Texas Instruments TLV1864PWR

Overview

TLV1864PWR from Texas Instruments is a quad-channel, nanopower open-drain comparator with 440 nA per channel supply current, 1.8 V to 40 V supply range, and over-the-rail input capability up to 40 V above V−. It features fail-safe inputs, power-on reset, and reverse battery protection-enabling reliable voltage monitoring in always-on battery-powered systems such as gas detectors and motion sensors.

For engineers reviewing the TLV1864PWR datasheet, TLV1864PWR pinout, TLV1864PWR application, or TLV1864PWR equivalent, key selection considerations include its open-drain output for level translation, -40°C to +125°C operation, 2.8 mV typical hysteresis, and TSSOP-14 package compatibility with space-constrained industrial and portable designs.

Technical Context

The TLV1864PWR implements a fail-safe input stage with ESD clamps and snapback protection, allowing inputs to operate from –0.1 V to 40 V relative to V− independent of V+. Its internal power-on reset circuit holds outputs in a known state until supply exceeds 1.5 V, preventing false triggering during brownout or startup.

As a member of the TLV186x series, it uses an open-drain output architecture enabling logic-level translation across domains (e.g., 3.3 V comparator supply driving a 12 V pull-up), OR-wiring of multiple comparators, and compatibility with external pull-up voltages up to 40 V-without requiring additional level-shifting circuitry.

Key Specifications

Pinout & Package

TSSOP-14 package (4.40 mm × 5.00 mm body size), thermally enhanced for low-power operation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1864IPWR, TLV1864PWR offers identical performance and qualification - differing only in part-number suffix convention. Against TLV1862PWR, TLV1864PWR provides double the channel density in a larger TSSOP-14 package, reducing component count where four independent thresholds are required.

Availability

TLV1864PWR is available at Aetrix Electronics and suitable for gas detection systems, smart motion sensors, industrial smoke/heat detectors, and portable gas meters requiring stable component supply, long-term lifecycle support, and guaranteed nanopower performance.

Supply support for TLV1864PWR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV186x product line was designed specifically for ultra-low-power, high-voltage threshold detection in always-on sensing applications - emphasizing fail-safe inputs, wide supply tolerance, and open-drain flexibility for system-level integration.

FAQ

What is the maximum input voltage the TLV1864PWR can tolerate relative to V−?

The TLV1864PWR supports an input common-mode voltage range from –0.1 V to 40 V relative to V−, independent of the V+ supply voltage. This over-the-rail capability allows direct sensing of signals exceeding V+, such as monitoring a 36 V battery while operating from a 3.3 V rail - without external attenuators or level shifters. The input stage includes ESD clamps and fail-safe biasing to maintain integrity across this full range.

Does the TLV1864PWR require external hysteresis for stable operation?

No, the TLV1864PWR includes 2.8 mV typical internal hysteresis, which is factory-trimmed and temperature-stable. This built-in hysteresis suppresses noise-induced oscillation at the decision threshold - eliminating the need for external positive feedback resistors in most voltage-monitoring and sensor-comparison applications. External hysteresis is only required if a larger trip window (>5 mV) is needed for specific noise immunity requirements.

Can unused comparator channels on the TLV1864PWR be left floating?

No - unused inputs must not be left floating or tied together. Doing so may cause high-frequency oscillation due to the device's low offset and high bandwidth. Instead, each unused input pair should be biased with ≥50 mV differential voltage within the –0.1 V to 40 V common-mode range - for example, grounding INx− and connecting INx+ to V+ or a stable reference. All four outputs (OUT1–OUT4) may be left unconnected if unused.

What is the purpose of the Power-On Reset (POR) circuit in the TLV1864PWR?

The POR circuit in the TLV1864PWR holds all outputs in a defined logic state (high-impedance for open-drain) until the supply voltage V+ rises above 1.5 V. This prevents false triggering during power-up, brownout, or battery insertion - critical for safety-critical applications like smoke detectors or gas alarms. Once V+ exceeds VPOR, outputs begin responding to input conditions only after a 3 ms stabilization delay (TON), ensuring clean startup behavior.

How does the open-drain output of the TLV1864PWR support level translation?

The TLV1864PWR's open-drain outputs can be pulled up to any voltage from 0 V to 40 V - independent of the comparator's own V+ supply. For example, with V+ = 1.8 V, OUTx can drive a 5 V or 12 V logic bus by connecting the pull-up resistor to that higher rail. This enables seamless interfacing between low-voltage microcontrollers and higher-voltage peripherals, eliminates level-shifter ICs, and supports wired-OR configurations for alarm consolidation across multiple sensors.