TPS3838E18DBVR

TPS3838E18DBVR is TI’s ultra-low-power fixed-threshold voltage supervisor (reset generator) for 1.8‑V rails. It monitors Vcc and asserts an active-low reset when the supply falls below about 1.8 V, with built‑in hysteresis for clean release. The part has a single open-drain reset output (RESET#) that requires a pull-up resistor; no external components are needed. Quiescent current is in the microamp range, making it ideal for battery-powered designs. It provides power-on reset and brown-out protection to ensure a MCU/SoC/FPGA starts in a known state. The E18 suffix indicates a fixed 1.8‑V threshold, and DBV/DBVR denote the package (SOT‑23‑5) and reel packaging. Typical operating input range is about 1.65–5.5 V, so it can run from a 1.8‑V supply or a higher rail as long as above threshold. Applications: MCU/SoC/FPGA reset control on 1.8‑V systems.

Equivalent 1.8 V reset supervisors (fixed-threshold voltage detectors) from other vendors include:
- Maxim MAX809/MAX810 family (1.8 V variants)
- Analog Devices ADM803/ADM803A (1.8 V)
- Microchip MCP131/MCP132 series (1.8 V)
- Rohm BD9xxx or equivalent 1.8 V reset supervisors
Note: always verify reset delay, input/output behavior, pinout, and package to match TPS3838E18DBVR.

Here are the key features of TPS3838E18DBVR:
- Fixed 1.8 V reset threshold (E18)
- Ultra-low quiescent current (typical ~2 µA)
- Power-on reset ensures MCU starts in a known state
- Manual reset input (MR) to force a reset
- Reset output is active-low and suitable for direct MCU drive
- Debounced/reset release aligned to VCC ramp
- 6-pin SOT-23 package (DBVR) with RoHS compliance
- Extended temperature range: -40 °C to 125 °C
Note: For exact electrical specs (tolerances, timing, and voltage ranges), refer to the TPS3838E18DBVR datasheet.

- Pin count and package: 8 pins in the DBV (VSSOP‑8) package.
- Function: TPS3838E18DBVR is a voltage supervisor/reset IC with a 1.8 V threshold. It monitors VCC and drives a reset output to the MCU on power-up/power-down and under undervoltage conditions (RESET output is active).

- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is an American multinational semiconductor company that designs and manufactures integrated circuits and related products, specializing in analog, power management, and embedded processing solutions.

TPS3838E18DBVR is a 1.8-V supply voltage supervisor with a reset output. Typical applications include:
- Monitoring 1.8-V rails and generating clean MCU/processor resets
- Power-on reset and brown-out detection for digital ICs
- Deterministic reset for FPGAs/CPLDs and ASICs
- Battery-powered/portable devices (IoT sensors, wearables)
- Safe startup sequencing in mixed-voltage systems
- System monitoring and fault protection in consumer electronics
These ensure proper startup, operation, and recovery in 1.8-V digital circuits.

SOT-23-3 (3-pin) surface-mount package; VR indicates tape-and-reel packaging.