Texas Instruments TLC7725QP

Overview

TLC7725QP from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.25 V sense threshold, operating from 2 V to 6 V supply, delivering ≤16 µA quiescent current and supporting –40°C to 125°C industrial temperature range in DRB package. It provides power-on reset generation, automatic undervoltage reset with programmable delay via external capacitor, and power-down control for static RAM with battery backup - used in medical imaging systems requiring high-reliability voltage monitoring.

For engineers reviewing the TLC7725QP datasheet, TLC7725QP pinout, TLC7725QP application, or TLC7725QP equivalent, this page delivers verified technical context, exact DRB-package pin functions, real-world timing behavior (td = 2.1×10⁴ × CT), RESET/RESET dual-output logic states per control inputs, and validated alternatives for voltage supervisor replacement in harsh-temperature embedded designs.

Technical Context

The TLC7725QP implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 2.25 V (±3%) threshold detection across –40°C to 125°C. Its internal timer generates a user-programmable reset delay (td) determined solely by external capacitor CT: td = 2.1 × 10⁴ × CT (seconds, CT in farads).

It features dual active-high/active-low RESET outputs, CONTROL input enabling RAM power-down mode, RESIN input for manual reset override, and SENSE input monitoring supply rail or regulated voltage. Output drive capability is ±2 mA at VOH ≥ VDD – 0.5 V and VOL ≤ 0.5 V under load.

Key Specifications

Pinout & Package

Package: 3 mm × 3 mm, 8-pin SON (DRB), moisture-sensitive level 1, RoHS-compliant, non-magnetic option available for MRI-compatible medical imaging systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7725QP, TPS3808G25DBVR offers lower quiescent current but forfeits programmable timing and SRAM power-down support; MAX6326UT23D3+T provides tighter threshold tolerance (±1.5%) yet lacks dual outputs and control flexibility - making TLC7725QP uniquely suited for industrial systems requiring configurable reset behavior and hardware-level memory protection.

Availability

TLC7725QP is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial motor drives, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC7725QP 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 specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and industrial-grade ICs.

The TLC77xx family was designed specifically for robust voltage supervision in mission-critical embedded systems - emphasizing micropower operation, wide temperature resilience, and hardware-controlled power-down for battery-backed memory.

FAQ

What is the exact sense threshold voltage of the TLC7725QP?

The TLC7725QP has a fixed negative-going input threshold voltage (VIT–) of 2.25 V, with typical tolerance of ±3% over the full –40°C to 125°C operating range. This value is factory-trimmed and does not require external resistor networks - unlike the TLC7701, which supports adjustable thresholds. Electrical characteristics confirm min/max values of 2.18 V and 2.32 V respectively at VDD = 2 V to 6 V.

How is the reset delay time calculated for the TLC7725QP?

The reset delay time (td) for the TLC7725QP is calculated using the formula td = 2.1 × 10⁴ × CT, where CT is the external capacitor value in farads. For example, a 100 nF capacitor yields td ≈ 2.1 ms. This delay begins after SENSE voltage rises above the 2.25 V threshold and ensures the system remains held in reset long enough for stable clock and supply settling before release.

Does the TLC7725QP support battery-backed SRAM power-down functionality?

Yes, the TLC7725QP supports battery-backed SRAM power-down via its CONTROL pin. When CONTROL is tied to GND, the RESET output becomes active-high and can directly drive the chip select (CS) line of static RAM. During main supply failure, the TLC7725QP asserts RESET, disabling memory access while battery power maintains data retention - a feature confirmed in the functional description and Figure 10 of the SLVS087M datasheet.

What package type and pin count does the TLC7725QP use?

The TLC7725QP uses the DRB package: an 8-pin, 3 mm × 3 mm SON (Small Outline No-lead) package with exposed thermal pad. It is RoHS-compliant, moisture-sensitive level 1, and rated for operation from –40°C to +125°C. Pinout matches TI's standardized DRB layout for the TLC77xx family, with NC on pin 8 and dual RESET outputs on pins 6 and 7.

Can the TLC7725QP operate reliably below 2 V supply voltage?

The TLC7725QP is specified to assert RESET down to VDD = 1 V, ensuring fail-safe behavior during brown-in events. However, its recommended operating supply range is 2 V to 6 V. Below 2 V, while RESET remains active, other parameters - including threshold accuracy, delay timing, and output drive - are not guaranteed per datasheet specifications. System design should ensure VDD stabilizes within spec before releasing reset.