Texas Instruments TPS3808G33MDBVREP

Overview

TPS3808G33MDBVREP from Texas Instruments is a radiation-hardened, extended-temperature supervisory circuit with fixed 3.3 V reset threshold, 20 ms or 300 ms programmable delay, open-drain RESET output, and 2.4 μA typical quiescent current-designed for reliable power-on reset in space-grade DSP, FPGA, and microcontroller systems operating from –55°C to +125°C.

For engineers reviewing the TPS3808G33MDBVREP datasheet, TPS3808G33MDBVREP pinout, TPS3808G33MDBVREP application, or TPS3808G33MDBVREP equivalent, key selection criteria include its ±0.5% VIT accuracy at 3.3 V, SOT-23 (DBV) 6-pin package, MR input with 90 kΩ internal pullup, CT pin programmability, and guaranteed operation across military/extended temperature range without derating.

Technical Context

The TPS3808G33MDBVREP integrates a precision voltage comparator with 0.5% threshold accuracy, hysteresis (VHYS = 1.0–2.5% of VIT), and an on-chip 220 nA current source for capacitor-based delay timing. It operates over 1.7–6.5 V supply range and asserts open-drain RESET when SENSE falls below 3.3 V or MR is pulled low.

Its functional modes are strictly defined: MR high enables SENSE-triggered reset; MR low forces immediate RESET assertion regardless of SENSE. Delay time is set via CT pin configuration-open (20 ms), connected to VDD via 50 kΩ (300 ms), or tied to ≥100 pF capacitor (1.25 ms–10 s).

Key Specifications

Pinout & Package

SOT-23 (DBV) 6-pin plastic package, 2.90 mm × 1.60 mm body size, 1.45 mm max height, JEDEC MO-178AC compliant, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Compared with TPS3808G33QDBVRQ1 and MAX6369LATA+T, the TPS3808G33MDBVREP uniquely delivers radiation-hardened assurance, full –55°C to +125°C operation, and hardware-selectable delay - making it irreplaceable in mission-critical aerospace and defense systems where component pedigree and environmental margin are non-negotiable.

Availability

TPS3808G33MDBVREP is available at Aetrix Electronics and suitable for spacecraft avionics, nuclear instrumentation, and military radar systems requiring stable component supply across extended temperature and radiation-exposed environments.

Supply support for TPS3808G33MDBVREP 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 operation in demanding environments.

The TPS3808-EP product line was engineered specifically for aerospace, defense, and industrial applications requiring extended temperature operation, enhanced manufacturing pedigree, and DMS mitigation - with TPS3808G33MDBVREP serving as the 3.3 V fixed-threshold variant in this qualified family.

FAQ

What is the exact reset threshold voltage of the TPS3808G33MDBVREP and how accurate is it?

The TPS3808G33MDBVREP has a fixed reset threshold of 3.3 V with ±0.5% accuracy over the full –55°C to +125°C junction temperature range. This specification is guaranteed per TI's SBVS103D datasheet Section 6.5, meaning the actual trip point falls between 3.2835 V and 3.3165 V under all qualified operating conditions - critical for reliable brownout detection in precision 3.3 V systems.

How is the reset delay time configured on the TPS3808G33MDBVREP?

The TPS3808G33MDBVREP supports three hardware-configurable reset delay options: (1) 20 ms default when CT pin is left open; (2) 300 ms when CT is connected to VDD via a 50 kΩ resistor; or (3) user-defined delay from 1.25 ms to 10 s using a ≥100 pF capacitor from CT to GND. The internal 220 nA current source charges the capacitor to 1.23 V to determine timeout - no software or external clock required.

Does the TPS3808G33MDBVREP require an external pullup resistor on the RESET pin?

Yes, the TPS3808G33MDBVREP features an open-drain RESET output and requires an external pullup resistor between RESET and the target supply rail (e.g., 3.3 V or up to 6.5 V). TI specifies 10 kΩ to 1 MΩ as the acceptable range; a 100 kΩ resistor is commonly used to balance speed and power. Without this pullup, RESET cannot achieve a valid high state, preventing proper microprocessor reset signaling.

What is the operating supply voltage range for the TPS3808G33MDBVREP?

The TPS3808G33MDBVREP operates from a supply voltage (VDD) of 1.7 V to 6.5 V, as specified in Section 6.3 of the SBVS103D datasheet. It maintains full functionality-including 3.3 V threshold accuracy, 20/300 ms delay options, and 2.4 μA quiescent current-across this entire range. This wide input range allows use with diverse power architectures, including 2.5 V, 3.3 V, and 5 V rails.

Is the TPS3808G33MDBVREP pin-compatible with other members of the TPS3808-EP family?

Yes, all TPS3808-EP variants-including TPS3808G33MDBVREP, TPS3808G01MDBVTEP, and V62/08607-09XE-share identical SOT-23 (DBV) 6-pin packaging and pinout. Pin functions (RESET, GND, MR, CT, SENSE, VDD) are electrically and physically identical across the family, enabling drop-in replacement for different threshold voltages or delay configurations without PCB redesign.