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Analog Devices Inc./Maxim Integrated DS1815R-10+T&R
- Part No.:
- DS1815R-10+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DS1815R-10+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:13,205
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Product details
Overview
DS1815R-10+T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with push-pull output, designed to automatically restart microprocessors after power failure. It provides 10% VCC trip point accuracy (2.80V–2.97V), guarantees 150ms reset pulse width, and operates from -40°C to +85°C in SOT-23 package.
For engineers reviewing the DS1815R-10+T&R datasheet, DS1815R-10+T&R pinout, DS1815R-10+T&R application, or DS1815R-10+T&R equivalent, key selection factors include guaranteed reset timeout, push-pull drive capability, 10% supply tolerance threshold, low quiescent current (28–35µA), and compatibility with 1.2V–5.5V VCC rails in space-constrained embedded systems.
Technical Context
The DS1815R-10+T&R integrates a temperature-compensated voltage reference and comparator to detect VCC out-of-tolerance conditions. Its internal circuitry asserts RST low when VCC drops below 2.80V (min), holding it active for 100–250ms after VCC returns above 2.97V (max).
It features CMOS push-pull output capable of sourcing 350µA at 2.4V and sinking 10mA at 0.4V, eliminating need for external pull-up resistors. Reset timing is independent of VCC slew rate within specified limits, ensuring reliable power-up sequencing across varying supply ramp profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.80V (min) to 2.97V (max); sets precise 10% undervoltage detection threshold for 3.0V nominal supplies |
| Reset Pulse Width | 100–250ms; ensures stable microprocessor initialization after power recovery |
| Supply Range | 1.2V to 5.5V; supports wide-rail operation including 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V logic domains |
| Quiescent Current | 28–35µA; enables ultra-low-power monitoring in battery-backed or energy-sensitive systems |
| Output Drive | Sinks 10mA / sources 350µA; drives standard CMOS inputs directly without external pull-up |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded control and instrumentation environments |
Pinout & Package
SOT-23-3 surface-mount package with 1.3mm × 2.9mm footprint and 0.95mm height; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-Low Reset Output | Push-pull CMOS output; asserts low during power fault and for ≥100ms after VCC recovery |
| 2 (VCC) | Power Supply Input | Accepts 1.2V–5.5V; powers internal reference, comparator, and output stage |
| 3 (GND) | Ground Reference | Return path for all internal circuits; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| 10% VCC threshold accuracy | Guarantees consistent reset activation across temperature (-40°C to +85°C) and process variation |
| 150ms typical reset timeout | Meets JEDEC JESD78 reliability requirements for microprocessor power-on reset timing |
| Push-pull output architecture | Eliminates external pull-up resistor, reducing BOM count and PCB area in compact designs |
| Low 28–35µA operating current | Extends battery life in always-on monitoring applications such as smart sensors and IoT edge nodes |
Applications
| Industrial PLC Controller | Medical Sensor Node |
|---|---|
Use Scenario: Power interruption during field deployment causes transient brownout in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: DS1815R-10+T&R monitors 3.3V rail and forces controlled processor reset before corrupted state propagation. Use Value: Prevents firmware lockup and ensures deterministic recovery with 150ms stabilization window aligned to MCU boot sequence. | Use Scenario: Battery-powered wearable sensor intermittently experiences voltage sag during RF transmission bursts. IC Role / Device Role / Timing Role: DS1815R-10+T&R detects sub-2.80V dips on 3.0V supply and holds reset until regulated rail stabilizes. Use Value: Avoids data corruption in flash memory writes and preserves calibration integrity during intermittent power events. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Load dump or cold-crank event induces temporary VCC dip below specification in BCM microcontroller domain. IC Role / Device Role / Timing Role: DS1815R-10+T&R provides fail-safe reset signaling independent of main power management IC. Use Value: Enables safe shutdown of CAN transceivers and GPIO peripherals before voltage collapse, preventing bus contention. | Use Scenario: Mains-powered meter experiences brief AC dropout causing DC rail instability in real-time clock and metrology subsystems. IC Role / Device Role / Timing Role: DS1815R-10+T&R monitors 3.3V backup rail and initiates clean restart of metrology ASIC upon recovery. Use Value: Maintains timekeeping continuity and prevents erroneous kWh accumulation during grid disturbance intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12DBVR | Fixed 1.2V threshold; adjustable delay via external capacitor; higher 1.5µA quiescent current | Requires external timing component; less suitable for fixed-tolerance, minimal-BOM designs | Prefer DS1815R-10+T&R when 10% 3.0V monitoring and zero-external-component simplicity are required |
| MAX6326UT29D3+ | 2.93V threshold (±1.5%); open-drain output; 160ms min reset timeout; 1.6µA IQ | Needs pull-up resistor; tighter threshold tolerance but no push-pull drive | Choose DS1815R-10+T&R for push-pull output and direct compatibility with SOT-23 footprint in cost-sensitive industrial controls |
Compared with TPS3808G12DBVR and MAX6326UT29D3+, the DS1815R-10+T&R delivers fixed 10% trip accuracy, integrated push-pull output, and lowest BOM impact-making it optimal for high-volume, space-constrained 3.0V/3.3V microcontroller reset applications where external components must be minimized.
Availability
DS1815R-10+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical sensor nodes, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for DS1815R-10+T&R 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
Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for high-reliability industrial, automotive, and healthcare applications.
The DS1815R-10+T&R belongs to the EconoReset™ family-engineered for cost-effective, single-supply voltage monitoring and microprocessor reset generation in resource-constrained embedded systems.
FAQ
What is the exact VCC trip point range for DS1815R-10+T&R?
The DS1815R-10+T&R has a guaranteed VCC trip point range of 2.80V (minimum) to 2.97V (maximum), corresponding to a 10% tolerance around a nominal 3.0V supply. This range is validated across -40°C to +85°C and is based on internal temperature-compensated reference design. The DS1815R-10+T&R maintains this accuracy without external calibration components.
Does DS1815R-10+T&R require an external pull-up resistor on the RST pin?
No. The DS1815R-10+T&R features a push-pull output stage that actively drives RST low during reset and high when inactive. It can source up to 350µA and sink up to 10mA, eliminating the need for an external pull-up resistor. This simplifies layout and reduces BOM count compared to open-drain reset ICs like the MAX6326 series.
What is the minimum and maximum reset pulse width for DS1815R-10+T&R?
The DS1815R-10+T&R guarantees a reset pulse width between 100ms (minimum) and 250ms (maximum) after VCC returns to tolerance. The typical value is 150ms, providing sufficient time for microprocessor and power supply stabilization. This timing is internally generated and does not depend on external capacitors or resistors.
Can DS1815R-10+T&R operate with a 1.8V supply?
Yes. The DS1815R-10+T&R supports VCC from 1.2V to 5.5V, making it compatible with 1.8V logic domains. However, its 10% trip point (2.80V–2.97V) is optimized for 3.0V nominal supplies. For 1.8V systems, consider DS1815R-20+T&R (2.47V–2.64V trip) or verify system-level margin using the full DC electrical characteristics table.
Is DS1815R-10+T&R pin-compatible with other DS1815 variants?
Yes. All DS1815 variants-including DS1815R-5+T&R, DS1815R-10+T&R, and DS1815R-20+T&R-share identical SOT-23-3 pinout (RST/VCC/GND) and package dimensions. Only the internal voltage threshold differs; no PCB layout change is needed when selecting among tolerance options for the same application voltage rail.
DS1815R-10+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.88V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DS1815R-10+T&R FAQ
1.How can I place an order for DS1815R-10+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1815R-10+T&R 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 DS1815R-10+T&R reliable?
The price and inventory of DS1815R-10+T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1815R-10+T&R is usually 5 days.
3.What payment methods are accepted for DS1815R-10+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1815R-10+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1815R-10+T&R?
DS1815R-10+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1815R-10+T&R 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 DS1815R-10+T&R?
For technical support, including DS1815R-10+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1815R-10+T&R requirements.
6.How does Aetrix verify that DS1815R-10+T&R is sourced from the original manufacturer or authorized distributors?
All DS1815R-10+T&R 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 DS1815R-10+T&R meets industry standards.
7.What is the process for return or replacement of DS1815R-10+T&R?
All DS1815R-10+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1815R-10+T&R, 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 DS1815R-10+T&R part is unused and in its original packaging.
Return procedure for DS1815R-10+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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