Texas Instruments TLC7733IPW

Overview

TLC7733IPW from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 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 low-power reset assurance.

For engineers reviewing the TLC7733IPW datasheet, TLC7733IPW pinout, TLC7733IPW application, or TLC7733IPW equivalent, this page delivers verified specifications, TSSOP-8 package details, functional timing behavior, real-world use cases in power-critical embedded systems, and validated alternative parts for design continuity.

Technical Context

The TLC7733IPW implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 2.93 V (±70 mV hysteresis) sensing over –40°C to 85°C. Its internal timer generates a user-defined reset delay (td = 2.1 × 10⁴ × CT) after VDD exceeds 1 V and SENSE recovers above threshold.

It supports dual reset logic modes: when CONTROL is grounded, RESET becomes active-high; otherwise, it operates as active-low. The device features totem-pole outputs capable of sourcing –2 mA and sinking 2 mA, with defined output states down to VDD ≥ 1 V-enabling robust reset assertion during brownout conditions.

Key Specifications

Pinout & Package

TLC7733IPW is housed in an 8-pin TSSOP (PW) package, 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant, with moisture sensitivity level (MSL) 1 and peak reflow rating of 260°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7733IPW, TPS3808G33DBVR offers dramatically lower current but sacrifices manual reset and SRAM control functionality, while MAX6326UT33D3+T reduces feature count and package size at the cost of output flexibility and integrated delay programming.

Availability

TLC7733IPW is available at Aetrix Electronics and suitable for medical imaging systems, industrial PLCs, portable diagnostic devices, and automotive infotainment modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TLC7733IPW 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 designed specifically for micropower voltage supervision in microcomputer and microprocessor systems, emphasizing low-current operation, accurate thresholding, and flexible reset timing for embedded safety-critical applications.

FAQ

What is the exact sense threshold voltage of the TLC7733IPW?

The TLC7733IPW has a nominal sense threshold voltage of 2.93 V, with a typical tolerance of ±70 mV hysteresis. This value is factory-trimmed and temperature-compensated, ensuring stable operation across its –40°C to +85°C operating range without external calibration. Electrical characteristics confirm VIT– = 2.86 V (min) to 3.00 V (max) at VDD = 2 V to 6 V.

Can the TLC7733IPW be used to control battery-backed static RAM?

Yes, the TLC7733IPW supports power-down control for static RAM with battery backup. When the CONTROL pin is tied to GND, the RESET output becomes active-high and can directly drive the chip select (CS) of SRAM. This automatically disables the memory during main supply failure, preserving data integrity-provided the TLC7733IPW itself is powered from the backup source.

How is the reset delay time set on the TLC7733IPW?

The reset delay time (td) on the TLC7733IPW is set externally using a capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT, yielding 2.1 ms with a 100 nF capacitor. This delay begins after SENSE voltage rises above threshold and ensures the system remains held in reset long enough for stable clock and supply establishment.

Does the TLC7733IPW have both active-high and active-low reset outputs?

Yes, the TLC7733IPW provides complementary reset outputs: RESET (active-low) and RESET (active-high). Their logic states are defined in the function table and depend on RESIN and CONTROL inputs. When CONTROL = VDD and RESIN = high, RESET is low and RESET is high during normal operation; both invert during reset assertion.

What is the maximum supply current consumption of the TLC7733IPW?

The TLC7733IPW draws a maximum supply current of 16 µA under recommended operating conditions (VDD = 5 V, TA = 25°C). During the reset delay period (td), current increases to 120–150 µA due to internal timer activation. This ultra-low quiescent current makes the TLC7733IPW suitable for battery-powered and energy-sensitive applications.