Texas Instruments TLC7701QPWREP

Overview

TLC7701QPWREP from Texas Instruments is a micropower supply voltage supervisor IC designed for power-on reset and undervoltage monitoring in microcomputer systems. It features a precision 1.1 V sense threshold, programmable delay via external capacitor (td = 2.1×10⁴ × CT), totem-pole RESET/RESET outputs, and operates across –40°C to 125°C. It supports static RAM power-down control in battery-backed memory applications.

For engineers reviewing the TLC7701QPWREP datasheet, TLC7701QPWREP pinout, TLC7701QPWREP application, or TLC7701QPWREP equivalent, this page delivers verified electrical specs, TSSOP-8 package details, functional timing behavior, and qualified alternatives for defense, aerospace, and medical-grade embedded designs.

Technical Context

The TLC7701QPWREP implements a precision voltage-sensing comparator with temperature-compensated internal reference and hysteresis (30 mV). Its dual active-high/active-low RESET outputs are controlled by SENSE input voltage relative to VIT− (1.04–1.16 V), RESIN (reset enable), and CONTROL (RAM power-down mode selector).

Delay timing is externally set via capacitor CT on the CT pin, yielding td = 2.1×10⁴ × CT seconds. The device asserts RESET when VDD ≥ 1 V at power-up, then monitors SENSE continuously; RESET remains active until SENSE exceeds VIT+ and the programmed delay expires.

Key Specifications

Pinout & Package

TSSOP-8 (PW) package, 3.0 mm × 4.4 mm, 1.2 mm max height, lead-free NiPdAu finish, MSL Level-1, tape-and-reel (2000 pcs/reel), left-end taped per TI specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7701QPWREP, TLC7705QPWREP offers higher threshold for 5 V systems but loses sub-2 V capability, while TPS3808G125DBVR trades programmable delay and RAM control for lower quiescent current and flexible threshold setting.

Availability

TLC7701QPWREP is available at Aetrix Electronics and suitable for industrial PLC controllers, aerospace avionics modules, and medical imaging power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TLC7701QPWREP 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 high-reliability components for industrial, automotive, and aerospace markets.

The TLC77xx-EP product line delivers enhanced plastic packaged voltage supervisors engineered for defense, aerospace, and medical applications with extended temperature range, controlled baseline, and full traceability.

FAQ

What is the exact sense threshold voltage range for TLC7701QPWREP?

The TLC7701QPWREP has a guaranteed negative-going input threshold voltage (VIT−) of 1.04 V to 1.16 V at TA = –40°C to 125°C. This 1.1 V nominal threshold is internally trimmed and temperature-compensated, enabling reliable supervision of 1.2 V and 1.8 V logic supplies. The device also provides 30 mV hysteresis to prevent chatter during marginal voltage conditions.

How does the CONTROL pin function in TLC7701QPWREP?

In TLC7701QPWREP, the CONTROL pin configures the RESET output polarity and enables SRAM power-down functionality. When CONTROL is grounded, RESET becomes active-high-allowing direct connection to chip-select inputs of battery-backed static RAM. This feature automatically disables memory access during power failure, preserving data integrity without external logic.

Can TLC7701QPWREP operate with supply voltages below 2 V?

Yes-TLC7701QPWREP asserts RESET when VDD reaches 1 V at power-up and maintains defined operation down to VDD = 2 V per recommended conditions. While the absolute maximum rating allows 7 V, the device is specified for reliable sensing and output drive between 2 V and 6 V. Below 2 V, RESET remains asserted but some parameters (e.g., VOL, VOH) are not guaranteed.

What capacitor value yields a 100 ms reset delay for TLC7701QPWREP?

Using the formula td = 2.1×10⁴ × CT, a 100 ms (0.1 s) delay requires CT = 0.1 / 21000 ≈ 4.76 nF. A standard 4.7 nF ceramic capacitor achieves td ≈ 99 ms. For production use, a 5.6 nF capacitor yields ~118 ms, providing margin against tolerance and temperature drift while remaining within typical PCB footprint constraints.

Is TLC7701QPWREP pin-compatible with other TLC77xx-EP variants?

Yes-TLC7701QPWREP shares identical TSSOP-8 (PW) pinout and package dimensions with TLC7705QPWREP and TLC7733QPWREP. All three devices have matching pin assignments for CONTROL, RESIN, CT, GND, VDD, SENSE, RESET, and RESET. However, their sense thresholds differ (1.1 V, 4.5 V, and 2.93 V respectively), so substitution requires validation of threshold compatibility with the target supply rail.