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Analog Devices Inc./Maxim Integrated DS1836BS-10
- Part No.:
- DS1836BS-10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1836BS-10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
DS1836BS-10 from Maxim Integrated is a 3.3V microprocessor supervisory circuit with integrated power-switching, precision voltage monitoring, and non-maskable interrupt (NMI) generation. It monitors VCC for out-of-tolerance conditions, asserts RST for 350ms after recovery, switches VOUT between VCC and VBAT at 2.6V/2.8V 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 DS1836BS-10 datasheet, DS1836BS-10 pinout, DS1836BS-10 application, or DS1836BS-10 equivalent, key selection considerations include its 2.8V VCC-to-VBAT switch threshold, 1.25V IN trip point, push-pull RST output, -40°C to +85°C operation, and compatibility with 3.3V microcontroller reset timing requirements.
Technical Context
The DS1836BS-10 implements a dual-threshold comparator architecture for VCC monitoring: it initiates power switching when VCC crosses 2.8V (rise) or 2.6V (fall), and asserts reset when VCC falls outside its 2.88V (typ) trip window. Its internal bandgap reference enables stable 1.25V sensing at the IN pin across temperature.
It integrates three independent functions: (1) power-on/power-fail reset with 350ms timeout, (2) automatic VCC/VBAT switchover with hysteresis, and (3) high-impedance NMI trigger via external resistor divider - all operating from a single 3.3V supply with ≤50μA typical ICC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.88V (typ), ±0.07V tolerance - defines precise 3.3V supply fault detection threshold |
| VCC-to-VBAT Switch Threshold | Rising: 2.80V (min), falling: 2.60V (min) - provides 200mV hysteresis for clean power-source handoff |
| IN Trip Voltage | 1.25V (typ), ±0.10V - enables configurable early-warning sensing of higher-voltage rails via resistor divider |
| RST Active Duration | 350ms (typ) after VCC recovery - ensures microcontroller reset hold time meets PIC and ARM boot requirements |
| Operating Current | 30–50μA (typ) at 3.6V - supports ultra-low-power battery-backed operation |
| Temperature Range | -40°C to +85°C - qualified for industrial-grade embedded control environments |
| Output Type | CMOS push-pull RST, open-drain NMI - eliminates external pull-up for RST; requires 10kΩ pull-up for NMI |
Pinout & Package
DS1836BS-10 is available in an 8-pin SOIC (150-mil width) surface-mount package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 3.3V nominal input; monitored for reset and switch control |
| VBAT | Battery backup supply input | Provides VOUT source when VCC drops below 2.6V |
| NC | No-connect terminal | Not internally bonded; must be left unconnected |
| VOUT | Switched power output | Delivers regulated power from VCC or VBAT - not a regulator, but a low-loss analog switch |
| GND | Ground reference | Common return for all analog and digital functions |
| IN | External sense input | High-impedance comparator input referenced to 1.25V internal bandgap |
| NMI | Non-maskable interrupt output | Open-drain signal asserted when IN < 1.25V; requires external pull-up |
| RST | Reset output | CMOS push-pull active-low reset signal with guaranteed 350ms pulse width |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply power switching | Automatically routes VOUT from VCC to VBAT at 2.6V fall threshold, eliminating need for external diode-OR or load switches |
| Programmable early-warning NMI | 1.25V precision comparator on IN pin enables system-level shutdown before VCC collapse - extends safe shutdown window by >10ms vs. reset-only solutions |
| Guaranteed reset timing | 350ms RST assertion after VCC recovery ensures reliable initialization of 3.3V MCUs without external RC timing components |
| Low-quiescent current operation | ≤50μA typical ICC at 3.6V allows continuous supervision in battery-critical applications such as RTC backup circuits |
| Industrial temperature support | Full functionality over -40°C to +85°C enables deployment in automotive body controllers and industrial PLC I/O modules |
Applications
| Embedded Microcontroller Reset | PIC-Based System Supervision |
|---|---|
Use Scenario: Power sequencing and brown-out protection for 3.3V PIC18F and PIC24H microcontrollers in portable instrumentation. IC Role / Device Role / Timing Role: Primary reset supervisor and VCC monitor; asserts RST during undervoltage and holds for 350ms post-recovery. Use Value: Eliminates discrete RC reset networks and guarantees reset compliance with PIC's tPD specification under variable line conditions. | Use Scenario: Dual-supply failover in battery-backed data loggers using PIC16LF193x with real-time clock. IC Role / Device Role / Timing Role: Seamless VCC-to-VBAT switchover at 2.6V/2.8V thresholds while maintaining active reset and NMI signaling. Use Value: Enables uninterrupted RTC and SRAM retention during AC loss without firmware intervention or external power-path ICs. |
| Early Power-Fail Warning | Industrial Sensor Node Power Management |
Use Scenario: Preemptive shutdown in 24V-powered industrial sensors before main supply collapse. IC Role / Device Role / Timing Role: High-impedance IN pin senses scaled-down 24V rail via resistor divider; triggers NMI at 1.25V threshold. Use Value: Provides ≥15ms advance warning before RST activation, enabling EEPROM save, GPIO safe-state transition, and controlled sensor deactivation. | Use Scenario: Power integrity management in LoRaWAN end-nodes powered by LiSOCl₂ batteries and 3.3V DC-DC converters. IC Role / Device Role / Timing Role: Monitors converter output (VCC) and battery (VBAT); manages VOUT sourcing and asserts RST/NMI during brownout or battery depletion. Use Value: Reduces BOM count by replacing discrete supervisors, comparators, and power-path MOSFETs - validated at -40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–26D | Fixed 2.63V reset threshold; no power-switching or NMI functionality | Suitable only for basic reset generation - lacks VCC/VBAT switchover and early-warning interrupt | Select when only reset supervision is needed and dual-supply operation is handled externally |
| TPS3808G125 | Adjustable reset threshold (via external resistor); no integrated power switch or NMI output | Requires external circuitry for battery switchover and early-warning sensing | Choose for flexible threshold tuning in systems where power path is managed separately |
Compared with MAX6326–26D and TPS3808G125, the DS1836BS-10 uniquely integrates reset, power switching, and NMI in one 8-pin SOIC - reducing board area by ~40% and eliminating 3–5 discrete components in dual-supply PIC systems.
Availability
DS1836BS-10 is available at Aetrix Electronics and suitable for embedded microcontroller reset, battery-backed data logging, industrial sensor node power management, and early power-fail warning applications requiring stable component supply and long-term industrial temperature support.
Supply support for DS1836BS-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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and computing applications.
The DS1836BS-10 belongs to the MicroManager family of supervisory circuits engineered specifically for 3.3V microcontroller systems needing coordinated reset, power switchover, and preemptive power-fail signaling - targeting PIC, ARM Cortex-M0/M3, and other low-voltage embedded processors.
FAQ
What is the exact VCC reset threshold for DS1836BS-10?
The DS1836BS-10 has a specified RST VCC trip point of 2.80V (min), 2.88V (typ), and 2.97V (max) - calibrated for 3.3V systems. This threshold is factory-trimmed and temperature-compensated using an internal bandgap reference, ensuring consistent brown-out detection across -40°C to +85°C without external calibration.
Does DS1836BS-10 support true 0V VCC operation for RST output?
Yes - the DS1836BS-10 RST output uses a push-pull structure that maintains valid logic levels even when VCC drops to 0V, provided a 100kΩ pull-down resistor is connected from RST to GND. This feature ensures deterministic reset state during complete power loss, critical for preserving SRAM or RTC data in battery-backed systems.
How does the NMI function work on DS1836BS-10?
The DS1836BS-10 NMI output is an open-drain signal triggered when the voltage at the IN pin falls below 1.25V (typ). The IN pin is high-impedance and references an internal bandgap, allowing users to configure early-warning sensing of any DC rail - e.g., a 24V supply scaled via resistor divider - delivering NMI ≥10ms before RST activation.
What is the power-switching behavior of DS1836BS-10 between VCC and VBAT?
At power-up, DS1836BS-10 initially supplies VOUT from VBAT until VCC rises above 2.80V (min); then it switches to VCC. If VCC later falls below 2.60V (min), VOUT reverts to VBAT. The 200mV hysteresis prevents oscillation during marginal VCC conditions, and VOUT tracks the active supply minus ≤0.3V drop - no external MOSFETs required.
Is DS1836BS-10 pin-compatible with other DS1836 variants like DS1836AS-10?
No - DS1836BS-10 is not pin-compatible with DS1836AS-10. While both share identical pinouts and package, DS1836AS-10 uses 5V-specific thresholds (4.25V–4.50V trip), whereas DS1836BS-10 is optimized for 3.3V operation (2.80V–2.97V trip). Swapping them risks incorrect reset timing or failure to assert RST under actual 3.3V brown-out conditions.
DS1836BS-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroManager
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1836BS-10 FAQ
1.How can I place an order for DS1836BS-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836BS-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 DS1836BS-10 reliable?
The price and inventory of DS1836BS-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1836BS-10 is usually 5 days.
3.What payment methods are accepted for DS1836BS-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836BS-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836BS-10?
DS1836BS-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836BS-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 DS1836BS-10?
For technical support, including DS1836BS-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836BS-10 requirements.
6.How does Aetrix verify that DS1836BS-10 is sourced from the original manufacturer or authorized distributors?
All DS1836BS-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 DS1836BS-10 meets industry standards.
7.What is the process for return or replacement of DS1836BS-10?
All DS1836BS-10 units undergo pre-shipment inspection (PSI). If there is an issue with DS1836BS-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 DS1836BS-10 part is unused and in its original packaging.
Return procedure for DS1836BS-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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