV powertrain monitoring, infotainment system voltage supervision, and body control module design requiring stable component supply across automotive production lifecycles.

Supply support for TLV1824QPWRQ1 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 leader specializing in analog and embedded processing technologies, with deep expertise in automotive electronics and functional safety design.

The TLV18xx-Q1 product line was developed specifically for AEC-Q100-compliant automotive subsystems requiring ultra-low power, wide supply range, and robust ESD/EMI performance - targeting body electronics, powertrain, and charging infrastructure applications.

FAQ

What is the maximum allowable pull-up voltage on the TLV1824QPWRQ1 open-drain outputs?

The TLV1824QPWRQ1 open-drain outputs support pull-up voltages up to 40 V, independent of the device's own V+ supply voltage. This allows interfacing with higher-voltage domains such as 24 V CAN transceiver enable lines or 36 V auxiliary systems without level shifters. The absolute maximum rating for output voltage relative to V− is 42 V, so 40 V pull-up remains within safe operating limits per TI's SNOSDC9D datasheet Section 5.1.

Does TLV1824QPWRQ1 include Power-On Reset, and how does it behave during power-down?

Yes, TLV1824QPWRQ1 includes an integrated Power-On Reset (POR) circuit that holds all outputs in a known state (high-impedance for open-drain) until V+ rises above 1.7 V. During power-down, the POR similarly asserts until V+ falls below 1.7 V, preventing false transitions. This behavior is confirmed in Section 7.4.3 and Table 5.3 of the official datasheet, ensuring deterministic startup and shutdown in automotive ECUs.

Can unused comparator inputs on TLV1824QPWRQ1 be left floating?

No - unused inputs on TLV1824QPWRQ1 must not be left floating. Due to its high bandwidth and low offset, floating inputs cause high-frequency chatter from internal noise. Per Section 7.4.1.3, each unused input pair must be biased with ≥50 mV differential voltage within the rail-to-rail range (e.g., INx+ tied to V+, INx− tied to V−), or one input grounded and the other connected to a stable reference.

What is the thermal pad connection requirement for TLV1824QPWRQ1 in TSSOP-14 package?

The exposed thermal pad on the TLV1824QPWRQ1 TSSOP-14 package must be soldered directly to the V− (ground) net on the PCB. This is mandatory for thermal reliability, EMI suppression, and meeting the RθJB specification of 67.2°C/W (Table 5.6). Leaving the pad unconnected or connecting it to another net violates TI's mechanical recommendations and risks junction overheating under sustained 40 V operation.

How does TLV1824QPWRQ1 differ from TLV1814QPWRQ1 in output architecture and system impact?

TLV1824QPWRQ1 features open-drain outputs (sink-only), requiring external pull-up resistors and enabling wired-OR logic and voltage-level translation up to 40 V. TLV1814QPWRQ1 uses push-pull outputs (sink-and-source), eliminating pull-ups but prohibiting direct output tying. This makes TLV1824QPWRQ1 ideal for fault-bus architectures in BCMs, while TLV1814QPWRQ1 suits direct LED/MOSFET driving where bidirectional drive is needed.