Texas Instruments TLV809EA46DPWR

Overview

TLV809EA46DPWR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in low-power systems. It features a fixed 4.63 V under-voltage threshold (±0.5% typical accuracy), 200 ms reset time delay, 250 nA typical supply current, and operates across –40°C to +125°C. It is used in battery-powered IoT sensors and industrial PLCs to ensure microcontroller initialization integrity during supply fluctuations.

For engineers reviewing the TLV809EA46DPWR datasheet, TLV809EA46DPWR pinout, TLV809EA46DPWR application, or TLV809EA46DPWR equivalent, key selection criteria include its X2SON-5 (DPW) package footprint, guaranteed reset assertion down to 0.7 V VDD, glitch immunity against <10 µs transients, and compatibility with manual reset (MR) input for system-level fault recovery.

Technical Context

The TLV809EA46DPWR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent chatter near the 4.63 V threshold. Its internal timer enforces a fixed 200 ms release delay after VDD rises above VIT+ = VIT– + VHYS, ensuring stable MCU boot sequencing.

It integrates a manual reset (MR) input-active-low, internally pulled up at 100 kΩ in DPW packages-that overrides automatic supervision and initiates a full reset cycle. The push-pull output drives RESET low without external components and remains valid down to VPOR = 700 mV, enabling robust operation during deep brownouts.

Key Specifications

Pinout & Package

X2SON-5 (DPW) package: 0.8 mm × 0.8 mm, 0.35 mm height, thermal pad (PAD) on bottom for enhanced heat dissipation; pin 1 = RESET, pin 2 = MR, pin 3 = PAD (thermal, optional GND connection), pin 4 = VDD, pin 5 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809K46DBVR and MAX809TRD3+T, the TLV809EA46DPWR delivers lower power consumption (250 nA vs. ≥1 µA), integrated MR functionality, and full automotive-grade temperature support (–40°C to +125°C), making it optimal for high-reliability embedded systems where board area and thermal robustness are critical.

Availability

TLV809EA46DPWR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, and programmable logic controller (PLC) I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV809EA46DPWR 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 power management technologies, with decades of expertise in high-reliability industrial and automotive ICs.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for battery-constrained and thermally demanding applications where precision, ultra-low IQ, and small-footprint packaging are essential.

FAQ

What is the exact reset threshold voltage of the TLV809EA46DPWR?

The TLV809EA46DPWR has a factory-programmed falling threshold voltage (VIT–) of 4.63 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The rising threshold (VIT+) equals VIT– plus hysteresis (typically 1.2% of VIT–), ensuring noise immunity during recovery. TLV809EA46DPWR maintains this specification across its full operating voltage range (0.7 V to 6 V).

Does the TLV809EA46DPWR require an external pull-up resistor on the RESET pin?

No, the TLV809EA46DPWR uses a push-pull output topology, so the RESET pin actively drives both high and low states without needing an external pull-up resistor. This reduces BOM count and PCB area versus open-drain alternatives like the TLV803E. The output can sink up to 2 mA and source up to 4 mA while maintaining specified VOL and VOH levels. TLV809EA46DPWR's push-pull design also improves noise immunity in noisy environments.

What is the function of the MR pin on the TLV809EA46DPWR?

The MR (Manual Reset) pin on TLV809EA46DPWR is an active-low input that forces a reset assertion regardless of VDD level when pulled below VMR_L (≤0.4 V). In the X2SON-5 (DPW) package, it features an internal 100 kΩ pull-up to VDD, allowing it to be left floating when unused. Asserting MR initiates the same 200 ms reset timeout as a VDD undervoltage event. TLV809EA46DPWR uses this for system-level diagnostics, watchdog-triggered recovery, or user-initiated reboots.

Can the TLV809EA46DPWR operate reliably below 1 V supply voltage?

Yes, the TLV809EA46DPWR guarantees defined reset behavior down to VPOR = 700 mV, meaning its output state remains controlled and predictable even during deep brownout or cold-start conditions. Below 700 mV, the output becomes undefined per datasheet specifications. This capability enables safe startup sequencing in multi-rail systems where auxiliary supplies ramp slower than main rails. TLV809EA46DPWR's operation from 0.7 V to 6 V makes it suitable for ultra-low-power architectures.

How does the TLV809EA46DPWR handle short voltage glitches on the VDD pin?

The TLV809EA46DPWR incorporates integrated glitch immunity with a typical rejection window of 10 µs - meaning voltage dips shorter than this duration are ignored by the internal comparator. Glitch rejection depends on overdrive magnitude: higher VDD excursions beyond VIT– require longer pulse widths to trigger reset. This prevents false resets from ESD events, switching noise, or transient coupling. TLV809EA46DPWR's robust glitch filtering is verified across temperature and process corners per Section 7.6 of its datasheet.