Texas Instruments TLC7705IDG4

Overview

TLC7705IDG4 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 reliable reset under low-power and wide-temperature conditions.

For engineers reviewing the TLC7705IDG4 datasheet, TLC7705IDG4 pinout, TLC7705IDG4 application, or TLC7705IDG4 equivalent, this page delivers verified technical context, exact DRB package mapping, confirmed electrical parameters (VIT– = 4.47–4.63 V, td = 1.1–4.2 ms), and real-world design implications for reset timing, supply current (≤16 µA), and industrial temperature support.

Technical Context

The TLC7705IDG4 implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 4.55 V threshold detection over –40°C to 85°C. Its internal timer initiates after SENSE voltage crosses VIT–, generating a user-defined delay (td = 2.1 × 10⁴ × CT) before deasserting RESET.

It supports dual-mode reset control: RESIN enables manual reset override, while CONTROL input configures active-high RESET for memory power-down sequencing. The device features totem-pole outputs capable of sourcing 2 mA and sinking 10 mA, with defined RESET assertion down to VDD ≥1 V.

Key Specifications

Pinout & Package

Package: 8-pin SON (DRB), 3.0 mm × 3.0 mm, 0.5 mm pitch, wettable flank - optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7705QD and TPS3808G33DBVR, the TLC7705IDG4 uniquely balances industrial temperature compliance, 4.55 V precision threshold, DRB space savings, and integrated SRAM power-down control - making it optimal for compact, cost-sensitive medical and industrial controllers where those features converge.

Availability

TLC7705IDG4 is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLC controllers, battery-backed memory modules, and automotive infotainment boot sequencing requiring stable component supply and long-term manufacturability.

Supply support for TLC7705IDG4 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 monitoring in microcomputer and microprocessor systems - prioritizing precision threshold accuracy, programmable timing, and fail-safe behavior during power transients.

FAQ

What is the exact sense threshold voltage tolerance for TLC7705IDG4?

The TLC7705IDG4 has a guaranteed negative-going input threshold voltage (VIT–) of 4.47 V (min) to 4.63 V (max) across its full operating temperature and supply range. This 160 mV window centers on the nominal 4.55 V rating and includes hysteresis of 70 mV to prevent chatter during marginal supply conditions. These values are measured per TI's SLVS087M datasheet under recommended operating conditions.

Does TLC7705IDG4 support active-high RESET output?

Yes, the TLC7705IDG4 supports active-high RESET via the CONTROL pin: when CONTROL is tied to GND, the RESET output becomes active-high. This feature is explicitly designed for controlling static RAM chip select during power failure. The device does not include an internal inverter - polarity selection is achieved solely through external CONTROL pin logic level per the functional block diagram in the datasheet.

What capacitor value yields a 2.1 ms reset delay for TLC7705IDG4?

A 100 nF external capacitor (CT) produces a typical 2.1 ms reset delay for TLC7705IDG4, calculated using td = 2.1 × 10⁴ × CT. With CT = 100 nF (1 × 10⁻⁷ F), td = 2.1 × 10⁴ × 1 × 10⁻⁷ = 2.1 × 10⁻³ s = 2.1 ms. This value is validated in the Switching Characteristics table (SLVS087M, page 8) and matches the typical delay specification at VDD = 5 V and TA = 25°C.

Is TLC7705IDG4 RoHS compliant and lead-free?

Yes, TLC7705IDG4 is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as confirmed in TI's Package Option Addendum (15-Jul-2026). It carries MSL Level-1 rating with unlimited floor life at ≤30°C/60% RH and is qualified for lead-free reflow per JEDEC J-STD-020. The "G4" suffix denotes green (halogen-free) packaging consistent with TI's environmental standards.

Can TLC7705IDG4 operate with VDD = 1.8 V?

No, TLC7705IDG4 cannot operate reliably at VDD = 1.8 V. Its recommended operating supply voltage range is 2 V to 6 V per the datasheet's Recommended Operating Conditions table. While RESET is *defined* down to VDD ≥1 V for power-on assertion, functional supervision - including accurate threshold comparison, delay timing, and output drive - requires VDD ≥2 V. Operation below 2 V violates specifications and may result in undefined behavior.