Texas Instruments TL7712ACD

Overview

TL7712ACD from Texas Instruments is a precision supply-voltage supervisor IC designed for reset control in 12-V microprocessor and CMOS systems. It features a nominal 10.8-V sense threshold (V_IT−), 35-mV hysteresis, externally adjustable reset pulse duration via CT pin, temperature-compensated 2.53-V reference output, and operates across 3.5 V to 18 V supply range. Used in industrial embedded controllers requiring reliable power-on and brownout reset.

For engineers reviewing the TL7712ACD datasheet, TL7712ACD pinout, TL7712ACD application, or TL7712ACD equivalent, key selection criteria include its fixed 10.8-V undervoltage detection threshold, dual active-high/active-low reset outputs (RESET/RESET), SOIC-8 package compatibility, and support for external timing capacitor adjustment of reset pulse width.

Technical Context

The TL7712ACD implements a precision voltage comparator with trimmed internal reference and hysteresis to detect undervoltage at the SENSE input relative to its 10.8-V trip point. Its internal delay timer is triggered upon positive-going threshold crossing and generates a programmable reset pulse determined by external capacitor CT (td ≈ 1.3 × 10⁴ × C_T seconds).

It delivers two complementary open-collector reset outputs-RESET (active-low) and RESET (active-high)-enabling direct interface with microcontrollers requiring either polarity. The REF pin provides a stable 2.53-V reference usable for external circuit biasing or calibration, with <±16 mV variation over –40°C to +85°C.

Key Specifications

Pinout & Package

TL7712ACD is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, RoHS-compliant with NiPdAu lead finish and Level-1 moisture sensitivity rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL7712ACP and TPS3808G12, TL7712ACD delivers factory-trimmed 10.8-V detection without external components, includes a usable reference output, and fits compact SOIC layouts-making it ideal for production 12-V embedded systems where simplicity and reliability are prioritized over adjustability.

Availability

TL7712ACD is available at Aetrix Electronics and suitable for industrial automation, embedded controller, and telecom power management applications requiring stable component supply and long-term lifecycle support.

Supply support for TL7712ACD 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 ICs.

The TL77xxA family was developed specifically as precision supply-voltage supervisors for microcomputer and microprocessor reset control, targeting robustness in noisy industrial environments and compatibility with legacy 12-V and 5-V systems.

FAQ

What is the exact undervoltage detection threshold of TL7712ACD?

The TL7712ACD has a guaranteed negative-going input threshold voltage (V_IT−) of 10.6 V to 11.0 V at 25°C, with a typical value of 10.8 V. This fixed threshold is factory-trimmed and optimized for monitoring 12-V power rails. Hysteresis of 35 mV ensures clean transition without oscillation during slow supply variations. The TL7712ACD datasheet specifies this parameter under Electrical Characteristics section 6.5.

Does TL7712ACD require external components to function?

Yes, TL7712ACD requires three external components for basic operation: a 0.1-µF capacitor between REF and GND, a 0.1-µF capacitor between CT and GND, and a pull-up resistor on RESET or RESET (typically 10 kΩ). These ensure stable reference generation, accurate timing, and proper logic-level output drive. The TL7712ACD does not operate reliably without them, as specified in Section 9.2.1 of the datasheet.

Can TL7712ACD monitor voltages other than 12 V?

TL7712ACD is optimized for 12-V rails but can supervise higher or lower voltages using an external resistor divider at the SENSE pin-provided the divided voltage stays within its 0–20 V input range and meets the 10.8-V threshold requirement. However, doing so adds tolerance error and temperature drift; for non-12-V rails, TI recommends TL7705A (4.55 V) or TL7715A (13.5 V) instead of modifying TL7712ACD.

What is the purpose of the REF pin on TL7712ACD?

The REF pin on TL7712ACD provides a precision 2.53-V temperature-compensated voltage reference output, usable for biasing external comparators, ADC references, or sensor excitation. It sources up to 100 µA and requires a 0.1-µF bypass capacitor to GND for stability. Unlike many supervisors, TL7712ACD integrates this reference to reduce BOM count and improve system-level accuracy-confirmed in Section 6.5 and Figure 8 of the TL7712ACD datasheet.

Is TL7712ACD pin-compatible with other TL77xxA variants?

Yes, all TL77xxA devices-including TL7712ACD, TL7705ACD, and TL7709ACD-are fully pin-compatible in SOIC-8 (D) and PDIP-8 (P) packages. They share identical pinout, electrical interface, and timing behavior; only the SENSE threshold voltage differs. This allows drop-in replacement during design iteration or voltage rail changes, as documented in the Pin Configuration and Functions section (page 3) of the TL7712ACD datasheet.