Texas Instruments TPS3896PDRYT

Overview

TPS3896PDRYT from Texas Instruments is a single-channel, adjustable-voltage supervisory circuit with active-low enable and push-pull output, designed for precise power-rail monitoring in space-constrained systems. It features 0.5 V threshold (adjustable via external resistor divider), ±1% threshold accuracy over –40°C to 125°C, 0.2 µs enable-to-output propagation delay, and operates from 1.7 V to 6.5 V supply. Used for reset assertion in microcontroller-based power sequencing.

For engineers reviewing the TPS3896PDRYT datasheet, TPS3896PDRYT pinout, TPS3896PDRYT application, or TPS3896PDRYT equivalent, key selection criteria include its active-low ENABLE logic, push-pull SENSE_OUT output (no pull-up required), ultra-small USON-6 (1.45 mm × 1.00 mm) footprint, capacitor-adjustable delay capability, and guaranteed operation across automotive-grade temperature range.

Technical Context

The TPS3896PDRYT implements a precision voltage comparator with 5 mV hysteresis and internal 0.5 V reference, enabling user-defined thresholds ≥500 mV via external resistor divider. Its active-low ENABLE pin directly controls output assertion without delay-SENSE_OUT transitions low within 200 ns of ENABLE going high when SENSE > V_IT+.

It uses an internal 310 nA CT pin current source to charge an external capacitor for adjustable delay timing (tpd(r) = [C_CT (µF) × 4] + 40 µs), while maintaining 6 µA typical quiescent current. The push-pull output drives logic-high at V_CC level and sinks up to 1 mA with VOL ≤ 0.4 V at V_CC ≥ 4.5 V.

Key Specifications

Pinout & Package

TPS3896PDRYT is housed in a 6-pin USON package (1.45 mm × 1.00 mm, 0.5 mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3896ADRBT and MAX6896TTA+T, the TPS3896PDRYT provides the lowest quiescent current, tightest threshold accuracy, and fastest enable response-making it optimal for battery-sensitive, high-reliability, and space-constrained applications requiring deterministic reset timing.

Availability

TPS3896PDRYT is available at Aetrix Electronics and suitable for microcontroller power sequencing, FPGA configuration monitoring, battery-powered sensor nodes, and industrial PLC I/O modules requiring stable component supply with guaranteed long-term availability.

Supply support for TPS3896PDRYT 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 with emphasis on reliability, efficiency, and design simplicity.

The TPS389x family was developed specifically for ultra-compact, low-power voltage supervision in portable, automotive, and industrial systems-prioritizing small size, precision thresholding, and flexible enable control.

FAQ

What is the function of the CT pin on the TPS3896PDRYT?

The CT pin on the TPS3896PDRYT connects to an external capacitor to set the delay time between SENSE rising above the 0.5 V threshold and SENSE_OUT assertion. With no capacitor (open), delay is 40 µs; with a 0.047 µF capacitor, delay extends to ~190 ms. The internal 310 nA current source charges the capacitor to 1.24 V to trigger output assertion. This allows precise, user-defined reset timeout without additional components.

Does the TPS3896PDRYT require an external pull-up resistor on SENSE_OUT?

No, the TPS3896PDRYT does not require an external pull-up resistor on SENSE_OUT because it features a push-pull output stage. Unlike open-drain variants (e.g., TPS3897/8), the TPS3896PDRYT actively drives both high (at V_CC level) and low (near GND). This eliminates BOM cost and PCB area associated with pull-up resistors and ensures clean, rail-to-rail logic transitions compatible with standard CMOS inputs.

How is the voltage threshold adjusted on the TPS3896PDRYT?

The TPS3896PDRYT uses an internal 0.5 V reference and comparator. To monitor voltages above 0.5 V-such as 3.3 V or 5 V-the SENSE pin is connected to a resistor divider from the target rail to GND. The threshold voltage is calculated as V_TARGET = (1 + R1/R2) × 0.5 V. For example, to monitor 3.3 V, use R1 = 560 kΩ and R2 = 100 kΩ. Input bias current is <15 nA, enabling high-value resistors to minimize power loss.

What is the maximum voltage the TPS3896PDRYT can monitor on the SENSE pin?

The TPS3896PDRYT SENSE pin supports input voltages up to 6.5 V, matching its V_CC maximum rating. When monitoring rails above V_CC (e.g., 5 V rail with 3.3 V V_CC), the resistor divider must ensure the voltage at SENSE never exceeds V_CC + 0.3 V (per absolute max ratings). For 5 V rail supervision with 3.3 V supply, a 2:1 divider (R1 = 170 kΩ, R2 = 100 kΩ) yields 2.94 V at SENSE-well within safe operating limits.

Is the TPS3896PDRYT suitable for automotive applications?

Yes, the TPS3896PDRYT is qualified for operation from –40°C to 125°C and specified across this full junction temperature range. Its ±1% threshold accuracy, 5 mV hysteresis, and robust ESD performance (±2000 V HBM) meet requirements for automotive body electronics and infotainment power supervision. While not AEC-Q200 certified out-of-box, its electrical and thermal specifications align with common Tier-1 supplier expectations for non-safety-critical monitoring functions.