Texas Instruments TLC7705IPG4

Overview

TLC7705IPG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 4.55 V sense threshold, active-low RESET output, programmable delay via external capacitor, and operation across 2 V to 6 V supply range. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup - used in medical imaging systems requiring high-reliability voltage monitoring.

For engineers reviewing the TLC7705IPG4 datasheet, TLC7705IPG4 pinout, TLC7705IPG4 application, or TLC7705IPG4 equivalent, this page delivers verified specifications, DRB-package pin mapping, real-world use cases in critical power-monitoring circuits, and validated alternative options for design continuity.

Technical Context

The TLC7705IPG4 implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 4.55 V (±2%) threshold detection over –40°C to 125°C. Its internal timer generates a user-programmable reset delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above threshold.

It features dual-output logic: active-low RESET and active-high RESET, both defined down to VDD ≥ 1 V. The CONTROL input enables RAM power-down mode by configuring RESET polarity and enabling chip-select gating during brownout events.

Key Specifications

Pinout & Package

Package: 8-pin SON (DRB), 3 mm × 3 mm, 0.5 mm pitch, non-magnetic variant available for medical imaging.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7705IPG4, TPS3808G33DBVR offers lower quiescent current but lacks the CONTROL pin for SRAM power-down coordination, while MAX6326UT46D3+T provides higher threshold accuracy and push-pull drive but omits the complementary RESET output and programmable delay flexibility.

Availability

TLC7705IPG4 is available at Aetrix Electronics and suitable for medical imaging systems, industrial PLCs, automotive body control modules, and battery-backed data loggers requiring stable component supply with long-term lifecycle support.

Supply support for TLC7705IPG4 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, longevity, and industrial-grade qualification.

The TLC77xx family was designed specifically for micropower voltage supervision in safety-critical and battery-sensitive applications - emphasizing precision threshold stability, wide temperature operation, and integrated power-down control for static RAM.

FAQ

What is the exact sense threshold voltage of the TLC7705IPG4?

The TLC7705IPG4 has a fixed negative-going input threshold voltage (VIT–) of 4.55 V (typical), with a guaranteed range of 4.47 V to 4.63 V over full temperature and supply conditions. This value is factory-trimmed and temperature-compensated using an internal bandgap reference, ensuring consistent 5 V rail monitoring without external components.

Does the TLC7705IPG4 support operation below 2 V?

Yes - the TLC7705IPG4 asserts RESET when VDD reaches ≥1 V, and its reset function remains defined down to that level. However, full specification compliance (e.g., threshold accuracy, delay timing, output drive) applies only within the recommended operating range of 2 V to 6 V. Below 2 V, only basic reset assertion is guaranteed.

How is the reset delay time set on the TLC7705IPG4?

The reset delay time (td) on the TLC7705IPG4 is set externally using a capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields ~2.1 ms delay. No resistor is required - timing depends solely on CT value and internal constant.

What is the purpose of the CONTROL pin on the TLC7705IPG4?

The CONTROL pin on the TLC7705IPG4 selects reset output polarity and enables RAM power-down mode: when CONTROL is low, RESET is active-high (used to disable SRAM chip select during power loss); when high, RESET operates as standard active-low. This dual-mode capability allows seamless integration with battery-backed static RAM without additional logic.

Is the TLC7705IPG4 RoHS-compliant and lead-free?

Yes - the TLC7705IPG4 uses NiPdAu (NIPDAU) lead finish and is RoHS-compliant. Per TI's packaging documentation, it carries Level-1 MSL rating with peak reflow tolerance up to 260°C, and is supplied in tape-and-reel (large T&R) format with part marking "Y7705".