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Analog Devices Inc./Maxim Integrated DS1811-5
- Part No.:
- DS1811-5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1811-5.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,364
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Product details
Overview
DS1811-5 from Maxim Integrated (now Analog Devices) is a 5V precision voltage supervisor IC with open-drain active-low reset output, VCC trip point of 4.50–4.75 V, 150 ms reset timeout, and -40°C to +85°C operating range. It monitors power supply integrity and automatically resets microprocessors during brownout or startup.
For engineers reviewing the DS1811-5 datasheet, DS1811-5 pinout, DS1811-5 application, or DS1811-5 equivalent, key selection criteria include guaranteed VCC threshold tolerance (±2.5% typical), internal 5.5 kΩ pull-up resistor, low 40 µA operating current, and dual TO-92/SOT-23 package support for space-constrained embedded systems.
Technical Context
The DS1811-5 integrates a temperature-compensated bandgap reference and comparator to detect VCC deviations below its factory-trimmed 4.62 V nominal trip point. Its internal timing circuit ensures RST remains asserted for 100–300 ms after VCC recovery, independent of external components.
It operates across 1.2 V to 5.5 V supply range but is specified for 5 V systems; the open-drain RST output sinks up to 10 mA at 0.4 V and interfaces directly with TTL/CMOS inputs without external pull-up in many designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.50–4.75 V - guarantees reliable reset assertion before 5 V system logic fails |
| Reset Timeout | 100–300 ms - holds processor in reset long enough for power and clock stabilization |
| Operating Current | 30–40 µA - enables always-on monitoring with negligible impact on battery or standby power |
| Output Drive | 10 mA sink @ 0.4 V - supports direct interface to microcontroller reset pins without level-shifting |
| Internal Pull-Up | 3.5–7.5 kΩ - eliminates need for external resistor in basic applications |
| Temp Range | -40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
DS1811-5 is available in TO-92 and SOT-23 packages, both with identical 3-pin configuration and pin-compatible layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Asserts low during power fault or startup; requires external pull-up only if driving high-capacitance bus |
| VCC | Power supply input | Monitored supply rail; device draws current only from this pin |
| GND | Ground reference | Common return path for reference, comparator, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage detection | Factory-trimmed 4.62 V trip point with ±2.5% tolerance over temperature ensures consistent reset behavior across 5 V systems |
| Guaranteed reset timeout | 150 ms typical active-reset duration prevents premature processor release before power stabilization |
| Integrated pull-up resistor | 5.5 kΩ internal pull-up reduces BOM count and PCB area versus discrete resistor solutions |
| Low quiescent current | 40 µA max ICC enables use in battery-backed or energy-sensitive applications without compromising supervision reliability |
Applications
| Industrial PLC Controller | Embedded Metering Device |
|---|---|
Use Scenario: Power interruption during firmware update causes corrupted memory or inconsistent state. IC Role / Device Role / Timing Role: DS1811-5 asserts RST within microseconds of VCC drop below 4.5 V and holds it for ≥100 ms after recovery. Use Value: Ensures deterministic cold boot and prevents partial execution of critical routines. | Use Scenario: Mains-powered smart meter experiences voltage sags due to grid fluctuations. IC Role / Device Role / Timing Role: DS1811-5 monitors 5 V rail derived from AC-DC converter and triggers hardware reset before ADC or RTC errors occur. Use Value: Maintains data integrity and timekeeping accuracy during transient brownouts. |
| Medical Diagnostic Handheld | Automotive Body Control Module |
Use Scenario: Battery voltage dips during cold cranking or accessory load surge. IC Role / Device Role / Timing Role: DS1811-5 detects sub-4.5 V condition on 5 V logic rail and forces microcontroller reset before register corruption. Use Value: Eliminates uncontrolled behavior that could compromise safety-critical UI or sensor sampling. | Use Scenario: Load-dump transients or alternator ripple cause intermittent logic faults in interior lighting control. IC Role / Device Role / Timing Role: DS1811-5 provides robust 5 V supervision with -40°C to +85°C rating and fast VCC-to-RST response (<5 µs). Use Value: Prevents latch-up or spurious command execution without adding thermal derating margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–46D | 4.63 V trip point, 140 ms min reset timeout, 1.2 µA max quiescent current | Lower ICC enables ultra-low-power battery operation; no internal pull-up resistor | Select when minimizing standby current is critical and external pull-up is acceptable |
| TPS3808G33 | 3.3 V fixed trip, adjustable delay (0–10 s), 1.2 µA ICC, push-pull output | Designed for 3.3 V systems; lacks 5 V trip point and internal pull-up | Choose only for 3.3 V rails; requires redesign of reset interface and timing |
Compared with MAX6326–46D and TPS3808G33, the DS1811-5 offers integrated pull-up and tighter trip tolerance for 5 V systems but consumes higher quiescent current-making it optimal for cost-sensitive industrial controllers where board space and component count outweigh ultra-low-power needs.
Availability
DS1811-5 is available at Aetrix Electronics and suitable for industrial PLC controllers, embedded metering devices, and medical handheld diagnostics requiring stable component supply and long-term manufacturability.
Supply support for DS1811-5 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
Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The DS1811-5 belongs to the EconoReset™ family of voltage supervisors, engineered to replace discrete reset circuits in cost-sensitive 5 V microprocessor systems while maintaining guaranteed timing and temperature stability.
FAQ
What is the exact VCC trip point range for DS1811-5?
The DS1811-5 has a guaranteed VCC trip point range of 4.50 V to 4.75 V, with a typical value of 4.62 V. This specification is factory-trimmed and tested across the full -40°C to +85°C operating temperature range, ensuring consistent reset activation before standard 5 V logic thresholds degrade.
Does DS1811-5 require an external pull-up resistor on the RST pin?
No, DS1811-5 includes an internal pull-up resistor of 3.5–7.5 kΩ, eliminating the need for an external component in most applications. However, if driving high-capacitance buses or interfacing with low-threshold inputs, an external pull-up may be added to improve rise time or noise immunity-though not required for basic functionality.
Can DS1811-5 be used in 3.3 V systems?
No, DS1811-5 is specifically designed for 5 V systems with a nominal 4.62 V trip point. Using it in a 3.3 V environment would result in continuous reset assertion, as VCC remains below the minimum trip threshold. For 3.3 V supervision, select a part like TPS3808G33 or MAX6326–33.
What is the maximum sink current capability of the DS1811-5 RST output?
The DS1811-5 RST output can sink up to 10 mA while maintaining ≤0.4 V at the pin, verified at VCC = 2.7 V. This allows direct connection to most microcontroller reset inputs without additional buffering, supporting reliable reset signaling even under moderate capacitive loading.
How does DS1811-5 handle rapid power supply fluctuations?
The DS1811-5 incorporates hysteresis and slew-rate filtering to reject short-duration glitches: VCC must remain below the trip threshold for >2 µs before asserting RST, and recovery requires VCC to exceed VCCTP(MIN) for >100 ms before releasing reset-preventing chatter during noisy or oscillating supply conditions.
DS1811-5 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:
- 4.62V
- 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
DS1811-5 FAQ
1.How can I place an order for DS1811-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1811-5 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 DS1811-5 reliable?
The price and inventory of DS1811-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1811-5 is usually 5 days.
3.What payment methods are accepted for DS1811-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1811-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1811-5?
DS1811-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1811-5 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 DS1811-5?
For technical support, including DS1811-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1811-5 requirements.
6.How does Aetrix verify that DS1811-5 is sourced from the original manufacturer or authorized distributors?
All DS1811-5 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 DS1811-5 meets industry standards.
7.What is the process for return or replacement of DS1811-5?
All DS1811-5 units undergo pre-shipment inspection (PSI). If there is an issue with DS1811-5, 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 DS1811-5 part is unused and in its original packaging.
Return procedure for DS1811-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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