PTPS3840DL42DBVRQ1 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
PTPS3840DL42DBVRQ1 is an automotive-grade high-input-voltage supervisor with manual reset input and programmable reset time delay in a 5-pin SOT-23 package. It monitors a single supply rail and asserts a reset signal during undervoltage conditions, supporting AEC-Q100 automotive applications from -40°C to +125°C.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- PTPS3840DL42DBVRQ1 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-input-voltage supervisor supporting automotive battery rail monitoring
- Programmable reset time delay via external capacitor
- Manual reset input for external forced-reset capability
- Active-low reset output with open-drain configuration
- Single-channel voltage monitoring with fixed threshold detection
- 5-pin SOT-23 surface-mount package for space-constrained automotive modules
- AEC-Q100 automotive grade Q1 qualification
- Operating temperature range -40°C to +125°C
Applications
PTPS3840DL42DBVRQ1 supervises microcontroller and processor power supply rails in automotive body control modules, ADAS domain controllers, and infotainment systems where reliable reset timing is critical during power-up and power-down sequences. The programmable reset delay allows designers to match specific microcontroller startup requirements, preventing false resets during supply voltage ramp events on 3.3 V and 5 V automotive logic rails. Its manual reset input also supports hardware watchdog and service-mode reset functions in automotive ECUs without additional discrete circuitry.
Specifications
| Date Of Intro | 2019-05-02 |
| YTEOL | 0 |
| Additional Feature | BAT BUP SW:N;MNL RST:Y;OV DET:N;PW FL IP:N;PW FL IO:N;PW FL OP:N;PRG RST DLY:Y;UV DET:N;WD:N;WWD:N |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G5 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Screening Level | AEC-Q100 |
| Supply Current-Max (Isup) | 0.0007mA |
| Supply Voltage-Max (Vsup) | 10V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.2V |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PTPS3840DL42DBVRQ1:
Frequently Asked Questions
Does PTPS3840DL42DBVRQ1 support a programmable reset delay, and how is it set?
Yes, the reset time delay is programmable by connecting an external capacitor to the delay pin, allowing designers to set reset assertion periods from tens of milliseconds to several hundred milliseconds. This flexibility ensures the monitored microcontroller or processor has sufficient time to complete its internal power-on initialization before the reset is released, critical in automotive 3.3 V and 5 V ECU designs.
For an automotive ECU that must survive a -40°C cold start, is PTPS3840DL42DBVRQ1 rated for that condition?
Yes, PTPS3840DL42DBVRQ1 is AEC-Q100 qualified with a -40°C to +125°C operating temperature range, covering both arctic cold-start conditions and under-hood thermal extremes. The automotive Q1 designation confirms it has passed the stress tests defined in the AEC-Q100 standard for use in production vehicle electronics.
How does the manual reset pin on PTPS3840DL42DBVRQ1 benefit system-level watchdog designs?
The active manual reset input allows an external microcontroller watchdog output or a service-mode push button to force the reset line low independently of the voltage monitoring function, asserting reset for the programmed delay period. This eliminates an additional discrete reset driver component in automotive body control modules and diagnostic test interfaces.
What package and pin count does PTPS3840DL42DBVRQ1 use, and why is that form factor common in automotive reset circuits?
The device is housed in a 5-pin SOT-23 surface-mount package, one of the smallest and most cost-effective packages for discrete analog functions, measuring approximately 1.6 mm x 2.9 mm. The 5-pin configuration provides power, ground, reset output, delay, and manual reset connections in a footprint that fits tightly alongside microcontroller decoupling capacitors on automotive PCBs.
On which supply voltage levels is PTPS3840DL42DBVRQ1 typically deployed in automotive infotainment modules?
PTPS3840DL42DBVRQ1 is designed for high-input-voltage automotive environments and is commonly used to supervise 3.3 V and 5 V processor supply rails derived from the 12 V vehicle battery. The DL42 variant designation indicates a specific voltage threshold level, ensuring the reset output asserts when the monitored rail drops below the rated threshold during cranking events where battery voltage can dip to 6 V or lower.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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