Texas Instruments TL7702BID

Overview

TL7702BID from Texas Instruments is a precision supply-voltage supervisor IC designed as a reset controller for microcomputer and microprocessor systems. It monitors the SENSE input for undervoltage conditions, provides true and complement reset outputs (RESET and RESET), features a 2.53 V ±25 mV temperature-compensated reference voltage, and supports adjustable reset pulse duration via external CT capacitor. It operates across –40°C to 85°C and is used in industrial embedded controllers requiring reliable power-on and fault-triggered reset.

For engineers reviewing the TL7702BID datasheet, TL7702BID pinout, TL7702BID application, or TL7702BID equivalent, this page delivers verified electrical characteristics, thermal behavior, timing parameters, SOIC-8 package details, and real-world implementation guidance - all specific to the TL7702BID variant with –40°C to 85°C industrial temperature rating.

Technical Context

The TL7702BID implements a dual-comparator architecture with precision voltage sensing at the SENSE pin and an internal 2.53 V reference (VREF) routed to REF pin. Its reset logic responds to both power-up events (RESET active below ~1 V VCC) and dynamic undervoltage faults (VSENSE < 2.53 V), with hysteresis of 10 mV to prevent chatter.

Reset pulse duration is externally programmable via CT pin using td ≈ 2.6 × 10⁴ × CT (seconds), enabling design-specific assertion times. The RESIN pin allows manual reset override, forcing RESET high and RESET low independently of SENSE voltage - critical for system-level diagnostics and forced recovery sequences.

Key Specifications

Pinout & Package

TL7702BID is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, rated for surface-mount reflow (MSL Level-1, 260°C peak).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supply-voltage supervision applications.

Compared with TL7702BID, TPS3808G12DBVR offers tighter threshold accuracy but sacrifices programmability and dual-output capability, while MAX6326UT29D3+ provides push-pull drive but removes the precision reference and adjustable timing - making TL7702BID uniquely suited for designs requiring 2.53 V supervision, REF utilization, and custom reset duration.

Availability

TL7702BID is available at Aetrix Electronics and suitable for industrial automation, building management systems, and networked sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL7702BID 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, with leadership in power management, signal chain, and high-reliability ICs.

The TL77xxB family was engineered specifically for robust reset control in microprocessor-based systems, emphasizing precision thresholding, temperature stability, and flexible timing - targeting industrial, automotive, and communications infrastructure applications.

FAQ

What is the exact undervoltage threshold voltage for TL7702BID?

The TL7702BID has a nominal negative-going input threshold voltage (V_IT–) of 2.53 V at 25°C, with a tolerance of ±25 mV over temperature. This value is specified in Section 6.5 of the TI SLVS037O datasheet and applies directly to the TL7702BID variant characterized for –40°C to 85°C operation. The threshold remains stable due to internal temperature compensation, ensuring consistent reset behavior across its full industrial temperature range.

Does TL7702BID provide both active-high and active-low reset signals?

Yes, TL7702BID provides true and complement reset outputs: RESET (Pin 6, active-high, open-collector) and RESET (Pin 5, active-low, open-collector). Both outputs assert simultaneously during undervoltage events or power-up, enabling direct interface to microcontrollers or FPGAs requiring either polarity. External pull-up/pull-down resistors are required, and TI recommends matching resistor values to avoid waveform plateauing.

How is reset pulse duration set on TL7702BID?

Reset pulse duration on TL7702BID is set externally via capacitor CT connected to Pin 3. The relationship is td ≈ 2.6 × 10⁴ × CT (seconds), where CT is in farads. For example, a 0.1 µF capacitor yields ~2.6 ms. The timing capacitor charges from an internal current source, and the value may vary ±15% due to process variation - design margins should account for this spread.

Can TL7702BID's REF pin be used as a system reference voltage?

Yes, the REF pin (Pin 1) of TL7702BID delivers a precision 2.53 V ±50 mV reference over –40°C to 85°C, making it suitable for biasing external circuits such as ADC references or comparator thresholds. A 0.1 µF capacitor to GND is mandatory to stabilize the output and prevent noise-induced false triggering - this requirement is explicitly stated in TI's application guidance for TL7702BID.

What package and temperature grade does TL7702BID use?

TL7702BID uses an 8-pin SOIC (D) package (4.90 mm × 3.91 mm) and is rated for industrial temperature operation from –40°C to 85°C. This is confirmed in TI's official packaging addendum, where TL7702BID is listed with MSL Level-1 reflow rating and part marking "7702BI". It is distinct from the commercial-grade TL7702BCD (0°C to 70°C) and automotive variants.