Texas Instruments TPS37E010122DSKR

Overview

TPS37E010122DSKR from Texas Instruments is a dual-channel overvoltage and undervoltage (OV/UV) supervisor IC designed for high-reliability industrial power monitoring. It features independent 65 V-rated SENSE1 (OV monitor) and SENSE2 (UV monitor), 1 µA typical quiescent current, programmable sense/reset delays via external capacitors, and operates across –40°C to +125°C in factory automation and servo drive power stages.

For engineers reviewing the TPS37E010122DSKR datasheet, TPS37E010122DSKR pinout, TPS37E010122DSKR application, or TPS37E010122DSKR equivalent, this device delivers precise window supervision with configurable hysteresis, manual reset capability, and dual open-drain/push-pull outputs - critical for functional safety–compliant PLC controllers and HVAC actuator systems.

Technical Context

The TPS37E010122DSKR implements two independent voltage comparators with internal precision reference and integrated resistor dividers, enabling direct monitoring of 12 V/24 V rails without external resistors. Its SENSE pins are decoupled from VDD, allowing SENSE1/SENSE2 to monitor voltages higher or lower than VDD - a key redundancy feature for safety-critical systems.

Each channel supports programmable timing: CTS1/CTS2 set sense delay (1.28 ms to 1.28 s), while CTR1/CTR2 set reset delay (12.8 ms to 12.8 s); both use internal 100 kΩ (CTS) and 1 MΩ (CTR) timing resistors. The device includes built-in hysteresis (2%–13% or fixed 0.5–2.5 V options) and supports active-low or active-high output logic per channel.

Key Specifications

Pinout & Package

TPS37E010122DSKR 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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS37E010122DSKR, the TPS3851G30QDGNRQ1 offers automotive qualification but sacrifices 65 V monitoring and programmable timing, while the MAX6816EUT+T provides faster response at the cost of single-channel operation and narrow voltage range - making TPS37E010122DSKR uniquely suited for industrial dual-rail supervision with field-configurable delays.

Availability

TPS37E010122DSKR is available at Aetrix Electronics and suitable for analog input modules, PLC controllers, and servo drive power stage designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEMs.

Supply support for TPS37E010122DSKR 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 industrial and automotive IC expertise.

The TPS37 family was engineered specifically for high-voltage, low-power window supervision in factory automation, motor drives, and building control systems - emphasizing rail independence, functional safety readiness, and noise-immune timing.

FAQ

What is the maximum voltage rating for SENSE1 and SENSE2 pins on the TPS37E010122DSKR?

The SENSE1 and SENSE2 pins on the TPS37E010122DSKR are rated for continuous operation up to 65 V, matching the VDD absolute maximum rating. This allows direct monitoring of high-voltage rails such as 48 V DC buses or 60 V industrial supplies without external clamping, provided external circuitry limits voltage to ≤70 V per absolute maximum ratings.

Does the TPS37E010122DSKR support both overvoltage and undervoltage detection on the same input pin?

No, the TPS37E010122DSKR does not perform combined OV/UV detection on a single pin. It uses dedicated inputs: SENSE1 is configured exclusively for overvoltage monitoring (RESET1 assertion on V_SENSE1 > V_IT+), and SENSE2 is configured exclusively for undervoltage monitoring (RESET2 assertion on V_SENSE2 < V_IT−). This dual-pin architecture enables true window supervision with independent thresholds and timing.

How is the reset delay time programmed on the TPS37E010122DSKR?

The reset delay time for each channel is programmed using an external capacitor on the CTR1/MR (channel 1) or CTR2/MR (channel 2) pin. With an internal 1 MΩ timing resistor, a 10 nF capacitor yields ~12.8 ms delay, scaling linearly to ~12.8 s with a 10 µF capacitor. Leaving the pin floating selects the minimum delay (~100 µs).

Can the TPS37E010122DSKR operate with VDD and SENSE voltages at different levels?

Yes, the TPS37E010122DSKR supports independent VDD and SENSE voltage levels: VDD may be as low as 2.7 V while SENSE1 or SENSE2 monitor up to 65 V. This decoupling enables power-efficient operation - for example, powering the IC from a 3.3 V auxiliary rail while supervising a 48 V main bus - a key redundancy feature for high-reliability systems.

What output topologies does the TPS37E010122DSKR support for RESET1 and RESET2?

The TPS37E010122DSKR 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 and support wired-OR configurations; push-pull outputs drive actively high/low without external components and provide faster rise/fall times - critical for tight-timing safety loops.