Texas Instruments TLC7733QPWREP

Overview

TLC7733QPWREP from Texas Instruments is a micropower supply voltage supervisor IC used for power-on reset and undervoltage monitoring in microcomputer systems. It features a fixed 2.93 V sense threshold (VIT+), programmable delay via external capacitor, totem-pole RESET/RESET outputs, and operates from 2 V to 6 V supply across –40°C to 125°C. It supports static RAM power-down control in battery-backed memory applications.

For engineers reviewing the TLC7733QPWREP datasheet, TLC7733QPWREP pinout, TLC7733QPWREP application, or TLC7733QPWREP equivalent, key selection considerations include its precise 2.93 V threshold, 70 mV hysteresis, 16 µA max supply current, and TSSOP-8 packaging with extended temperature qualification for aerospace and defense use.

Technical Context

The TLC7733QPWREP implements a precision voltage-sensing comparator with internal temperature-compensated reference and automatic reset generation. Its sensing path monitors SENSE input against a fixed 2.93 V threshold (VIT+) with 70 mV hysteresis (Vhys) to prevent chatter during brownout conditions.

Reset timing is controlled by an external capacitor CT connected to the CT pin, yielding delay time td = 2.1 × 10⁴ × CT seconds. The CONTROL pin enables active-high RESET behavior when grounded, supporting power-down sequencing for static RAM with battery backup.

Key Specifications

Pinout & Package

TSSOP-8 package (PW), 3.0 mm × 4.4 mm, 1.2 mm max height, lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7733MPWREP and TPS3808G33DBVR, the TLC7733QPWREP uniquely balances extended temperature qualification, dual active-high/low reset outputs, and SRAM power-down capability-making it optimal for aerospace-grade microcontroller systems requiring flexible reset timing and memory retention.

Availability

TLC7733QPWREP is available at Aetrix Electronics and suitable for aerospace avionics, defense electronics, and medical instrumentation requiring stable component supply under extended temperature and long-lifecycle constraints.

Supply support for TLC7733QPWREP 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 high-performance design.

The TLC77xx-EP product line delivers enhanced-plastic, extended-temperature voltage supervisors engineered specifically for defense, aerospace, and medical applications demanding rigorous qualification and long-term supply stability.

FAQ

What is the exact sense threshold voltage of the TLC7733QPWREP?

The TLC7733QPWREP has a fixed sense threshold voltage (VIT+) of 2.93 V, with a typical hysteresis of 70 mV. This value is trimmed during production and specified over the full –40°C to 125°C operating range. It is designed to reliably monitor 3.3 V power rails, asserting reset when the SENSE input falls below 2.93 V and releasing after crossing 3.00 V (2.93 V + 70 mV).

How do I configure the reset delay time for the TLC7733QPWREP?

The reset delay time (td) of the TLC7733QPWREP is set by an external capacitor connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT seconds. For example, a 100 nF capacitor yields ~2.1 s delay. No resistor is needed-the CT pin is internally biased, and the capacitor directly controls the internal timer discharge rate.

Does the TLC7733QPWREP support active-high reset output?

Yes, the TLC7733QPWREP supports active-high reset output via the CONTROL pin. When CONTROL is tied to GND, the RESET pin becomes active-high, while RESET remains active-low. This dual-output architecture enables direct interface with microcontrollers requiring either polarity, and facilitates SRAM power-down control without external inverters.

What is the maximum supply current consumption of the TLC7733QPWREP?

The TLC7733QPWREP draws a maximum supply current (IDD) of 16 µA over the full operating temperature range (–40°C to 125°C) and supply voltage range (2 V to 6 V). During reset delay (td), current rises to 150 µA max, but returns to micropower levels once the delay expires and the system stabilizes.

Is the TLC7733QPWREP pin-compatible with other members of the TLC77xx-EP family?

Yes, the TLC7733QPWREP shares identical pinout, package (TSSOP-8), and functional interface with TLC7701QPWREP and TLC7705QPWREP. All three devices use the same RESIN, CT, CONTROL, GND, VDD, SENSE, RESET, and RESET pin assignments. Only the internal sense threshold differs: 1.1 V (TLC7701), 4.5 V (TLC7705), and 2.93 V (TLC7733).