Texas Instruments TPS3307-33MDGNREP

Overview

TPS3307-33MDGNREP from Texas Instruments is a triple-voltage supervisory IC for DSP and processor-based systems, monitoring 5 V, 3.3 V, and adjustable supply rails with threshold voltages of 4.55 V, 2.93 V, and 1.25 V respectively; features 200 ms power-on reset delay, 40 µA max supply current, and operation from −55°C to 125°C in an 8-pin HVSSOP package.

For engineers reviewing the TPS3307-33MDGNREP datasheet, TPS3307-33MDGNREP pinout, TPS3307-33MDGNREP application, or TPS3307-33MDGNREP equivalent, this page delivers verified specifications, validated pin functions, military-grade temperature performance, and direct alternative part comparisons for high-reliability embedded system design.

Technical Context

The TPS3307-33MDGNREP integrates three independent voltage comparators with a precision 1.25 V reference, hysteresis (3–80 mV depending on threshold), and internal 200 ms reset timer. It asserts active-low RESET when any SENSE input falls below its negative-going threshold (VIT−) or when VDD rises above 1.1 V at power-up.

It supports manual reset via MR pin, provides both active-low and active-high RESET outputs, and operates across 2 V to 6 V supply range. Input thresholds are temperature-compensated, with typical drift <±0.5% over −55°C to 125°C, enabling stable supervision in harsh environments.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3 mm × 3 mm, 0.65 mm pitch, 1.1 mm max height, exposed thermal pad for enhanced thermal performance in high-reliability PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-33MDGNREP, the SOIC-packaged TPS3307-33MDREP offers identical functionality with higher thermal resistance, while TPS3823-33DBVR trades one monitored rail and extended temperature support for significantly lower quiescent current - making it unsuitable as a drop-in replacement but viable for cost- or power-sensitive dual-rail designs.

Availability

TPS3307-33MDGNREP is available at Aetrix Electronics and suitable for military avionics, industrial programmable controllers, and aerospace test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3307-33MDGNREP 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 space-qualified and military-grade IC design.

The TPS3307 family was engineered specifically for robust power supervision in multi-rail DSP and microprocessor systems deployed in extreme environments - emphasizing extended temperature operation, controlled manufacturing, and qualification pedigree.

FAQ

What is the minimum VDD required to assert RESET in TPS3307-33MDGNREP?

The TPS3307-33MDGNREP asserts RESET when VDD rises above 1.1 V during power-up - this is the power-up reset voltage threshold. Below 1.1 V, the device remains in reset and does not monitor SENSE inputs. This behavior is specified in the Electrical Characteristics table under "Power-up reset voltage" and ensures reliable initialization even with slow-ramping supplies.

Can TPS3307-33MDGNREP monitor a 2.5 V supply on SENSE3?

Yes, TPS3307-33MDGNREP can monitor a 2.5 V supply on SENSE3 using an external resistor divider to scale the input down to its 1.25 V threshold. The datasheet explicitly states that SENSE3 is adjustable for any supply >1.25 V, and Figure 1 shows a 2.5 V rail monitored via resistor network. No additional components beyond the divider are required.

Does TPS3307-33MDGNREP require an external capacitor for the 200 ms reset delay?

No, the TPS3307-33MDGNREP integrates a fixed 200 ms reset delay timer internally - no external capacitor is needed. This is confirmed in the description ("Power-On Reset Generator With Fixed Delay Time of 200 ms, No External Capacitor Needed") and eliminates timing component variation, PCB area, and reliability concerns associated with discrete RC networks.

What is the purpose of the exposed thermal pad on the TPS3307-33MDGNREP HVSSOP package?

The exposed thermal pad on the TPS3307-33MDGNREP's HVSSOP-8 (DGN) package serves as a primary thermal conduction path to the PCB, reducing junction-to-ambient thermal resistance to 58.4°C/W. TI's package documentation recommends connecting it to a solid ground plane via multiple vias to maximize heat dissipation - critical for sustained operation at 125°C ambient.

Is TPS3307-33MDGNREP pin-compatible with other devices in the TPS3307 family?

Yes, all TPS3307-x variants (including TPS3307-18, TPS3307-33, and TPS3307-50) share identical 8-pin HVSSOP (DGN) and SOIC (D) footprints and pinouts. The SENSE1/SENSE2 thresholds differ by variant, but pin assignment, RESET/MR logic, and electrical interface remain fully compatible - enabling drop-in replacement within the same package type.