Texas Instruments TLC7705ID

Overview

TLC7705ID 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 –40°C to 85°C. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup in microprocessor systems.

For engineers reviewing the TLC7705ID datasheet, TLC7705ID pinout, TLC7705ID application, or TLC7705ID equivalent, this page delivers verified electrical specs, DRB/SOIC-8 package details, timing behavior (td = 2.1×10⁴×CT), low 16 µA supply current, and design guidance for reliable system reset in medical imaging and industrial embedded applications.

Technical Context

The TLC7705ID monitors the SENSE input against a precision, temperature-compensated 4.55 V threshold (VIT– = 4.47–4.63 V) and asserts RESET when voltage drops below threshold or during power-up until VDD ≥1 V. An internal timer enforces a user-defined delay (td) before deasserting RESET after recovery, calculated as td = 2.1 × 10⁴ × CT seconds.

It supports dual reset modes: standard undervoltage supervision and CONTROL-pin-enabled power-down mode for static RAM retention. The device features totem-pole outputs, defined RESET behavior down to VDD ≥1 V, and operates over 2 V to 6 V supply range with maximum 10 mA sink/source capability.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.27 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 TLC7705QD, the TLC7705ID offers identical functionality at lower cost for commercial-temperature applications; versus TPS3808G33, it provides higher threshold accuracy, programmable timing, and hardware-level SRAM power-down control-critical for data integrity in mission-critical systems.

Availability

TLC7705ID is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLC controllers, and battery-backed data loggers requiring stable component supply, long-term manufacturability, and full traceability.

Supply support for TLC7705ID 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 robust, low-power supply supervision in microcomputer and microprocessor systems-prioritizing precision threshold stability, micropower operation, and integrated power-down logic for battery-backed memory.

FAQ

What is the exact sense threshold voltage of the TLC7705ID?

The TLC7705ID has a fixed negative-going input threshold voltage (VIT–) of 4.55 V, with guaranteed min/max values of 4.47 V and 4.63 V across temperature and supply voltage. This threshold is internally trimmed and temperature-compensated, making the TLC7705ID suitable for precise 5 V rail monitoring without external resistor dividers.

How is the reset delay time set on the TLC7705ID?

The reset delay time (td) of the TLC7705ID is set externally using a capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT seconds - for example, a 100 nF capacitor yields approximately 2.1 ms delay. This programmability eliminates fixed-timing ICs or discrete RC networks while maintaining tight tolerance via capacitor selection.

Does the TLC7705ID support both active-high and active-low reset outputs?

Yes, the TLC7705ID provides complementary reset outputs: an active-low RESET and an active-high RESET. Both are fully buffered totem-pole outputs capable of sinking or sourcing up to 10 mA. This dual-output architecture allows direct interface with microcontrollers, FPGAs, or ASICs requiring either polarity without external inverters.

Can the TLC7705ID be used to control battery-backed static RAM during power failure?

Yes - the TLC7705ID includes dedicated CONTROL logic for static RAM power-down. When CONTROL is tied to GND, the device asserts RESET during undervoltage and simultaneously disables memory chip select (CS) via external logic (e.g., NAND gate with microprocessor bank select). This feature is explicitly documented in Figure 10 of the SLVS087M datasheet and is a core function of the TLC7705ID.

What package and RoHS status does the TLC7705ID have?

The TLC7705ID is supplied in an 8-pin SOIC (D) package with 3.9 mm × 4.9 mm body, 1.27 mm pitch, and RoHS-compliant NiPdAu (NIPDAU) lead finish. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/85% RH) and is qualified for reflow per JEDEC J-STD-020. Part marking is "C7705I" per TI's packaging addendum.