Texas Instruments TL7702BIP

Overview

TL7702BIP from Texas Instruments is a precision supply-voltage supervisor IC designed as a reset controller for microcomputer systems. It monitors the SENSE input for undervoltage conditions, provides true and complement RESET outputs (active-high and active-low), features a 2.53 V ±0.05 V temperature-compensated reference voltage, and supports externally adjustable reset pulse duration via CT pin. It operates across 3.6 V to 18 V supply range and is rated for –40°C to +85°C industrial temperature range.

For engineers reviewing the TL7702BIP datasheet, TL7702BIP pinout, TL7702BIP application, or TL7702BIP equivalent, this page delivers verified electrical characteristics, validated PDIP-8 package mapping, confirmed dual-reset functionality, precise threshold hysteresis (10 mV), and real-world timing behavior under load - all critical for reliable power-on and brownout reset design in embedded control systems.

Technical Context

The TL7702BIP integrates a precision bandgap reference, dual comparators (one for V_IT–, one for V_RES), and an internal current source driving the external CT capacitor to generate programmable reset delay. Its SENSE input directly monitors system supply voltage with 2.53 V nominal trip point and 10 mV hysteresis, while RESIN enables manual reset override independent of supply monitoring.

Both RESET and RESET outputs are open-collector, requiring external pull-up/pull-down resistors; simultaneous termination with matched resistors prevents waveform plateauing. The REF output delivers a stable 2.53 V reference (±0.05 V at 25°C) for external circuit use, and the device remains functional down to V_CC ≥ 1 V to ensure early power-on reset assertion.

Key Specifications

Pinout & Package

TL7702BIP is housed in an 8-pin PDIP (Plastic Dual In-line Package) with body dimensions 9.81 mm × 6.35 mm and standard 0.3-inch lead spacing. This through-hole package supports robust prototyping, legacy board assembly, and high-reliability industrial applications where thermal cycling and mechanical stability are critical.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7702BCP and MAX692CPA+, the TL7702BIP uniquely combines –40°C to +85°C qualification, user-adjustable reset timing via CT, and a buffered 2.53 V reference output - making it optimal for industrial edge devices where environmental resilience, timing flexibility, and analog subsystem integration are jointly required.

Availability

TL7702BIP is available at Aetrix Electronics and suitable for industrial PLC control, factory automation HMI, building management system gateways, and networked sensor nodes requiring stable component supply with long-term manufacturability and consistent parametric performance.

Supply support for TL7702BIP 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 leader specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability industrial and automotive IC design.

The TL77xxB family was developed specifically for robust, precision supply-voltage supervision in microprocessor-based control systems - emphasizing accurate threshold detection, noise-immune hysteresis, and flexible reset timing to prevent system lockup in mission-critical environments.

FAQ

What is the exact undervoltage detection threshold of the TL7702BIP?

The TL7702BIP has a nominal negative-going input threshold voltage (V_IT–) of 2.53 V at 25°C, with a tolerance of ±0.05 V over temperature. This value is specified in the Electrical Characteristics table for TL77xxBI devices and applies directly to TL7702BIP. The 10 mV hysteresis ensures clean transition behavior during supply recovery, and the threshold remains stable across the full –40°C to +85°C operating range.

Does the TL7702BIP require external components to function correctly?

Yes, the TL7702BIP requires three external components for reliable operation: a 0.1 µF capacitor from REF to GND to stabilize the reference output, a timing capacitor (CT) from pin 3 to GND to set reset pulse duration, and pull-up/pull-down resistors on RESET and RESET outputs respectively. TI recommends 10 kΩ resistors for both, and both outputs must be terminated even if only one is used to prevent waveform plateauing that could delay system reset.

Can the TL7702BIP supervise voltages other than its internal 2.53 V threshold?

Yes - while the internal comparator threshold is fixed at 2.53 V, the TL7702BIP can supervise higher voltages using a resistor divider on the SENSE input. For example, to monitor a 12 V rail, a 3.75 kΩ/1 kΩ divider scales 12 V to 2.53 V at SENSE. The device's input voltage rating (0–18 V) and high input impedance (<1 µA leakage) support such configurations without loading error, preserving threshold accuracy.

How does the CT pin determine reset pulse duration in the TL7702BIP?

The CT pin connects to an internal current source that charges the external capacitor. Reset pulse duration t_d is calculated as t_d ≈ 26,000 × C_T, where C_T is in farads. For a 0.1 µF capacitor, t_d ≈ 2.6 ms. The current source varies ±15% and Reference Voltage 2 varies ±5%, so actual delay may vary ±20%. This analog timing method eliminates reliance on clock sources or firmware, ensuring deterministic reset behavior across power cycles.

Is the TL7702BIP pin-compatible with other members of the TL77xxB family?

Yes - all TL77xxB devices (including TL7702BIP, TL7705BIP, and TL7733BIP) share identical 8-pin PDIP pinout, electrical interface, and functional block diagram. The only difference is the undervoltage threshold: TL7702BIP = 2.53 V, TL7705BIP = 4.55 V, TL7733BIP = 3.08 V. This allows drop-in replacement in existing layouts when threshold requirements change, provided the new threshold aligns with the supervised rail voltage.