Texas Instruments TPS3898PDRYR

Overview

TPS3898PDRYR from Texas Instruments is an ultra-small, active-low enable, open-drain voltage supervisor IC designed for precise power-rail monitoring in space-constrained systems. It features a 500 mV adjustable threshold (±1% over temperature), capacitor-programmable delay (40 µs to 190 ms), 6 µA typical quiescent current, and operates from 1.7 V to 6.5 V supply - used to assert reset or enable signals for FPGAs, microcontrollers, and PMICs during power-up/power-down sequencing.

For engineers reviewing the TPS3898PDRYR datasheet, TPS3898PDRYR pinout, TPS3898PDRYR application, or TPS3898PDRYR equivalent, key selection criteria include its active-low ENABLE logic, open-drain SENSE_OUT rated to 18 V, 0.2-µs enable-to-output propagation delay (P-version), –40°C to 125°C operation, and USON-6 (1.45 mm × 1.00 mm) package - critical for battery-powered and automotive-grade embedded designs requiring low-power, high-accuracy supervision.

Technical Context

The TPS3898PDRYR implements a precision comparator with 5 mV hysteresis and 1% threshold accuracy across –40°C to 125°C, enabling stable detection of voltage faults on rails ≥500 mV. Its CT pin integrates a 310 nA current source charging an external capacitor to generate a user-defined delay before output assertion.

Unlike A-versions, the P-variant uses fixed 0.2-µs ENABLE-to-SENSE_OUT delay when ENABLE is asserted, eliminating capacitor dependency for enable timing - while retaining full capacitor-adjustability for SENSE rising-edge delay. The open-drain output supports level-shifting up to 18 V independent of VCC, allowing interface with higher-voltage logic or regulators.

Key Specifications

Pinout & Package

TPS3898PDRYR is housed in a 6-pin USON (DRY) package measuring 1.45 mm × 1.00 mm × 0.5 mm, optimized for high-density PCB layouts in portable and automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3898ADRBR and MAX6898TTA+T, the TPS3898PDRYR delivers the tightest threshold accuracy (1%), lowest quiescent current (6 µA), and fastest enable response (0.2 µs), making it optimal for high-reliability, low-power, and timing-critical embedded supervision - especially where board space and thermal budget are constrained.

Availability

TPS3898PDRYR is available at Aetrix Electronics and suitable for FPGA configuration supervision, automotive body control modules, battery-powered real-time clocks, and processor power sequencing requiring stable component supply and guaranteed long-term manufacturability.

Supply support for TPS3898PDRYR 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 supervisory circuits for automotive, industrial, and computing markets.

The TPS389x family was engineered specifically for ultra-compact, low-power voltage monitoring in next-generation portable, automotive, and FPGA-based systems - prioritizing precision thresholding, flexible timing, and minimal footprint without sacrificing robustness.

FAQ

What is the function of the CT pin on the TPS3898PDRYR?

The CT pin on the TPS3898PDRYR sets the delay time between SENSE voltage crossing the 500 mV threshold and SENSE_OUT assertion. A capacitor connected from CT to GND determines the delay per t_pd(r) = [C_CT(µF) × 4] + 40 µs. Leaving CT open yields a fixed 40 µs delay. This pin does not affect ENABLE-to-output timing, which remains 0.2 µs in the P-version. The TPS3898PDRYR uses this for precise power-up sequencing control.

Does the TPS3898PDRYR support monitoring of a 1.2 V supply rail?

Yes, the TPS3898PDRYR supports monitoring of a 1.2 V supply rail using an external resistor divider on the SENSE pin. With its 500 mV base threshold and ±1% accuracy, a 1.2 V rail can be scaled to exactly 500 mV using R1/R2 = 1.4 - for example, R1 = 140 kΩ and R2 = 100 kΩ. The 5 mV hysteresis ensures noise immunity, and the 6 µA quiescent current minimizes loading on the monitored rail. This configuration is explicitly validated in TI's SLVA450 application note for the TPS3898PDRYR.

What is the maximum voltage that can be applied to the SENSE_OUT pin of the TPS3898PDRYR?

The SENSE_OUT pin of the TPS3898PDRYR is rated for up to 18 V when configured as an open-drain output - independent of the VCC supply voltage (1.7 V to 6.5 V). This allows direct interface with higher-voltage logic families or regulators without level shifters. However, a pull-up resistor must be used, and its value must ensure sink current stays within the 1 mA absolute maximum rating - e.g., ≥18 kΩ for 18 V pull-up with ≤1 mA sink. This 18 V rating is specified in Section 7.1 Absolute Maximum Ratings of the TPS3898PDRYR datasheet.

How does the ENABLE pin logic work on the TPS3898PDRYR?

The ENABLE pin on the TPS3898PDRYR is active-low: SENSE_OUT is only allowed to assert low when ENABLE is pulled low *and* SENSE exceeds 500 mV. If ENABLE is high, SENSE_OUT remains high (open-drain, so pulled up externally) regardless of SENSE voltage. When ENABLE transitions from high to low, SENSE_OUT responds within 0.2 µs - a fixed, capacitor-independent delay unique to the P-version. This behavior is defined in Table 2 (TPS3896/8 Truth Table) of the TPS3898PDRYR datasheet.

Is the TPS3898PDRYR suitable for automotive applications?

Yes, the TPS3898PDRYR is qualified for automotive applications with operation across –40°C to 125°C junction temperature and AEC-Q100 stress testing alignment. Its 18 V-tolerant SENSE_OUT supports interface with 12 V automotive subsystems, and its 1% threshold accuracy ensures reliable detection of rail faults under wide temperature and voltage variation. TI documents its use in body control modules and infotainment power domains - confirming suitability for under-hood and cabin environments where the TPS3898PDRYR meets stringent reliability requirements.