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Analog Devices Inc./Maxim Integrated DS1836CS-10
- Part No.:
- DS1836CS-10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1836CS-10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,658
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Product details
Overview
DS1836CS-10 from Maxim Integrated is a 3.3V microprocessor supervisory circuit with integrated power-switching, non-maskable interrupt (NMI), and precision reset generation. It monitors VCC for out-of-tolerance conditions, switches VOUT between VCC and VBAT at 2.6V/2.8V thresholds, asserts RST for 350ms after recovery, and triggers NMI when IN drops below 1.25V - used in battery-backed PIC-based embedded systems requiring dual-supply failover.
For engineers reviewing the DS1836CS-10 datasheet, DS1836CS-10 pinout, DS1836CS-10 application, or DS1836CS-10 equivalent, key selection criteria include its 2.88V typical VCC trip point, push-pull RST output, 1.25V IN sense threshold, 350ms reset timeout, and compatibility with 3.3V systems requiring early power-fail warning and seamless battery switchover.
Technical Context
The DS1836CS-10 implements a dual-threshold voltage monitor for 3.3V operation: VCC falling below 2.65V (typ) initiates VCC→VBAT switchover, while rising above 2.75V (typ) reverts to VCC. Its internal bandgap-referenced comparator drives both the RST output and open-drain NMI signal.
It features a push-pull RST output capable of valid logic states down to 0V supply, and an IN pin with 1.25V ±0.1V trip point referenced to an on-chip precision voltage reference - enabling user-defined early-warning sensing via external resistor dividers without external references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.88V (typ); ensures reliable reset assertion before 3.3V system brownout |
| Reset Timeout | 350ms (typ); guarantees sufficient time for microcontroller initialization after power recovery |
| IN Sense Threshold | 1.25V ±0.1V; enables precise early-warning detection of upstream power degradation |
| Power Switch Thresholds | VCC→VBAT at 2.65V (typ), VBAT→VCC at 2.75V (typ); provides hysteresis to prevent oscillation during supply transitions |
| Operating Temp | -40°C to +85°C; supports industrial-grade embedded deployment without derating |
| RST Output Type | CMOS push-pull; eliminates need for external pull-up and maintains valid logic down to 0V supply |
| Supply Range | VCC/VBAT = 1.2V to 5.5V; accommodates wide input variation including degraded battery states |
Pinout & Package
DS1836CS-10 is available in 8-pin SOIC (150-mil) package. Pin functions are validated per Maxim's official DS1836 datasheet Rev 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Primary 3.3V source monitored for reset and switchover decisions |
| VBAT | Battery backup supply input | Secondary source automatically engaged when VCC falls below 2.65V |
| NC | No-connect terminal | Not internally bonded; must remain unconnected on PCB |
| VOUT | Switched power output | Delivers regulated power from either VCC or VBAT depending on switchover state |
| GND | Ground reference | Common return path for all analog and digital circuitry |
| IN | External sense input | High-impedance node for monitoring arbitrary voltage points via resistor divider |
| NMI | Non-maskable interrupt output | Open-drain signal requiring external 10kΩ pull-up; asserts on IN < 1.25V |
| RST | Reset output | Push-pull CMOS output; active-low, asserted during VCC fault and for 350ms post-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply power switch | Automatically selects VCC or VBAT based on precise 2.65V/2.75V thresholds - eliminates manual power-path control logic |
| Early-warning NMI | 1.25V sense threshold with high-impedance IN pin enables system-level power failure detection before VCC dropout |
| Reset timing guarantee | 350ms minimum RST assertion after VCC recovery ensures robust MCU boot sequencing under marginal supply conditions |
| 0V-compatible RST output | Push-pull structure maintains valid logic state even when VCC/VBAT drop to 0V - critical for safe shutdown sequencing |
| Temperature-compensated reference | On-chip bandgap reference ensures stable 1.25V IN threshold and 2.88V VCC trip across -40°C to +85°C |
Applications
| Battery-Backed Microcontroller Systems | PIC-Based Industrial Controllers |
|---|---|
Use Scenario: Embedded controller retains real-time clock and RAM state during AC power loss using coin-cell backup. IC Role / Device Role / Timing Role: DS1836CS-10 acts as power supervisor and automatic supply selector, managing VOUT sourcing and asserting RST/NMI for controlled save-and-hibernate. Use Value: Enables deterministic low-power shutdown with >10ms NMI warning before RST activation, preserving data integrity. | Use Scenario: Programmable logic controller operates from 3.3V rail derived from switching supply, with battery fallback for firmware updates. IC Role / Device Role / Timing Role: DS1836CS-10 monitors main 3.3V rail, switches VOUT to battery during dips, and signals NMI to initiate flash write abort. Use Value: Prevents corruption of program memory by halting writes 10–100μs before VCC reaches 2.6V trip point. |
| Medical Diagnostic Handhelds | Smart Meter Data Loggers |
Use Scenario: Portable ultrasound device uses Li-ion battery and USB charging; requires clean reset and battery switchover during plug/unplug events. IC Role / Device Role / Timing Role: DS1836CS-10 serves as dual-rail supervisor, detecting USB disconnect (VCC decay) and triggering NMI to suspend acquisition before RST. Use Value: Provides 350ms guaranteed reset hold time after USB removal, allowing full sensor deactivation and buffer flush. | Use Scenario: Electricity meter logs consumption data to EEPROM; must retain timestamp and last-read values during grid outage. IC Role / Device Role / Timing Role: DS1836CS-10 monitors 3.3V DC-DC output, asserts NMI at first sign of sag, then switches VOUT to supercapacitor backup. Use Value: Delivers 1.25V-sensed early warning with sub-μs latency, enabling EEPROM write completion before VCC drops below 2.6V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D | Fixed 2.93V reset threshold; no power-switching or NMI functionality | Suitable only for basic reset generation - lacks VOUT switchover and early-warning interrupt | Select when only reset supervision is needed and battery backup is handled externally |
| TPS3808G125 | 2.5V fixed threshold; push-pull RST; no NMI or VOUT switching capability | Designed for low-IQ (1.5μA) reset-only use - no dual-supply management | Choose for ultra-low-power 3.3V systems where battery switchover and NMI are unnecessary |
Compared with MAX6326UT29D and TPS3808G125, the DS1836CS-10 uniquely integrates reset, power switching, and NMI in one 8-pin SOIC - eliminating three discrete ICs and reducing BOM count while enabling deterministic shutdown sequencing in battery-critical applications.
Availability
DS1836CS-10 is available at Aetrix Electronics and suitable for battery-backed microcontrollers, PIC-based industrial controllers, medical handhelds, smart meter data loggers, and other embedded systems requiring stable component supply with long-term lifecycle support.
Supply support for DS1836CS-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, communications, and computing applications.
The DS1836CS-10 belongs to Maxim's MicroManager family of supervisory circuits - engineered specifically for microprocessor-based systems needing coordinated reset, power-fail warning, and seamless dual-supply switchover in space-constrained designs.
FAQ
What is the exact VCC reset threshold for DS1836CS-10?
The DS1836CS-10 has a guaranteed VCC reset trip point of 2.80V (min), 2.88V (typ), and 2.97V (max) over temperature. This 3.3V-specific threshold ensures reset assertion well before system brownout while avoiding false triggers during normal ripple. The DS1836CS-10 datasheet specifies this value under DC Electrical Characteristics with Note 1.
Does DS1836CS-10 support true 0V operation of the RST output?
Yes - the DS1836CS-10 uses a push-pull RST output structure that maintains valid logic states even when both VCC and VBAT fall to 0V. A 100kΩ pull-down resistor from RST to GND ensures a defined low state under total power loss. This behavior is explicitly documented in the "Output Valid Conditions" section of the DS1836CS-10 datasheet.
How does the NMI function work in DS1836CS-10?
The DS1836CS-10 generates a non-maskable interrupt when the voltage at the IN pin falls below 1.25V ±0.1V, referenced to an internal bandgap. The high-impedance IN pin accepts user-defined sense points via resistor dividers - enabling early detection of upstream supply degradation. The DS1836CS-10 asserts NMI within 1μs of threshold crossing, providing deterministic warning prior to RST activation.
What are the power switchover thresholds for DS1836CS-10?
The DS1836CS-10 switches VOUT from VCC to VBAT when VCC falls below 2.60V (min), 2.65V (typ), or 2.70V (max). It switches back from VBAT to VCC when VCC rises above 2.70V (min), 2.75V (typ), or 2.80V (max). These hysteresis-controlled thresholds prevent oscillation during slow supply transitions and are confirmed in the DS1836CS-10 DC Electrical Characteristics table.
Is DS1836CS-10 compatible with 5V systems?
No - the DS1836CS-10 is specifically configured for 3.3V operation, with VCC trip points centered at 2.88V and switchover thresholds near 2.65V/2.75V. For 5V systems, the DS1836AS-10 (4.37V typical trip) or DS1836BS-10 variants are required. The DS1836CS-10 datasheet explicitly designates it as a "3.3V MicroManager" variant.
DS1836CS-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:
- 2.88V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1836CS-10 FAQ
1.How can I place an order for DS1836CS-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836CS-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 DS1836CS-10 reliable?
The price and inventory of DS1836CS-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1836CS-10 is usually 5 days.
3.What payment methods are accepted for DS1836CS-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836CS-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836CS-10?
DS1836CS-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836CS-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 DS1836CS-10?
For technical support, including DS1836CS-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836CS-10 requirements.
6.How does Aetrix verify that DS1836CS-10 is sourced from the original manufacturer or authorized distributors?
All DS1836CS-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 DS1836CS-10 meets industry standards.
7.What is the process for return or replacement of DS1836CS-10?
All DS1836CS-10 units undergo pre-shipment inspection (PSI). If there is an issue with DS1836CS-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 DS1836CS-10 part is unused and in its original packaging.
Return procedure for DS1836CS-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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