Texas Instruments TLC7701IPWRG4

Overview

TLC7701IPWRG4 from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a programmable delay time (1.1–4.2 ms), 1.1 V threshold voltage, 16 µA max supply current, and operates across 2 V to 6 V supply range. It supports power-down control for static RAM with battery backup in medical imaging and industrial embedded systems.

For engineers reviewing the TLC7701IPWRG4 datasheet, TLC7701IPWRG4 pinout, TLC7701IPWRG4 application, or TLC7701IPWRG4 equivalent, this page provides verified technical context, real-world timing behavior, reset output polarity configuration, and validated alternatives for undervoltage monitoring in low-power embedded designs.

Technical Context

The TLC7701IPWRG4 implements a precision voltage sensor with temperature-compensated reference and automatic reset generation after voltage drop. Its SENSE input monitors supply rail or external voltage, asserting RESET when VI(SENSE) falls below 1.1 V (±3% over temperature), with 70 mV hysteresis to prevent chatter.

Delay time (td = 2.1 × 10⁴ × CT) is externally set via capacitor on the CT pin, enabling configurable reset hold duration. The device supports both active-high and active-low RESET outputs depending on CONTROL pin state, and maintains defined RESET output down to VDD ≥ 1 V during power-on sequencing.

Key Specifications

Pinout & Package

Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12DBVR and MAX6326UT29D3+, the TLC7701IPWRG4 uniquely supports user-defined delay timing, dual-polarity reset outputs, and manual reset override - making it suitable for complex power-sequencing architectures where timing and interface flexibility are critical.

Availability

TLC7701IPWRG4 is available at Aetrix Electronics and suitable for medical imaging systems, industrial PLC controllers, and portable diagnostic devices requiring stable component supply and long-term lifecycle support.

Supply support for TLC7701IPWRG4 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLC77xx family was designed specifically for micropower supply supervision in resource-constrained embedded systems, emphasizing low IQ, wide supply range, and robust reset timing control for mission-critical power management.

FAQ

What is the exact threshold voltage tolerance for TLC7701IPWRG4 over temperature?

The TLC7701IPWRG4 has a nominal threshold voltage of 1.1 V with ±3% tolerance over the full operating temperature range (–40°C to +85°C), as specified in the Electrical Characteristics table under VIT– parameter. This tolerance includes initial accuracy, temperature drift, and process variation - ensuring reliable detection across industrial thermal profiles without calibration.

How does the CONTROL pin affect reset polarity in TLC7701IPWRG4?

In the TLC7701IPWRG4, the CONTROL pin determines reset output polarity: when CONTROL is low (≤0.2×VDD), RESET is active high and RESET is active low; when CONTROL is high (≥0.7×VDD), both outputs invert polarity. This dual-mode capability allows direct interfacing with MCUs requiring either active-high or active-low reset signals without external logic.

Can TLC7701IPWRG4 be used with a 1.8 V supply rail?

Yes, the TLC7701IPWRG4 supports supply voltages from 2 V to 6 V, so it cannot operate directly from a 1.8 V rail. However, it can monitor a 1.8 V rail via the SENSE pin while being powered from a higher auxiliary supply (e.g., 3.3 V), since SENSE input threshold is fixed at 1.1 V and independent of VDD within spec limits.

What is the minimum recommended CT capacitor value for stable delay timing in TLC7701IPWRG4?

The datasheet specifies CT = 100 nF for typical 2.1 ms delay measurement, and recommends ceramic capacitors with ≤100 pF parasitic capacitance. While no absolute minimum is stated, values below 10 nF yield sub-microsecond delays outside guaranteed specification; 100 nF is the validated design point for production use with <±10% timing variation.

Does TLC7701IPWRG4 support battery backup for SRAM without external transistors?

Yes - the TLC7701IPWRG4 integrates dedicated logic for battery-backed SRAM control. When CONTROL is grounded, the RESET output drives chip select (CS) low during main supply failure, automatically disabling the memory. This requires only the TLC7701IPWRG4, a backup battery, and proper VDD routing - no external FETs or discrete logic needed.