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Analog Devices Inc./Maxim Integrated DS1836CS-10+T&R
- Part No.:
- DS1836CS-10+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1836CS-10+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
DS1836CS-10+T&R from Maxim Integrated is a 3.3V microprocessor supervisory circuit with dual-supply power switching, non-maskable interrupt (NMI), and precision reset timing. 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 battery backup and early power-fail warning.
For engineers reviewing the DS1836CS-10+T&R datasheet, DS1836CS-10+T&R pinout, DS1836CS-10+T&R application, or DS1836CS-10+T&R equivalent, key selection criteria include its 2.88V VCC reset trip point (typ), 2.65V VCC-to-VBAT switch threshold (typ), CMOS push-pull RST output, -40°C to +85°C operation, and 8-pin SOIC package compatibility with legacy DIP footprints.
Technical Context
The DS1836CS-10+T&R implements a precision bandgap-referenced comparator for VCC monitoring and IN sense input, with hysteresis built into its power-switching logic to prevent chatter during supply transitions. Its RST output uses a push-pull structure enabling valid logic levels down to 0V VCC, while the open-drain NMI requires an external 10kΩ pull-up.
It operates across 1.2V–5.5V supply range, supports true 3.3V system design, and delivers 100mA VOUT sourcing capability from either VCC or VBAT - with trip points specifically calibrated for DS1836C/D variants: 2.88V (typ) reset assertion, 2.65V (typ) VCC→VBAT switchover, and 2.75V (typ) VBAT→VCC restoration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Trip Point | 2.80V to 2.97V (DS1836C/D-10); ensures reliable reset assertion before 3.3V rail collapse |
| VCC→VBAT Switch Threshold | 2.60V to 2.70V (typ 2.65V); initiates battery backup before main supply becomes unusable |
| Reset Pulse Width | 200ms to 500ms (typ 350ms); guarantees sufficient time for microcontroller initialization |
| IN Sense Trip Voltage | 1.15V to 1.35V (typ 1.25V); enables customizable early-warning voltage monitoring via resistor divider |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded environments |
| Supply Current | 30μA to 50μA at 3.6V; ultra-low quiescent draw preserves battery life in backup mode |
| VOUT Drive Capability | 100mA continuous; powers downstream logic or real-time clock without external FET |
Pinout & Package
DS1836CS-10+T&R is supplied in an 8-pin SOIC (150-mil width) surface-mount package, compatible with standard 8-pin DIP layouts. Pin 1 is VCC, pin 2 is VBAT, pin 3 is NC, pin 4 is VOUT, pin 5 is RST, pin 6 is NMI, pin 7 is IN, and pin 8 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Primary 3.3V rail input; monitored for reset generation and VOUT source selection |
| VBAT | Battery backup supply input | Secondary supply activated when VCC falls below 2.65V; powers VOUT during main supply loss |
| NC | No-connect terminal | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| VOUT | Switched power output | Delivers regulated 3.3V-equivalent output sourced dynamically from VCC or VBAT |
| RST | Active-low reset output | Push-pull CMOS output asserting low for ≥350ms after VCC recovery; valid down to 0V VCC |
| NMI | Non-maskable interrupt output | Open-drain output pulled high externally; signals imminent power failure before RST activation |
| IN | External sense input | High-impedance comparator input referenced to 1.25V; accepts divided-down system voltages for early detection |
| GND | Ground reference | Common return path for all supplies, outputs, and internal reference circuits |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply power switching | Automatically selects VCC or VBAT as VOUT source based on precise 2.65V/2.75V thresholds - eliminates manual switchover circuitry |
| Early-warning NMI generation | Triggers interrupt at 1.25V IN threshold, providing >10μs advance notice before RST assertion - enables graceful shutdown |
| 0V-VCC-valid RST output | Push-pull RST maintains logic-low state even when VCC collapses to 0V - ensures deterministic reset under total power loss |
| Temperature-compensated reference | Internal bandgap reference stabilizes trip points across -40°C to +85°C - avoids calibration drift in industrial environments |
| Low-quiescent-current operation | 30–50μA typical ICC at 3.6V - extends battery backup runtime in always-on monitoring applications |
Applications
| Industrial PLC I/O Modules | PIC-Based Smart Sensors |
|---|---|
Use Scenario: Maintaining real-time clock and configuration memory during AC mains interruption in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory controller providing battery-backed VOUT, early NMI warning, and guaranteed 350ms reset pulse for PIC MCU recovery. Use Value: Prevents data corruption and ensures deterministic restart by isolating power loss events from system logic using calibrated 2.65V switchover and 1.25V sense thresholds. | Use Scenario: Enabling autonomous sensor node operation with seamless transition from line power to coin-cell backup during field deployment. IC Role / Device Role / Timing Role: Dual-rail supervisor managing 3.3V system power, generating NMI for firmware-triggered save operations, and sustaining RTC power via VOUT. Use Value: Eliminates discrete diode-OR and reset ICs - reduces BOM count by 3 components while guaranteeing 100mA VOUT delivery and sub-10μs NMI response. |
| Medical Infusion Pumps | Energy Meter Data Loggers |
Use Scenario: Preserving dose history and motor control state during brief brownouts in battery-assisted infusion devices. IC Role / Device Role / Timing Role: Power integrity manager asserting RST only after confirmed VCC recovery and triggering NMI at first sign of droop to initiate safe motor stop. Use Value: Meets IEC 60601-1 fault-response timing requirements via 350ms min reset hold and 2.65V validated switchover - no additional timing capacitors needed. | Use Scenario: Securing metering data during grid instability in smart electricity meters with supercapacitor or Li-SOCl₂ backup. IC Role / Device Role / Timing Role: System supervisor monitoring both 3.3V logic rail and higher-voltage analog supply via IN divider, coordinating backup activation and nonvolatile write completion. Use Value: Enables single-chip solution for dual-rail monitoring: VCC trip (2.88V), IN-sensed rail trip (1.25V), and 100mA VOUT drive - replaces discrete supervisor + load switch + comparator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–26D3+T | Fixed 2.63V reset threshold; no power-switching or NMI functionality; SOT23-5 package | Provides basic reset only - lacks VOUT switching and early-warning interrupt required for battery-backup systems | Select only if application needs simple reset supervision without backup management |
| TPS3808G12DBVR | 1.2V reset threshold; no VOUT switching; open-drain RST; 6-pin SOT23 package | Designed for ultra-low-voltage MCUs - incompatible with 3.3V trip-point requirements and dual-supply architecture | Choose only for sub-1.8V systems where DS1836CS-10+T&R's 2.88V trip is too high |
Compared with MAX6326–26D3+T and TPS3808G12DBVR, DS1836CS-10+T&R uniquely integrates reset generation, battery switchover, and NMI in one 8-pin SOIC - eliminating three discrete functions while maintaining precise 2.65V/2.75V hysteresis and 0V-VCC RST validity essential for fail-safe embedded designs.
Availability
DS1836CS-10+T&R is available at Aetrix Electronics and suitable for industrial PLC I/O modules, PIC-based smart sensors, medical infusion pumps, and energy meter data loggers requiring stable component supply and long-term lifecycle support.
Supply support for DS1836CS-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 and mixed-signal ICs for industrial, automotive, and communications applications - emphasizing reliability, integration, and thermal robustness.
The DS1836CS-10+T&R belongs to Maxim's MicroManager family of supervisory circuits, engineered specifically for microprocessor-based systems needing coordinated power monitoring, battery backup, and deterministic reset behavior in space-constrained industrial environments.
FAQ
What is the exact VCC reset trip point for DS1836CS-10+T&R?
The DS1836CS-10+T&R has a guaranteed VCC reset trip point of 2.80V (min) to 2.97V (max), with 2.88V typical - calibrated for 3.3V systems and distinct from DS1836A/B variants. This value is specified in the DC Electrical Characteristics table under "RST VCC Trip Point DS1836C(or D)-10" and applies directly to DS1836CS-10+T&R as a C-series device.
Does DS1836CS-10+T&R support battery backup switching, and what are the thresholds?
Yes, DS1836CS-10+T&R supports automatic VOUT switching between VCC and VBAT. For C/D variants like DS1836CS-10+T&R, it switches from VCC to VBAT when VCC falls below 2.60V–2.70V (typ 2.65V), and back to VCC when VCC rises above 2.70V–2.80V (typ 2.75V). These thresholds are factory-trimmed and temperature-compensated.
How does the NMI function work on DS1836CS-10+T&R, and what external components are required?
The NMI output on DS1836CS-10+T&R is an open-drain signal triggered when the IN pin voltage drops below 1.15V–1.35V (typ 1.25V). A 10kΩ pull-up resistor to VCC or VBAT is mandatory for proper logic-high state. The IN pin accepts user-defined sense points via resistor dividers - e.g., to monitor a 4.5V rail using R1=260kΩ and R2=100kΩ as shown in Maxim's Figure 3.
Is DS1836CS-10+T&R compatible with 0V VCC operation, and how is RST maintained?
Yes, DS1836CS-10+T&R's RST output remains valid even when VCC drops to 0V, thanks to its push-pull structure. Unlike open-drain supervisors, it actively drives low without external pull-down. However, if sustained low-state current is needed below 1.2V, a 100kΩ pull-down resistor from RST to GND may be added - as documented in Figure 5 of the datasheet.
What package type and footprint does DS1836CS-10+T&R use, and is it pin-compatible with through-hole versions?
DS1836CS-10+T&R uses an 8-pin SOIC package (150-mil width) with standard JEDEC MS-012AC dimensions. Its pinout matches the 8-pin DIP variant (300-mil), enabling drop-in replacement on PCBs designed for through-hole assembly - provided the SOIC pad layout follows recommended land patterns for thermal and mechanical reliability.
DS1836CS-10+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroManager
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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+T&R FAQ
1.How can I place an order for DS1836CS-10+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836CS-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 DS1836CS-10+T&R reliable?
The price and inventory of DS1836CS-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 DS1836CS-10+T&R is usually 5 days.
3.What payment methods are accepted for DS1836CS-10+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836CS-10+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836CS-10+T&R?
DS1836CS-10+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836CS-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 DS1836CS-10+T&R?
For technical support, including DS1836CS-10+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836CS-10+T&R requirements.
6.How does Aetrix verify that DS1836CS-10+T&R is sourced from the original manufacturer or authorized distributors?
All DS1836CS-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 DS1836CS-10+T&R meets industry standards.
7.What is the process for return or replacement of DS1836CS-10+T&R?
All DS1836CS-10+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1836CS-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 DS1836CS-10+T&R part is unused and in its original packaging.
Return procedure for DS1836CS-10+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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