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Analog Devices Inc./Maxim Integrated DS1812-10
- Part No.:
- DS1812-10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1812-10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,533
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Product details
Overview
DS1812-10 from Maxim Integrated is a precision voltage-monitoring reset IC with active-high push-pull output, designed to supervise 5V power supplies in microprocessor systems. It asserts reset when VCC falls below 4.25V–4.49V (typ. 4.35V), holds RST active for 100–300 ms after VCC recovery, and operates from –40°C to +85°C in TO-92 or SOT-23 packages.
For engineers reviewing the DS1812-10 datasheet, DS1812-10 pinout, DS1812-10 application, or DS1812-10 equivalent, this device delivers deterministic power-fail detection, guaranteed reset pulse width, temperature-compensated trip threshold, and low quiescent current-critical for reliable embedded system startup and brownout recovery.
Technical Context
The DS1812-10 integrates a precision temperature-compensated voltage reference and comparator to monitor VCC against a fixed 4.35V nominal trip point. Its internal circuitry generates an immediate RST assertion on undervoltage and enforces a minimum 100 ms (typ. 150 ms) reset hold time after VCC returns to tolerance.
No external components are required: the device provides a push-pull active-high output capable of sourcing 350 µA at 2.4V and sinking 10 mA at 0.4V, with supply current as low as 30 µA across its 1.2V–5.5V operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V–4.49V (min–max); ensures reliable reset activation before 5V rail collapse affects CPU operation |
| Reset Pulse Width | 100–300 ms; guarantees sufficient stabilization time for microprocessor and peripheral power domains |
| Output Type | Push-pull active-high; eliminates need for external pull-up resistor and supports direct MCU reset input |
| Supply Current | 30–40 µA; enables long-term battery-backed monitoring without significant drain |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded control and automotive under-hood environments |
| Output Drive | Sinks 10 mA at 0.4V; interfaces directly with standard CMOS/TTL reset inputs without level-shifting |
Pinout & Package
DS1812-10 is available in TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Both share identical pin mapping and functional assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TO-92) / 1 (SOT-23) | RST | Active-high push-pull reset output; drives MCU reset pin directly; no external pull-up required |
| 2 (TO-92) / 2 (SOT-23) | VCC | Power supply input; monitors voltage from 1.2V to 5.5V; trip threshold calibrated for 5V systems |
| 3 (TO-92) / 3 (SOT-23) | GND | Ground reference for voltage sensing and output stage; must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage threshold | 4.35V nominal trip with ±10% tolerance (4.25V–4.49V), compensated over temperature for stable brownout detection |
| Guaranteed reset timeout | 150 ms typical active-reset duration ensures full power and processor stabilization before release |
| Zero-component supervision | Self-contained reference, comparator, and output driver eliminate discrete resistors, capacitors, or transistors |
| Low-power operation | 30 µA max supply current enables use in always-on monitoring circuits without compromising battery life |
Applications
| Industrial PLC Controller | Smart Meter Power Management |
|---|---|
Use Scenario: Power interruption during firmware update or data logging causes unsafe state transitions. IC Role / Device Role / Timing Role: DS1812-10 monitors 5V supply and forces hard reset if VCC drops below 4.25V, preventing corrupted flash writes. Use Value: Guarantees clean restart with 150 ms reset hold-sufficient for DC-DC converter settling and MCU core initialization. | Use Scenario: Mains voltage sags during peak load cause meter SoC to latch or lose timekeeping accuracy. IC Role / Device Role / Timing Role: DS1812-10 triggers reset before brownout-induced logic errors occur, enabling safe shutdown and RTC backup activation. Use Value: Temperature-stable 4.35V threshold avoids false resets during ambient thermal cycling in outdoor enclosures. |
| Point-of-Sale Terminal | Medical Infusion Pump Controller |
Use Scenario: Unstable wall adapter output leads to intermittent USB communication failure and transaction loss. IC Role / Device Role / Timing Role: DS1812-10 supervises 5V rail feeding USB hub and display controller, asserting RST within 5 µs of undervoltage detection. Use Value: Push-pull output drives reset line without external components-reducing BOM count and PCB area in space-constrained designs. | Use Scenario: Battery-backed 5V supply dips during motor actuation, risking infusion rate miscalculation. IC Role / Device Role / Timing Role: DS1812-10 initiates controlled reset before analog sensor readings drift out of specification. Use Value: 10 mA sink capability ensures robust reset signaling even with noisy ground paths common in motor-driven medical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V trip point; open-drain output requiring external pull-up | Designed for higher-voltage 5V systems where tighter trip tolerance is needed | Choose when precise 4.63V threshold and compatibility with legacy open-drain reset buses are required |
| TPS3808G15DBVR | Adjustable trip via external resistor divider; 200 ms default reset timeout | Supports nonstandard supply rails (1.8V–6V); requires additional passive components | Choose when flexible threshold setting or multi-rail supervision is needed beyond fixed 5V monitoring |
Compared with MAX809SEUR+T and TPS3808G15DBVR, the DS1812-10 offers a fixed 4.35V trip optimized for cost-sensitive 5V microcontroller systems, eliminates external passives via push-pull output, and delivers guaranteed 150 ms reset hold-making it ideal for high-volume industrial and metering applications where simplicity and reliability are prioritized.
Availability
DS1812-10 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart electricity meters, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for DS1812-10 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1812-10 belongs to Maxim's EconoReset family-designed specifically for low-cost, zero-component power-supply supervision in resource-constrained embedded systems where reliability and ease of integration are critical.
FAQ
What is the exact VCC trip voltage range for DS1812-10?
The DS1812-10 has a guaranteed VCC trip point between 4.25V and 4.49V at 25°C, with typical value 4.35V. This range is specified across the full operating temperature range (–40°C to +85°C) and accounts for initial tolerance and temperature drift. The DS1812-10 uses an internal temperature-compensated reference to maintain stability, making it suitable for environments with wide thermal variation.
Does DS1812-10 require an external pull-up resistor on the RST pin?
No, DS1812-10 does not require an external pull-up resistor because it features a push-pull active-high output stage. The RST pin actively drives high (to VCC) and low (to GND), eliminating dependency on external components. This simplifies design, reduces BOM count, and improves noise immunity compared to open-drain reset ICs like the MAX809 series.
How long does DS1812-10 hold the reset signal active after VCC recovers?
The DS1812-10 holds RST active for 100 ms to 300 ms after VCC rises above the trip threshold, with a typical duration of 150 ms. This guaranteed minimum pulse width ensures adequate time for power supply ripple decay and microprocessor internal clock stabilization before release. The timing is internally generated and independent of external capacitance or loading.
Can DS1812-10 operate from a 3.3V supply?
Yes, DS1812-10 operates from 1.2V to 5.5V, but its 4.35V nominal trip point means it is intended for monitoring 5V rails-not 3.3V. When powered from 3.3V, the device remains functional and draws ~30 µA, but will assert reset whenever VCC drops below ~4.25V, which cannot occur. Thus, DS1812-10 is not suitable for 3.3V supply supervision; use DS1812-33 or DS1812-25 instead.
What package options are available for DS1812-10?
DS1812-10 is offered in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Pin 1 is RST, Pin 2 is VCC, and Pin 3 is GND in both variants. Mechanical drawings for both packages are published by Maxim (now Analog Devices) and confirm identical pinout, electrical behavior, and thermal characteristics-enabling drop-in replacement between assembly types.
DS1812-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.35V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1812-10 FAQ
1.How can I place an order for DS1812-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1812-10 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 DS1812-10 reliable?
The price and inventory of DS1812-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1812-10 is usually 5 days.
3.What payment methods are accepted for DS1812-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1812-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1812-10?
DS1812-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1812-10 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 DS1812-10?
For technical support, including DS1812-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1812-10 requirements.
6.How does Aetrix verify that DS1812-10 is sourced from the original manufacturer or authorized distributors?
All DS1812-10 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 DS1812-10 meets industry standards.
7.What is the process for return or replacement of DS1812-10?
All DS1812-10 units undergo pre-shipment inspection (PSI). If there is an issue with DS1812-10, 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 DS1812-10 part is unused and in its original packaging.
Return procedure for DS1812-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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