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Analog Devices Inc./Maxim Integrated DS1836BS-5+
- Part No.:
- DS1836BS-5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1836BS-5+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
DS1836BS-5+ from Maxim Integrated is a 5V microprocessor supervisory circuit combining power-on reset, battery backup switching, and non-maskable interrupt generation. It monitors VCC for out-of-tolerance conditions (trip point 4.50–4.75V), asserts active-low RST for 350ms after recovery, switches VOUT between VCC and VBAT at 3.8V/3.9V thresholds, and triggers NMI when IN falls below 1.25V - used in PIC-based embedded systems with dual-supply resilience requirements.
For engineers reviewing the DS1836BS-5+ datasheet, DS1836BS-5+ pinout, DS1836BS-5+ application, or DS1836BS-5+ equivalent, key selection criteria include its 350ms reset timeout, 4.63V typical VCC trip point, push-pull RST output, 8-pin SO package, and integrated NMI sense input for early power-fail warning.
Technical Context
The DS1836BS-5+ implements a precision bandgap-referenced comparator to detect VCC deviations, generating a power-fail signal that forces RST active and initiates VOUT switchover to VBAT when VCC drops below 3.8V. Its internal voltage sensor maintains reset assertion for 350ms after VCC returns to tolerance.
It features a high-impedance IN pin referenced to a 1.25V internal threshold, enabling user-configurable early-warning NMI via external resistor divider. The RST output uses a CMOS push-pull structure capable of valid logic levels down to 0V VCC, while NMI is open-drain requiring external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.50–4.75V (ensures reliable reset activation during 5V supply brownout) |
| Reset Timeout | 200–500ms (guarantees stable MCU initialization after power recovery) |
| VCC-to-VBAT Switch Threshold | 3.80–3.90V (defines precise switchover point for seamless battery backup) |
| IN Trip Voltage | 1.15–1.35V (supports configurable early-warning NMI with ±0.1V tolerance) |
| Operating Temp Range | −40°C to +85°C (enables deployment in industrial-grade embedded environments) |
| Supply Current | 35–55μA at 5.5V (minimizes quiescent power draw in always-on monitoring) |
| Output Type | CMOS push-pull RST, open-drain NMI (provides direct MCU interface without external buffers) |
Pinout & Package
DS1836BS-5+ is housed in an 8-pin SOIC (150-mil) surface-mount package with standard pin spacing and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 5V primary supply rail monitored for reset and switchover |
| VBAT | Battery backup supply input | Secondary supply source activated when VCC falls below 3.8V |
| NC | No-connect terminal | Unbonded pin; must remain unconnected per design |
| VOUT | Switched power output | Delivers power from VCC or VBAT depending on switchover state |
| GND | Ground reference | Common return path for all analog and digital circuitry |
| IN | Non-maskable interrupt sense input | High-impedance comparator input referenced to 1.25V internal threshold |
| NMI | Open-drain NMI output | Active-low interrupt signal requiring external 10kΩ pull-up |
| RST | Push-pull reset output | Active-low CMOS reset signal compatible with PIC and other 5V MCUs |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply switchover | Automatically routes VOUT from VCC to VBAT at 3.8V drop, eliminating need for external diode-OR or load switches |
| Programmable NMI sensing | IN pin accepts user-defined voltage divider to trigger early warning before main supply collapse |
| 0V-valid RST output | Push-pull RST remains functional even when VCC reaches 0V, enabling last-cycle system shutdown |
| Temperature-compensated reference | Internal bandgap reference ensures stable 1.25V IN threshold and 4.63V VCC trip across −40°C to +85°C |
| Low-power supervision | Typical 45μA operating current allows continuous monitoring in battery-backed systems |
Applications
| Industrial PLC Controller | PIC-Based Data Logger |
|---|---|
Use Scenario: Maintains real-time clock and SRAM integrity during AC mains interruption. IC Role / Device Role / Timing Role: Supervisory controller providing battery switchover, reset hold, and early NMI warning. Use Value: Enables 200+ ms of deterministic shutdown time before VCC collapse, preserving unsaved sensor data. | Use Scenario: Powers PIC16F877A and EEPROM during brief 5V supply dips in remote telemetry units. IC Role / Device Role / Timing Role: Dual-role supervisor: reset generator and VCC/VBAT selector. Use Value: Eliminates discrete Schottky diodes and RC reset networks, reducing BOM count by 4 components. |
| Medical Infusion Pump | Point-of-Sale Terminal |
Use Scenario: Ensures safe motor stop and alarm activation when 5V DC adapter fails. IC Role / Device Role / Timing Role: Safety-critical power monitor triggering NMI for immediate fault response and RST for controlled reboot. Use Value: 1.25V IN threshold allows direct monitoring of 12V pump supply via resistor divider, extending warning window by 120ms vs. VCC-only detection. | Use Scenario: Preserves transaction log in flash memory during unexpected 5V power loss in retail kiosks. IC Role / Device Role / Timing Role: System-level power supervisor coordinating reset timing and backup power routing. Use Value: 350ms guaranteed RST pulse ensures full EEPROM write completion before power cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX692AESA+ | Single 5V reset IC with 4.65V trip; no battery switchover or NMI function | Lacks VOUT switching and IN-sense capability; suitable only for basic reset-only designs | Select when battery backup and early-warning interrupt are unnecessary |
| TPS3823-50DBVR | 5V supervisor with 4.63V threshold and 200ms reset timeout; no switchover or NMI | Offers tighter trip accuracy (±0.5%) but omits dual-supply management entirely | Choose for cost-sensitive applications where only reset timing and accuracy matter |
Compared with DS1836BS-5+, MAX692AESA+ and TPS3823-50DBVR provide simpler reset functionality with higher trip accuracy but omit critical dual-supply switching and NMI warning - making DS1836BS-5+ uniquely suited for systems requiring coordinated power fail response and battery-backed operation.
Availability
DS1836BS-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, PIC-based data loggers, medical infusion pumps, and point-of-sale terminals requiring stable component supply and long-term lifecycle support.
Supply support for DS1836BS-5+ 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 computing applications.
The DS1836BS-5+ belongs to Maxim's MicroManager family of supervisory circuits, engineered specifically for robust power monitoring and fail-safe operation in microprocessor-based systems with dual-supply requirements.
FAQ
What is the exact VCC reset threshold for DS1836BS-5+?
The DS1836BS-5+ has a specified VCC trip point of 4.50V (minimum), 4.63V (typical), and 4.75V (maximum) - calibrated for 5V systems. This threshold ensures reset activation during brownout conditions while avoiding false triggers from normal ripple. The DS1836BS-5+ uses an internal temperature-compensated bandgap reference to maintain stability across −40°C to +85°C.
Does DS1836BS-5+ support battery backup switchover, and at what voltage?
Yes, DS1836BS-5+ supports automatic switchover from VCC to VBAT when VCC drops below 3.80–3.90V, and reverts to VCC when VCC rises above 3.90–4.00V. This hysteresis prevents oscillation during marginal supply conditions. The DS1836BS-5+ delivers switched power on VOUT, eliminating need for external diode-OR circuits in dual-supply designs.
How does the NMI function work on DS1836BS-5+?
The DS1836BS-5+ generates a non-maskable interrupt when the voltage at the IN pin falls below 1.25V (1.15–1.35V range). This high-impedance input accepts a user-defined resistor divider to monitor auxiliary supplies - enabling earlier warning than VCC monitoring alone. The DS1836BS-5+ NMI output is open-drain and requires a 10kΩ pull-up resistor for proper logic-level signaling.
Is DS1836BS-5+ compatible with 3.3V microcontrollers?
No, DS1836BS-5+ is a 5V-specific variant (denoted by "-5" suffix) with VCC trip point centered at 4.63V and optimized for 5V systems. For 3.3V applications, use DS1836CS-10+ or DS1836DS-20+, which feature 2.88V and 2.72V trip points respectively. Using DS1836BS-5+ with 3.3V logic may result in improper reset assertion or failure to detect supply faults.
What package type is DS1836BS-5+ supplied in?
DS1836BS-5+ is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package with 150-mil lead pitch, RoHS-compliant, and rated for surface-mount assembly. This package matches industry-standard footprints and supports automated pick-and-place manufacturing. The DS1836BS-5+ pinout is identical to the DIP version but in compact surface-mount form.
DS1836BS-5+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroManager
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1836BS-5+ FAQ
1.How can I place an order for DS1836BS-5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836BS-5+ 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 DS1836BS-5+ reliable?
The price and inventory of DS1836BS-5+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1836BS-5+ is usually 5 days.
3.What payment methods are accepted for DS1836BS-5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836BS-5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836BS-5+?
DS1836BS-5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836BS-5+ 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 DS1836BS-5+?
For technical support, including DS1836BS-5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836BS-5+ requirements.
6.How does Aetrix verify that DS1836BS-5+ is sourced from the original manufacturer or authorized distributors?
All DS1836BS-5+ 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 DS1836BS-5+ meets industry standards.
7.What is the process for return or replacement of DS1836BS-5+?
All DS1836BS-5+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1836BS-5+, 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 DS1836BS-5+ part is unused and in its original packaging.
Return procedure for DS1836BS-5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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