Texas Instruments TLC7725IDG4

Overview

TLC7725IDG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.25 V threshold, designed for reset control in microcomputer systems. It features power-on reset generation, automatic reset after voltage drop, programmable delay via external capacitor (td = 2.1 × 10⁴ × CT), defined RESET output down to VDD ≥ 1 V, and maximum supply current of 16 µA - enabling reliable system initialization in battery-powered medical imaging equipment.

For engineers reviewing the TLC7725IDG4 datasheet, TLC7725IDG4 pinout, TLC7725IDG4 application, or TLC7725IDG4 equivalent, key selection criteria include its DRB package footprint, –40°C to 85°C operating range, active-low RESET output with totem-pole drive, and compatibility with static RAM power-down control in low-voltage embedded systems.

Technical Context

The TLC7725IDG4 monitors the SENSE input against a precision, temperature-compensated 2.25 V threshold (VIT– = 2.18–2.32 V) and asserts RESET when VI(SENSE) falls below threshold or during power-up until VDD ≥ 1 V. An internal timer enforces a user-programmable delay (1.1–4.2 ms typical with 100 nF) before deasserting RESET after recovery.

It supports dual-mode operation: when CONTROL is grounded, RESET is active-high; when CONTROL is high, RESET is active-low. The device includes power-saving totem-pole outputs, operates across 2 V to 6 V supply, and delivers defined logic levels (VOH ≥ 3.7 V at VDD = 4.5 V, VOL ≤ 0.5 V at IOL = 2 mA) over full temperature range.

Key Specifications

Pinout & Package

Package: 8-pin SON (DRB), 3.0 mm × 3.0 mm, 0.5 mm pitch, exposed thermal pad - optimized for space-constrained PCB layouts and thermal performance in medical imaging modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12DBVR and MAX6326UT23D3+T, the TLC7725IDG4 uniquely combines programmable delay, dual-polarity RESET control, and SRAM power-down support - making it optimal for legacy-compatible, function-rich supervisory roles in medical and industrial systems.

Availability

TLC7725IDG4 is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLC controllers, and battery-backed data loggers requiring stable component supply with long-term manufacturability and RoHS-compliant packaging.

Supply support for TLC7725IDG4 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, precision, and energy efficiency.

The TLC77xx family was engineered specifically for micropower voltage supervision in safety-critical and battery-operated systems - emphasizing precision threshold stability, low IQ, and robust reset timing control across extended temperature ranges.

FAQ

What is the exact threshold voltage tolerance for TLC7725IDG4?

The TLC7725IDG4 has a guaranteed negative-going input threshold voltage (VIT–) of 2.18 V (min) to 2.32 V (max) at VDD = 2 V to 6 V, with typical value 2.25 V. This ±0.07 V tolerance ensures consistent undervoltage detection across process, voltage, and temperature variations - critical for repeatable system reset behavior in the TLC7725IDG4.

Does TLC7725IDG4 support active-high RESET output?

Yes - the TLC7725IDG4 supports active-high RESET when the CONTROL pin is tied to GND. When CONTROL = low, RESET goes high during fault conditions; when CONTROL = high, RESET goes low. This dual-mode capability allows direct interface with MCUs requiring either polarity, and is explicitly documented in the TLC7725IDG4 functional block diagram and timing table.

What capacitor value yields a 2.1 ms reset delay for TLC7725IDG4?

A 100 nF external capacitor (CT) produces a typical delay time (td) of 2.1 ms for the TLC7725IDG4, calculated using td = 2.1 × 10⁴ × CT. With CT = 100 nF = 0.1 µF, td = 2.1 × 10⁴ × 10⁻⁷ = 2.1 × 10⁻³ s. This value is confirmed in the TLC7725IDG4 switching characteristics table under "Delay time" test condition.

Is TLC7725IDG4 pin-compatible with other TLC77xx variants in DRB package?

Yes - all TLC77xx devices in the DRB package (e.g., TLC7701IDRBT-NM, TLC7703IDRBT-NM) share identical 8-pin SON footprints and pin assignments. The TLC7725IDG4 uses the same DRB layout as specified in TI's SLVS087M datasheet Package Option Addendum, enabling drop-in replacement within the same threshold family when board-level redesign is not feasible.

What is the maximum recommended load capacitance for the RESET output of TLC7725IDG4?

The TLC7725IDG4 RESET output is characterized with CL = 50 pF in switching tests, and its totem-pole driver supports up to 2 mA sink current with VOL ≤ 0.5 V. While no absolute maximum CL is specified, TI application guidance recommends keeping total capacitive load ≤ 100 pF (including PCB trace and MCU input capacitance) to maintain <20 µs propagation delay and avoid excessive rise/fall time degradation in the TLC7725IDG4.