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Analog Devices Inc./Maxim Integrated DS1817R-10-U+
- Part No.:
- DS1817R-10-U+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DS1817R-10-U+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,525
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Product details
Overview
DS1817R-10-U+ from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with active-high push-pull output, designed for reliable power-on and power-fail reset generation in 3.0V systems. It features a 10% VCC trip point (2.80V–2.97V), 150ms reset pulse width after power recovery, -40°C to +85°C operation, and SOT-23-3 package.
For engineers reviewing the DS1817R-10-U+ datasheet, DS1817R-10-U+ pinout, DS1817R-10-U+ application, or DS1817R-10-U+ equivalent, key selection criteria include trip-point accuracy, reset timeout stability, push-pull drive capability, supply current (<35µA), and compatibility with 3.0V microcontroller reset inputs requiring active-high assertion.
Technical Context
The DS1817R-10-U+ integrates a temperature-compensated voltage reference and comparator to detect VCC deviations beyond ±10% of nominal 3.0V. Its internal circuitry asserts RST immediately on undervoltage and holds it active for 100–250ms after VCC returns to tolerance-guaranteeing microprocessor stabilization before release.
No external components are required: the device operates from 1.2V to 5.5V, draws only 28–35µA quiescent current, and delivers VOH ≥ VCC−0.1V at 0–500µA load while sinking up to 10mA on the RST pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.80V–2.97V (10% tolerance for 3.0V systems; ensures robust detection margin against noise and drift) |
| Reset Pulse Width | 100–250ms (guarantees stable power and processor initialization before deassertion) |
| Output Type | Push-pull active-high (drives directly into CMOS/TTL reset inputs without pull-up resistor) |
| Supply Current | 28–35µA (enables low-power battery-backed or always-on monitoring applications) |
| Operating Temp | -40°C to +85°C (supports industrial-grade embedded control and instrumentation) |
| Output Drive | Sinks 10mA / sources 350µA (compatible with standard microcontroller reset input thresholds) |
Pinout & Package
SOT-23-3 surface-mount package with 1.3mm × 2.9mm footprint and gull-wing leads; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-high reset output | Push-pull CMOS driver; asserts high during power fault or startup; no external pull-up needed |
| 2 (VCC) | Power supply input | Accepts 1.2V–5.5V; powers internal reference and comparator; trip threshold referenced to this pin |
| 3 (GND) | Ground reference | Return path for supply and output; must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Precision 10% VCC monitor | Guaranteed trip window (2.80V–2.97V) eliminates need for external resistor divider calibration |
| 150ms typ. reset hold time | Ensures reliable microprocessor reset sequencing across varying supply ramp rates and load conditions |
| Temperature-compensated reference | Maintains trip-point accuracy over full -40°C to +85°C range without external compensation |
| Push-pull active-high output | Direct interface to reset pins of ARM Cortex-M, PIC, AVR, and MSP430 microcontrollers |
| Ultra-low ICC (28–35µA) | Enables continuous monitoring in energy-constrained systems such as smart sensors and battery-powered IoT nodes |
Applications
| Industrial PLC Controller | Smart Energy Meter |
|---|---|
Use Scenario: Power interruption during firmware update or real-time data logging. IC Role / Device Role / Timing Role: Monitors 3.0V rail and asserts DS1817R-10-U+ RST to halt CPU execution and prevent flash corruption until stable power resumes. Use Value: Prevents invalid state transitions and ensures deterministic restart after brownout-critical for SIL-2 functional safety compliance. | Use Scenario: Mains voltage sag during grid instability affecting metrology SoC operation. IC Role / Device Role / Timing Role: DS1817R-10-U+ detects 3.0V supply deviation and holds reset for ≥100ms to allow ADC reference settling and EEPROM write completion. Use Value: Eliminates meter reading errors caused by premature release of reset during marginal supply conditions. |
| Medical Infusion Pump | Automotive Body Control Module |
Use Scenario: Battery voltage dip during motor startup or cold cranking. IC Role / Device Role / Timing Role: DS1817R-10-U+ monitors 3.0V logic rail and forces controlled shutdown via active-high reset to MCU before critical subsystems malfunction. Use Value: Ensures fail-safe pump stoppage and alarm activation within defined timing budget per IEC 62304 Class B requirements. | Use Scenario: Load-dump transients or alternator ripple causing 3.0V regulator output fluctuation. IC Role / Device Role / Timing Role: DS1817R-10-U+ provides deterministic reset assertion on 3.0V rail undervoltage, synchronizing MCU reboot with power rail recovery. Use Value: Avoids erratic CAN communication or GPIO latch-up by guaranteeing clean reset vector entry after electrical disturbance. |
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 (0–10s); open-drain output; higher ICC (1.2µA min) | Requires external pull-up; suited for ultra-low-VCC monitoring (e.g., 1.2V core rails), not 3.0V systems | Select if monitoring sub-1.8V supplies or needing programmable reset timeout; not drop-in for DS1817R-10-U+ 3.0V use case |
| MAX6326UR29D3+ | 2.93V fixed threshold; 140ms min reset timeout; open-drain output; 1.6µA ICC | Optimized for 3.3V systems; lacks 10% tolerance band; requires pull-up resistor | Use where precise 2.93V trip is acceptable and board space allows pull-up; not functionally identical due to output topology and tolerance spec |
Compared with TPS3808G12DBVR and MAX6326UR29D3+, the DS1817R-10-U+ uniquely combines 10% trip tolerance for 3.0V systems, push-pull active-high output, and minimal external component count-making it optimal for cost-sensitive, space-constrained 3.0V microcontroller reset applications without design iteration.
Availability
DS1817R-10-U+ is available at Aetrix Electronics and suitable for industrial automation, smart metering, medical instrumentation, and automotive body electronics requiring stable component supply and long-term lifecycle support.
Supply support for DS1817R-10-U+ 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 (acquired Maxim Integrated in 2021) designs high-performance analog, mixed-signal, and power management ICs for precision sensing, signal conditioning, and reliable system supervision.
The DS1817R-10-U+ belongs to Maxim's EconoReset family-engineered specifically for cost-effective, single-supply voltage monitoring and reset generation in 3.0V embedded systems with minimal external components.
FAQ
What is the exact VCC trip point range for DS1817R-10-U+?
The DS1817R-10-U+ has a guaranteed VCC trip point range of 2.80V to 2.97V at -40°C to +85°C, corresponding to ±10% of 3.0V nominal. This tolerance band is factory-trimmed and temperature-compensated, ensuring consistent detection across operating conditions without external calibration.
Does DS1817R-10-U+ require an external pull-up resistor on the RST pin?
No. The DS1817R-10-U+ features a push-pull active-high output, meaning it actively drives RST high during reset and low otherwise. No external pull-up resistor is needed-unlike open-drain reset ICs-which simplifies PCB layout and reduces BOM count.
Can DS1817R-10-U+ operate from a 1.8V supply?
Yes. The DS1817R-10-U+ supports VCC from 1.2V to 5.5V. However, its 10% trip point is specified relative to 3.0V (2.80V–2.97V), so at 1.8V supply it will assert reset continuously-making it unsuitable for monitoring 1.8V rails. It must be used on a 3.0V rail or higher with appropriate voltage scaling.
What is the maximum capacitive load the RST pin of DS1817R-10-U+ can drive?
The DS1817R-10-U+ RST pin is characterized for COUT ≤10pF. Driving larger loads may degrade rise/fall times and increase reset assertion/deassertion delay uncertainty. For longer traces or multiple loads, buffer amplification or layout optimization is recommended to maintain timing integrity.
Is DS1817R-10-U+ qualified for automotive applications?
The DS1817R-10-U+ is rated for -40°C to +85°C operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive body electronics where qualification is mandatory, consider AEC-Q100-compliant alternatives; DS1817R-10-U+ remains suitable for non-safety-critical aftermarket or industrial-grade vehicle systems.
DS1817R-10-U+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DS1817R-10-U+ FAQ
1.How can I place an order for DS1817R-10-U+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1817R-10-U+ 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 DS1817R-10-U+ reliable?
The price and inventory of DS1817R-10-U+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1817R-10-U+ is usually 5 days.
3.What payment methods are accepted for DS1817R-10-U+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1817R-10-U+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1817R-10-U+?
DS1817R-10-U+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1817R-10-U+ 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 DS1817R-10-U+?
For technical support, including DS1817R-10-U+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1817R-10-U+ requirements.
6.How does Aetrix verify that DS1817R-10-U+ is sourced from the original manufacturer or authorized distributors?
All DS1817R-10-U+ 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 DS1817R-10-U+ meets industry standards.
7.What is the process for return or replacement of DS1817R-10-U+?
All DS1817R-10-U+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1817R-10-U+, 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 DS1817R-10-U+ part is unused and in its original packaging.
Return procedure for DS1817R-10-U+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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