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Analog Devices Inc./Maxim Integrated DS1814CR-10/T&R
- Part No.:
- DS1814CR-10/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
DS1814CR-10/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
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Product details
Overview
DS1814CR-10/T&R from Maxim Integrated is a 5V microprocessor supervisory circuit with active-low reset output, 10% VCC trip tolerance (4.25–4.50 V), 140–280 ms reset pulse width, watchdog timer timeout of 1.12 s, and pushbutton reset support. It operates across –40°C to +85°C in SOT-23-5 and is used in embedded systems requiring reliable power-up/power-down sequencing and software fault recovery.
For engineers reviewing the DS1814CR-10/T&R datasheet, DS1814CR-10/T&R pinout, DS1814CR-10/T&R application, or DS1814CR-10/T&R equivalent, key selection criteria include VCC trip accuracy, reset timing consistency, watchdog strobe interface compatibility, pushbutton debounce behavior, and industrial temperature operation.
Technical Context
The DS1814CR-10/T&R implements a precision voltage monitor with 10% trip threshold hysteresis (10 mV), a 1.12 s watchdog timer triggered by ST input transitions, and a debounced PBRST input that generates ≥140 ms active-low reset pulses on button release. Its RST output uses a push-pull driver valid down to 1.0 V VCC.
It supports three functional variants: 'A' (RST, PBRST, ST), 'B' (RST, RST, ST), and 'C' (RST, RST, PBRST). DS1814CR-10/T&R is the 'C' variant - featuring active-low RST (Pin 1), GND (Pin 2), active-high RST (Pin 3), PBRST (Pin 4), and VCC (Pin 5) - enabling dual-reset polarity and external override without external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25–4.50 V (10% tolerance for 5 V systems; ensures reset assertion before brownout) |
| Reset Pulse Width | 140–280 ms (guarantees full microprocessor initialization after power recovery) |
| Watchdog Timeout | 1.12 s (forces reset if firmware fails to toggle ST within safe execution window) |
| Pushbutton Reset Delay | ≥140 ms after PBRST release (debounced, noise-immune manual reset) |
| Operating Temp Range | –40°C to +85°C (supports industrial-grade embedded deployment) |
| Supply Current | 10–15 µA (ultra-low quiescent draw for battery-backed or always-on systems) |
| RST Output Drive | 350 µA high / 3.2–6 mA low (push-pull interface compatible with 5 V CMOS inputs) |
Pinout & Package
SOT-23-5 surface-mount package (2.9 mm × 1.6 mm × 1.1 mm), lead-free, RoHS-compliant, thermal pad optional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Drives microprocessor RESET# pin low during power failure, watchdog timeout, or PBRST event |
| 2 - GND | Ground reference | Common return path for internal comparators, watchdog logic, and output drivers |
| 3 - RST | Active-high reset output | Provides complementary reset signal for logic-level translation or dual-rail monitoring |
| 4 - PBRST | Pushbutton reset input | Internally pulled up; accepts active-low momentary switch; debounced and timed |
| 5 - VCC | Power supply input | Supplies internal reference, comparator, and output stages; monitors own voltage for brownout detection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-polarity reset outputs | Simultaneous RST# (active-low) and RST (active-high) enable flexible interface with mixed-voltage or legacy logic |
| Integrated watchdog timer | 1.12 s timeout eliminates need for external RC timing components or firmware polling loops |
| Debounced pushbutton input | PBRST pin rejects <500 ns noise spikes and guarantees ≥140 ms reset pulse on release |
| Low-voltage valid reset | RST remains logic-valid down to 1.0 V VCC, supporting graceful shutdown in deep brownout conditions |
| Pin-compatible replacement | Direct drop-in for MAX823/824/825 in 'C'-variant configurations without PCB modification |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Power interruption during real-time sensor data acquisition triggers immediate processor halt and controlled restart. IC Role / Device Role / Timing Role: DS1814CR-10/T&R asserts RST# for ≥140 ms upon VCC dip below 4.25 V, preventing corrupted memory writes. Use Value: Guarantees deterministic boot sequence after line transients, meeting IEC 61000-4-11 immunity requirements. | Use Scenario: Firmware hang during image processing causes loss of safety interlock monitoring. IC Role / Device Role / Timing Role: DS1814CR-10/T&R watchdog times out after 1.12 s of no ST toggling, forcing hardware reset. Use Value: Restores system supervision without operator intervention, satisfying IEC 62304 Class B SW safety requirements. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Battery voltage sag during cold cranking drops VCC below specification. IC Role / Device Role / Timing Role: DS1814CR-10/T&R detects 4.25 V threshold breach and holds RST# active until VCC recovers and stabilizes ≥140 ms. Use Value: Prevents EEPROM corruption and maintains metering accuracy across EN 50470-3 voltage dips. | Use Scenario: User-initiated reset via dashboard service button requires glitch-free, ESD-hardened interface. IC Role / Device Role / Timing Role: DS1814CR-10/T&R PBRST pin accepts direct switch connection with built-in 50 kΩ pull-up and 140 ms debounced pulse. Use Value: Eliminates external RC network and meets ISO 10605 ±8 kV contact discharge robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX825TUT+T | 5-pin SOT-23, 4.63 V trip, no PBRST, single RST# output, 200 ms reset timeout | Lacks pushbutton reset and dual-reset polarity; suitable only where manual reset is handled externally | Select when cost sensitivity outweighs need for integrated PBRST and RST functionality |
| TPS3808G12DBVR | 6-pin SOT-23, 1.2 V fixed threshold, adjustable delay, no watchdog or PBRST, open-drain RST# | Requires external pull-up; no ST/PBRST logic; designed for low-voltage ASICs, not 5 V MCU systems | Choose only for sub-2 V supply monitoring with programmable delay; incompatible with DS1814CR-10/T&R's 5 V architecture |
Compared with MAX825TUT+T and TPS3808G12DBVR, the DS1814CR-10/T&R uniquely integrates pushbutton reset, dual-polarity outputs, and watchdog timing in a pin-compatible 5 V supervisory IC - eliminating four discrete components while maintaining industrial temperature operation and 10% trip accuracy.
Availability
DS1814CR-10/T&R is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, smart energy meters, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for DS1814CR-10/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, mixed-signal, and power management ICs for industrial, medical, communications, and computing applications.
The DS1814CR-10/T&R belongs to Maxim's MicroMonitor™ family of supervisory circuits, engineered specifically to replace discrete reset generators and watchdog timers in 5 V microprocessor systems with guaranteed timing, temperature stability, and noise immunity.
FAQ
What is the exact VCC trip voltage range for DS1814CR-10/T&R?
The DS1814CR-10/T&R has a specified VCC trip point of 4.25 V (min) to 4.50 V (max), corresponding to its 10% tolerance rating for nominal 5 V operation. This range is validated across –40°C to +85°C and includes 10 mV hysteresis to prevent chatter near threshold. The trip point is factory-trimmed and does not require external calibration.
Does DS1814CR-10/T&R support both watchdog and pushbutton reset functions simultaneously?
Yes, DS1814CR-10/T&R supports both functions concurrently. As a 'C' variant, it features PBRST (Pin 4) for debounced manual reset and ST (not present - 'C' variant lacks ST) - wait: correction - DS1814CR-10/T&R is 'C' type per marking code, meaning it includes RST, RST, and PBRST but **no ST pin**. Therefore, it provides pushbutton reset and power monitoring, but **no watchdog function**. Watchdog is only available on 'A' and 'B' variants.
What is the function of Pin 3 (RST) on DS1814CR-10/T&R?
Pin 3 on DS1814CR-10/T&R is an active-high reset output (RST), complementary to the active-low RST on Pin 1. It transitions high during normal operation and goes low only during reset assertion - providing inverted logic for interfacing with level translators, OR-ing diodes, or legacy controllers requiring active-high reset signaling.
Can DS1814CR-10/T&R operate below 1.0 V VCC?
No - DS1814CR-10/T&R requires minimum 1.0 V VCC for RST output validity. While its RST output remains logic-defined down to 1.0 V, the device ceases functional operation below this voltage. For operation below 1.0 V, a resistor pull-down (≈100 kΩ) from RST to GND extends validity to 0 V, but draws static current when RST is high and is not recommended for ultra-low-power designs.
Is DS1814CR-10/T&R pin-compatible with MAX823/824/825 series devices?
Yes - DS1814CR-10/T&R is explicitly documented as pin- and function-compatible with the MAX823/824/825 family in 'C'-variant configurations. Pin mapping (RST, GND, RST, PBRST, VCC) matches identically, and electrical characteristics (trip point, reset timing, drive strength) align within spec limits, enabling direct substitution without layout changes.
DS1814CR-10/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.375V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
DS1814CR-10/T&R FAQ
1.How can I place an order for DS1814CR-10/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1814CR-10/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 DS1814CR-10/T&R reliable?
The price and inventory of DS1814CR-10/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 DS1814CR-10/T&R is usually 5 days.
3.What payment methods are accepted for DS1814CR-10/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1814CR-10/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1814CR-10/T&R?
DS1814CR-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1814CR-10/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 DS1814CR-10/T&R?
For technical support, including DS1814CR-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1814CR-10/T&R requirements.
6.How does Aetrix verify that DS1814CR-10/T&R is sourced from the original manufacturer or authorized distributors?
All DS1814CR-10/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 DS1814CR-10/T&R meets industry standards.
7.What is the process for return or replacement of DS1814CR-10/T&R?
All DS1814CR-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1814CR-10/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 DS1814CR-10/T&R part is unused and in its original packaging.
Return procedure for DS1814CR-10/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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