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Analog Devices Inc./Maxim Integrated DS1816-5/T&R
- Part No.:
- DS1816-5/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1816-5/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,059
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Product details
Overview
DS1816-5/T&R 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 -40°C to +85°C operation-used to ensure reliable microprocessor startup and brownout recovery in embedded power management systems.
For engineers reviewing the DS1816-5/T&R datasheet, DS1816-5/T&R pinout, DS1816-5/T&R application, or DS1816-5/T&R equivalent, key selection criteria include VCC trip point accuracy (2.98V–3.15V), guaranteed 100–250ms reset pulse width, internal 5kΩ pull-up resistor, TO-92/SOT-23 package compatibility, and 28–35µA quiescent current under operating conditions.
Technical Context
The DS1816-5/T&R implements a temperature-compensated bandgap voltage reference and comparator architecture to monitor VCC against a fixed 3.0V threshold with ±5% tolerance. It asserts RST low on undervoltage detection and holds it active for ≥100ms after VCC returns to spec-ensuring stable processor initialization.
Its open-drain output supports wired-OR reset bus configurations and interfaces directly with microcontrollers requiring active-low reset signaling. The internal 5kΩ pull-up eliminates external components in many designs while maintaining compatibility with standard 3.3V logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.98V–3.15V (±5% at 3.0V nominal); ensures robust detection of 3.3V supply droop before system instability |
| Reset Pulse Width | 100–250ms; guarantees sufficient time for power rail and CPU clock stabilization post-power-up |
| Supply Current | 28–35µA; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Output Type | Open-drain with internal 3.5–7.5kΩ pull-up; simplifies interface to multiple processors or logic families without external resistors |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded control and automotive body electronics |
| Output Drive | 10mA sink capability at 0.4V; supports direct connection to standard CMOS/TTL reset inputs |
Pinout & Package
DS1816-5/T&R is available in both TO-92 and SOT-23 packages. Both variants share identical pin assignment: Pin 1 = RST (active-low open-drain reset output), Pin 2 = VCC (power supply input), Pin 3 = GND (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Drives low during power failure or startup; requires external pull-up only if internal 5kΩ is insufficient for target load |
| 2 (VCC) | Positive supply input | Monitored supply rail; operates from 1.2V to 5.5V but triggers at 3.0V ±5% for this variant |
| 3 (GND) | Ground reference | Common return path for internal reference and comparator; must be low-impedance for accurate trip point |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated voltage reference | Stabilizes trip point across -40°C to +85°C, eliminating calibration drift in thermal cycling environments |
| Factory-trimmed 5% tolerance | Guarantees VCC detection within 2.98V–3.15V without user adjustment or external resistors |
| 150ms minimum reset hold time | Meets JEDEC JESD78 reliability requirements for microprocessor reset assertion duration |
| Low quiescent current (28–35µA) | Reduces standby power in always-on systems such as smart sensors and IoT edge nodes |
| Open-drain output with internal pull-up | Enables shared reset bus topology and eliminates one external component in most 3.3V applications |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
Use Scenario: Power interruption during firmware update or metering data capture. IC Role / Device Role / Timing Role: Voltage supervisor ensuring controlled MCU reset and EEPROM write protection during brownout. Use Value: Prevents corrupted flash writes by holding reset until 3.3V rail stabilizes for ≥100ms post-recovery. | Use Scenario: Mains voltage sag below 90% nominal in residential grid monitoring. IC Role / Device Role / Timing Role: Real-time VCC monitor triggering safe shutdown sequence before ADC or RTC failure. Use Value: Accurate 3.0V ±5% trip point avoids nuisance resets during transient sags while catching true brownouts. |
| Automotive Body Control Unit | Medical Portable Diagnostic Device |
Use Scenario: Battery voltage dip during cold-cranking (<6V) causing ECU brownout. IC Role / Device Role / Timing Role: Supervisory reset generator interfacing with ARM Cortex-M0+ microcontroller. Use Value: -40°C to +85°C rating and 150ms reset pulse ensure deterministic restart after engine start cycles. | Use Scenario: Lithium coin-cell backup powering real-time clock during main power loss. IC Role / Device Role / Timing Role: Low-current supervisor enabling graceful state save before sleep mode entry. Use Value: 28–35µA ICC allows >5-year battery life in backup power path without compromising reset reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | Fixed 3.08V trip point (±0.5%), 200ms reset timeout, higher ICC (1.2µA typical), SOT-23 only | Higher accuracy and lower current, but lacks TO-92 option and requires external pull-up | Preferred where precision timing and ultra-low ICC outweigh package flexibility |
| MAX6326UT30D3+ | 3.0V ±2.5% trip, 140ms min reset, 1.6µA ICC, SOT-23 only, no internal pull-up | Tighter tolerance and lower power, but mandates external pull-up and offers no through-hole variant | Selected when board space is constrained and external BOM count is acceptable |
Compared with DS1816-5/T&R, TPS3808G01DBVR delivers tighter trip accuracy and lower ICC but sacrifices TO-92 support and internal pull-up convenience; MAX6326UT30D3+ improves tolerance and power efficiency yet requires added external components and eliminates through-hole assembly options.
Availability
DS1816-5/T&R is available at Aetrix Electronics and suitable for industrial control, smart metering, automotive body electronics, and portable medical devices requiring stable component supply across extended product lifecycles.
Supply support for DS1816-5/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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for power management, sensing, and interface applications.
The DS1816-5/T&R belongs to the EconoReset™ family-engineered for cost-sensitive, high-volume embedded systems needing reliable, low-component-count power supervision without sacrificing accuracy or temperature stability.
FAQ
What is the exact VCC trip point range for DS1816-5/T&R?
The DS1816-5/T&R has a factory-trimmed VCC trip point of 2.98V to 3.15V (±5% around 3.0V nominal), specified over -40°C to +85°C. This range ensures consistent detection of 3.3V supply droop across temperature and process variation. DS1816-5/T&R maintains this tolerance without external calibration or trimming components.
Does DS1816-5/T&R require an external pull-up resistor on the RST pin?
No-DS1816-5/T&R integrates a 3.5kΩ to 7.5kΩ pull-up resistor internally, enabling direct connection to most 3.3V microcontrollers. An external pull-up is only needed if the target load exceeds the internal resistor's drive capability or if a different logic threshold is required. DS1816-5/T&R's design eliminates this component in typical applications.
Can DS1816-5/T&R be used with 5V systems?
Yes-DS1816-5/T&R operates with VCC from 1.2V to 5.5V, but its trip point remains fixed at ~3.0V ±5%. In 5V systems, it monitors for brownout relative to 3.0V, not 5V. This makes DS1816-5/T&R suitable for detecting partial rail collapse or pre-failure conditions in higher-voltage domains where 3.3V logic supplies are derived.
What is the reset timeout duration of DS1816-5/T&R after VCC recovery?
DS1816-5/T&R holds the RST pin low for 100ms to 250ms after VCC returns to within tolerance, with a typical value of 150ms. This guaranteed minimum duration ensures microprocessors and associated peripherals fully stabilize before release. DS1816-5/T&R's timeout is internally generated and independent of external capacitors or resistors.
Is DS1816-5/T&R available in both TO-92 and SOT-23 packages?
Yes-DS1816-5/T&R is offered in both TO-92 (through-hole) and SOT-23 (surface-mount) packages, sharing identical pinout and electrical specifications. The "/T&R" suffix indicates tape-and-reel packaging, commonly used for SOT-23, but TO-92 variants are also supported per Maxim's original product definition. DS1816-5/T&R provides layout flexibility across prototyping and high-volume production.
DS1816-5/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:
- 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/T&R FAQ
1.How can I place an order for DS1816-5/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1816-5/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 DS1816-5/T&R reliable?
The price and inventory of DS1816-5/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 DS1816-5/T&R is usually 5 days.
3.What payment methods are accepted for DS1816-5/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1816-5/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1816-5/T&R?
DS1816-5/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1816-5/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 DS1816-5/T&R?
For technical support, including DS1816-5/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1816-5/T&R requirements.
6.How does Aetrix verify that DS1816-5/T&R is sourced from the original manufacturer or authorized distributors?
All DS1816-5/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 DS1816-5/T&R meets industry standards.
7.What is the process for return or replacement of DS1816-5/T&R?
All DS1816-5/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1816-5/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 DS1816-5/T&R part is unused and in its original packaging.
Return procedure for DS1816-5/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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