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Analog Devices Inc./Maxim Integrated DS1815-5+T&R
- Part No.:
- DS1815-5+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1815-5+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,626
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Product details
Overview
DS1815-5+T&R from Maxim Integrated (now Analog Devices) is a precision 3.3V supply voltage supervisor IC with push-pull active-low reset output, 150ms reset timeout, ±5% VCC trip accuracy (2.98V–3.15V), and -40°C to +85°C operation-used for microprocessor power-fail detection and safe system boot in embedded controllers.
For engineers reviewing the DS1815-5+T&R datasheet, DS1815-5+T&R pinout, DS1815-5+T&R application, or DS1815-5+T&R equivalent, key selection criteria include guaranteed 150ms reset assertion after VCC recovery, push-pull output capable of sourcing 350µA at 2.4V and sinking 10mA at 0.4V, and precise 5% VCC threshold tolerance for reliable 3.3V rail monitoring.
Technical Context
The DS1815-5+T&R integrates a temperature-compensated bandgap reference and comparator to continuously monitor VCC against a fixed 5%-tolerance threshold (2.98V–3.15V). It asserts RST low on out-of-tolerance detection and holds it active for 100–250ms after VCC returns to spec-guaranteeing stabilization time for microprocessors and power supplies.
Its push-pull CMOS output eliminates external pull-up resistors, supports direct interface to TTL/CMOS inputs, and operates across full VCC range (0–5.5V) while drawing only 28–35µA quiescent current-enabling low-power, space-constrained applications without discrete supervision circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.98V (min) to 3.15V (max); ensures reliable reset activation on 3.3V rail droop below 3.06V ±5% |
| Reset Timeout | 100–250ms; guarantees processor and power supply stabilization before release |
| Output Type | Push-pull CMOS; eliminates need for external pull-up resistor and supports direct logic interfacing |
| Supply Current | 28–35µA; enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded and automotive control environments |
| RST Sink/Source | Sinks 10mA at 0.4V / sources 350µA at 2.4V; drives standard logic inputs without buffering |
Pinout & Package
DS1815-5+T&R is supplied in SOT-23 surface-mount package (3-pin, 1.3mm × 2.9mm footprint) with JEDEC-standard pinout and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Push-pull CMOS signal asserted low during power fault or startup; releases high after timeout |
| 2 (VCC) | Power supply input | Monitored rail input; operates from 0V to 5.5V; internal reference derived from this pin |
| 3 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| 150ms guaranteed reset hold time | Ensures stable power and processor initialization before system release-no external timing components required |
| ±5% VCC trip accuracy | Matches 3.3V system margin requirements precisely; avoids false resets or missed faults |
| Push-pull output architecture | Eliminates external pull-up resistor, reduces BOM count, and improves noise immunity vs. open-drain alternatives |
| Temperature-compensated reference | Maintains trip point stability over -40°C to +85°C-critical for unregulated or thermally varying environments |
Applications
| Industrial PLC Controller | Smart Meter Power Management |
|---|---|
Use Scenario: Power interruption detection during utility grid fluctuations or brownouts. IC Role / Device Role / Timing Role: Voltage supervisor generating active-low reset to halt MCU execution until 3.3V rail stabilizes post-recovery. Use Value: Prevents corrupted firmware writes or inconsistent state transitions by enforcing 150ms minimum reset hold after VCC restoration. | Use Scenario: Battery-backed real-time clock and metrology IC operation during main supply loss. IC Role / Device Role / Timing Role: Monitors 3.3V auxiliary rail and asserts RST to initiate controlled shutdown and data save routines. Use Value: Accurate ±5% trip point ensures early warning before critical undervoltage, enabling safe nonvolatile memory backup. |
| Embedded Gateway Boot Sequencing | Automotive Body Control Module |
Use Scenario: Multi-rail power-up coordination where 3.3V logic must stabilize before peripheral initialization. IC Role / Device Role / Timing Role: Standalone reset generator triggered solely by 3.3V rail status-no software or external timing needed. Use Value: Push-pull output directly drives FPGA configuration enable or microcontroller RESET_N pin without level-shifting or pull-up. | Use Scenario: Monitoring 3.3V domain powering CAN transceivers and sensor interfaces in 12V vehicle systems. IC Role / Device Role / Timing Role: Fault-detection element in ASIL-B supporting subsystems requiring deterministic reset behavior. Use Value: -40°C to +85°C rating and 28–35µA ICC ensure reliable operation across automotive thermal cycles and low-quiescent design goals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | Adjustable threshold via external resistor divider; 200ms fixed timeout; higher ICC (1.2µA typ) | Requires external components for 3.3V setting; better for multi-rail or programmable designs | Select when flexibility in trip point or longer timeout is needed; not drop-in for DS1815-5+T&R |
| MAX6326UT29D3+ | Fixed 2.93V threshold (±2.5%); 200ms timeout; open-drain output; higher sink current (20mA) | Requires pull-up resistor; tighter threshold tolerance but lower voltage target | Choose for higher sink drive or tighter accuracy; verify compatibility with existing pull-up network |
Compared with TPS3808G01DBVR and MAX6326UT29D3+, the DS1815-5+T&R offers simpler integration (no external resistors), optimized 3.3V ±5% trip point, and push-pull output-making it ideal for cost-sensitive, space-constrained 3.3V microcontroller reset applications where fixed functionality suffices.
Availability
DS1815-5+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart meter power management, embedded gateway boot sequencing, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for DS1815-5+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
Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications systems-with emphasis on reliability, accuracy, and integration.
The DS1815-5+T&R belongs to Maxim's EconoReset™ family of voltage supervisors, engineered specifically for cost-effective, single-supply reset generation in microprocessor-based systems with minimal external components.
FAQ
What is the exact VCC trip voltage range for DS1815-5+T&R?
The DS1815-5+T&R has a guaranteed VCC trip point range of 2.98V (minimum) to 3.15V (maximum) at -40°C to +85°C, corresponding to a nominal 3.06V threshold with ±5% tolerance. This range is specified in the DC Electrical Characteristics table and applies directly to the DS1815-5+T&R variant-no calibration or external adjustment is required.
Does DS1815-5+T&R require an external pull-up resistor on the RST pin?
No, DS1815-5+T&R does not require an external pull-up resistor because it features a push-pull CMOS output stage. The RST pin actively drives high or low depending on reset state, eliminating reliance on external biasing-unlike open-drain supervisors. This simplifies layout and reduces BOM count for the DS1815-5+T&R implementation.
What is the reset timeout duration for DS1815-5+T&R after VCC recovery?
The DS1815-5+T&R holds the RST pin active low for 100ms (minimum) to 250ms (maximum) after VCC returns to within tolerance. The typical value is 150ms, ensuring sufficient stabilization time for microprocessors and power supplies before releasing reset-this timing is internally generated and requires no external components for the DS1815-5+T&R.
Can DS1815-5+T&R operate with VCC below 3.0V?
Yes, DS1815-5+T&R functions down to 0V on VCC and remains operational across 0V to 5.5V. Its internal reference and comparator continue monitoring even during brownout conditions, and RST stays asserted until VCC rises above the 2.98V–3.15V trip window-making the DS1815-5+T&R suitable for deep undervoltage detection and zero-volt valid reset assertion.
Is DS1815-5+T&R pin-compatible with other DS181x series devices?
Yes, DS1815-5+T&R shares identical SOT-23 and TO-92 pinouts with DS1810 through DS1818 family members-pin 1 is RST, pin 2 is VCC, and pin 3 is GND across all variants. However, trip voltages differ (e.g., DS1815-5 = 3.06V ±5%, DS1815-10 = 2.88V ±10%), so substitution requires verification of threshold match for the DS1815-5+T&R application.
DS1815-5+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:
- 3.06V
- Output:
- Push-Pull, Totem Pole
- 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
DS1815-5+T&R FAQ
1.How can I place an order for DS1815-5+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1815-5+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 DS1815-5+T&R reliable?
The price and inventory of DS1815-5+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 DS1815-5+T&R is usually 5 days.
3.What payment methods are accepted for DS1815-5+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1815-5+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1815-5+T&R?
DS1815-5+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1815-5+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 DS1815-5+T&R?
For technical support, including DS1815-5+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1815-5+T&R requirements.
6.How does Aetrix verify that DS1815-5+T&R is sourced from the original manufacturer or authorized distributors?
All DS1815-5+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 DS1815-5+T&R meets industry standards.
7.What is the process for return or replacement of DS1815-5+T&R?
All DS1815-5+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1815-5+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 DS1815-5+T&R part is unused and in its original packaging.
Return procedure for DS1815-5+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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