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Analog Devices Inc./Maxim Integrated DS1836B-10+
- Part No.:
- DS1836B-10+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DS1836B-10+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,167
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Product details
Overview
DS1836B-10+ from Maxim Integrated is a 5V microprocessor supervisory circuit with power-switching and non-maskable interrupt (NMI) functions. It monitors VCC for out-of-tolerance conditions, asserts RST for 350ms after recovery, switches VOUT between VCC and VBAT at 3.8V/3.9V thresholds, and triggers NMI when IN drops below 1.25V - used in PIC-based embedded systems requiring dual-supply failover and early power-fail warning.
For engineers reviewing the DS1836B-10+ datasheet, DS1836B-10+ pinout, DS1836B-10+ application, or DS1836B-10+ equivalent, key selection criteria include its 4.25V–4.50V VCC reset trip point, 350ms reset timeout, push-pull RST output, battery switchover behavior, and NMI sensing capability at the IN pin.
Technical Context
The DS1836B-10+ integrates three core functions: precision voltage monitoring with temperature-compensated bandgap reference, automatic dual-supply power switching (VCC ↔ VBAT), and high-impedance sense-input-triggered NMI generation. Its reset logic uses hysteresis to avoid chatter during brownout, and the RST output remains active for 350ms after VCC returns to tolerance.
It operates across -40°C to +85°C, supports 1.2V–5.5V supply range, maintains valid outputs down to 1.2V on inputs (with optional pull-down for RST), and features CMOS-compatible push-pull RST and open-drain NMI outputs requiring external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Trip Point | 4.25V (min) to 4.50V (max); defines precise 5V system brownout detection threshold |
| Reset Timeout | 350ms (typical); ensures stable MCU initialization after power recovery |
| VCC-to-VBAT Switch Threshold | 3.80V–3.90V (falling); enables seamless backup power takeover before main supply collapse |
| IN Sense Trip Voltage | 1.15V–1.35V (typ 1.25V); allows user-configurable early-warning voltage monitoring via resistor divider |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded environments |
| Supply Current | 30–50μA (at 3.6V); ultra-low quiescent draw for battery-backed operation |
| RST Output Type | CMOS push-pull; eliminates need for external pull-up and supports direct MCU reset input |
Pinout & Package
DS1836B-10+ is available in 8-pin SO (150mil) and 8-pin DIP (300mil) packages. Both share identical pin mapping and function assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Primary 5V supply rail; monitored for reset assertion and used as VOUT source above 3.9V |
| VBAT | Battery backup supply input | Secondary supply; powers VOUT when VCC falls below 3.8V |
| NC | No-connect terminal | Unbonded pin; must be left floating or tied to GND per layout guidelines |
| VOUT | Switched power output | Delivers power from VCC or VBAT depending on real-time supply status |
| GND | Ground reference | Common return path for all analog and digital circuitry |
| IN | High-impedance sense input | Monitors external voltage divider; triggers NMI when voltage drops below 1.25V |
| NMI | Non-maskable interrupt output | Open-drain signal requiring external 10kΩ pull-up; alerts CPU of imminent power loss |
| RST | Reset output | Push-pull CMOS output; drives MCU reset line low for 350ms after VCC recovery |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply power switching | Automatically selects VCC or VBAT for VOUT based on real-time voltage thresholds (3.8V/3.9V), eliminating manual switchover circuitry |
| Temperature-compensated voltage reference | Stable 1.25V internal reference enables accurate, drift-free IN pin sensing across full -40°C to +85°C range |
| Programmable reset timeout | Fixed 350ms reset hold time ensures reliable microcontroller boot sequencing without external timing components |
| Early-warning NMI generation | Independent sense path triggers NMI before RST activation, providing critical time for controlled shutdown or data save |
| Low-power operation | 30–50μA typical supply current extends battery life in always-on backup configurations |
Applications
| PIC Microcontroller Supervision | Industrial Battery-Backed Controller |
|---|---|
Use Scenario: Monitoring 5V supply feeding a PIC16F or PIC18F microcontroller in a programmable logic controller (PLC) module. IC Role / Device Role / Timing Role: DS1836B-10+ acts as system-level power supervisor and reset generator, asserting RST during brownouts and enabling graceful firmware recovery. Use Value: Prevents MCU lockup by guaranteeing 350ms reset pulse after VCC stabilization, matching PIC's minimum reset duration requirement. | Use Scenario: Maintaining RTC and SRAM state during AC mains failure in a building automation panel. IC Role / Device Role / Timing Role: DS1836B-10+ serves as intelligent power switch and early-warning detector, routing VOUT from VCC to VBAT and signaling NMI at 1.25V sense threshold. Use Value: Provides >10ms NMI warning before RST activation, allowing firmware to save volatile data before backup power takes over. |
| Medical Diagnostic Equipment | Point-of-Sale Terminal |
Use Scenario: Ensuring safe shutdown and configuration retention in portable ultrasound device powered by Li-ion battery and 5V adapter. IC Role / Device Role / Timing Role: DS1836B-10+ monitors main 5V rail and battery voltage, manages VOUT sourcing, and triggers NMI to initiate EEPROM write before power collapse. Use Value: Dual-threshold switching (3.8V/3.9V) prevents supply oscillation during marginal input conditions, improving system reliability. | Use Scenario: Securing transaction integrity in retail POS terminals with flash memory and real-time clock. IC Role / Device Role / Timing Role: DS1836B-10+ supervises 5V DC input, activates RST on undervoltage, and uses IN pin to monitor upstream DC-DC converter output for predictive failure detection. Use Value: Push-pull RST output directly drives reset input of ARM Cortex-M0 host MCU without level-shifting or pull-up resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T47D+ | Fixed 4.63V reset threshold; no power-switching or NMI functionality; SOT23-5 package | Suitable only for basic reset generation - lacks VOUT switching and IN-sense capability | Select if only reset supervision is needed and board space is constrained |
| TPS3808G33DBVR | 3.3V fixed reset threshold; no battery switchover; open-drain RST; no NMI output | Designed for 3.3V-only systems; requires external circuitry for dual-supply management | Choose for cost-sensitive 3.3V designs where battery backup is handled separately |
Compared with MAX6326–T47D+ and TPS3808G33DBVR, DS1836B-10+ uniquely combines 5V reset supervision, automatic VCC/VBAT switchover, and dedicated NMI generation in a single 8-pin package - making it irreplaceable for applications requiring coordinated power failover and early-warning response.
Availability
DS1836B-10+ is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and guaranteed dual-supply failover capability.
Supply support for DS1836B-10+ 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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The DS1836B-10+ belongs to the MicroManager™ family of supervisory circuits, designed specifically for robust power monitoring, reset generation, and battery-switchover control in microprocessor-based systems operating from dual supplies.
FAQ
What is the exact VCC reset trip point for DS1836B-10+?
The DS1836B-10+ has a guaranteed VCC reset trip point of 4.25V (minimum) to 4.50V (maximum), with typical value 4.37V. This specification applies specifically to the "-10" variant and is validated across -40°C to +85°C. The DS1836B-10+ uses this threshold to detect 5V supply brownout and assert RST accordingly.
Does DS1836B-10+ support true 3.3V operation?
No - DS1836B-10+ is a 5V-specific variant. Its reset threshold (4.25V–4.50V) and power-switching thresholds (3.8V/3.9V) are optimized for 5V systems. For 3.3V operation, DS1836C-10+ or DS1836D-10+ variants are specified with 2.80V–2.97V trip points. DS1836B-10+ will not function correctly as a 3.3V supervisor.
How does the NMI function work on DS1836B-10+?
The NMI output on DS1836B-10+ is triggered when the voltage at the IN pin falls below 1.25V (1.15V–1.35V range). It uses an internal bandgap reference and high-impedance comparator, allowing flexible sensing via external resistor dividers. The DS1836B-10+ generates NMI asynchronously and independently of RST, providing early warning before reset activation.
Can DS1836B-10+ maintain RST output validity when VCC drops to 0V?
Yes - DS1836B-10+ supports RST validity down to 0V VCC when a 100kΩ pull-down resistor is connected from RST to GND (per Figure 5 in datasheet). This feature ensures the reset line remains asserted even during complete main supply loss, enabling reliable fallback to battery power. DS1836B-10+ implements this using its push-pull RST structure.
What package options are available for DS1836B-10+?
DS1836B-10+ is offered in two industry-standard packages: 8-pin SOIC (150mil width) and 8-pin PDIP (300mil width). Both packages share identical pinout and electrical characteristics. The "+" suffix indicates lead-free, RoHS-compliant packaging with NiPdAu lead finish, and both variants are fully interchangeable at the board level.
DS1836B-10+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroManager
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.37V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DS1836B-10+ FAQ
1.How can I place an order for DS1836B-10+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836B-10+ 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 DS1836B-10+ reliable?
The price and inventory of DS1836B-10+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1836B-10+ is usually 5 days.
3.What payment methods are accepted for DS1836B-10+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836B-10+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836B-10+?
DS1836B-10+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836B-10+ 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 DS1836B-10+?
For technical support, including DS1836B-10+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836B-10+ requirements.
6.How does Aetrix verify that DS1836B-10+ is sourced from the original manufacturer or authorized distributors?
All DS1836B-10+ 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 DS1836B-10+ meets industry standards.
7.What is the process for return or replacement of DS1836B-10+?
All DS1836B-10+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1836B-10+, 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 DS1836B-10+ part is unused and in its original packaging.
Return procedure for DS1836B-10+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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