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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:4,607
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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 automatically restart microprocessors after power failure. It asserts reset for 150 ms after VCC returns to tolerance (trip point 4.25–4.49 V), features temperature-compensated voltage reference, and operates from -40°C to +85°C in SOT-23 or TO-92 packages - used in embedded microcontroller power sequencing.
For engineers reviewing the DS1812-10+ datasheet, DS1812-10+ pinout, DS1812-10+ application, or DS1812-10+ equivalent, key selection criteria include guaranteed 150 ms reset timeout, 4.35 V typical VCC trip point, push-pull output drive capability (350 µA VOH, 10 mA IOL), and compatibility with 1.2–5.5 V supply rails in space-constrained industrial control systems.
Technical Context
The DS1812-10+ integrates a precision bandgap voltage reference and comparator to continuously monitor VCC against a factory-trimmed threshold of 4.25–4.49 V. Its internal timing circuit ensures reset remains asserted for 100–300 ms after VCC recovery, independent of external components.
It delivers a CMOS-compatible active-high push-pull RST signal with VOH ≥ VCC − 0.1 V and IOL = 10 mA, eliminating need for external pull-up resistors. The device draws only 30–40 µA quiescent current and supports VCC slew rates down to 300 ns between trip thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25–4.49 V; precise threshold for detecting 5 V rail undervoltage, enabling reliable microprocessor reset initiation |
| Reset Timeout | 100–300 ms (typ. 150 ms); guarantees stable power and processor initialization before release |
| Output Type | Push-pull active-high; drives RST directly without external pull-up, simplifying PCB layout and reducing BOM count |
| Supply Range | 1.2–5.5 V; supports operation across wide input range including battery-backed and low-voltage logic rails |
| Quiescent Current | 30–40 µA; enables use in always-on monitoring circuits without significant power penalty |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded environments without derating |
| Output Drive | IOL = 10 mA, VOH ≥ VCC − 0.1 V; sufficient to directly interface with standard CMOS inputs under load |
Pinout & Package
DS1812-10+ is available in SOT-23 (3-pin) and TO-92 (3-pin) packages. Both share identical pin mapping: Pin 1 = RST (active-high reset output), Pin 2 = VCC (power supply input), Pin 3 = GND (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-high push-pull output | Drives microcontroller RESET pin high during fault and release; no external pull-up required |
| 2 (VCC) | Power supply input | Monitored rail input; powers internal reference and comparator; accepts 1.2–5.5 V |
| 3 (GND) | Ground reference | Common return path for VCC and RST; must be low-impedance for accurate trip-point stability |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed VCC threshold | 4.25–4.49 V tolerance window ensures consistent reset activation across production lots |
| Internal 150 ms timer | Guarantees minimum reset assertion time post-recovery, eliminating need for RC timing networks |
| Temperature-compensated reference | Maintains trip-point accuracy over -40°C to +85°C without external calibration |
| Low quiescent current | 30–40 µA draw enables integration into battery-backed or energy-sensitive systems |
| Push-pull CMOS output | Directly drives standard logic inputs; eliminates pull-up resistor and associated board area and cost |
Applications
| Industrial PLC Controller | Smart Meter Power Sequencing |
|---|---|
Use Scenario: Power interruption detection during grid fluctuations causes transient brownouts in programmable logic controllers. IC Role / Device Role / Timing Role: DS1812-10+ monitors 5 V supply rail and asserts active-high reset to halt CPU execution until stable voltage is restored and held for 150 ms. Use Value: Prevents corrupted firmware execution or register state loss by enforcing deterministic restart timing after undervoltage events. | Use Scenario: Smart electricity meters require reliable power-on reset and brownout recovery to maintain metrology accuracy and secure data logging. IC Role / Device Role / Timing Role: DS1812-10+ serves as dedicated supervisor for the meter's MCU, triggering reset when VCC drops below 4.35 V and holding it for 150 ms on recovery. Use Value: Ensures EEPROM write integrity and real-time clock synchronization by guaranteeing full power stabilization before system boot. |
| Embedded HVAC Controller | Point-of-Sale Terminal Boot Integrity |
Use Scenario: HVAC control boards experience voltage sags during compressor startup, risking MCU lockup or sensor misreads. IC Role / Device Role / Timing Role: DS1812-10+ continuously supervises the 5 V rail and forces controlled reset if VCC falls outside 4.25–4.49 V window, then enforces 150 ms hold time. Use Value: Eliminates field failures due to unresponsive UI or incorrect actuator commands caused by partial MCU initialization. | Use Scenario: POS terminals must guarantee clean boot after AC power restoration or battery switchover to prevent transaction corruption. IC Role / Device Role / Timing Role: DS1812-10+ provides active-high reset to the terminal's ARM-based application processor, synchronized to 5 V rail recovery with factory-calibrated trip point. Use Value: Reduces support tickets related to frozen displays or failed payment processing by ensuring deterministic power-on sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Active-low open-drain output; 4.63 V trip point; requires external pull-up resistor | Requires PCB redesign for active-low logic polarity and pull-up component | Choose when legacy designs mandate active-low reset or compatibility with existing MAX809 footprint |
| TPS3808G15DBVR | Adjustable trip point (via external resistor divider); 1.5% accuracy; 200 ms fixed timeout | Supports non-standard supply voltages but adds two passive components and layout complexity | Prefer when system uses non-5 V rails (e.g., 3.3 V or 2.5 V) and adjustable threshold is required |
Compared with MAX809TRD3+T and TPS3808G15DBVR, the DS1812-10+ offers plug-and-play integration for 5 V systems with its fixed 4.35 V trip, active-high push-pull output, and zero-component reset timing - reducing design risk and validation effort in cost-sensitive industrial controls.
Availability
DS1812-10+ is available at Aetrix Electronics and suitable for industrial PLC controllers, smart meter power sequencing, and embedded HVAC systems requiring stable component supply with guaranteed long-term availability.
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 analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The DS1812-10+ belongs to Maxim's EconoReset™ family of supervisory circuits, engineered for low-cost, high-reliability power monitoring in resource-constrained embedded systems where simplicity and proven robustness are critical.
FAQ
What is the exact VCC trip point range for DS1812-10+?
The DS1812-10+ has a factory-trimmed VCC trip point range of 4.25 V to 4.49 V, with a typical value of 4.35 V. This specification is guaranteed over the full operating temperature range (-40°C to +85°C) and applies specifically to the DS1812-10+ variant, distinguishing it from DS1812-5 (4.50–4.75 V) and DS1812-15 (4.00–4.24 V).
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 (VOH ≥ VCC − 0.1 V) and low (IOL = 10 mA), enabling direct connection to standard CMOS reset inputs without additional components - a key advantage over open-drain alternatives like the MAX809 series.
How long is the reset pulse duration after VCC recovery for DS1812-10+?
The DS1812-10+ holds the RST pin active for a guaranteed minimum of 100 ms and maximum of 300 ms after VCC returns to tolerance, with a typical duration of 150 ms. This internal timer is fully integrated and requires no external capacitors or resistors, ensuring consistent reset timing across temperature and supply variations.
Can DS1812-10+ operate from a 3.3 V supply rail?
Yes, DS1812-10+ supports supply voltages from 1.2 V to 5.5 V, so it can monitor a 3.3 V rail - but its fixed 4.25–4.49 V trip point means it will only assert reset if that rail exceeds 4.25 V. For 3.3 V supervision, a different variant (e.g., DS1812-33) or alternative IC with lower trip point is required; DS1812-10+ is optimized for 5 V systems.
What package options are available for DS1812-10+?
DS1812-10+ is offered in both SOT-23 (surface-mount, 3-pin) and TO-92 (through-hole, 3-pin) packages. Both share identical pinout: Pin 1 = RST, Pin 2 = VCC, Pin 3 = GND. The SOT-23 variant saves board space and supports automated assembly, while TO-92 suits prototyping or legacy through-hole designs.
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:
- Active
- 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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