My Inquiry
My Account
Texas Instruments TPS38J010122DSKRQ1
- Part No.:
- TPS38J010122DSKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS38J010122DSKRQ1.pdf
- Description:
- AUTOMOTIVE 65-V DUAL-CHANNEL SUP
- Quantity:
- Payment:
- Shipping:
Inventory:2,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS38J010122DSKRQ1 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 voltage rails in telematics control units and body control modules.
For engineers reviewing the TPS38J010122DSKRQ1 datasheet, TPS38J010122DSKRQ1 pinout, TPS38J010122DSKRQ1 application, or TPS38J010122DSKRQ1 equivalent, this device delivers dual-rail monitoring with 65 V SENSE/VDD tolerance, flexible OV/UV detection per channel, and manual reset capability - critical for automotive power rail supervision where cold-crank transients and system redundancy are design constraints.
Technical Context
The TPS38J010122DSKRQ1 implements independent dual-channel sensing with separate SENSE1/SENSE2 inputs, each supporting configurable OV or UV detection with user-programmable hysteresis (2–13% or fixed 0.5–2.5 V). Its internal reference divider eliminates external resistors for standard thresholds, while high-impedance SENSE pins allow optional external resistor networks for custom 800 mV–36 V thresholds.
Each channel features dedicated CTSx (sense delay) and CTRx/MR (reset delay/manual reset) pins, enabling independent timing control: CTS1/CTS2 set sense assertion delay (1.28 ms to 1.28 s), CTR1/CTR2 set reset deassertion delay (12.8 ms to 12.8 s), and MR functionality forces immediate reset assertion on either channel when driven low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 65 V - supports direct connection to 12 V/24 V automotive battery without level-shifting or external regulators. |
| Threshold Accuracy | ±1.5% (2.7–36 V), ±1% (800 mV) - ensures reliable fault detection across –40°C to +125°C ambient temperature. |
| Quiescent Current | 1 μA typical - enables always-on monitoring in low-power automotive subsystems without compromising battery life. |
| Sense Delay Range | 1.28 ms to 1.28 s (via 10 nF–10 μF capacitor on CTS1/CTS2) - suppresses false triggers from short-duration voltage glitches. |
| Reset Delay Range | 12.8 ms to 12.8 s (via 10 nF–10 μF capacitor on CTR1/CTR2) - provides configurable hold time for controlled system recovery after fault clearance. |
| Output Topology | Channel 1: Open-drain or push-pull; Channel 2: Open-drain - allows flexible interface with MCU reset inputs or logic-level supervisors. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TA) - qualified for under-hood and infotainment applications requiring automotive reliability. |
Pinout & Package
TPS38J010122DSKRQ1 is packaged in a 10-pin WSON (DSK) package with 2.5 mm × 2.5 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 supply input | Accepts 2.7–65 V; bypass with 0.1 µF capacitor to GND; powers internal circuitry independently of SENSE voltages. |
| SENSE1 | Channel 1 monitored voltage input | High-impedance input for OV/UV detection; supports internal divider (2.7–36 V) or external resistor network (down to 800 mV). |
| SENSE2 | Channel 2 monitored voltage input | Independent of SENSE1; identical electrical behavior and configuration options for redundant or multi-rail monitoring. |
| GND | Ground reference | Pin 10; all GND connections must be tied to PCB ground plane for stable operation and ESD path integrity. |
| RESET1 | Channel 1 reset output | Configurable as open-drain (requires external pull-up) or push-pull; asserts on SENSE1 OV/UV fault after CTS1 delay. |
| RESET2 | Channel 2 reset output | Open-drain only; asserts on SENSE2 OV/UV fault after CTS2 delay; requires external pull-up resistor. |
| CTR1/MR | Channel 1 reset delay & manual reset | Capacitor-connected for adjustable reset delay; driven low to force immediate RESET1 assertion; floating = shortest delay. |
| CTR2/MR | Channel 2 reset delay & manual reset | Functionally identical to CTR1/MR but for RESET2; enables independent manual reset per channel. |
| CTS1 | Channel 1 sense delay timing | Capacitor-connected node setting sense assertion delay for RESET1; debounces SENSE1 voltage transients. |
| CTS2 | Channel 2 sense delay timing | Capacitor-connected node setting sense assertion delay for RESET2; provides independent glitch immunity per rail. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent OV/UV channels | Enables simultaneous monitoring of primary and backup rails (e.g., main 12 V and backup VBA) with no shared timing or threshold dependencies. |
| 65 V-rated SENSE and VDD pins | Allows direct connection to automotive battery without external clamping or attenuation, reducing BOM count and board space. |
| Programmable hysteresis (2–13% or fixed) | Prevents chatter during cold-crank (e.g., 5–7 V dips) or start-stop transients by setting appropriate voltage margin above/below threshold. |
| Manual reset (MR) per channel | Supports hardware-initiated system reset via microcontroller GPIO or pushbutton without software intervention - critical for safety-critical recovery. |
| Integrated resistor divider | Eliminates need for external resistors in standard configurations, reducing leakage current and improving long-term accuracy stability. |
Applications
| Telematics Control Unit (TCU) | Emergency Call System (eCall) |
|---|---|
Use Scenario: Monitors 12 V battery rail and 5 V LDO output during vehicle ignition, GPS signal acquisition, and cellular handshaking. IC Role / Device Role / Timing Role: Dual-channel supervisor asserting RESET1 on battery undervoltage (< 9 V) and RESET2 on LDO overvoltage (> 5.5 V) with 10 ms sense delay to ignore cranking noise. Use Value: Prevents firmware corruption during brown-out events and protects RF front-end ICs from overvoltage damage during load dump. |
Use Scenario: Supervises power to GSM module and accelerometer during crash detection and post-impact communication. IC Role / Device Role / Timing Role: Uses MR pin to trigger immediate RESET1 assertion upon airbag ECU signal, forcing full system reboot before eCall transmission. Use Value: Ensures deterministic reset sequence and guaranteed power-rail validity prior to initiating emergency call - meeting UNECE R155 functional safety requirements. |
| Audio Amplifier Power Stage | Body Control Module (BCM) |
Use Scenario: Tracks boost converter output (24 V) and DSP core supply (3.3 V) in Class-D amplifier subsystem. IC Role / Device Role / Timing Role: Configures SENSE1 for 24 V OV detection (26 V threshold) and SENSE2 for 3.3 V UV detection (3.0 V threshold), both with 2% hysteresis. Use Value: Shuts down amplifier stage before MOSFET overvoltage failure and prevents DSP lockup due to undervoltage - eliminating audible pop/click artifacts. |
Use Scenario: Supervises door module MCU supply (5 V), LIN transceiver bias (12 V), and LED driver input (24 V) in centralized BCM architecture. IC Role / Device Role / Timing Role: Assigns RESET1 to 5 V rail (UV only), RESET2 to 12 V rail (OV only), with independent CTS/CTR capacitors for staggered reset sequencing. Use Value: Enables selective subsystem restart (e.g., retain LIN comms while rebooting MCU) - improving diagnostic traceability and reducing wake-up current spikes. |
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 |
|---|---|---|---|
| TPS3808G33QDBVRQ1 | Single-channel, fixed 3.3 V threshold, no SENSE pin - uses VDD as monitored rail; 350 ns propagation delay vs. 10 µs for TPS38J010122DSKRQ1. | Limited to single-rail monitoring; lacks independent SENSE inputs and manual reset; suitable only for simple MCU supply supervision. | Select when cost-sensitive single-rail monitoring suffices and dual-channel redundancy is unnecessary. |
| MAX6326TTUT+T | Single-channel, 3.08 V fixed UV detector; 1.6 µA quiescent current; no OV detection, no programmable delay, no AEC-Q100 qualification. | Not automotive-qualified; no overvoltage protection; no timing flexibility - restricted to industrial/commercial low-voltage systems. | Choose only for non-automotive 3.3 V systems where AEC-Q100 and dual-channel capability are irrelevant. |
Compared with TPS3808G33QDBVRQ1 and MAX6326TTUT+T, the TPS38J010122DSKRQ1 uniquely supports dual independent rails, 65 V tolerance, programmable OV/UV per channel, and AEC-Q100 Grade 1 compliance - making it the only option for safety-critical automotive multi-rail supervision requiring redundancy and transient resilience.
Availability
TPS38J010122DSKRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for TPS38J010122DSKRQ1 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-grade power management solutions with decades of automotive qualification expertise.
The TPS38-Q1 product line was designed specifically for automotive power rail supervision, addressing cold-crank resilience, dual-rail redundancy, and functional safety requirements in ADAS, infotainment, and body electronics.
FAQ
What is the maximum continuous voltage rating for SENSE1 and SENSE2 pins on the TPS38J010122DSKRQ1?
The SENSE1 and SENSE2 pins on the TPS38J010122DSKRQ1 are rated for continuous operation up to 65 V, matching the VDD absolute maximum rating. This allows direct connection to automotive battery rails without external voltage dividers or clamping circuits, provided external protection limits transients to ≤70 V per absolute maximum ratings.
Does the TPS38J010122DSKRQ1 support both overvoltage and undervoltage detection on the same channel?
Yes, the TPS38J010122DSKRQ1 supports configurable OV or UV detection per channel via device nomenclature and internal configuration. Each SENSE input can be independently set for either overvoltage (e.g., SENSE1 > VITP) or undervoltage (e.g., SENSE2 < VITN) response, with hysteresis applied accordingly - confirmed in the Functional Block Diagram and Section 8.3.3 of the datasheet.
How is the reset time delay programmed on the TPS38J010122DSKRQ1?
The reset time delay 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 10 μF. Leaving the pin floating selects the minimum delay (~100 µs), as specified in Table 7-6.
Can the TPS38J010122DSKRQ1 monitor voltage rails higher than its VDD supply voltage?
Yes, the TPS38J010122DSKRQ1 supports independent VDD and SENSE voltage domains. VDD may be supplied at 2.7 V (e.g., from a local LDO) while SENSE1 and SENSE2 monitor up to 65 V rails - a key feature enabling low-power always-on supervision of high-voltage battery lines without level-shifting circuitry.
Is the TPS38J010122DSKRQ1 pin-compatible with other variants in the TPS38-Q1 family?
No, the TPS38J010122DSKRQ1 is not pin-compatible with other TPS38-Q1 variants such as those in the DYY (14-pin SOT-23) package. It uses the 10-pin WSON (DSK) footprint exclusively, with distinct pin assignments including NC pads and dedicated CTS/CTR routing - verified in Figure 6-1 and Table 6-1 of the datasheet.
TPS38J010122DSKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.8V, 0.8V
- Output:
- Open Drain, Open Drain
- Reset:
- Active Low
- Reset Timeout:
- 12.8s Maximum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (2.5x2.5)
TPS38J010122DSKRQ1 FAQ
1.How can I place an order for TPS38J010122DSKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS38J010122DSKRQ1 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 TPS38J010122DSKRQ1 reliable?
The price and inventory of TPS38J010122DSKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS38J010122DSKRQ1 is usually 5 days.
3.What payment methods are accepted for TPS38J010122DSKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS38J010122DSKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS38J010122DSKRQ1?
TPS38J010122DSKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS38J010122DSKRQ1 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 TPS38J010122DSKRQ1?
For technical support, including TPS38J010122DSKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS38J010122DSKRQ1 requirements.
6.How does Aetrix verify that TPS38J010122DSKRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS38J010122DSKRQ1 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 TPS38J010122DSKRQ1 meets industry standards.
7.What is the process for return or replacement of TPS38J010122DSKRQ1?
All TPS38J010122DSKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS38J010122DSKRQ1, 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 TPS38J010122DSKRQ1 part is unused and in its original packaging.
Return procedure for TPS38J010122DSKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS38J010122DSKRQ1 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
