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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated DS1814BR-10+T&R

Name: DS1814BR-10+T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1814BR-10+T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1814BR-10+T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: DS1814BR-10+T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

DS1814BR-10+T&R from Maxim Integrated is a 5V microprocessor supervisory circuit with watchdog timer, pushbutton reset control, and precise 10% V_CC trip point (4.25–4.50 V). It delivers active-low reset output, 140 ms minimum reset pulse width, and operates across –40°C to +85°C in SOT-23-5. Used in embedded controllers to prevent runaway code during power transients.

For engineers reviewing the DS1814BR-10+T&R datasheet, DS1814BR-10+T&R pinout, DS1814BR-10+T&R application, or DS1814BR-10+T&R equivalent, key selection criteria include reset timing accuracy, watchdog timeout (1.12 s), pushbutton debounce capability, V_CC monitoring tolerance, and compatibility with 5V microprocessor systems requiring reliable power-up/power-down sequencing.

Technical Context

The DS1814BR-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 internal pushbutton debouncing with 140 ms reset assertion. Its RST output uses a push-pull driver valid down to 1.0 V V_CC, supporting brown-out detection in low-voltage ramp scenarios.

It belongs to the DS1814 'B' variant family-featuring active-low RST (Pin 1), GND (Pin 2), active-high RST (Pin 3), ST input (Pin 4), and V_CC (Pin 5). The 'B' version supports watchdog functionality but excludes PBRST, distinguishing it from 'A' and 'C' variants.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25–4.50 V (10% tolerance; ensures reset activation before 5V system instability)
Reset Pulse Width	140–280 ms (guarantees full microprocessor stabilization after power recovery)
Watchdog Timeout	1.12–2.40 s (forces reset if ST input stalls, preventing firmware lockup)
Operating Temp	–40°C to +85°C (supports industrial-grade embedded deployment)
Supply Current	10–15 µA (ultra-low quiescent draw for battery-backed or energy-sensitive designs)
Output Drive	350 µA high / 3.2–6 mA low (sufficient to directly drive most MCU reset inputs without external buffering)
V_CC Range	1.0–5.5 V (enables operation during brown-out and graceful shutdown down to 1.0 V)

Pinout & Package

SOT-23-5 surface-mount package: 2.9 mm × 1.6 mm × 1.1 mm body, gull-wing leads, JEDEC MO-178 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 - RST	Active-Low Reset Output	Drives MCU /RESET pin low during power failure, watchdog timeout, or reset initiation
2 - GND	Ground Reference	Common return path for all internal comparators, timers, and output drivers
3 - RST	Active-High Reset Output	Provides complementary reset signal for logic families requiring active-high assertion
4 - ST	Watchdog Strobe Input	Must toggle every ≤1.12 s to prevent watchdog timeout; floating disables function
5 - V_CC	Power Supply Input	Supplies internal reference, comparator, and output stages; monitors own supply for trip condition

Key Features

Feature	Design Value
10% V_CC Trip Accuracy	Guarantees reset activation at 4.25–4.50 V, matching 5V system marginality requirements without external calibration
140 ms Minimum Reset Hold Time	Ensures microprocessor completes power-on initialization and clock stabilization before release
1.12 s Watchdog Timeout	Aligns with typical firmware task cycle times, enabling detection of stalled execution without false triggers
Push-Pull RST Outputs	Eliminates need for external pull-up resistors and supports valid reset signaling down to 1.0 V V_CC
SOT-23-5 Footprint	Enables space-constrained PCB layouts while maintaining thermal performance up to +85°C ambient

Applications

Industrial PLC Controller	Smart Metering Unit
Use Scenario: Power grid fluctuations cause intermittent brown-outs in field-deployed meters. IC Role / Device Role / Timing Role: DS1814BR-10+T&R monitors 5V rail and asserts RST within 40 µs of V_CC drop below 4.25 V, holding reset for ≥140 ms post-recovery. Use Value: Prevents corrupted flash writes and state machine corruption during unstable AC/DC conversion cycles.	Use Scenario: Firmware hangs due to EMI-induced register corruption in metrology subsystem. IC Role / Device Role / Timing Role: DS1814BR-10+T&R's ST input receives periodic GPIO toggles from metrology core; missing toggle >1.12 s triggers RST. Use Value: Guarantees automatic recovery without manual intervention or external watchdog IC.
Point-of-Sale Terminal	Medical Infusion Pump Controller
Use Scenario: Operator-initiated hard reset via front-panel button during software update failure. IC Role / Device Role / Timing Role: DS1814BR-10+T&R not used for PBRST ('B' variant), so external RC reset circuit required; ST remains unused or tied high. Use Value: Enables clean, debounced reset generation using discrete components while retaining V_CC supervision and watchdog capability.	Use Scenario: Battery backup switchover causes brief 5V rail dip during AC loss. IC Role / Device Role / Timing Role: DS1814BR-10+T&R detects V_CC sag to 4.3 V and holds RST active until rail recovers and stabilizes for 140 ms. Use Value: Meets IEC 60601-1 requirement for deterministic reset behavior during power transition events.

Industrial PLC Controller

Smart Metering Unit

Use Scenario: Power grid fluctuations cause intermittent brown-outs in field-deployed meters.

IC Role / Device Role / Timing Role: DS1814BR-10+T&R monitors 5V rail and asserts RST within 40 µs of V_CC drop below 4.25 V, holding reset for ≥140 ms post-recovery.

Use Value: Prevents corrupted flash writes and state machine corruption during unstable AC/DC conversion cycles.

Use Scenario: Firmware hangs due to EMI-induced register corruption in metrology subsystem.

IC Role / Device Role / Timing Role: DS1814BR-10+T&R's ST input receives periodic GPIO toggles from metrology core; missing toggle >1.12 s triggers RST.

Use Value: Guarantees automatic recovery without manual intervention or external watchdog IC.

Point-of-Sale Terminal

Medical Infusion Pump Controller

Use Scenario: Operator-initiated hard reset via front-panel button during software update failure.

IC Role / Device Role / Timing Role: DS1814BR-10+T&R not used for PBRST ('B' variant), so external RC reset circuit required; ST remains unused or tied high.

Use Value: Enables clean, debounced reset generation using discrete components while retaining V_CC supervision and watchdog capability.

Use Scenario: Battery backup switchover causes brief 5V rail dip during AC loss.

IC Role / Device Role / Timing Role: DS1814BR-10+T&R detects V_CC sag to 4.3 V and holds RST active until rail recovers and stabilizes for 140 ms.

Use Value: Meets IEC 60601-1 requirement for deterministic reset behavior during power transition events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX823SESA+	Pin- and function-compatible 5V supervisor; 5% trip tolerance (4.50–4.75 V); no watchdog timeout spec provided in public datasheet	Lacks documented watchdog timer; suitable only where software reset supervision is handled externally	Select when tighter V_CC threshold (±2.5%) is prioritized over watchdog assurance
TPS3808G12DBVR	Adjustable reset threshold (via external resistor divider); fixed 200 ms reset delay; no pushbutton or watchdog inputs	Requires external circuitry for pushbutton or watchdog functions; higher quiescent current (1.1 µA vs. 12 µA)	Select when flexible trip-point tuning is needed and ST/PBRST functionality is implemented separately

Compared with MAX823SESA+ and TPS3808G12DBVR, the DS1814BR-10+T&R uniquely integrates 10% V_CC monitoring, 1.12 s watchdog, and dual RST outputs in one SOT-23-5 device-reducing BOM count and PCB area where both power and software fault detection are required.

Availability

DS1814BR-10+T&R is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for DS1814BR-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, automotive, and communications systems.

The DS1814BR-10+T&R belongs to Maxim's MicroMonitor™ supervisory product line, engineered specifically for robust microprocessor reset and watchdog control in 5V embedded systems subject to power transients and software faults.

FAQ

What is the exact V_CC trip point range for DS1814BR-10+T&R?

The DS1814BR-10+T&R has a guaranteed V_CC trip point range of 4.25 V to 4.50 V, corresponding to its 10% tolerance specification for 5V systems. This window ensures reset activation before critical microprocessor operation becomes unreliable, and the 10 mV hysteresis prevents chatter near the threshold. The DS1814BR-10+T&R maintains this specification across –40°C to +85°C.

Does DS1814BR-10+T&R support pushbutton reset functionality?

No, DS1814BR-10+T&R does not support pushbutton reset. It is the 'B' variant, which includes ST (watchdog strobe) and dual RST outputs but omits the PBRST pin. Pushbutton reset is only available on DS1814A and DS1814C variants. For DS1814BR-10+T&R, external hardware must be used if manual reset is required.

How is the watchdog timer disabled on DS1814BR-10+T&R?

The watchdog timer on DS1814BR-10+T&R is disabled by leaving the ST pin unconnected (floating) or tri-stated. When ST is open, no transitions occur to reset the internal 1.12 s timer, but the datasheet confirms the watchdog remains inactive in this state. No additional configuration or pull-up/down is required-DS1814BR-10+T&R defaults to watchdog-disabled operation unless ST is actively driven.

Can DS1814BR-10+T&R operate below 5V, and down to what V_CC level does RST remain valid?

Yes, DS1814BR-10+T&R operates from 1.0 V to 5.5 V. Its RST output remains valid down to 1.0 V V_CC using the internal push-pull driver. Below 1.0 V, a 100 kΩ pull-down resistor from RST to GND extends validity to 0 V V_CC, enabling full brown-out detection through complete power collapse-critical for safe shutdown in DS1814BR-10+T&R-based systems.

Is DS1814BR-10+T&R pin-compatible with MAX823 series devices?

Yes, DS1814BR-10+T&R is explicitly stated as pin- and function-compatible with MAX823/24/25 products in its official documentation. Pin 1 (RST), Pin 2 (GND), Pin 3 (RST), Pin 4 (ST), and Pin 5 (V_CC) match the MAX823SESA+ pinout and electrical behavior-including reset timing, trip point, and watchdog response-enabling direct substitution in existing 5V supervisory circuits.

DS1814BR-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:: Active

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

DS1814BR-10+T&R FAQ

1.How can I place an order for DS1814BR-10+T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1814BR-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 DS1814BR-10+T&R reliable?

The price and inventory of DS1814BR-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 DS1814BR-10+T&R is usually 5 days.

3.What payment methods are accepted for DS1814BR-10+T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1814BR-10+T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1814BR-10+T&R?

DS1814BR-10+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1814BR-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 DS1814BR-10+T&R?

For technical support, including DS1814BR-10+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1814BR-10+T&R requirements.

6.How does Aetrix verify that DS1814BR-10+T&R is sourced from the original manufacturer or authorized distributors?

All DS1814BR-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 DS1814BR-10+T&R meets industry standards.

7.What is the process for return or replacement of DS1814BR-10+T&R?

All DS1814BR-10+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1814BR-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 DS1814BR-10+T&R part is unused and in its original packaging.

Return procedure for DS1814BR-10+T&R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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