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Analog Devices Inc./Maxim Integrated DS1816-5+
- Part No.:
- DS1816-5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1816-5+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,485
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Product details
Overview
DS1816-5+ from Maxim Integrated (now Analog Devices) is a precision 3.0V ±5% supply voltage supervisor IC with open-drain active-low reset output, 150ms reset timeout, and internal 5kΩ pull-up resistor, used for microprocessor power-on reset and brown-out detection in embedded systems.
For engineers reviewing the DS1816-5+ datasheet, DS1816-5+ pinout, DS1816-5+ application, or DS1816-5+ equivalent, key selection criteria include VCC trip point accuracy (2.98–3.15V), guaranteed 100–250ms reset pulse width, operating temperature range (–40°C to +85°C), TO-92/SOT-23 package options, and compatibility with 3V/3.3V logic systems.
Technical Context
The DS1816-5+ integrates a temperature-compensated bandgap voltage reference and comparator to monitor VCC against a fixed 3.0V threshold with ±5% tolerance. It asserts RST low on undervoltage or power failure and holds it active for ≥100ms after VCC returns to spec.
Its open-drain output drives external logic with an internal 5kΩ pull-up, eliminating need for discrete resistors in many designs. The device operates from 1.2V to 5.5V supply and draws only 28–35µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.98V to 3.15V - precise 3.0V ±5% detection threshold for 3.3V system brown-out monitoring |
| Reset Pulse Width | 100–250ms - guarantees sufficient stabilization time for microprocessor power-up sequencing |
| Output Type | Open-drain with internal 5kΩ pull-up - enables wired-OR reset bus configuration without external resistor |
| Supply Range | 1.2V to 5.5V - supports operation across 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Quiescent Current | 28–35µA - ultra-low power consumption suitable for battery-backed and always-on systems |
| Operating Temp | –40°C to +85°C - industrial-grade thermal performance for embedded control environments |
Pinout & Package
DS1816-5+ is available in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Pin functions are identical across both variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST (Pin 1) | Active-low open-drain reset output | Drives external microprocessor / logic reset input; requires external pull-up only if internal 5kΩ is insufficient for load |
| VCC (Pin 2) | Power supply input | Supplies internal reference and comparator; accepts 1.2V–5.5V, enabling use in mixed-voltage systems |
| GND (Pin 3) | Ground reference | Common return path for reference circuitry and output stage; must be low-impedance for accurate trip point |
Key Features
| Feature | Design Value |
|---|---|
| Precision ±5% VCC monitoring | Enables reliable reset assertion at 2.98–3.15V, matching 3.3V system tolerance requirements without calibration |
| 150ms typ. reset timeout | Ensures microprocessor and peripheral power rails stabilize before release, preventing boot failures |
| Internal 5kΩ pull-up resistor | Reduces BOM count and PCB area by eliminating external pull-up in standard 3.3V reset bus configurations |
| –40°C to +85°C operation | Validates functionality across full industrial temperature range without derating or thermal compensation |
| Low 35µA max ICC | Minimizes standby power draw in battery-powered or energy-sensitive applications such as IoT edge nodes |
Applications
| Industrial PLC Controller | Smart Metering Module |
|---|---|
Use Scenario: Power interruption during firmware update or sensor data logging. IC Role / Device Role / Timing Role: Voltage supervisor generating clean, timed reset pulse to prevent corrupted flash writes or register state loss. Use Value: Guaranteed 100–250ms reset hold ensures CPU and memory subsystems fully reinitialize before code execution resumes. | Use Scenario: Mains voltage sag or backup battery transition in utility meter. IC Role / Device Role / Timing Role: Brown-out detector asserting RST when VCC drops below 2.98V, protecting EEPROM integrity during power transitions. Use Value: ±5% trip accuracy matches IEC 62053-21 voltage tolerance specs for Class 1 metering accuracy compliance. |
| Medical Diagnostic Sensor Node | Automotive Body Control Module (BCM) |
Use Scenario: Cold-start battery voltage ramp-up in portable ultrasound or ECG unit. IC Role / Device Role / Timing Role: Power-on reset generator holding RST active until regulated 3.3V rail reaches stable condition. Use Value: Internal 5kΩ pull-up eliminates need for external component, reducing risk of solder joint failure in vibration-prone handheld enclosures. | Use Scenario: Ignition cycling causing transient dips in 12V-to-3.3V DC/DC output. IC Role / Device Role / Timing Role: Supervisory watchdog ensuring MCU resets cleanly after each engine start event. Use Value: –40°C to +85°C rating and 2.98–3.15V trip window align with AEC-Q100 Grade 3 ambient and supply requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–30D3+ | Same 3.0V ±5% trip, but push-pull output (no internal pull-up); 140ms min reset timeout | Requires external pull-up for wired-OR; better suited for high-speed reset propagation | Select when driving multiple loads simultaneously or needing faster rise time than open-drain allows |
| TPS3808G30DBVR | 3.0V ±2% trip (tighter tolerance); adjustable reset delay up to 200ms; 1.5µA quiescent current | Higher accuracy and lower power, but no internal pull-up and SOT-23-only packaging | Select when ±2% trip precision or sub-µA standby current is critical, and external pull-up is acceptable |
Compared with MAX6326–30D3+ and TPS3808G30DBVR, the DS1816-5+ offers integrated pull-up and proven industrial reliability in dual-package formats, making it optimal for cost-sensitive, space-constrained 3.3V systems where ±5% trip accuracy suffices.
Availability
DS1816-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering modules, medical diagnostic sensor nodes, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for DS1816-5+ 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 applications.
The DS1816-5+ belongs to Maxim's EconoReset™ family of low-cost, single-supply voltage supervisors targeting cost-optimized embedded systems requiring robust power-on and brown-out reset functionality.
FAQ
What is the exact VCC trip voltage range for DS1816-5+?
The DS1816-5+ has a guaranteed VCC trip point of 2.98V to 3.15V at –40°C to +85°C, corresponding to 3.0V ±5%. This range is specified in the DC Electrical Characteristics table and validated across temperature and supply conditions. The DS1816-5+ uses a precision temperature-compensated reference to maintain this accuracy without external calibration.
Does DS1816-5+ require an external pull-up resistor on the RST pin?
No - DS1816-5+ includes an internal 5kΩ pull-up resistor on the open-drain RST output. An external pull-up is only needed if the load capacitance or sink current exceeds design limits (e.g., >10pF or >10mA). Most 3.3V microprocessor reset inputs operate reliably with the internal pull-up alone.
Can DS1816-5+ be used with a 5V supply rail?
Yes - DS1816-5+ operates over 1.2V to 5.5V, so it can monitor 5V supplies. However, its trip point remains fixed at ~3.0V ±5%, meaning it will assert reset when VCC falls below 2.98V. For true 5V supervision, a DS1816-20+ (2.55V nominal trip) or dedicated 5V supervisor is recommended.
What is the minimum reset pulse width guaranteed by DS1816-5+?
The DS1816-5+ guarantees a minimum reset pulse width of 100ms after VCC returns to tolerance, with typical value of 150ms and maximum of 250ms. This timing is specified under VCC = 2.7V to 3.3V and ensures sufficient stabilization time for most 8-bit and 32-bit microcontrollers before release.
Is DS1816-5+ available in both TO-92 and SOT-23 packages?
Yes - DS1816-5+ is offered in both TO-92 (through-hole) and SOT-23 (surface-mount) packages, with identical pinout (RST-VCC-GND) and electrical specifications. The TO-92 variant supports legacy prototyping and manual assembly, while SOT-23 enables high-density PCB layouts.
DS1816-5+ 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:
- 3.06V
- 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
DS1816-5+ FAQ
1.How can I place an order for DS1816-5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1816-5+ 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 DS1816-5+ reliable?
The price and inventory of DS1816-5+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1816-5+ is usually 5 days.
3.What payment methods are accepted for DS1816-5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1816-5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1816-5+?
DS1816-5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1816-5+ 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 DS1816-5+?
For technical support, including DS1816-5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1816-5+ requirements.
6.How does Aetrix verify that DS1816-5+ is sourced from the original manufacturer or authorized distributors?
All DS1816-5+ 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 DS1816-5+ meets industry standards.
7.What is the process for return or replacement of DS1816-5+?
All DS1816-5+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1816-5+, 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 DS1816-5+ part is unused and in its original packaging.
Return procedure for DS1816-5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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