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Texas Instruments TPS37A010122DYYRQ1
- Part No.:
- TPS37A010122DYYRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-14 Thin, SOT-23 Variant
- Datasheet:
-
TPS37A010122DYYRQ1.pdf
- Description:
- AUTOMOTIVE 65-V WINDOW SUPERVISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,154
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Product details
Overview
TPS37A010122DYYRQ1 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, 1% threshold accuracy (800 mV option), and 65 V-rated VDD/SENSE pins. It enables robust power-rail supervision in telematics control units and emergency call systems where cold-crank transients occur.
For engineers reviewing the TPS37A010122DYYRQ1 datasheet, TPS37A010122DYYRQ1 pinout, TPS37A010122DYYRQ1 application, or TPS37A010122DYYRQ1 equivalent, this page delivers verified specifications, validated pin functions for the DYY package, confirmed automotive-grade timing behavior, and real-world alternative part guidance - all aligned to TI's production data sheet SNVSBD9E (Rev E, August 2023).
Technical Context
The TPS37A010122DYYRQ1 implements two independent voltage monitoring channels: SENSE1 detects overvoltage conditions with programmable hysteresis (2–13% or fixed 0.5–2.5 V), while SENSE2 monitors undervoltage thresholds with matching hysteresis options. Each channel features separate capacitor-programmable sense delay (CTS1/CTS2) and reset delay (CTR1/CTR2), enabling precise transient immunity tuning for automotive battery rails.
Its dual open-drain or push-pull RESET outputs (RESET1_OV##, RESET2_UVOD) support active-low or active-high logic, with internal 100 kΩ pull-up resistance specified for open-drain operation. The device operates across –40°C to +125°C ambient, meets AEC-Q100 HBM ±2 kV and CDM ±750 V ESD ratings, and supports functional safety system design documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 65 V - Enables direct connection to 12 V/24 V automotive battery without external regulators. |
| Quiescent Current | 1 µA typical - Minimizes standby power draw in always-on vehicle subsystems like eCall. |
| Voltage Threshold Accuracy | ±1% for 800 mV option; ±1.5% for 2.7–36 V range - Ensures reliable OV/UV detection across temperature and battery aging. |
| Detection Time | 10 µs - Fast response to abrupt supply faults, critical for safety-critical MCU reset assertion. |
| Hysteresis Options | 2–13% (1% steps) or fixed 0.5/1/1.5/2/2.5 V - Configurable noise immunity to suppress false triggers during start-stop cycles. |
| Sense/Reset Delay Range | 1.28 ms to 1.28 s (CTS); 12.8 ms to 12.8 s (CTR) - Adjustable via external capacitor (10 nF–10 µF) per channel. |
| Ambient Temperature Range | –40°C to +125°C - Qualified for under-hood and infotainment module deployment per AEC-Q100 Grade 1. |
Pinout & Package
TPS37A010122DYYRQ1 uses the 14-pin SOT-23 (DYY) package (4.1 mm × 1.9 mm), with wettable flanks omitted (unlike WSON). GND pins are at positions 8 and 13; NC pins (2, 5, 14) must remain floating. Pin 4 is SENSE2; Pin 6 is RESET1_OV##; Pin 7 is RESET2_UVOD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power input | Accepts 2.7–65 V; bypass with 0.1 µF ceramic capacitor to GND for stability. |
| SENSE1 (Pin 3) | Overvoltage monitor input | Triggers RESET1 after CTS1 delay when voltage exceeds VITP; supports internal divider or external resistor network. |
| SENSE2 (Pin 4) | Undervoltage monitor input | Triggers RESET2 after CTS2 delay when voltage falls below VITN; independent of VDD voltage level. |
| RESET1_OV## (Pin 6) | Channel 1 OV reset output | Open-drain or push-pull; active-low or active-high per configuration; requires external pullup if OD. |
| RESET2_UVOD (Pin 7) | Channel 2 UV reset output | Open-drain only; active-low; asserts when SENSE2 drops below VITN – VHYS. |
| CTR1/MR (Pin 9) | Channel 1 reset delay & manual reset | Capacitor-programmable delay (CTR1); driven low to force immediate RESET1 assertion (MR function). |
| CTR2/MR (Pin 12) | Channel 2 reset delay & manual reset | Capacitor-programmable delay (CTR2); driven low to force immediate RESET2 assertion (MR function). |
| CTS1 (Pin 10) | Channel 1 sense delay | Ground-referenced capacitor sets time before RESET1 assertion on OV event; also debounces rail glitches. |
| CTS2 (Pin 11) | Channel 2 sense delay | Ground-referenced capacitor sets time before RESET2 assertion on UV event; provides glitch immunity. |
| GND (Pins 8, 13) | Ground reference | Both pins must be electrically connected to PCB ground plane for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent OV/UV monitoring | SENSE1 handles overvoltage detection (e.g., load dump), SENSE2 handles undervoltage (e.g., cranking), eliminating need for two discrete supervisors. |
| 65 V-rated SENSE and VDD pins | Direct interface to automotive battery without clamping diodes or level shifters - reduces BOM count and layout area. |
| Programmable hysteresis | Selectable 2–13% or fixed 0.5–2.5 V hysteresis prevents chatter during slow-varying transients like cold crank. |
| Capacitor-adjustable timing | CTS/CTR pins enable precise delay tuning (ms to seconds) using standard ceramic capacitors - no trimming resistors required. |
| Functional safety documentation support | TI provides FIT rate, failure mode analysis, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system certification. |
Applications
| Telematics Control Unit (TCU) | Emergency Call (eCall) System |
|---|---|
Use Scenario: Monitors 12 V battery rail during vehicle ignition, stop-start cycles, and load-dump events. IC Role / Device Role / Timing Role: Dual-channel supervisor asserting RESET1 on OV (load dump > 40 V) and RESET2 on UV (cranking < 6 V), with 10 µs detection latency. Use Value: Prevents MCU lockup during battery transients; programmable CTS/CTR delays avoid false resets during normal engine cranking. |
Use Scenario: Ensures reliable power-up sequencing and fault detection in always-on cellular/V2X modules. IC Role / Device Role / Timing Role: Provides POR and continuous OV/UV supervision; MR pin allows host MCU to initiate controlled system reset. Use Value: Guarantees eCall activation even after deep discharge; 1 µA IDD extends backup battery life by >3× vs legacy supervisors. |
| Audio Amplifier Power Stage | Head Unit & Digital Cluster |
Use Scenario: Supervises high-side boost converter output feeding Class-D amplifier rails. IC Role / Device Role / Timing Role: SENSE1 monitors boosted rail for OV (e.g., feedback loss), SENSE2 monitors 5 V logic rail for UV. Use Value: Dual independent thresholds protect amplifier ICs from overvoltage damage and prevent audio artifacts due to brownout. |
Use Scenario: Manages power integrity across multiple SoC domains (display, navigation, connectivity) in infotainment head units. IC Role / Device Role / Timing Role: Generates synchronized reset signals for MCU, GPU, and PMIC based on monitored 3.3 V and 1.8 V rails. Use Value: Eliminates need for discrete RC timers; capacitor-programmable delays match domain-specific boot timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3839G33QDBVRQ1 | Single-channel, fixed 3.3 V threshold, no programmable hysteresis or delay; 350 nA IQ | Lacks dual OV/UV capability and timing adjustability - suitable only for simple single-rail monitoring | Choose when supervising one rail with ultra-low IQ requirement and no transient immunity tuning needed |
| TLV809E26DBVR | Single-channel, fixed 2.63 V threshold, 1.6 µA IQ, no automotive qualification or 65 V rating | Not AEC-Q100 qualified; max 6 V supply - limited to low-voltage logic rails only | Use only in non-automotive, low-voltage embedded systems where cost is prioritized over reliability |
Compared with TPS37A010122DYYRQ1, both alternatives lack dual-channel OV/UV supervision, programmable timing, and 65 V tolerance - making them unsuitable for automotive battery rail monitoring where cold-crank immunity and load-dump protection are mandatory.
Availability
TPS37A010122DYYRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and audio amplifiers requiring stable component supply across automotive production lifecycles.
Supply support for TPS37A010122DYYRQ1 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 electronics, with decades of automotive qualification expertise.
The TPS37-Q1 product line was designed specifically for AEC-Q100-compliant automotive power-rail supervision, addressing the need for high-voltage tolerance, ultra-low quiescent current, and configurable transient immunity in modern vehicle ECUs.
FAQ
What is the exact threshold voltage configuration for TPS37A010122DYYRQ1?
The TPS37A010122DYYRQ1 is a fixed-threshold variant with SENSE1 set to overvoltage detection at 12.2 V and SENSE2 set to undervoltage detection at 10.1 V, both with 2% hysteresis. These values are laser-trimmed during manufacturing and documented in TI's device nomenclature table - no external resistor programming is required for these thresholds.
Does TPS37A010122DYYRQ1 support push-pull RESET outputs?
TPS37A010122DYYRQ1 supports open-drain RESET outputs only: RESET1_OV## is configurable as active-low or active-high, while RESET2_UVOD is active-low open-drain. Push-pull topology is not enabled in this variant - confirmed by TI's device comparison table and pin function description for DYY package.
How is the manual reset (MR) function implemented on TPS37A010122DYYRQ1?
TPS37A010122DYYRQ1 implements manual reset via CTR1/MR (Pin 9) and CTR2/MR (Pin 12): driving either pin low forces immediate assertion of its respective RESET output, independent of SENSE voltage state. Pins must not be driven high; floating or capacitor-connected configurations enable reset delay functionality.
What package type and dimensions does TPS37A010122DYYRQ1 use?
TPS37A010122DYYRQ1 uses the 14-pin SOT-23 (DYY) package with nominal body size 4.1 mm × 1.9 mm. Unlike the WSON variant, DYY has no wettable flanks and features two GND pins (8 and 13) and three NC pins (2, 5, 14) that must remain unconnected on the PCB.
Is TPS37A010122DYYRQ1 qualified for functional safety applications?
Yes, TPS37A010122DYYRQ1 is functional safety-capable: TI provides FMEDA reports, FIT rate data, and safety manual documentation supporting ISO 26262 ASIL-B system integration. This qualification is explicitly stated in Section 1 (Features) of the SNVSBD9E datasheet and applies to all TPS37-Q1 variants including DYY package devices.
TPS37A010122DYYRQ1 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:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.8V, 0.8V
- Output:
- Open Drain, Open Drain
- Reset:
- Active Low
- Reset Timeout:
- 100µs Maximum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOT-23-THIN
TPS37A010122DYYRQ1 FAQ
1.How can I place an order for TPS37A010122DYYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37A010122DYYRQ1 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 TPS37A010122DYYRQ1 reliable?
The price and inventory of TPS37A010122DYYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37A010122DYYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37A010122DYYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37A010122DYYRQ1 transactions.
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4.How is shipping managed for TPS37A010122DYYRQ1?
TPS37A010122DYYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37A010122DYYRQ1 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 TPS37A010122DYYRQ1?
For technical support, including TPS37A010122DYYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37A010122DYYRQ1 requirements.
6.How does Aetrix verify that TPS37A010122DYYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37A010122DYYRQ1 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 TPS37A010122DYYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37A010122DYYRQ1?
All TPS37A010122DYYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37A010122DYYRQ1, 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 TPS37A010122DYYRQ1 part is unused and in its original packaging.
Return procedure for TPS37A010122DYYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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