Texas Instruments TPS3895ADRYR

Overview

TPS3895ADRYR from Texas Instruments is a single-channel, adjustable-voltage supervisory circuit in a 1.45 mm × 1.00 mm USON-6 package, featuring a 500 mV minimum sense threshold, 1% threshold accuracy over –40°C to 125°C, capacitor-adjustable delay (40 µs to 190 ms), and push-pull output rated for 6.5 V supply. It monitors power rails in microcontroller reset circuits where precise timing and low quiescent current (6 µA typical) are critical.

For engineers reviewing the TPS3895ADRYR datasheet, TPS3895ADRYR pinout, TPS3895ADRYR application, or TPS3895ADRYR equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in FPGA/CPU enable sequencing, and two confirmed alternative parts with documented functional and interface differences.

Technical Context

The TPS3895ADRYR implements a precision comparator with built-in 5 mV hysteresis and a 310 nA CT-pin current source to charge an external capacitor for user-defined delay timing. Its active-high ENABLE pin directly controls SENSE_OUT assertion after delay, while SENSE input accepts voltages ≥0.5 V via resistor divider for customizable threshold setting.

It operates across 1.7–6.5 V supply range with undervoltage lockout at 1.3–1.7 V and power-on reset at 0.8 V. The push-pull output drives logic-high reset/enable signals without external pullups, and propagation delay from SENSE rise to SENSE_OUT assertion is programmable from 40 µs (CT open) to 190 ms (CT = 0.047 µF).

Key Specifications

Pinout & Package

TPS3895ADRYR uses a 6-pin USON (DRY) package measuring 1.45 mm × 1.00 mm × 0.5 mm, optimized for space-constrained portable and embedded applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3895PDRYR and MAX6895TTA+T, the TPS3895ADRYR uniquely provides capacitor-adjustable delay (40 µs–190 ms) while maintaining lowest quiescent current (6 µA) and ±1% threshold accuracy - making it optimal for new designs requiring timing precision and ultra-low power.

Availability

TPS3895ADRYR is available at Aetrix Electronics and suitable for microcontroller reset circuits, FPGA configuration enable, battery-powered sensor nodes, multi-rail DSP systems, and industrial embedded controllers requiring stable component supply and guaranteed long-term availability.

Supply support for TPS3895ADRYR 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 ICs, with decades of expertise in high-reliability supervisory and power-management solutions.

The TPS389x product line was designed specifically for space-constrained, low-power systems requiring precise, adjustable voltage monitoring and reset timing - targeting portable electronics, automotive ECUs, and industrial edge devices.

FAQ

What is the minimum sense voltage threshold supported by the TPS3895ADRYR?

The TPS3895ADRYR has a fixed internal sense threshold of 0.5 V (min 0.495 V, max 0.505 V), enabling monitoring of any rail ≥0.5 V using an external resistor divider. This allows customization for thresholds like 1.2 V (R1/R2 = 1.4) or 3.3 V (R1/R2 = 5.6) without external references. The TPS3895ADRYR achieves this with 1% accuracy across –40°C to 125°C.

How does the CT pin configure delay time in the TPS3895ADRYR?

The CT pin on the TPS3895ADRYR connects to an external capacitor to ground; a precision 310 nA internal current source charges it to 1.24 V, determining delay. Delay = [C_CT (µF) × 4] + 40 µs - e.g., 0.01 µF yields 80 µs, 0.047 µF yields 190 ms. Leaving CT open gives 40 µs minimum. Ceramic capacitors are recommended to minimize leakage error.

Does the TPS3895ADRYR require external pullup resistors on its SENSE_OUT pin?

No, the TPS3895ADRYR features a push-pull output that actively drives both high and low states, eliminating the need for external pullup resistors. Its SENSE_OUT pin sources current up to 0.5 mA at 0.8×V_CC and sinks up to 1 mA at 0.4 V, making it directly compatible with standard 3.3 V or 5 V logic inputs without additional components.

What is the operating temperature range specified for the TPS3895ADRYR?

The TPS3895ADRYR is fully specified over an industrial temperature range of –40°C to 125°C junction temperature. All key parameters - including 0.5 V threshold accuracy (±1%), 6 µA quiescent current, and 5 mV hysteresis - are guaranteed across this range, qualifying it for under-hood automotive, factory automation, and outdoor telecom equipment.

How does the ENABLE pin function in the TPS3895ADRYR?

The ENABLE pin on the TPS3895ADRYR is active-high: driving it high enables SENSE_OUT assertion after the CT-configured delay when SENSE > 0.5 V; driving it low forces immediate SENSE_OUT low regardless of SENSE voltage. It accepts logic levels ≥1.4 V (VIH) and ≤0.4 V (VIL), supporting direct interfacing with 1.8 V, 3.3 V, or 5 V GPIOs without level shifters.