Texas Instruments TLC7733MJGB

Overview

TLC7733MJGB from Texas Instruments is a military-grade micropower supply voltage supervisor IC with fixed 2.93 V negative-going threshold, DRB-compatible CDIP-8 package, –55°C to 125°C operating range, and programmable reset delay via external capacitor. It provides power-on reset, undervoltage supervision, and power-down control for static RAM with battery backup in ruggedized embedded systems.

For engineers reviewing the TLC7733MJGB datasheet, TLC7733MJGB pinout, TLC7733MJGB application, or TLC7733MJGB equivalent, this page delivers verified specifications, military-qualified thermal and electrical behavior, pin-level functional roles, real-world use cases in medical imaging and avionics, and two validated alternative parts with documented differences.

Technical Context

The TLC7733MJGB implements a precision bandgap-based voltage reference with temperature compensation, enabling stable 2.93 V threshold detection across –55°C to 125°C. Its internal timer generates a user-programmable reset delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above threshold.

It features dual active-low and active-high RESET outputs, CONTROL input for RAM power-down logic, RESIN for manual reset assertion, and defined output states down to VDD ≥1 V. The device draws only 9–16 µA quiescent current and supports 2–6 V supply operation.

Key Specifications

Pinout & Package

Package: Ceramic Dual-In-Line Package (CDIP), 8-pin, non-hermetic, military-grade (JG suffix), lead finish SNPB, RoHS-exempt, MSL N/A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX691ACPP+ and TPS3823MPW, the TLC7733MJGB uniquely combines military temperature qualification, dual complementary reset outputs, and hardware-controlled SRAM disable - making it irreplaceable in safety-critical, battery-backed, high-reliability applications where environmental robustness and deterministic power-down are mandatory.

Availability

TLC7733MJGB is available at Aetrix Electronics and suitable for medical imaging subsystems, avionics flight computers, and downhole telemetry requiring stable component supply across extended temperature extremes and long product lifecycles.

Supply support for TLC7733MJGB 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/military qualification.

The TLC77xx family was designed specifically for high-reliability power supervision in aerospace, defense, and medical equipment - prioritizing precision threshold stability, ultra-low power, and seamless integration with battery-backed memory systems.

FAQ

What is the exact threshold voltage tolerance of the TLC7733MJGB over its full temperature range?

The TLC7733MJGB has a guaranteed negative-going SENSE threshold of 2.93 V with ±3% variation over –55°C to 125°C, as confirmed in the Electrical Characteristics table for the TLC77xxM grade. This includes hysteresis of 70 mV, resulting in a total window of 2.86 V to 3.10 V for reliable release and reassertion. The TLC7733MJGB achieves this via laser-trimmed internal resistor networks and temperature-compensated bandgap design.

Does the TLC7733MJGB support active-high reset output without external components?

Yes, the TLC7733MJGB provides a true active-high RESET output (pin 7) alongside the active-low RESET (pin 6). Both outputs are internally generated and fully buffered - no external pull-ups, inverters, or level shifters are needed. The active-high output sources/sinks ±2 mA and transitions within 5–24 µs, enabling direct connection to microcontrollers or FPGAs requiring high-true reset signaling.

How is the reset delay time calculated for the TLC7733MJGB, and what capacitor value yields a 10 ms delay?

The reset delay time td is calculated as td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. To achieve 10 ms (0.01 s), solve: CT = 0.01 / 21000 ≈ 476 nF. A standard 470 nF ceramic capacitor yields td ≈ 9.9 ms. The TLC7733MJGB's delay is monotonic and stable across temperature due to matched internal RC timing elements - no calibration required.

Can the TLC7733MJGB be used to supervise a 5 V rail while powering from a separate 3.3 V supply?

No - the TLC7733MJGB does not support split-supply operation. VDD powers all internal circuitry including the SENSE comparator and outputs; therefore, SENSE voltage must be referenced to the same VDD rail. To supervise a 5 V rail with a 3.3 V system supply, use a resistive divider to scale the 5 V signal to ≤3.3 V before applying it to SENSE, ensuring the divided voltage remains within the 0–VDD input range and meets VIH/VIL thresholds.

Is the TLC7733MJGB pin-compatible with other members of the TLC77xx family in the same CDIP-8 package?

Yes - all TLC77xx devices in the CDIP-8 (JG) package, including TLC7733MJGB, TLC7705MJGB, and TLC7725MJGB, share identical pinout, footprint, and terminal functions. Only the threshold voltage differs between variants (2.93 V, 4.55 V, and 2.25 V respectively); all timing, drive strength, and control logic remain functionally identical. This allows drop-in replacement during design iteration or voltage rail changes.