Texas Instruments TPS38J010155DSKRQ1

Overview

TPS38J010155DSKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel overvoltage/undervoltage detector with 65 V input rating, 1 μA typical quiescent current, ±1.5% threshold accuracy (2.7–36 V range), and programmable sense/reset delays via external capacitors. It monitors two independent supply rails in telematics control units and emergency call systems.

For engineers reviewing the TPS38J010155DSKRQ1 datasheet, TPS38J010155DSKRQ1 pinout, TPS38J010155DSKRQ1 application, or TPS38J010155DSKRQ1 equivalent, key selection criteria include dual-channel OV/UV detection capability, 65 V SENSE/VDD tolerance, 1% accuracy at 800 mV option, programmable hysteresis (2–13%), and WSON-10 wettable flank package for AOI compatibility.

Technical Context

The TPS38J010155DSKRQ1 implements independent voltage monitoring on SENSE1 and SENSE2 pins, each supporting configurable OV or UV detection with user-selectable thresholds (800 mV or 2.7–36 V) and hysteresis (2–13% or fixed 0.5–2.5 V). Its dual open-drain outputs-RESET1 (configurable push-pull or open-drain) and RESET2 (open-drain only)-enable flexible system reset coordination.

Timing is fully programmable: 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 and 1 MΩ timing resistors respectively. Manual reset is supported via active-low CTR1/MR and CTR2/MR inputs, with logic thresholds defined across full VDD range (1.3–2.5 V).

Key Specifications

Pinout & Package

TPS38J010155DSKRQ1 is housed in a 10-pin WSON package (DSK) with 2.5 mm × 2.5 mm body size and wettable flanks for automated optical inspection. The central thermal pad is non-conductive to meet IEC60664 creepage requirements between VDD and GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS38J010155DSKRQ1, the TPS3808G33QDBVRQ1 offers lower quiescent current but cannot monitor 12 V/24 V battery rails directly, while TLV809EYZTR lacks automotive qualification, dual-channel capability, and programmable timing-making TPS38J010155DSKRQ1 uniquely suited for safety-critical, high-voltage, multi-rail automotive supervision.

Availability

TPS38J010155DSKRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and audio amplifier power management requiring stable component supply across automotive production lifecycles.

Supply support for TPS38J010155DSKRQ1 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 deep expertise in automotive-grade power management and signal chain products.

The TPS38-Q1 product line is engineered specifically for automotive voltage supervision, targeting high-reliability applications including ADAS, infotainment, and safety-critical ECUs where wide-input, low-IQ, and AEC-Q100 compliance are mandatory.

FAQ

What is the exact threshold voltage configuration for TPS38J010155DSKRQ1?

The TPS38J010155DSKRQ1 is configured for 800 mV undervoltage/overvoltage detection on both SENSE1 and SENSE2 inputs, with ±1% maximum accuracy across –40°C to +125°C. This variant bypasses the internal resistor ladder to optimize detection speed and input current (≤100 nA at 800 mV), making it ideal for low-voltage backup supply monitoring in eCall systems.

Does TPS38J010155DSKRQ1 support push-pull output on both channels?

No. TPS38J010155DSKRQ1 supports push-pull or open-drain configuration only on RESET1 (Channel 1); RESET2 (Channel 2) is open-drain only. This architecture allows RESET1 to directly drive MCU reset pins without external pull-ups, while RESET2 remains compatible with wired-OR fault-bus architectures common in distributed automotive systems.

Can TPS38J010155DSKRQ1 monitor voltages higher than its VDD supply?

Yes. TPS38J010155DSKRQ1 allows SENSE1 and SENSE2 pins to operate up to 65 V independently of VDD, which may be as low as 2.7 V. This enables monitoring of high-voltage battery rails while powering the IC from a local 3.3 V LDO - a key feature for redundancy in ASIL-B/C systems where VDD and SENSE paths are physically separated.

What is the minimum capacitor value needed to achieve functional sense delay on TPS38J010155DSKRQ1?

The minimum recommended capacitor for functional sense delay on TPS38J010155DSKRQ1 is 10 nF on CTS1 or CTS2, yielding 1.28 ms nominal delay. Capacitors smaller than 10 nF result in sub-microsecond delays dominated by internal propagation (8–90 µs), which are insufficient to suppress automotive transients like cold-crank or load dump; design guidance specifies ≥10 nF for robust glitch immunity.

Is the thermal pad on the TPS38J010155DSKRQ1 WSON package electrically connected?

No. The thermal pad on the TPS38J010155DSKRQ1 DSK package is non-conductive and internally unconnected. It may be left floating or tied to GND for mechanical stability, but doing so does not improve thermal performance or electrical grounding - its purpose is solely to enhance solder joint inspection via wettable flanks per AOI requirements.