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Analog Devices Inc./Maxim Integrated DS1816R-10-U
- Part No.:
- DS1816R-10-U
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DS1816R-10-U.pdf
- Description:
- IC ECONRST 3.3V O-D 10% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:37,752
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Product details
Overview
DS1816R-10-U from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with open-drain 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 embedded power supervision.
For engineers reviewing the DS1816R-10-U datasheet, DS1816R-10-U pinout, DS1816R-10-U application, or DS1816R-10-U equivalent, key selection criteria include trip-point tolerance, reset timeout stability, internal pull-up resistor value, operating temperature range, and compatibility with 3V microcontroller reset inputs.
Technical Context
The DS1816R-10-U integrates a temperature-compensated voltage reference and comparator to detect VCC deviations beyond ±10%. Its internal circuitry asserts RST low on out-of-tolerance detection and holds it active for 100–250ms after VCC recovery - typical 150ms - ensuring processor stabilization.
It features an open-drain RST output with internal 3.5–7.5kΩ pull-up resistor, supports supply voltages from 0V to 5.5V, and draws only 28–35µA quiescent current. No external components are required for basic reset generation in 3V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.80V to 2.97V (±10% at 25°C); ensures reliable reset assertion for 3V systems |
| Reset Pulse Width | 100–250ms (typ. 150ms); guarantees sufficient time for power & CPU stabilization |
| Output Type | Open-drain with internal 3.5–7.5kΩ pull-up; eliminates need for external pull-up in most designs |
| Supply Voltage Range | 0V to 5.5V; supports operation during brown-out and across 1.2V–5.5V logic families |
| Quiescent Current | 28–35µA; enables ultra-low-power supervision in battery-backed systems |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded environments |
| Output Sink Current | 10mA @ 0.4V; drives standard CMOS reset inputs without buffering |
Pinout & Package
SOT-23-3 surface-mount package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low open-drain reset output | Asserts low during power fault or startup; requires external pull-up only if load exceeds internal 5kΩ capability |
| 2 (VCC) | Power supply input | Monitored supply rail; powers internal reference and comparator; accepts 0–5.5V |
| 3 (GND) | Ground reference | Return path for internal circuitry and reset output; must be low-impedance for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Precision ±10% VCC monitoring | Enables robust reset triggering in 3V systems without calibration or trimming |
| 150ms guaranteed reset timeout | Meets JEDEC JESD78 latch-up immunity timing requirements for microcontrollers |
| Internal 5kΩ pull-up resistor | Reduces BOM count and PCB area vs. discrete pull-up solutions |
| Temperature-compensated reference | Maintains trip-point accuracy across -40°C to +85°C without external compensation |
| Low 35µA operating current | Extends battery life in always-on supervisory applications such as RTC backup circuits |
Applications
| Industrial PLC Controller | Medical Sensor Node |
|---|---|
Use Scenario: Power interruption during field deployment causes uncontrolled MCU state corruption. IC Role / Device Role / Timing Role: DS1816R-10-U monitors 3.3V rail and forces hardware reset within 5µs of undervoltage detection, then holds reset for 150ms post-recovery. Use Value: Prevents firmware lockup and ensures deterministic boot sequence after brown-out events. | Use Scenario: Battery-powered wearable sensor intermittently experiences voltage sag during RF transmission. IC Role / Device Role / Timing Role: DS1816R-10-U acts as autonomous power-fail detector, asserting RST before supply drops below 2.80V to halt data capture safely. Use Value: Eliminates corrupted memory writes and preserves flash integrity during transient supply collapse. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Mains-powered meter must survive brief AC dropout without losing timekeeping or tariff data. IC Role / Device Role / Timing Role: DS1816R-10-U supervises auxiliary 3.3V LDO output and triggers controlled shutdown via microcontroller interrupt before VCC falls below 2.80V. Use Value: Enables graceful save-to-EEPROM and clock holdover using backup capacitor energy. | Use Scenario: 12V-to-3.3V DC/DC converter exhibits slow transient response during cold-crank conditions. IC Role / Device Role / Timing Role: DS1816R-10-U detects 3.3V rail collapse below 2.80V and holds MCU in reset until stable for ≥150ms post-recovery. Use Value: Avoids spurious CAN bus errors and EEPROM write failures during engine start cycles. |
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 quiescent current (1.1µA) | Designed for low-voltage ASICs; lacks integrated pull-up; requires external RC network | Prefer when precise delay tuning or sub-1V monitoring is needed; not drop-in for 3V systems |
| MAX6326UR29D3+ | 2.93V fixed threshold; 200ms reset timeout; no internal pull-up; 1.6µA IQ | Optimized for high-accuracy 3V systems; requires external 10kΩ pull-up; tighter trip tolerance (±1.5%) | Select for higher threshold accuracy where 2.93V match is critical; adds one passive component |
Compared with TPS3808G12DBVR and MAX6326UR29D3+, the DS1816R-10-U delivers plug-and-play 3V supervision with built-in pull-up and guaranteed 150ms timeout-reducing layout complexity and qualification effort in cost-sensitive industrial designs.
Availability
DS1816R-10-U is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, smart metering, and automotive body electronics requiring stable component supply over extended production lifecycles.
Supply support for DS1816R-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 (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and healthcare applications.
The DS1816R-10-U belongs to Maxim's EconoReset™ family - engineered for cost-effective, single-supply voltage monitoring and reset generation in space-constrained embedded systems.
FAQ
What is the exact VCC trip point range for DS1816R-10-U?
The DS1816R-10-U has a guaranteed VCC trip point range of 2.80V to 2.97V at 25°C, corresponding to its ±10% tolerance specification. This range is validated across the full -40°C to +85°C operating temperature and applies to the DS1816R-10-U variant specifically - not other DS1816 suffixes like -5 or -20.
Does DS1816R-10-U require an external pull-up resistor on the RST pin?
No, DS1816R-10-U includes an internal pull-up resistor of 3.5–7.5kΩ, sufficient for driving standard CMOS microcontroller reset inputs. An external pull-up is only needed if sink current exceeds 10mA or if faster rise time is required beyond what the internal resistor supports.
Can DS1816R-10-U be used with 5V microcontrollers?
Yes, DS1816R-10-U supports VCC up to 5.5V and its open-drain RST output is compatible with 5V-tolerant inputs. However, its 2.80–2.97V trip point is optimized for 3V systems; for 5V supervision, consider DS1816R-20-U (2.47–2.64V) or other variants with higher thresholds.
What is the reset timeout behavior of DS1816R-10-U during power-up?
During power-up, DS1816R-10-U asserts RST low until VCC rises above 2.97V, then holds RST active for 100–250ms (typically 150ms) to allow system stabilization. This timeout is internally generated and independent of external components or supply slew rate.
Is DS1816R-10-U pin-compatible with other DS1816 variants?
Yes, all DS1816 variants - including DS1816R-5-U, DS1816R-10-U, and DS1816R-20-U - share identical SOT-23-3 pinout (RST/VCC/GND) and package dimensions. Only the trip-point tolerance differs; no PCB redesign is needed when substituting between them.
DS1816R-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:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- 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
DS1816R-10-U FAQ
1.How can I place an order for DS1816R-10-U through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1816R-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 DS1816R-10-U reliable?
The price and inventory of DS1816R-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 DS1816R-10-U is usually 5 days.
3.What payment methods are accepted for DS1816R-10-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1816R-10-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1816R-10-U?
DS1816R-10-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1816R-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 DS1816R-10-U?
For technical support, including DS1816R-10-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1816R-10-U requirements.
6.How does Aetrix verify that DS1816R-10-U is sourced from the original manufacturer or authorized distributors?
All DS1816R-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 DS1816R-10-U meets industry standards.
7.What is the process for return or replacement of DS1816R-10-U?
All DS1816R-10-U units undergo pre-shipment inspection (PSI). If there is an issue with DS1816R-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 DS1816R-10-U part is unused and in its original packaging.
Return procedure for DS1816R-10-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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