Texas Instruments TLC7701IPWR

Overview

TLC7701IPWR from Texas Instruments is a micropower supply voltage supervisor IC with programmable reset delay, 1.1 V precision sense threshold, and active-high RESET output. It operates from 2 V to 6 V supply, draws ≤16 µA quiescent current, and supports power-down control for battery-backed static RAM in microprocessor systems.

For engineers reviewing the TLC7701IPWR datasheet, TLC7701IPWR pinout, TLC7701IPWR application, or TLC7701IPWR equivalent, this page delivers verified electrical specs, DRB-package terminal mapping, medical imaging and industrial control use cases, and two validated alternative supervisors with documented threshold and timing differences.

Technical Context

The TLC7701IPWR implements a precision voltage monitoring circuit with temperature-compensated reference and internal power-on reset generator. It asserts RESET when VDD ≥1 V and maintains reset while SENSE voltage remains below 1.1 V (±3% over temperature), with delay time set by external capacitor (td = 2.1×10⁴ × CT).

Its dual-output architecture includes RESET (active-high) and RESIN (active-low) with totem-pole drive, enabling direct interface to microcontroller reset inputs and memory chip-select lines. CONTROL pin enables battery-backup mode for static RAM retention during main power loss.

Key Specifications

Pinout & Package

Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7701IPWR, TLC7703IPWR shifts the sensing window upward for mid-rail monitoring, while TPS3808G12DBVR trades programmable delay and power-down control for nanowatt quiescent current-making each suitable for distinct power architecture priorities.

Availability

TLC7701IPWR is available at Aetrix Electronics and suitable for medical imaging, industrial PLCs, and smart metering applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for TLC7701IPWR 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, embedded processing, and connectivity solutions with emphasis on reliability and industrial-grade performance.

The TLC77xx family was designed specifically for robust, low-power supply monitoring in microcomputer systems-emphasizing precision threshold stability, programmable timing, and battery-backup memory control in harsh environments.

FAQ

What is the exact sense threshold voltage of the TLC7701IPWR?

The TLC7701IPWR has a nominal sense threshold voltage of 1.1 V, with a tolerance of ±3% across –40°C to 85°C and 2 V to 6 V supply range. This value is factory-trimmed and temperature-compensated using an internal bandgap reference, ensuring stable detection for low-voltage rails like 1.2 V FPGA cores or 1.8 V I/O domains. The TLC7701IPWR datasheet specifies min/max bounds of 1.04 V and 1.16 V under recommended operating conditions.

How is the reset delay time calculated for the TLC7701IPWR?

The reset delay time (td) of the TLC7701IPWR is determined solely by the external capacitor connected to the CT pin: td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields td ≈ 2.1 ms. This linear relationship allows precise, board-level tuning without firmware changes. The TLC7701IPWR does not use internal RC networks or digital counters-delay accuracy depends only on capacitor tolerance and PCB leakage.

Does the TLC7701IPWR support battery-backed static RAM retention?

Yes, the TLC7701IPWR supports battery-backed static RAM retention via its CONTROL pin. When CONTROL is driven low, the device configures RESET to act as an active-high signal that can directly drive the chip select (CS) of battery-backed SRAM. During main power failure, the TLC7701IPWR disables the memory while maintaining backup power-enabling seamless data retention without external MOSFETs or logic. This function is explicitly documented in the TLC7701IPWR application section and Figure 10 of the datasheet.

What is the maximum supply current of the TLC7701IPWR during reset delay?

The TLC7701IPWR draws up to 150 µA during the reset delay period (td), as measured with VDD = 5 V, RESIN = VDD, SENSE = VDD, and CONTROL = 0 V. This elevated current occurs only while the internal timer is active and returns to ≤16 µA once delay completes and outputs stabilize. The TLC7701IPWR datasheet specifies this value in the "Supply current during td" (IDD(d)) parameter under Electrical Characteristics, confirming it is not a transient spike but a defined operational mode current.

Can the TLC7701IPWR operate with a 1.5 V supply?

No, the TLC7701IPWR requires a minimum supply voltage of 2 V per its Recommended Operating Conditions. Below 2 V, internal circuitry-including the voltage reference, comparator, and output drivers-cannot guarantee correct functionality. While the device asserts RESET down to VDD = 1 V for power-on detection, sustained operation (e.g., monitoring, delay timing, output drive) is only specified from 2 V to 6 V. Using 1.5 V violates the absolute minimum rating and risks undefined behavior or latch-up.