Texas Instruments TPS3896ADRYR

Overview

TPS3896ADRYR from Texas Instruments is an ultra-small, single-channel, adjustable voltage supervisor IC with active-low enable and push-pull output. It monitors supply rails ≥500 mV using an external resistor divider, provides 1% threshold accuracy over –40°C to 125°C, supports capacitor-adjustable delay (40 µs to 190 ms), and draws only 6 µA typical quiescent current. It is used for power-on reset and supply monitoring in space-constrained embedded systems.

For engineers reviewing the TPS3896ADRYR datasheet, TPS3896ADRYR pinout, TPS3896ADRYR application, or TPS3896ADRYR equivalent, key selection criteria include its active-low ENABLE logic, push-pull SENSE_OUT output rated to VCC, 0.5 V internal reference enabling user-defined thresholds down to 500 mV, and USON-6 (1.45 mm × 1.00 mm) package for high-density PCB layouts.

Technical Context

The TPS3896ADRYR implements a precision comparator with 0.5 V internal reference and 5 mV hysteresis to detect rising/falling SENSE voltage relative to VIT+. Its CT pin integrates a 310 nA current source charging an external capacitor to generate programmable delay - tpd(r) = [CCT (µF) × 4] + 40 µs - with no internal timing components required.

It operates across 1.7 V–6.5 V supply range and features active-low ENABLE that forces SENSE_OUT low immediately upon assertion, independent of SENSE state. The push-pull output drives high to VCC and low to ≤0.3 V at 0.5 mA sink, eliminating need for external pull-up resistors while ensuring clean logic-level compatibility with downstream processors.

Key Specifications

Pinout & Package

TPS3896ADRYR is housed in a 6-pin USON (DRY) package measuring 1.45 mm × 1.00 mm × 0.5 mm, optimized for ultra-dense PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3896PDRYR, the TPS3896ADRYR offers design flexibility through programmable delay but trades off nanosecond-level enable responsiveness. Against MAX6896TTA+T, it delivers superior accuracy, lower power, smaller size, and field-tunable timing - making it optimal for new compact, low-power, and thermally demanding designs.

Availability

TPS3896ADRYR is available at Aetrix Electronics and suitable for microcontroller reset, FPGA configuration monitoring, battery-powered sensor nodes, and industrial PLC I/O modules requiring stable component supply and long-term manufacturability.

Supply support for TPS3896ADRYR 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 for industrial, automotive, and personal electronics markets.

The TPS389x family was designed specifically for space-constrained, low-power supervisory applications - delivering ultra-small packaging, sub-1% threshold accuracy, and capacitor-adjustable timing in a single integrated solution.

FAQ

What is the function of the CT pin on the TPS3896ADRYR?

The CT pin on the TPS3896ADRYR connects to an external capacitor to set the reset delay time. An internal 310 nA current source charges the capacitor to 1.24 V; delay = [CCT (µF) × 4] + 40 µs. Leaving CT open yields a fixed 40 µs delay. This enables precise, field-adjustable timeout without trimming resistors or firmware changes - a key advantage of the TPS3896ADRYR over fixed-delay supervisors.

Does the TPS3896ADRYR require external pull-up resistors on SENSE_OUT?

No, the TPS3896ADRYR does not require external pull-up resistors on SENSE_OUT because it features a push-pull output stage. The output actively drives high to VCC and low to ≤0.3 V at 0.5 mA sink current. This eliminates external components, reduces BOM count, and ensures robust logic-level compatibility with MCU/FPGA reset inputs - a distinguishing feature of the TPS3896ADRYR versus open-drain alternatives like TPS3898ADRYR.

Can the TPS3896ADRYR monitor a 1.2 V supply rail?

Yes, the TPS3896ADRYR can monitor a 1.2 V supply rail using an external resistor divider on the SENSE pin. With its 0.5 V internal reference and 1% accuracy, the target threshold is calculated as VTARGET = (1 + R1/R2) × 0.5 V. For 1.2 V monitoring, a ratio of R1/R2 = 1.4 achieves exact threshold - enabling accurate, scalable supervision of common logic rails without dedicated fixed-threshold ICs.

What is the minimum operating voltage for the TPS3896ADRYR?

The TPS3896ADRYR has a minimum operating voltage of 1.7 V, as specified in its Recommended Operating Conditions. Below this, the internal reference and comparator may not function reliably. Its power-on reset (POR) voltage is 0.8 V, but output behavior is undefined below 1.7 V. This makes the TPS3896ADRYR suitable for modern low-voltage systems (1.8 V, 2.5 V, 3.3 V) but not for sub-1.7 V energy-harvesting rails without regulation.

How does the active-low ENABLE pin affect reset behavior in the TPS3896ADRYR?

The active-low ENABLE pin on the TPS3896ADRYR forces SENSE_OUT low immediately when driven high, overriding SENSE state - enabling external controllers to assert system-wide reset on demand. When ENABLE is low and SENSE exceeds 0.5 V, SENSE_OUT goes high after the CT-programmed delay. This dual-control architecture allows both autonomous power-on reset and synchronous software-triggered reset - a core functional distinction of the TPS3896ADRYR within the TPS389x family.