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Texas Instruments TPS37A372922DYYRQ1
- Part No.:
- TPS37A372922DYYRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-14 Thin, SOT-23 Variant
- Datasheet:
-
TPS37A372922DYYRQ1.pdf
- Description:
- AUTOMOTIVE 65-V WINDOW SUPERVISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
TPS37A372922DYYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel overvoltage/undervoltage detector with independent SENSE1 (OV) and SENSE2 (UV) monitoring, 1 µA typical quiescent current, 65 V input rating on VDD/SENSE pins, and ±1.5% voltage threshold accuracy across –40°C to +125°C ambient. It enables robust power-rail supervision in telematics control units and emergency call systems.
For engineers reviewing the TPS37A372922DYYRQ1 datasheet, TPS37A372922DYYRQ1 pinout, TPS37A372922DYYRQ1 application, or TPS37A372922DYYRQ1 equivalent, this page delivers verified functional safety-capable specifications, validated WSON/SOT-23 package mapping, confirmed dual-threshold timing behavior, and real-world automotive reset delay configuration guidance.
Technical Context
The TPS37A372922DYYRQ1 implements two independent voltage comparators - one for overvoltage detection on SENSE1 (VITP), one for undervoltage detection on SENSE2 (VITN) - each with programmable hysteresis (2–13% or fixed 0.5–2.5 V). Its internal resistor divider eliminates external components for fixed-threshold variants while supporting external dividers via high-impedance SENSE inputs (≤2 µA max ISENSE).
Reset assertion is controlled by capacitor-programmable CTSx (sense delay) and CTRx (reset delay) pins: CTS1/CCTS2 set 1.28 ms to 1.28 s delay; CTR1/CCTR2 set 12.8 ms to 12.8 s delay. Output topology supports open-drain or push-pull with active-low or active-high logic, and manual reset is implemented via low-active CTR1/MR and CTR2/MR pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7 V to 65 V - supports direct connection to 12 V/24 V automotive battery without external regulators. |
| Quiescent Current | 1 µA typical - enables always-on supervision in low-power ECU sleep modes. |
| Voltage Threshold Accuracy | ±1.5% for 2.7–36 V range; ±0.8% for 800 mV option - ensures precise OV/UV trip points under temperature and aging stress. |
| Hysteresis Options | 2–13% in 1% steps or fixed 0.5/1/1.5/2/2.5 V - rejects cold-crank transients and start-stop voltage dips. |
| Detection Time | 10 µs - fast response to abrupt rail faults before downstream MCU damage occurs. |
| Output Topology | Configurable open-drain or push-pull - eliminates need for external pull-ups in OD mode; supports direct GPIO interface in PP mode. |
| Ambient Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive deployment. |
Pinout & Package
TPS37A372922DYYRQ1 is packaged in a 14-pin SOT-23 (DYY) with 4.1 mm × 1.9 mm body size and wettable flanks for AOI compatibility. The central thermal pad is non-conductive to meet IEC60664 creepage requirements between VDD and GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Input | 2.7–65 V supply input; bypass with 0.1 µF ceramic capacitor to GND for noise immunity. |
| SENSE1 | OV Monitoring Input | Monitors rising voltage for overvoltage fault; asserts RESET1 after CTS1 delay when exceeding VITP. |
| SENSE2 | UV Monitoring Input | Monitors falling voltage for undervoltage fault; asserts RESET2 after CTS2 delay when dropping below VITN. |
| GND | Ground Reference | Two dedicated pins (pins 8 & 13) must be electrically connected to PCB ground plane. |
| RESET1_OV## | Channel 1 Reset Output | Active-low or active-high OV reset signal; ## = OD (open-drain) or PP (push-pull) per variant. |
| RESET2_UVOD | Channel 2 Reset Output | Active-low undervoltage reset output; open-drain only - requires external pull-up for logic-high state. |
| CTR1/MR | Channel 1 Reset Delay & Manual Reset | Capacitor-programmable reset delay (12.8 ms–12.8 s); driven low to force immediate RESET1 assertion. |
| CTR2/MR | Channel 2 Reset Delay & Manual Reset | Capacitor-programmable reset delay (12.8 ms–12.8 s); driven low to force immediate RESET2 assertion. |
| CTS1 | Channel 1 Sense Delay | Capacitor-programmable sense delay (1.28 ms–1.28 s); debounces SENSE1 voltage glitches. |
| CTS2 | Channel 2 Sense Delay | Capacitor-programmable sense delay (1.28 ms–1.28 s); debounces SENSE2 voltage glitches. |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety Capability | Documentation available for ISO 26262 ASIL-B system integration - supports safety case development without latch functionality. |
| 65 V Graded SENSE Pins | SENSE1/SENSE2 tolerate up to 65 V continuously - enables direct battery rail monitoring without external clamping diodes. |
| Programmable Hysteresis | Selectable 2–13% hysteresis or fixed 0.5–2.5 V options - prevents false resets during engine cranking or load-dump events. |
| Low-IQ Supervision | 1 µA typical IDD - reduces standby power in always-on vehicle modules such as eCall and ADAS sensors. |
| Redundant Sensing Architecture | Independent VDD and SENSE pins allow VDD to operate at 2.7 V while SENSE monitors up to 65 V - supports isolated domain supervision. |
Applications
| Telematics Control Unit | Emergency Call System |
|---|---|
Use Scenario: Monitors 12 V battery rail during ignition-off sleep mode to detect brownout or overvoltage conditions. IC Role / Device Role / Timing Role: Dual-channel supervisor asserting RESET2_UVOD on battery sag and RESET1_OV## on load dump. Use Value: Prevents corrupted firmware writes and memory corruption during unstable power transitions. |
Use Scenario: Ensures reliable power-up sequencing and fault recovery in eCall module after airbag deployment. IC Role / Device Role / Timing Role: Generates timed reset pulse via CTR2/MR capacitor to guarantee full MCU reinitialization post-event. Use Value: Meets UNECE R151 functional safety requirement for guaranteed communication channel restoration. |
| Audio Amplifier | Head Unit and Cluster |
Use Scenario: Detects DC offset or rail collapse in Class-D amplifier supply to prevent speaker damage. IC Role / Device Role / Timing Role: Uses SENSE2 UV detection with 100 ms CTR2 delay to ignore brief turn-on transients while catching sustained faults. Use Value: Eliminates need for discrete comparator + RC network, reducing BOM count and layout area by 40%. |
Use Scenario: Supervises multiple voltage rails (5 V, 3.3 V, 1.8 V) using external resistor dividers on SENSE1/SENSE2. IC Role / Device Role / Timing Role: Configured with 800 mV threshold option and 1% hysteresis for highest accuracy on low-voltage domains. Use Value: Achieves ±0.8% threshold accuracy across temperature - tighter than standard 3.3 V LDO tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBVR | Single-channel, 3.3 V fixed threshold, no programmable delay, 36 V max VDD | Limited to single-rail monitoring; lacks UV/OV dual detection and automotive temp grade | Only suitable for non-automotive 3.3 V microcontroller reset where cost is primary constraint |
| MAX6373KA+T | Single-channel, 2.93 V threshold, 140 ms fixed reset timeout, 5.5 V max VDD | No high-voltage capability; no hysteresis programming; not AEC-Q100 qualified | Applicable only in legacy industrial 3.3 V systems with no automotive qualification requirement |
Compared with TLV809E33DBVR and MAX6373KA+T, the TPS37A372922DYYRQ1 provides dual independent OV/UV channels, 65 V operation, AEC-Q100 Grade 1 qualification, and capacitor-programmable delays - enabling consolidated supervision of battery and domain-specific rails in modern automotive ECUs without compromising safety or timing flexibility.
Availability
TPS37A372922DYYRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and head unit and cluster designs requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for TPS37A372922DYYRQ1 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 automotive ICs, with decades of experience delivering high-reliability solutions for safety-critical systems.
The TPS37-Q1 product line was designed specifically for automotive power-rail supervision, addressing cold-crank immunity, battery transient rejection, and functional safety integration in next-generation ECU architectures.
FAQ
What is the maximum voltage rating for SENSE1 and SENSE2 pins on the TPS37A372922DYYRQ1?
The TPS37A372922DYYRQ1 specifies 65 V absolute maximum rating for both SENSE1 and SENSE2 pins, matching the VDD rating. This allows direct connection to 12 V or 24 V automotive battery rails without external voltage clamping, provided external circuitry limits transient voltages to ≤70 V per absolute maximum ratings table.
Does the TPS37A372922DYYRQ1 support both overvoltage and undervoltage detection on the same input pin?
No. The TPS37A372922DYYRQ1 uses dedicated inputs: SENSE1 is configured exclusively for overvoltage (OV) detection relative to VITP, while SENSE2 is configured exclusively for undervoltage (UV) detection relative to VITN. This separation enables independent threshold and hysteresis settings per channel, critical for asymmetric battery fault coverage.
How is the reset time delay programmed on the TPS37A372922DYYRQ1?
The reset time delay for each channel is programmed using external capacitors on CTR1/MR (channel 1) and CTR2/MR (channel 2). With internal RCTR ≈ 1 MΩ, a 10 nF capacitor yields ~12.8 ms delay and 10 µF yields ~12.8 s delay. Leaving the pin floating selects the shortest delay (~100 µs), as specified in the timing requirements section.
What output topologies does the TPS37A372922DYYRQ1 support for RESET1 and RESET2?
RESET1 supports both open-drain (OD) and push-pull (PP) configurations with active-low or active-high logic, selectable at manufacturing. RESET2_UVOD is open-drain active-low only. For OD outputs, an external pull-up resistor is required; PP outputs drive high/low actively and must not use external pull-ups.
Is the TPS37A372922DYYRQ1 qualified for automotive use, and what grade does it meet?
Yes, the TPS37A372922DYYRQ1 is AEC-Q100 qualified as Grade 1, supporting ambient operating temperatures from –40°C to +125°C. It also meets HBM ESD Level 2 (±2 kV) and CDM Level C7B (±750 V), and is documented as functional safety-capable for ISO 26262 system-level integration.
TPS37A372922DYYRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-14 Thin, SOT-23 Variant
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.7V
- Output:
- Open Drain, Open Drain
- Reset:
- Active Low
- Reset Timeout:
- 12.8ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOT-23-THIN
TPS37A372922DYYRQ1 FAQ
1.How can I place an order for TPS37A372922DYYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37A372922DYYRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS37A372922DYYRQ1 reliable?
The price and inventory of TPS37A372922DYYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37A372922DYYRQ1 is usually 5 days.
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Once your TPS37A372922DYYRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS37A372922DYYRQ1?
For technical support, including TPS37A372922DYYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37A372922DYYRQ1 requirements.
6.How does Aetrix verify that TPS37A372922DYYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37A372922DYYRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS37A372922DYYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37A372922DYYRQ1?
All TPS37A372922DYYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37A372922DYYRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS37A372922DYYRQ1 part is unused and in its original packaging.
Return procedure for TPS37A372922DYYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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