Texas Instruments TLC7701QPWR

Overview

TLC7701QPWR from Texas Instruments is a micropower supply voltage supervisor IC with programmable reset delay, precision 1.1 V threshold sensing, and active-high RESET output. It operates from 2 V to 6 V supply, draws ≤16 µA quiescent current, and supports industrial temperature range (–40°C to 125°C) in an 8-pin TSSOP package. It is used for power-on reset and undervoltage monitoring in microprocessor systems with battery-backed SRAM.

For engineers reviewing the TLC7701QPWR datasheet, TLC7701QPWR pinout, TLC7701QPWR application, or TLC7701QPWR equivalent, key selection considerations include its adjustable delay via external capacitor, defined RESET assertion down to VDD ≥1 V, and support for power-down control of static RAM during brownout events.

Technical Context

The TLC7701QPWR implements a precision voltage comparator with temperature-compensated reference and internal timer circuitry. Its SENSE input monitors system voltage against a fixed 1.1 V threshold (VIT– = 1.04–1.16 V), with 30 mV hysteresis to prevent chatter near trip point.

Reset assertion occurs at power-up when VDD reaches ≥1 V, then transitions to undervoltage supervision once VDD ≥2 V. Delay time td = 2.1 × 10⁴ × CT seconds is set by an external capacitor on the CT pin, enabling configurable reset hold duration from milliseconds to seconds.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E33DBVR and TPS3808G33DBVR, the TLC7701QPWR uniquely provides 1.1 V threshold sensing, capacitor-programmable delay, and dedicated CONTROL pin for battery-backed SRAM management-making it irreplaceable in low-voltage, delay-tunable, and data-retention-critical designs.

Availability

TLC7701QPWR is available at Aetrix Electronics and suitable for medical imaging, industrial automation, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC7701QPWR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and industrial ICs.

The TLC77xx family was designed specifically for micropower voltage supervision in microcomputer and microprocessor systems, emphasizing low IDD, wide temperature operation, and robust brownout recovery-including SRAM data retention features for mission-critical applications.

FAQ

What is the exact threshold voltage tolerance of the TLC7701QPWR?

The TLC7701QPWR has a negative-going input threshold voltage (VIT–) of 1.04 V (min) to 1.16 V (max) at VDD = 2 V to 6 V, with typical value 1.1 V. This ±5.5% tolerance is specified across the full operating temperature range (–40°C to 125°C) and ensures reliable undervoltage detection without external trimming.

How does the CONTROL pin affect RESET behavior in the TLC7701QPWR?

When the CONTROL pin of the TLC7701QPWR is tied to GND, the RESET output becomes active-high - matching standard microprocessor reset inputs. This configuration also enables power-down control for static RAM by gating chip select during brownout, a feature not available in most competing supervisors.

Can the TLC7701QPWR operate reliably at 2 V supply voltage?

Yes, the TLC7701QPWR is fully specified from 2 V to 6 V. At VDD = 2 V, it delivers VOH ≥1.8 V (with IOH = –20 µA) and VOL ≤0.2 V (with IOL = 20 µA), ensuring compatible logic levels with 2 V–3.3 V microcontrollers while maintaining 16 µA max supply current.

What is the recommended capacitor value for a 100 ms reset delay using the TLC7701QPWR?

Using the formula td = 2.1 × 10⁴ × CT, a 100 ms delay requires CT = 100 × 10⁻³ / 2.1 × 10⁴ = 4.76 nF. A standard 4.7 nF ceramic capacitor is recommended, placed close to the CT pin with short traces to minimize noise coupling and ensure timing accuracy.

Is the TLC7701QPWR pin-compatible with other members of the TLC77xx family?

Yes, all TLC77xx devices including TLC7701QPWR, TLC7725QPWR, and TLC7733QPWR share identical 8-pin TSSOP (PW) pinout and footprint. This allows direct substitution within the same family when only threshold voltage differs - simplifying design reuse and inventory consolidation.