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Analog Devices Inc./Maxim Integrated DS1813-10/T&R
- Part No.:
- DS1813-10/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1813-10/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
DS1813-10/T&R from Maxim Integrated is a precision voltage-monitoring reset IC with pushbutton reset capability, designed for microprocessor supervision in 5V systems. It features a 4.25V to 4.49V VCC trip point (±10% tolerance), 150ms reset timeout, open-drain RST output with internal 5.5kΩ pullup, and operates from -40°C to +85°C in SOT-23 package.
For engineers reviewing the DS1813-10/T&R datasheet, DS1813-10/T&R pinout, DS1813-10/T&R application, or DS1813-10/T&R equivalent, key selection criteria include reset threshold accuracy, pushbutton debounce timing, supply current (<40µA), open-drain drive strength (10mA sink), and compatibility with 5V microcontroller reset inputs.
Technical Context
The DS1813-10/T&R implements dual-monitoring logic: a precision temperature-compensated voltage reference compares VCC against a fixed 4.35V nominal threshold (10% tolerance band), while an independent digital circuit detects external RST line assertion via pushbutton. Both paths assert the same active-low open-drain RST output.
Reset assertion occurs within 2–5µs of VCC falling below VCCTP or pushbutton pull-down ≥1µs; release-triggered reset holds RST low for 100–300ms (typ. 150ms) regardless of trigger source. The internal 5.5kΩ pullup enables direct interface to standard CMOS reset inputs without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V (min) to 4.49V (max); ensures reliable reset activation before 5V rail drops below microprocessor VDD min spec. |
| Reset Timeout | 100–300ms (typ. 150ms); provides sufficient stabilization time for power supply and CPU after recovery. |
| Supply Current | 30–40µA; enables long-term battery-backed operation without significant drain. |
| Output Sink Current | 10mA at 0.4V; drives standard CMOS reset inputs directly, even under heavy capacitive load. |
| Operating Temp | -40°C to +85°C; supports industrial-grade embedded applications without derating. |
| Internal Pullup | 3.5–7.5kΩ (typ. 5.5kΩ); eliminates need for external resistor, simplifying BOM and layout. |
Pinout & Package
DS1813-10/T&R is supplied in RoHS-compliant SOT-23 surface-mount package (3-pin, 1.3mm x 2.9mm footprint), optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-Low Reset Output | Open-drain output requiring external pullup if interfacing with non-5V-tolerant logic; sinks up to 10mA. |
| VCC | Power Supply Input | Accepts 1.2V–5.5V; powers internal reference, comparator, and timing circuitry. |
| GND | Ground Reference | Return path for all internal circuits; must be connected to system ground plane for stable threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Trigger Reset Logic | Simultaneous monitoring of VCC dropout and manual pushbutton press ensures fail-safe recovery from both power faults and operator intervention. |
| Precision Voltage Threshold | 4.35V ±10% (DS1813-10) with temperature compensation maintains accuracy across -40°C to +85°C without calibration. |
| Integrated Pullup Resistor | 5.5kΩ internal pullup eliminates discrete component, reducing board area and assembly cost in high-volume designs. |
| Low Quiescent Current | 40µA max ICC enables use in always-on systems powered by coin cells or energy-harvesting sources. |
Applications
| Industrial PLC Controller | Smart Metering Module |
|---|---|
Use Scenario: Power interruption during firmware update causes partial write corruption in flash memory. IC Role / Device Role / Timing Role: DS1813-10/T&R monitors 5V rail and asserts reset within 5µs of undervoltage, halting CPU execution before invalid code executes. Use Value: Prevents bricking by ensuring full reset before power collapse, leveraging 150ms timeout to guarantee clean restart after brownout recovery. | Use Scenario: Field technician initiates emergency meter reset via front-panel button without powering down. IC Role / Device Role / Timing Role: DS1813-10/T&R detects RST pin pull-down and generates 150ms controlled reset pulse, synchronizing MCU reboot with hardware state clearance. Use Value: Eliminates need for debounced switch circuitry or GPIO-driven software reset, reducing firmware complexity and BOM count. |
| Point-of-Sale Terminal | Network Router Control Board |
Use Scenario: Unstable AC-DC adapter causes repeated 5V rail sag during transaction processing. IC Role / Device Role / Timing Role: DS1813-10/T&R holds reset active until VCC stabilizes above 4.49V and sustains 150ms timeout, preventing erratic boot sequences. Use Value: Ensures deterministic startup by enforcing minimum power-good hold time, avoiding race conditions between power rail and clock initialization. | Use Scenario: Hot-swap power module insertion causes transient VCC dip on control plane. IC Role / Device Role / Timing Role: DS1813-10/T&R triggers reset on VCC drop below 4.25V and maintains RST low for 150ms post-recovery, allowing PHY and MAC layers to reinitialize coherently. Use Value: Guarantees full system reset instead of partial hang, improving field reliability in modular power architectures. |
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 | Fixed 3.08V reset threshold; no pushbutton monitoring; 140ms reset timeout. | Suitable only for 3.3V systems; lacks manual reset input functionality. | Select when supervising 3.3V MCUs without external reset button requirement. |
| TPS3808G15DBVR | Adjustable threshold (via external resistor); 200ms reset timeout; higher 12µA quiescent current. | Requires external components for threshold setting; better suited for custom voltage rails. | Choose for non-standard supply voltages where programmability outweighs BOM simplicity. |
Compared with MAX809SEUR+T and TPS3808G15DBVR, DS1813-10/T&R uniquely combines fixed 5V-compatible threshold, integrated pushbutton support, and zero-external-component operation-making it optimal for cost-sensitive, space-constrained 5V microcontroller reset applications requiring dual-trigger reliability.
Availability
DS1813-10/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering modules, and point-of-sale terminals requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for DS1813-10/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 and mixed-signal ICs for industrial, communications, and computing applications, emphasizing reliability, integration, and low-power operation.
The DS1813-10/T&R belongs to Maxim's EconoReset family of supervisory circuits, engineered specifically for cost-effective, single-chip microprocessor reset solutions in 5V embedded systems with manual override capability.
FAQ
What is the exact VCC trip point range for DS1813-10/T&R?
The DS1813-10/T&R has a guaranteed VCC trip point range of 4.25V (minimum) to 4.49V (maximum), corresponding to its ±10% tolerance designation. This range is specified over the full operating temperature range (-40°C to +85°C) and ensures robust reset activation before most 5V microcontrollers fall outside their valid supply window. The nominal threshold is 4.35V.
Does DS1813-10/T&R require an external pullup resistor on the RST pin?
No, DS1813-10/T&R includes an internal 5.5kΩ pullup resistor (3.5–7.5kΩ range) on the open-drain RST output, eliminating the need for an external component. This simplifies design and reduces BOM count. External pullups are only required if interfacing with logic families needing stronger pullup or different voltage levels.
How does DS1813-10/T&R handle pushbutton reset timing?
DS1813-10/T&R detects a pushbutton press when the RST pin is pulled low for ≥1µs and asserts reset immediately. Upon button release, it holds RST low for 100–300ms (typically 150ms), providing a clean, debounced reset pulse. This timing is independent of the power-monitoring path and ensures reliable manual reset across varying switch contact bounce characteristics.
What is the maximum supply voltage the DS1813-10/T&R can tolerate on the VCC pin?
The DS1813-10/T&R has an absolute maximum VCC rating of +7.0V, but its recommended operating range is 1.2V to 5.5V. Operation above 5.5V may cause functional failure or accelerated degradation. For 5V systems, the device is rated for continuous operation up to 5.5V with full parameter guarantees across temperature.
Can DS1813-10/T&R be used in 3.3V systems?
No, DS1813-10/T&R is specifically designed for 5V systems with a 4.25–4.49V trip point. Using it in a 3.3V system would result in immediate, permanent reset assertion since VCC remains below the threshold. For 3.3V supervision, select DS1813-33 or alternatives like MAX809SEUR+T with appropriate threshold.
DS1813-10/T&R 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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.35V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1813-10/T&R FAQ
1.How can I place an order for DS1813-10/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1813-10/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 DS1813-10/T&R reliable?
The price and inventory of DS1813-10/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 DS1813-10/T&R is usually 5 days.
3.What payment methods are accepted for DS1813-10/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1813-10/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1813-10/T&R?
DS1813-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1813-10/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 DS1813-10/T&R?
For technical support, including DS1813-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1813-10/T&R requirements.
6.How does Aetrix verify that DS1813-10/T&R is sourced from the original manufacturer or authorized distributors?
All DS1813-10/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 DS1813-10/T&R meets industry standards.
7.What is the process for return or replacement of DS1813-10/T&R?
All DS1813-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1813-10/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 DS1813-10/T&R part is unused and in its original packaging.
Return procedure for DS1813-10/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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