Texas Instruments TPS37F010122DSKR

Overview

TPS37F010122DSKR from Texas Instruments is a dual-channel overvoltage and undervoltage supervisor IC with independent SENSE1 (OV monitor) and SENSE2 (UV monitor), 2.7 V to 65 V supply range, 1 µA typical quiescent current, programmable sense/reset delays via external capacitors, and 65 V-rated SENSE/RESET pins. It enables robust rail monitoring in industrial servo drive power stages and functional safety modules.

For engineers reviewing the TPS37F010122DSKR datasheet, TPS37F010122DSKR pinout, TPS37F010122DSKR application, or TPS37F010122DSKR equivalent, key selection criteria include dual OV/UV detection per channel, ±1.5% threshold accuracy across –40°C to +125°C, 2%–13% programmable hysteresis, open-drain/push-pull output topology options, and WSON-10 (DSK) package compatibility with IEC60664 creepage requirements.

Technical Context

The TPS37F010122DSKR implements two independent high-voltage comparators with internal precision reference and integrated resistor dividers-enabling direct 12 V/24 V rail monitoring without external resistors. SENSE1 and SENSE2 operate decoupled from VDD, allowing SENSE pins to monitor voltages higher or lower than VDD.

It features capacitor-programmable timing: CTS1/CTS2 set sense delay (1.28 ms to 1.28 s), CTR1/CTR2 set reset delay (12.8 ms to 12.8 s), and both CTR pins double as manual reset inputs. Built-in hysteresis prevents false triggering on noisy rails, with fixed (0.5–2.5 V) or percentage-based (2–13%) options.

Key Specifications

Pinout & Package

TPS37F010122DSKR is packaged in a 10-pin WSON (DSK) with 2.5 mm × 2.5 mm body size and non-conductive thermal pad for enhanced creepage per IEC60664 between VDD and GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel overvoltage and undervoltage detection applications.

Compared with TPS3700DSCR and TLV809EADBZR, the TPS37F010122DSKR delivers true dual-rail window supervision in one WSON-10 package, eliminating inter-device timing skew, reducing PCB footprint by 40%, and enabling coordinated OV/UV response with shared delay components - critical for functional safety and compact industrial designs.

Availability

TPS37F010122DSKR is available at Aetrix Electronics and suitable for industrial servo drives, PLC CPU modules, and HVAC actuator control requiring stable component supply with extended temperature support and functional safety documentation.

Supply support for TPS37F010122DSKR 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 high-reliability power management solutions for industrial, automotive, and communications markets.

The TPS37 family is designed for high-voltage, low-quiescent-current supervision in factory automation, motor drives, and building control systems - emphasizing rail independence, programmable timing, and IEC60664-compliant isolation.

FAQ

What is the operating temperature range for the TPS37F010122DSKR?

The TPS37F010122DSKR operates across an ambient temperature range of –40°C to +125°C, validated per its recommended operating conditions. This range supports deployment in demanding industrial environments such as servo drive power stages and HVAC actuators where thermal extremes are common. All electrical characteristics-including threshold accuracy, quiescent current, and timing parameters-are specified over this full range. The device's thermal metrics (e.g., RθJA = 87.4°C/W for DSK package) further confirm suitability for convection-cooled PCB layouts without forced airflow.

Does the TPS37F010122DSKR require external resistors for standard 24 V rail monitoring?

No, the TPS37F010122DSKR does not require external resistors for standard 24 V rail monitoring. It integrates precision resistor dividers optimized for common industrial supply voltages, enabling direct connection of SENSE1 and SENSE2 to 12 V or 24 V rails. This eliminates BOM cost, layout area, and leakage-induced accuracy drift associated with discrete dividers. External resistors are supported only for custom thresholds (e.g., 800 mV option), where lower input current and faster detection are prioritized.

How are the reset delay and sense delay configured on the TPS37F010122DSKR?

The TPS37F010122DSKR uses external capacitors on CTR1/CTR2 (reset delay) and CTS1/CTS2 (sense delay) pins to configure timing. For example, a 10 nF capacitor yields 12.8 ms reset delay and 1.28 ms sense delay; scaling to 10 µF extends both to 12.8 s and 1.28 s respectively. Internal timing resistors (RCTR ≈ 1 MΩ, RCTS ≈ 100 kΩ) define the linear relationship. Capacitors must be grounded, ceramic, and placed close to the pins for stability. No external resistors or clocks are needed - simplifying design versus RC or timer-based alternatives.

What output topologies does the TPS37F010122DSKR support?

The TPS37F010122DSKR supports both open-drain and push-pull output topologies for RESET1_OVOD and RESET2_UVOD, selectable at purchase via part number suffix. Open-drain outputs require an external pull-up resistor for logic-level translation and wired-OR capability; push-pull outputs drive high/low actively without external components. Both topologies support active-low or active-high logic polarity, enabling direct interface with MCU reset inputs, FPGA configuration pins, or gate driver enable signals without level shifters.

Is the TPS37F010122DSKR suitable for functional safety–certified systems?

Yes, the TPS37F010122DSKR is functional safety–capable, with documentation available to support system-level design per ISO 26262 (ASIL-B) and IEC 61508 (SIL-2). Its dual independent channels, predictable timing behavior, failure mode and effects analysis (FMEA) data, and diagnostic coverage guidance enable integration into safety-critical subsystems like servo drive functional safety modules. However, final certification depends on system-level implementation - TI provides the foundational evidence, but end-equipment validation remains the responsibility of the integrator.