Texas Instruments TLV3492AIDCNT

Overview

TLV3492AIDCNT from Texas Instruments is a dual, nanopower, rail-to-rail input/output comparator with push-pull CMOS output stage, operating from 1.8 V to 5.5 V supply, consuming only 0.8 µA typical quiescent current per channel, and delivering 6 µs propagation delay at 100 mV overdrive - ideal for battery-powered medical sensors and ultra-low-power wake-up detection circuits.

For engineers reviewing the TLV3492AIDCNT datasheet, TLV3492AIDCNT pinout, TLV3492AIDCNT application, or TLV3492AIDCNT equivalent, key selection criteria include its sub-1-µA per-channel supply current, rail-to-rail input beyond supply rails (±200 mV), push-pull output eliminating external pull-up, 8-pin SOT-23 package footprint, and guaranteed operation across –40°C to +125°C industrial temperature range.

Technical Context

The TLV3492AIDCNT integrates two independent high-precision comparators sharing a common V+ and V– supply, each featuring ESD-protected inputs with ±3000-V HBM rating and internal electrostatic protection diodes enabling ±500-mV input overvoltage tolerance when series current is limited to 10 mA. Its push-pull output stage eliminates shoot-through current and supports direct interfacing with CMOS logic without external pull resistors.

Designed for single-supply systems down to 1.8 V, the device achieves rail-to-rail input common-mode range extending 200 mV beyond both supply rails and delivers consistent 6 µs propagation delay across 1.8 V–5.5 V supply and –40°C to +125°C ambient, with input offset voltage tightly specified at ±15 mV max and temperature drift of ±12 µV/°C.

Key Specifications

Pinout & Package

TLV3492AIDCNT is housed in an 8-pin SOT-23 package (2.90 mm × 1.63 mm body size), optimized for space-constrained portable designs and offering thermal resistance R_θJA = 135.4°C/W for efficient power dissipation in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3492AIDCNT, TLV3492IDCNT offers identical performance in all key parameters and requires no design changes, while LP311DR trades nanopower operation for higher voltage capability and speed - making it unsuitable for battery-critical applications where TLV3492AIDCNT excels.

Availability

TLV3492AIDCNT is available at Aetrix Electronics and suitable for portable medical equipment, wireless security peripherals, handheld instruments, ultra-low-power system supervision, and battery-backed industrial monitoring requiring stable component supply across long production lifecycles.

Supply support for TLV3492AIDCNT 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 designing analog and embedded processing solutions, with leadership in low-power signal chain and power management technologies.

The TLV349x product line was developed specifically for nanopower, rail-to-rail comparators targeting battery-operated and energy-constrained applications - emphasizing sub-1-µA operation, wide supply range, and robust input protection.

FAQ

What is the maximum supply voltage rating for TLV3492AIDCNT?

The TLV3492AIDCNT has an absolute maximum supply voltage rating of 5.5 V across V+ to V–. Exceeding this value may cause permanent damage. The recommended operating supply range is 1.8 V to 5.5 V, and the device maintains full specification compliance - including propagation delay, offset voltage, and input common-mode range - across this entire range. Always observe derating guidelines for thermal management at elevated voltages.

Does TLV3492AIDCNT support rail-to-rail input, and how far beyond the rails does it extend?

Yes, TLV3492AIDCNT supports rail-to-rail input with common-mode voltage range extending 200 mV beyond both supply rails: from (V–) – 0.2 V to (V+) + 0.2 V. This capability enables accurate sensing of signals below ground or above V+ in single-supply systems - critical for applications like zero-crossing detection, battery voltage monitoring, and sensor signal conditioning where input biasing is impractical.

Can TLV3492AIDCNT drive a 10-kΩ load directly, and what are the output voltage limits?

Yes, TLV3492AIDCNT can directly drive a 10-kΩ load. With 5-V supply and 5-mA output current, VOH is 90–200 mV below V+, and VOL is 160–200 mV above V–. At lighter loads (<1 mA), output swing approaches true rail-to-rail. Its push-pull CMOS output eliminates need for external pull-up resistors, simplifying interface to 1.8-V or 3.3-V microcontrollers and reducing static power consumption in always-on configurations.

Is external hysteresis required when using TLV3492AIDCNT with noisy input signals?

Yes, external hysteresis is strongly recommended for noisy inputs. TLV3492AIDCNT has no internal hysteresis; its input offset voltage is ±15 mV max, meaning noise within this band causes multiple output transitions. Adding positive feedback (e.g., 560-kΩ resistor from OUT to +IN) creates controlled hysteresis - typically 10–50 mV - to suppress chatter. Figure 17 in the SBOS262E datasheet provides verified hysteresis calculation and layout guidance for TLV3492AIDCNT.

What is the thermal resistance (RθJA) of TLV3492AIDCNT in its SOT-23 package?

The junction-to-ambient thermal resistance (RθJA) for TLV3492AIDCNT in the 8-pin SOT-23 (DCN) package is 135.4°C/W, as specified in Section 7.5 of the SBOS262E datasheet. This value assumes standard JEDEC 2-layer board conditions. Actual thermal performance improves with PCB copper area, thermal vias, and proper decoupling - critical for sustained operation near maximum ambient temperature (125°C) or under transient load conditions.