Texas Instruments TPS3896PDRYR

Overview

TPS3896PDRYR 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 FPGA, microcontroller, and ASIC enable circuits.

For engineers reviewing the TPS3896PDRYR datasheet, TPS3896PDRYR pinout, TPS3896PDRYR application, or TPS3896PDRYR equivalent, key selection considerations include its active-low ENABLE logic, push-pull SENSE_OUT output (no pullup required), 0.2-µs enable-to-output propagation delay, 1.7–6.5 V operating range, and USON-6 (1.45 mm × 1.00 mm) package - all critical for space-constrained, low-power embedded reset management.

Technical Context

The TPS3896PDRYR implements a precision comparator with 0.5 V internal reference and 5 mV hysteresis to detect SENSE voltage exceeding V_IT+. Its ENABLE pin is active-low and forces immediate SENSE_OUT assertion (low) when driven high, independent of SENSE state. The CT pin enables user-defined delay via external capacitor, with timing governed by a 310 nA internal current source charging to 1.24 V.

Unlike A-versions, the P-version uses fixed 0.2-µs enable-to-output delay instead of capacitor-adjustable delay on ENABLE, while retaining capacitor-adjustable delay for SENSE rising-edge assertion. Output deassertion occurs within 16 µs after SENSE falls below (V_IT+ – V_hys) or ENABLE goes low - enabling fast fault response without delay penalties.

Key Specifications

Pinout & Package

TPS3896PDRYR 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 TPS3896ADRBR, TPS3896PDRYR delivers faster, deterministic ENABLE control (0.2 µs vs. up to 190 ms), reducing sequencing uncertainty. Against MAX6896TTA+T, it provides half the quiescent current, twice the threshold accuracy, and flexible delay tuning - making it superior for precision, low-power, and space-constrained designs.

Availability

TPS3896PDRYR is available at Aetrix Electronics and suitable for FPGA configuration enable, microcontroller power-on reset, and ASIC supply monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3896PDRYR 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 and embedded processing solutions, with decades of expertise in precision power management and supervisory IC design.

The TPS389x family was developed specifically for ultra-compact, low-power voltage monitoring in space-constrained and thermally demanding applications - emphasizing small footprint, high accuracy, and flexible delay control without sacrificing reliability.

FAQ

What is the function of the CT pin on the TPS3896PDRYR?

The CT pin on the TPS3896PDRYR sets the delay time between SENSE rising above 0.5 V and SENSE_OUT assertion. An external capacitor from CT to GND determines the delay: t_pd(r) = [C_CT (µF) × 4] + 40 µs. With CT open, delay is 40 µs; with 47 nF, it is ~190 ms. This pin does not affect ENABLE-to-output timing, which remains fixed at 0.2 µs in the TPS3896PDRYR.

Does the TPS3896PDRYR require an external pullup resistor on SENSE_OUT?

No, the TPS3896PDRYR features a push-pull output on SENSE_OUT, so no external pullup resistor is required. The output actively drives high (to VCC) or low (to GND), simplifying layout and eliminating pullup-related leakage current - a key advantage over open-drain alternatives like the TPS3898PDRYR.

What is the minimum detectable input voltage for the TPS3896PDRYR?

The TPS3896PDRYR has a fixed 0.5 V internal threshold (V_IT+), but it can monitor any supply ≥500 mV using an external resistor divider on the SENSE pin. For example, to monitor a 3.3 V rail, use R1/R2 = 5.6 to set V_SENSE = 0.5 V when V_IN = 3.3 V. Input current into SENSE is ≤15 nA, minimizing divider power loss.

How does the ENABLE pin logic work on the TPS3896PDRYR?

The ENABLE pin on the TPS3896PDRYR is active-low: driving ENABLE high forces SENSE_OUT low immediately, regardless of SENSE voltage. Driving ENABLE low allows SENSE monitoring to control SENSE_OUT - which then goes low only after SENSE exceeds 0.5 V and the CT-set delay elapses. This enables hardware-based system-level reset override.

Is the TPS3896PDRYR compatible with 1.8 V logic systems?

Yes, the TPS3896PDRYR supports 1.7 V to 6.5 V operation and accepts ENABLE logic levels as low as 0.4 V (V_IL) and as high as 1.4 V (V_IH). A 1.8 V system can directly drive ENABLE, and SENSE_OUT will swing rail-to-rail between GND and VCC (1.8 V), ensuring full logic compatibility without level-shifting.