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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

STMicroelectronics TL7702AID1/A

Name: TL7702AID1/A
Brand: STMicroelectronics
SKU: TL7702AID1/A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL7702AID1/A

Manufacturer:: STMicroelectronics

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TL7702AID1/A.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,870

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Product details

Overview

TL7702AID1/A from STMicroelectronics is a precision supply voltage supervisor IC designed for power-on and brown-out reset generation in microcontroller-based systems. It features a 2.5 V ±2% threshold voltage, true/complement RESET outputs (active-high and active-low), externally adjustable reset pulse width via capacitor on CT pin, and operates across 3.6 V to 18 V supply range. Used in industrial control modules where reliable cold-start and transient immunity are required.

For engineers reviewing the TL7702AID1/A datasheet, TL7702AID1/A pinout, TL7702AID1/A application, or TL7702AID1/A equivalent, key selection criteria include its fixed 2.5 V sensing threshold, dual-phase reset signaling, CT-timed delay (1.3×10⁴ × C_T seconds), temperature-compensated reference, and SO-8 package compatibility with legacy board layouts.

Technical Context

The TL7702AID1/A implements a precision bandgap-based voltage reference and comparator architecture with hysteresis (10–15 mV) on the SENSE input to prevent chatter during supply recovery. Its internal timing circuit relies entirely on an external capacitor at CT (Pin 3) to set reset pulse width - no internal RC oscillator is used.

It delivers complementary TTL-compatible outputs: RESET (active-high) and RESET (active-low), both specified for ±16 mA drive strength at V_S = 5 V. The REF output (Pin 1) provides a stable 2.53 V reference requiring a 0.1 µF bypass capacitor to suppress fast transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.6 V to 18 V - supports wide-input industrial and automotive power rails without external regulation
Threshold Voltage (SENSE)	2.48 V to 2.58 V at 25°C - fixed 2.5 V nominal with ±2% tolerance ensures consistent MCU reset point
Reset Pulse Width	tpo = 1.3×10⁴ × C_T seconds - user-selectable delay (e.g., 1.3 ms with 0.1 µF) meets diverse processor initialization timing
Reference Output (REF)	2.53 V ±0.05 V - low-drift, temperature-compensated voltage source for external monitoring or calibration
Hysteresis (VT+ − VT−)	10 mV to 15 mV - prevents false resets during slow or noisy supply recovery
Operating Temperature	−25°C to +85°C - qualified for extended industrial environments without derating

Pinout & Package

TL7702AID1/A is housed in an SO-8 (Small Outline, 8-pin) surface-mount package with standard 1.27 mm pitch, JEDEC MS-012AC compliant footprint, and plastic body measuring 4.9 mm × 6.0 mm × 1.75 mm.

Pin/Terminal	Circuit Role	Design Meaning
1 (REF)	Reference Voltage Output	Stable 2.53 V source requiring 0.1 µF decoupling to ground for noise immunity
2 (GND)	Ground Reference	System return path for all internal circuits and output drivers
3 (CT)	Timing Capacitor Input	Connects external capacitor to set reset pulse duration; open-circuit disables timing
4 (RESET)	Active-High Reset Output	Drives high during fault; sinks up to 16 mA when active-low state ends
5 (SENSE)	Supply Monitoring Input	Compares V_SENSE against internal 2.5 V reference; must not exceed V_S − 1 V or 6 V
6 (V_S)	Supply Voltage Input	Primary power rail input; powers internal circuitry and defines reset threshold scaling
7 (RESET)	Active-Low Reset Output	Complementary to Pin 4; drives low during fault; sources up to 16 mA when inactive
8 (RESIN)	External Reset Input	Active-low manual reset trigger; forces reset regardless of supply condition

Key Features

Feature	Design Value
True and Complement Reset Outputs	Simultaneous active-high (Pin 4) and active-low (Pin 7) signals eliminate need for external inverters in mixed-logic systems
Externally Adjustable Reset Delay	Capacitor-programmable pulse width (1.3×10⁴ × C_T) enables precise matching to processor startup requirements
Precision Temperature-Compensated Reference	2.53 V ±0.05 V reference (Pin 1) supports accurate external voltage monitoring without additional ICs
Wide Supply Range with Low Quiescent Current	Operates from 3.6 V to 18 V while drawing only 1.8–3.3 mA, reducing system power overhead

Applications

Industrial PLC I/O Modules

Automotive Body Control Units

Use Scenario: Power sequencing during ignition cycle and battery voltage fluctuations.

IC Role / Device Role / Timing Role: Monitors 12 V rail and asserts dual-phase reset to ensure microcontroller and CAN transceiver initialize synchronously.

Use Value: Prevents firmware lockup during cranking (6–9 V dips) using 10–15 mV hysteresis and 2.5 V threshold aligned with MCU V_DD min spec.

Use Scenario: Cold-start operation under low-battery conditions (<8 V) with rapid load dump transients.

IC Role / Device Role / Timing Role: Generates guaranteed minimum 1.3 ms reset pulse (with 0.1 µF CT) to satisfy Infineon AURIX™ startup timing.

Use Value: REF output feeds ADC reference channel for battery voltage telemetry, eliminating separate voltage reference IC.

Point-of-Sale Terminal Power Management

Energy Meter Microcontroller Supervision

Use Scenario: AC/DC adapter brown-out events causing intermittent communication loss.

IC Role / Device Role / Timing Role: Detects <2.5 V drop on 5 V logic rail and holds RESET until stable, preventing EEPROM corruption.

Use Value: RESIN pin allows integration with mechanical power switch for manual reset, supporting field serviceability.

Use Scenario: Long-term deployment in unattended metering cabinets with wide ambient temperature swings.

IC Role / Device Role / Timing Role: Provides −25°C to +85°C guaranteed reset behavior using internal temperature-compensated reference.

Use Value: Eliminates need for external hysteresis resistors or trimming components, reducing BOM count and calibration steps.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3823-25DBVR	Fixed 2.5 V threshold, internal 200 ms delay, no CT pin or REF output	Lacks programmable timing and reference output; suited for simpler, cost-sensitive designs	Select if timing is fixed and reference function is unnecessary
MAX691CPD+	5 V supply only, includes watchdog timer and manual reset, 2.63 V threshold	Requires 5 V rail; adds watchdog functionality but incompatible with 12 V/18 V systems	Select only for 5 V-only systems needing watchdog capability

Compared with TPS3823-25DBVR and MAX691CPD+, TL7702AID1/A uniquely supports wide-input voltage operation (3.6–18 V), offers user-adjustable reset timing, and provides a buffered reference output - making it suitable for flexible, multi-rail industrial designs where timing and monitoring coexist.

Availability

TL7702AID1/A is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and energy meter microcontroller supervision requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TL7702AID1/A 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, specializing in microcontrollers, power management, analog ICs, and automotive-grade silicon.

The TL7700A series belongs to ST's legacy analog supervisor product line, engineered specifically for robust, low-cost reset control in microprocessor and microcontroller systems operating under variable or noisy supply conditions.

FAQ

What is the maximum allowable voltage on the SENSE pin for TL7702AID1/A?

The SENSE pin voltage must not exceed the lesser of V_S − 1 V or 6 V, per datasheet Note 3. For example, at V_S = 12 V, max SENSE = 11 V; at V_S = 5 V, max SENSE = 6 V. Exceeding this limit risks latch-up or permanent damage due to internal ESD structure limitations.

Can TL7702AID1/A be used with a 3.3 V microcontroller system?

Yes - though its 2.5 V threshold is below 3.3 V, it remains valid for monitoring the 3.3 V rail directly. The device operates down to 3.6 V supply, so a 3.3 V system requires either a ≥3.6 V auxiliary rail or use of the SENSE pin tied to a resistor divider from the 3.3 V rail to meet the 2.5 V trip point.

Is the REF output buffered, and can it drive an ADC reference input?

Yes, the REF output is internally buffered and specified for ±50 µA load current. It maintains 2.53 V ±0.05 V over temperature and supply variation, making it suitable for driving mid-resolution (12-bit) SAR ADC references directly - provided the ADC's reference input impedance exceeds 50 kΩ and layout includes local 0.1 µF decoupling.

Does TL7702AID1/A require external pull-up resistors on RESET outputs?

No - both RESET (Pin 4) and RESET (Pin 7) are push-pull outputs capable of sourcing/sinking ±16 mA. Pull-up resistors are unnecessary unless interfacing with open-collector logic or level-shifting circuits; standard CMOS/TTL loads connect directly.

TL7702AID1/A Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.53V

Output:: Open Drain or Open Collector

Reset:: Active High/Active Low

Reset Timeout:: 1µs Maximum Propagation Delay

Operating Temperature:: -25°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TL7702AID1/A FAQ

1.How can I place an order for TL7702AID1/A through Aetrix?

Please submit a Request for Quotation (RFQ) for TL7702AID1/A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TL7702AID1/A reliable?

The price and inventory of TL7702AID1/A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7702AID1/A is usually 5 days.

3.What payment methods are accepted for TL7702AID1/A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7702AID1/A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL7702AID1/A?

TL7702AID1/A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL7702AID1/A order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TL7702AID1/A?

For technical support, including TL7702AID1/A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7702AID1/A requirements.

6.How does Aetrix verify that TL7702AID1/A is sourced from the original manufacturer or authorized distributors?

All TL7702AID1/A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL7702AID1/A meets industry standards.

7.What is the process for return or replacement of TL7702AID1/A?

All TL7702AID1/A units undergo pre-shipment inspection (PSI). If there is an issue with TL7702AID1/A, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TL7702AID1/A part is unused and in its original packaging.

Return procedure for TL7702AID1/A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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