Texas Instruments TPS3307-18MDREP

Overview

TPS3307-18MDREP from Texas Instruments is a triple-voltage supervisory IC for DSP and processor-based systems, monitoring 3.3 V, 1.8 V, and user-adjustable supply rails with fixed 200 ms power-on reset delay, 40 µA supply current, and operation from −55°C to 125°C in SOIC-8 package. It delivers precise reset assertion during power-up and brownout events in military-grade embedded control.

For engineers reviewing the TPS3307-18MDREP datasheet, TPS3307-18MDREP pinout, TPS3307-18MDREP application, or TPS3307-18MDREP equivalent, this page provides verified specifications, thermal-rated package details, triple-threshold supervision logic, manual reset interface behavior, and qualified alternatives for high-reliability system initialization design.

Technical Context

The TPS3307-18MDREP integrates three independent voltage comparators with temperature-compensated 1.25 V reference, enabling simultaneous monitoring of 3.3 V (2.93 V threshold), 1.8 V (1.68 V threshold), and adjustable rail (>1.25 V) via external resistor divider. Its internal timer initiates a fixed 200 ms reset timeout only after all SENSE inputs exceed their respective VIT+ thresholds.

It features dual active-reset outputs (RESET and RESET), manual reset (MR) input with hysteresis, and operates across 2 V–6 V supply range while maintaining defined reset assertion down to VDD ≥ 1.1 V. The device uses no external capacitor for reset timing and supports robust ESD protection (2000 V HBM, 200 V MM).

Key Specifications

Pinout & Package

TPS3307-18MDREP is housed in an 8-pin SOIC (D) package, 3.9 mm × 4.9 mm, 1.75 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1, with exposed pad not present (standard SOIC). Pin 1 index area located at top-left corner per JEDEC MS-012AA.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-supply supervisory applications.

Compared with TPS3307-33MDGNREP, the TPS3307-18MDREP offers optimized thresholds for 3.3 V/1.8 V systems and SOIC packaging for legacy board compatibility; versus TPS3823-01DBVR, it delivers full triple-rail coverage and dual-output flexibility essential for complex processor initialization.

Availability

TPS3307-18MDREP is available at Aetrix Electronics and suitable for military avionics, industrial programmable controllers, and aerospace telemetry systems requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TPS3307-18MDREP 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 specializing in analog, embedded processing, and high-reliability components, with decades of heritage in aerospace, defense, and industrial markets.

The TPS3307-xx family was designed specifically for triple-rail power supervision in DSP and processor-based systems demanding extended temperature operation, low quiescent current, and deterministic reset timing-targeting mission-critical embedded control.

FAQ

What is the minimum VDD voltage at which TPS3307-18MDREP asserts RESET?

The TPS3307-18MDREP asserts RESET when VDD rises above 1.1 V, ensuring early reset activation during power-up before internal circuitry becomes fully operational. This behavior is guaranteed across the full −55°C to 125°C temperature range and is independent of SENSE input states. The 1.1 V threshold enables reliable initialization even with weak or slowly ramping supplies, and is explicitly specified in the absolute maximum and recommended operating conditions tables of the official datasheet.

Does TPS3307-18MDREP require an external capacitor for its 200 ms reset delay?

No, the TPS3307-18MDREP implements a fixed 200 ms reset delay using an internal oscillator and timer-no external capacitor is required. This eliminates timing variation due to capacitor tolerance, aging, or temperature drift, and reduces bill-of-materials count and PCB footprint. The delay starts only after all three SENSE inputs exceed their respective VIT+ thresholds, ensuring coordinated system readiness before release.

Can TPS3307-18MDREP monitor a 2.5 V supply rail?

Yes, TPS3307-18MDREP can monitor a 2.5 V rail using the SENSE3 input with an external resistor divider. Since SENSE3's internal reference is 1.25 V, a 2:1 divider (e.g., two equal 1% resistors) scales 2.5 V down to 1.25 V, matching the threshold. The datasheet confirms SENSE3 accepts any voltage >1.25 V and specifies adjustment via external divider-making it suitable for 2.5 V, 2.048 V, or other non-standard rails.

What is the function of the dual RESET outputs on TPS3307-18MDREP?

The TPS3307-18MDREP provides both active-low RESET (open-drain) and active-high RESET (push-pull) outputs to interface natively with diverse host processors and logic families. RESET directly drives standard CMOS/TTL inputs without pull-up, while RESET eliminates external inverters in systems requiring active-high reset signals-reducing component count and improving signal integrity in noise-sensitive applications.

Is TPS3307-18MDREP qualified for space-level or radiation-hardened applications?

The TPS3307-18MDREP is not radiation-hardened or QML-V qualified, but it is an enhanced-product (EP) grade device with Controlled Baseline, extended temperature (−55°C to 125°C), and qualification per JEDEC standards including HAST, temperature cycling, and electromigration. It meets military screening requirements for Class V (space-qualified derivatives exist under different part numbering, e.g., V62/03629-01XE), but TPS3307-18MDREP itself is rated for high-reliability terrestrial and airborne systems-not deep-space missions.