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Analog Devices Inc./Maxim Integrated DS1817-5
- Part No.:
- DS1817-5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1817-5.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,810
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Product details
Overview
DS1817-5 from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with active-high push-pull output, designed for microprocessor supervision in 3.0V systems. It features a VCC trip point of 2.98–3.15 V, 150 ms reset timeout, ±5% trip accuracy, and operates from –40°C to +85°C in TO-92 or SOT-23 packages.
For engineers reviewing the DS1817-5 datasheet, DS1817-5 pinout, DS1817-5 application, or DS1817-5 equivalent, key selection criteria include trip voltage tolerance (5%), reset assertion timing during power-up/down, push-pull output drive capability, compatibility with 3.0V supply rails, and package options for through-hole or surface-mount deployment.
Technical Context
The DS1817-5 uses an internal temperature-compensated voltage reference and comparator to continuously monitor VCC against its factory-trimmed 5% trip threshold. When VCC falls below the lower limit (2.98 V), RST asserts immediately; upon recovery, RST remains active for 100–250 ms to ensure system stabilization.
Its CMOS push-pull output drives high to VCC (VOH = VCC – 0.1 V typical) with 350 µA source current and sinks up to 10 mA, eliminating external pull-up resistors. The device draws only 28–35 µA quiescent current and tolerates VCC up to 5.5 V while maintaining specified performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.98 V (min) to 3.15 V (max); precise detection window for 3.0 V nominal supply rails |
| Reset Timeout | 100–250 ms after VCC recovery; ensures stable power and processor initialization before release |
| Output Type | Push-pull active-high; eliminates need for external pull-up resistor and supports direct MCU reset input |
| Supply Range | 0 V to 5.5 V; allows operation across 1.2 V to 5.5 V supplies while monitoring 3.0 V rail |
| Quiescent Current | 28–35 µA; enables low-power supervision in battery-backed or energy-constrained systems |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded control and instrumentation environments |
| Output Drive | Sources 350 µA at VOH = VCC – 0.1 V; sinks 10 mA at VOL ≤ 0.4 V; compatible with standard logic inputs |
Pinout & Package
DS1817-5 is available in both TO-92 (through-hole) and SOT-23 (surface-mount) packages. Both variants share identical 3-pin configuration and pin functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TO-92) / 1 (SOT-23) | RST | Active-high push-pull reset output; asserts when VCC is out-of-tolerance and holds for ≥100 ms after recovery |
| 2 (TO-92) / 2 (SOT-23) | VCC | Power supply input; monitored rail; supports 0–5.5 V operation with trip detection centered at 3.0 V |
| 3 (TO-92) / 3 (SOT-23) | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| 5% VCC trip accuracy | Factory-trimmed threshold ensures reliable detection of 3.0 V supply deviations without calibration |
| 150 ms typ. reset timeout | Guaranteed minimum hold time prevents premature processor release during power ramp-up |
| Push-pull CMOS output | Eliminates external pull-up components and reduces BOM count in space-constrained designs |
| Temperature-compensated reference | Maintains trip point stability over –40°C to +85°C, critical for unregulated industrial environments |
| Low 28–35 µA supply current | Enables continuous supervision in always-on subsystems without impacting system power budget |
Applications
| Industrial PLC I/O Module | Smart Meter Power Supervision |
|---|---|
Use Scenario: Monitors 3.0 V auxiliary supply powering FPGA configuration and real-time clock in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high reset to FPGA and RTC during brownout or cold start. Use Value: Prevents metastability and configuration corruption by holding reset until 3.0 V rail stabilizes for ≥150 ms. | Use Scenario: Ensures reliable boot sequence in utility smart meters using 3.0 V microcontroller supply derived from switched-mode converter. IC Role / Device Role / Timing Role: Reset generator triggered by 3.0 V rail deviation, synchronized to meter's power-fail interrupt handler. Use Value: Guarantees deterministic restart after line transients, meeting ANSI C12.1 and IEC 62056 compliance requirements. |
| Medical Sensor Node | POS Terminal Power Management |
Use Scenario: Supervises 3.0 V supply for ultra-low-power BLE sensor hub in portable diagnostic equipment. IC Role / Device Role / Timing Role: Active-high reset source tied to MCU's nRESET pin, activated on supply sag below 2.98 V. Use Value: Avoids firmware lockup during battery voltage droop by enforcing clean restart with guaranteed 100–250 ms hold time. | Use Scenario: Provides fail-safe reset for ARM-based payment terminal powered from 3.0 V LDO with variable load profiles. IC Role / Device Role / Timing Role: System-level power monitor interfacing directly to processor reset controller with no external biasing. Use Value: Reduces component count and PCB area via integrated push-pull output, supporting compact dual-layer board layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–MAX6328 series | Same 3.0 V trip variants; tighter 2.5% tolerance option; higher ICC (15 µA vs 30 µA typ) | Designed for higher-reliability industrial/commercial use with extended qualification testing | Preferred where tighter trip accuracy or AEC-Q200 qualification is required |
| TPS3808G33 | 3.3 V nominal trip (3.06–3.54 V range); open-drain output; requires external pull-up | Targeted at 3.3 V systems; lacks native 3.0 V trip point and push-pull drive | Only suitable if system can accommodate 3.3 V trip margin and add pull-up resistor |
Compared with MAX6326–MAX6328, DS1817-5 offers lower cost and simpler integration via push-pull output but trades off trip accuracy; versus TPS3808G33, DS1817-5 delivers exact 3.0 V trip alignment and eliminates external components-critical for cost-sensitive 3.0 V microcontroller supervision.
Availability
DS1817-5 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart meter power supervision, medical sensor nodes, and POS terminal power management requiring stable component supply and long-term manufacturability.
Supply support for DS1817-5 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 DS1817-5 belongs to Maxim's EconoReset family-low-cost, single-supply voltage supervisors targeting cost-sensitive microprocessor reset applications in 3.0 V and 3.3 V systems.
FAQ
What is the exact VCC trip voltage range for DS1817-5?
The DS1817-5 has a guaranteed VCC trip point range of 2.98 V (minimum) to 3.15 V (maximum) at –40°C to +85°C. This 5% tolerance window is factory-trimmed and temperature-compensated, ensuring accurate detection of out-of-tolerance conditions on 3.0 V supply rails without external calibration. DS1817-5 maintains this specification across its full operating temperature range.
Does DS1817-5 require an external pull-up resistor on the RST pin?
No, DS1817-5 does not require an external pull-up resistor because it features a push-pull active-high output stage. The RST pin drives high to VCC – 0.1 V (typical) and low to ≤0.4 V, enabling direct connection to standard CMOS reset inputs. This eliminates BOM components and simplifies layout-unlike open-drain alternatives such as TPS3808G33, which mandate external pull-up networks.
How long does DS1817-5 hold the reset signal active after VCC returns to tolerance?
DS1817-5 holds the RST signal active for 100–250 ms after VCC rises above the trip threshold, with 150 ms typical. This guaranteed minimum timeout ensures sufficient stabilization time for both the 3.0 V power rail and attached microprocessor before release. The timing is internally generated and independent of external capacitors or resistors, providing consistent behavior across units and temperatures.
Can DS1817-5 operate with supply voltages other than 3.0 V?
Yes, DS1817-5 operates with VCC from 0 V to 5.5 V while monitoring a 3.0 V rail. Its internal reference and comparator function correctly across this full supply range, making it suitable for systems where the monitored 3.0 V rail is derived from higher-voltage sources (e.g., 5 V or 3.3 V LDOs). However, the trip point remains fixed at ~3.0 V-DS1817-5 is not adjustable or reconfigurable.
What package options are available for DS1817-5?
DS1817-5 is offered in two industry-standard packages: TO-92 (through-hole) and SOT-23 (surface-mount). Both packages have identical 3-pin assignments (RST, VCC, GND) and electrically equivalent performance. The TO-92 variant supports manual assembly and prototyping, while the SOT-23 enables high-density automated PCB assembly-giving designers flexibility without compromising functionality or specifications.
DS1817-5 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:
- 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
DS1817-5 FAQ
1.How can I place an order for DS1817-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1817-5 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 DS1817-5 reliable?
The price and inventory of DS1817-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1817-5 is usually 5 days.
3.What payment methods are accepted for DS1817-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1817-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1817-5?
DS1817-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1817-5 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 DS1817-5?
For technical support, including DS1817-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1817-5 requirements.
6.How does Aetrix verify that DS1817-5 is sourced from the original manufacturer or authorized distributors?
All DS1817-5 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 DS1817-5 meets industry standards.
7.What is the process for return or replacement of DS1817-5?
All DS1817-5 units undergo pre-shipment inspection (PSI). If there is an issue with DS1817-5, 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 DS1817-5 part is unused and in its original packaging.
Return procedure for DS1817-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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