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Analog Devices Inc./Maxim Integrated DS1812-15+
- Part No.:
- DS1812-15+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1812-15+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
DS1812-15+ from Maxim Integrated is a precision voltage-monitoring supervisor IC with active-high push-pull reset output, 4.13 V nominal VCC trip point (±15% tolerance), 150 ms reset pulse width, and operation from -40°C to +85°C. It automatically asserts reset during power failure and holds reset for 150 ms after VCC returns to tolerance-used in microcontroller-based embedded systems requiring reliable power-on initialization.
For engineers reviewing the DS1812-15+ datasheet, DS1812-15+ pinout, DS1812-15+ application, or DS1812-15+ equivalent, key selection factors include trip voltage accuracy (4.00–4.24 V), guaranteed 100–300 ms reset duration, push-pull output drive capability (350 µA VOH, 10 mA IOL), TO-92/SOT-23 package compatibility, and industrial temperature support.
Technical Context
The DS1812-15+ integrates a precision temperature-compensated voltage reference and comparator to detect VCC deviations against a fixed threshold. Its internal circuitry generates a power-fail signal when VCC drops below 4.00–4.24 V and sustains RST high for ≥100 ms after recovery.
It operates across 1.2 V to 5.5 V supply range with ultra-low quiescent current (30–40 µA) and features rail-to-rail push-pull output capable of sourcing 350 µA at VCC – 0.5 V and sinking 10 mA-eliminating need for external pull-up resistors in most microcontroller reset interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.00–4.24 V (15% tolerance band); ensures reset assertion before microcontroller brown-out threshold |
| Reset Pulse Width | 100–300 ms (typ. 150 ms); guarantees stable power and processor clock settling before release |
| Output Type | Push-pull active-high; drives reset line directly without external pull-up resistor |
| Supply Range | 1.2 V to 5.5 V; supports 3.3 V and 5 V logic domains and battery-backed systems |
| Quiescent Current | 30–40 µA; enables low-power always-on monitoring in energy-sensitive applications |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded control and instrumentation |
Pinout & Package
DS1812-15+ is available in TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Both share identical pin assignment and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-high reset output | Push-pull CMOS output directly interfaces microcontroller /RESET pin; no external pull-up required |
| 2 (VCC) | Power supply input | Monitored supply rail; 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 voltage sensing |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage threshold | 4.13 V nominal with ±15% tolerance (DS1812-15+); tightly matched to 5 V system brown-out margins |
| Guaranteed reset timing | 100–300 ms active window; ensures full stabilization of power rails and CPU clocks before release |
| Low-power operation | 30–40 µA ICC; enables continuous supervision in battery-powered or standby-mode systems |
| Push-pull output stage | Sources 350 µA at VCC – 0.5 V, sinks 10 mA; eliminates external components and reduces BOM count |
Applications
| Industrial PLC Controller | Smart Metering Unit |
|---|---|
Use Scenario: Power interruption during firmware update or data logging causes unsafe state transitions. IC Role / Device Role / Timing Role: Supervisor IC asserting active-high reset to hold MCU in reset until regulated 5 V rail stabilizes post-recovery. Use Value: Prevents corrupted flash writes and register misconfiguration by enforcing ≥100 ms reset hold time after VCC recovery. | Use Scenario: Mains voltage sags below 90% during grid fluctuations, risking meter calibration drift or EEPROM corruption. IC Role / Device Role / Timing Role: Voltage monitor detecting 4.00–4.24 V trip point and holding reset for 150 ms to allow LDO and RTC to relock. Use Value: Ensures deterministic boot sequence and preserves metrology accuracy during transient brownouts. |
| Medical Diagnostic Sensor Node | Point-of-Sale Terminal |
Use Scenario: Battery backup switchover introduces brief VCC dip that could trigger false resets or incomplete ADC conversions. IC Role / Device Role / Timing Role: Precision supervisor with 15% trip tolerance and 150 ms reset pulse synchronizing MCU restart with stabilized analog front-end supply. Use Value: Guarantees clean power sequencing for Class III medical sensor signal chain integrity and regulatory compliance. | Use Scenario: Unplanned AC loss during transaction processing risks payment data loss or inconsistent ledger states. IC Role / Device Role / Timing Role: Reset generator holding ARM Cortex-M4 in reset for ≥100 ms while backup capacitor discharges and DC-DC converter re-regulates. Use Value: Enables atomic transaction rollback and safe NVRAM commit before system shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–41D | 4.1 V trip (±1.5%), 140 ms min reset pulse, open-drain output | Requires external pull-up; tighter trip accuracy but less tolerant of supply ripple | Preferred where precise 4.1 V threshold and low tempco are critical; not drop-in due to open-drain output |
| TPS3808G15 | 4.15 V trip (±0.5%), 200 ms fixed reset delay, push-pull output | Higher accuracy, longer fixed delay, wider supply range (up to 6 V) | Offers superior trip stability and extended voltage margin; pinout differs (SOT-23-5 vs SOT-23-3) |
Compared with MAX6326–41D and TPS3808G15, the DS1812-15+ provides cost-optimized 15% trip tolerance and minimal 3-pin footprint-ideal for high-volume industrial controls where moderate accuracy and board space savings outweigh ultra-tight regulation needs.
Availability
DS1812-15+ is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering units, medical diagnostic sensor nodes, and point-of-sale terminals requiring stable component supply across multi-year production cycles.
Supply support for DS1812-15+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The DS1812-15+ belongs to the EconoReset™ family-low-cost, single-supply voltage supervisors targeting cost-sensitive embedded systems needing robust power-on reset and brown-out protection.
FAQ
What is the exact VCC trip voltage range for DS1812-15+?
The DS1812-15+ has a guaranteed VCC trip point between 4.00 V and 4.24 V at +25°C, corresponding to its ±15% tolerance designation. This range is specified under DC electrical characteristics and remains stable across the full -40°C to +85°C operating temperature range due to internal temperature compensation. The DS1812-15+ uses this threshold to assert reset before most 5 V microcontrollers enter undefined operation.
Does DS1812-15+ require an external pull-up resistor on the RST pin?
No, the DS1812-15+ features a push-pull active-high output stage capable of sourcing up to 350 µA and sinking up to 10 mA. This eliminates the need for an external pull-up resistor in standard microcontroller reset interfaces. The DS1812-15+ directly drives the /RESET input of most MCUs without additional components, reducing BOM count and PCB area.
How long does the DS1812-15+ hold reset active after VCC recovers?
The DS1812-15+ holds the RST output active for 100–300 ms after VCC returns to within tolerance, with a typical value of 150 ms. This guaranteed minimum pulse width ensures sufficient time for power supply stabilization and microprocessor clock lock before release. The DS1812-15+ timing is internally generated and independent of external capacitors or resistors.
Can DS1812-15+ operate from a 3.3 V supply?
Yes, the DS1812-15+ operates over a supply range of 1.2 V to 5.5 V, making it fully compatible with 3.3 V systems. Its 4.00–4.24 V trip point remains valid across this range, allowing use in mixed-voltage designs where the monitored rail is 5 V but the supervisor itself is powered from a 3.3 V auxiliary supply. The DS1812-15+ maintains specified timing and output drive performance at 3.3 V.
What package options are available for DS1812-15+?
The DS1812-15+ is offered in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Both variants share identical pinout (RST-VCC-GND), electrical specifications, and thermal ratings. The TO-92 version supports manual assembly and prototyping, while the SOT-23 variant enables high-density automated PCB assembly. The DS1812-15+ marking "15" denotes the 15% trip tolerance variant in either package.
DS1812-15+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.13V
- 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
DS1812-15+ FAQ
1.How can I place an order for DS1812-15+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1812-15+ 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 DS1812-15+ reliable?
The price and inventory of DS1812-15+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1812-15+ is usually 5 days.
3.What payment methods are accepted for DS1812-15+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1812-15+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1812-15+?
DS1812-15+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1812-15+ 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 DS1812-15+?
For technical support, including DS1812-15+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1812-15+ requirements.
6.How does Aetrix verify that DS1812-15+ is sourced from the original manufacturer or authorized distributors?
All DS1812-15+ 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 DS1812-15+ meets industry standards.
7.What is the process for return or replacement of DS1812-15+?
All DS1812-15+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1812-15+, 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 DS1812-15+ part is unused and in its original packaging.
Return procedure for DS1812-15+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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