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Analog Devices Inc./Maxim Integrated DS1818R-10/T&R
- Part No.:
- DS1818R-10/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DS1818R-10/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,432
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Product details
Overview
DS1818R-10/T&R from Maxim Integrated is a 3.3V fixed-threshold supervisory IC with pushbutton reset capability, active-low open-drain reset output, 150ms reset timeout, and internal 5.5kΩ pullup resistor. It monitors VCC for out-of-tolerance conditions and ensures microprocessor stabilization in embedded power management systems.
For engineers reviewing the DS1818R-10/T&R datasheet, DS1818R-10/T&R pinout, DS1818R-10/T&R application, or DS1818R-10/T&R equivalent, key selection factors include its 10% trip tolerance (2.80V–2.97V), -40°C to +85°C operation, 35µA max quiescent current, pushbutton-synchronized reset timing, and SOT-23/TO-92 package compatibility.
Technical Context
The DS1818R-10/T&R implements a precision temperature-compensated voltage reference and comparator to detect VCC deviations beyond ±10% of 3.3V. Its internal logic asserts RST low on power-down and holds it active for 150ms after VCC returns to tolerance.
It supports dual reset initiation modes: automatic power-fail detection and manual pushbutton override via the RST pin - which functions as both output and input. The open-drain output includes an integrated 5.5kΩ pullup, eliminating external components while maintaining 10mA sink capability at 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Threshold | 2.80V–2.97V (±10% of 3.3V); ensures reliable reset activation across supply variation |
| Reset Timeout | 100–250ms (typ. 150ms); guarantees processor and power rail stabilization before release |
| Quiescent Current | ≤35µA; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Output Type | Active-low open-drain with internal 5.5kΩ pullup; reduces BOM count and PCB area |
| Operating Temp | -40°C to +85°C; supports industrial-grade deployment without derating |
| Pushbutton Response | Detects <1µs low pulse; allows compact, noise-immune manual reset interface |
Pinout & Package
SOT-23 and TO-92 packages are supported. DS1818R-10/T&R is supplied in tape-and-reel (T&R) format using the SOT-23-3 package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output / pushbutton input | Open-drain output sinks up to 10mA; also accepts sub-microsecond low pulses for manual reset initiation |
| 2 (VCC) | Power supply input | Accepts 1.0V–5.5V; powers internal reference, comparator, and timing circuitry |
| 3 (GND) | Ground reference | Common return path for VCC and RST; required for accurate threshold sensing and reset timing |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V ±10% threshold | Eliminates external resistor network; simplifies design for standard 3.3V logic domains |
| Integrated 5.5kΩ pullup resistor | Removes need for discrete pullup; saves board space and reduces assembly cost |
| 150ms reset hold time | Guarantees stable VCC and processor clock lock before system exit from reset state |
| Pushbutton-synchronized reset | Enables clean, debounced manual reset without external RC or logic |
| Temperature-compensated reference | Maintains threshold accuracy over full -40°C to +85°C range without calibration |
Applications
| Industrial PLC Control | Smart Metering |
|---|---|
Use Scenario: Power interruption during firmware update or sensor polling in field-deployed controllers. IC Role / Device Role / Timing Role: Supervisory IC providing fail-safe reset assertion and 150ms stabilization window post-recovery. Use Value: Prevents corrupted register writes and CPU lockup by enforcing deterministic reset timing aligned with 3.3V rail behavior. | Use Scenario: Battery-backed real-time clock and metrology IC operation during AC mains dropout. IC Role / Device Role / Timing Role: Voltage monitor and pushbutton reset controller with ultra-low ICC (≤35µA). Use Value: Extends backup battery life while ensuring RTC integrity and enabling field technician-initiated recalibration via momentary switch. |
| Embedded Gateway | POS Terminal |
Use Scenario: Multi-rail power sequencing in ARM-based gateways with Ethernet and cellular interfaces. IC Role / Device Role / Timing Role: Single-supply supervisor for primary 3.3V domain, coordinating reset propagation to SoC and peripheral ICs. Use Value: Reduces component count versus discrete reset solutions while supporting both automatic and service-mode reset triggers. | Use Scenario: Transaction-critical reset handling during payment processing under unstable retail power conditions. IC Role / Device Role / Timing Role: Fail-fast VCC monitor with guaranteed 150ms reset hold and pushbutton override for cashier-initiated reboot. Use Value: Ensures transaction atomicity by preventing partial EEPROM writes or display corruption during brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 3.08V ±2.5% threshold; no pushbutton monitoring; 140ms reset timeout | Lacks manual reset input; requires external switch interface for operator control | Preferred when only power-fail reset is needed and tighter threshold tolerance is critical |
| TPS3808G33DBVR | 3.3V ±0.5% threshold; adjustable delay; higher ICC (1.2µA typ); no integrated pushbutton support | Requires external RC network for delay tuning; no native pushbutton debounce or timing | Chosen for high-precision reset thresholds and programmable timeout in non-pushbutton designs |
Compared with MAX809TRD3+T and TPS3808G33DBVR, the DS1818R-10/T&R uniquely integrates pushbutton reset synchronization and a factory-trimmed ±10% 3.3V threshold in a single SOT-23-3 package - reducing external components and enabling field-serviceable reset without additional logic.
Availability
DS1818R-10/T&R is available at Aetrix Electronics and suitable for industrial PLC control, smart metering, and embedded gateway applications requiring stable component supply, long-term lifecycle support, and consistent tape-and-reel delivery.
Supply support for DS1818R-10/T&R 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 markets.
The DS1818R-10/T&R belongs to the EconoReset™ family of supervisory ICs engineered for cost-sensitive, space-constrained embedded systems needing reliable power monitoring and manual reset integration without external components.
FAQ
What is the exact VCC trip point range for DS1818R-10/T&R?
The DS1818R-10/T&R has a guaranteed VCC trip point range of 2.80V to 2.97V, corresponding to ±10% of 3.3V. This specification is tested and validated across the full -40°C to +85°C operating temperature range and is documented in the DC Electrical Characteristics table of the official Maxim Integrated datasheet for DS1818R-10/T&R.
Does DS1818R-10/T&R require an external pullup resistor on the RST pin?
No, DS1818R-10/T&R includes an internal 5.5kΩ pullup resistor on the RST pin, eliminating the need for an external component. This feature is confirmed in the "Efficient Open-Drain Output" section of the datasheet and applies directly to DS1818R-10/T&R in both SOT-23 and TO-92 packages.
How does the pushbutton reset function work on DS1818R-10/T&R?
The DS1818R-10/T&R monitors the RST pin for low pulses ≥1µs. When released, it asserts RST low for ~150ms. This behavior is intrinsic to DS1818R-10/T&R's design and requires no external timing components - verified in the "OPERATION – PUSHBUTTON RESET" section and Figure 3 timing diagram of the DS1818R-10/T&R datasheet.
What is the maximum sink current capability of the DS1818R-10/T&R RST output?
The DS1818R-10/T&R RST output can sink up to +10mA when the output voltage is ≤0.4V, as specified in the "DC Electrical Characteristics" table under parameter IOL. This rating applies across the full operating temperature range and ensures compatibility with standard microcontroller reset inputs.
Is DS1818R-10/T&R compatible with 5V systems?
Yes, DS1818R-10/T&R operates with VCC from 1.0V to 5.5V and is rated for absolute maximum VCC of +7.0V. Its 3.3V ±10% threshold remains valid regardless of supply voltage, making it suitable for 5V systems where the monitored rail is 3.3V - confirmed in the Recommended DC Operating Conditions and Absolute Maximum Ratings tables for DS1818R-10/T&R.
DS1818R-10/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.88V
- 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
DS1818R-10/T&R FAQ
1.How can I place an order for DS1818R-10/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1818R-10/T&R 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 DS1818R-10/T&R reliable?
The price and inventory of DS1818R-10/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1818R-10/T&R is usually 5 days.
3.What payment methods are accepted for DS1818R-10/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1818R-10/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1818R-10/T&R?
DS1818R-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1818R-10/T&R 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 DS1818R-10/T&R?
For technical support, including DS1818R-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1818R-10/T&R requirements.
6.How does Aetrix verify that DS1818R-10/T&R is sourced from the original manufacturer or authorized distributors?
All DS1818R-10/T&R 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 DS1818R-10/T&R meets industry standards.
7.What is the process for return or replacement of DS1818R-10/T&R?
All DS1818R-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1818R-10/T&R, 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 DS1818R-10/T&R part is unused and in its original packaging.
Return procedure for DS1818R-10/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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