STMicroelectronics TL7702AID1013TRA

Overview

TL7702AID1013TRA from STMicroelectronics is a precision supply voltage supervisor IC designed for power-on reset generation in microprocessor systems. It features true and complement reset outputs (RESET high-active, RESET̅ low-active), 2.5 V threshold sensing with ±50 mV hysteresis, adjustable reset pulse width via external capacitor (tpo = 1.3×10⁴ × CT), and operates across 3.6 V to 18 V supply range. Used in industrial control units requiring reliable brownout detection and controlled system initialization.

For engineers reviewing the TL7702AID1013TRA datasheet, TL7702AID1013TRA pinout, TL7702AID1013TRA application, or TL7702AID1013TRA equivalent, key selection criteria include its fixed 2.5 V SENSE threshold, SO-8 package compatibility, –25°C to 85°C operating range, and externally programmable reset timeout-critical for deterministic boot sequencing in embedded controllers.

Technical Context

The TL7702A implements a precision bandgap-based voltage reference (2.53 V typ.) with temperature compensation to maintain stable threshold accuracy over –25°C to 85°C. Its internal comparator monitors the SENSE input against this reference, triggering reset assertion when supply drops below VT+ (2.53 V + 15 mV) and releasing only after crossing VT– (2.53 V – 15 mV), ensuring noise immunity.

Reset pulse width is fully determined by an external capacitor on CT (Pin 3), yielding tpo = 1.3×10⁴ × CT seconds; typical 0.1 µF yields 1.3 ms. REF (Pin 1) supplies a buffered 2.53 V reference requiring 0.1 µF decoupling to suppress transients affecting threshold stability.

Key Specifications

Pinout & Package

TL7702AID1013TRA is housed in an SO-8 (Small Outline, 8-pin) surface-mount package per JEDEC MS-012, with 1.27 mm pitch, 4.9 mm × 6.0 mm body, and 1.75 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12DBVR and MAX6816EUT+T, TL7702AID1013TRA uniquely delivers fixed 2.5 V threshold, true/complement outputs, REF buffer, and full timeout programmability-making it optimal for industrial 3.3 V/5 V dual-rail systems requiring design flexibility and noise resilience.

Availability

TL7702AID1013TRA is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical imaging subsystems, and energy meter data acquisition units requiring stable component supply across extended temperature ranges.

Supply support for TL7702AID1013TRA 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

TL7702AID1013TRA belongs to the TL7700A series of precision voltage supervisors, engineered specifically for deterministic power-on and brownout reset generation in microprocessor-based systems with unregulated or variable input supplies.

FAQ

What is the function of the REF pin (Pin 1) on TL7702AID1013TRA?

The REF pin provides a buffered, temperature-compensated 2.53 V reference output. It must be decoupled with a 0.1 µF capacitor to ground to suppress fast transients that could affect threshold accuracy. This output can also serve as a precision bias voltage for external comparators or ADC references in multi-rail systems.

Can TL7702AID1013TRA monitor a 5 V supply directly?

Yes. The SENSE pin accepts up to 6 V or Vs − 1 V (whichever is lower), making direct 5 V monitoring valid. With its 2.5 V threshold, it asserts reset when the 5 V rail drops below ~2.5 V - appropriate for detecting severe brownout but not minor dips; for tighter 5 V supervision, use external resistor divider to scale voltage to 2.5 V.

How is reset pulse width calculated for TL7702AID1013TRA?

Reset pulse width tpo is calculated as tpo = 1.3 × 10⁴ × CT seconds, where CT is the capacitor value in farads connected between Pin 3 (CT) and ground. For example, a 0.1 µF capacitor yields tpo = 1.3 ms. This linear relationship allows precise tailoring to MCU reset timing requirements without trimming resistors or firmware delays.

Does TL7702AID1013TRA have built-in hysteresis, and why does it matter?

Yes, it provides 15 mV typical hysteresis between VT+ and VT− thresholds. This prevents oscillatory reset behavior during slow or noisy supply recovery by requiring the supply to rise ~15 mV above the trip point before reset release - essential for stable operation in electrically harsh environments like motor drives or automotive power systems.