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Analog Devices Inc./Maxim Integrated DS1836AS-5+
- Part No.:
- DS1836AS-5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1836AS-5+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
DS1836AS-5+ from Maxim Integrated is a 5V microprocessor supervisory circuit combining power-on reset, dual-supply power switching (VCC/VBAT), and non-maskable interrupt generation. It asserts reset for 350ms after VCC returns to tolerance, switches VOUT to battery at 3.8V, and triggers NMI when IN drops below 1.25V - used in PIC-based embedded systems with backup power requirements.
For engineers reviewing the DS1836AS-5+ datasheet, DS1836AS-5+ pinout, DS1836AS-5+ application, or DS1836AS-5+ equivalent, key selection criteria include VCC trip point (4.63V typ), 350ms reset timeout, push-pull RST output, NMI sensing capability, and 8-pin SOIC package compatibility with legacy DIP footprints.
Technical Context
The DS1836AS-5+ integrates three synchronized functions: precision voltage monitoring using an internal bandgap reference, automatic power-source switchover between VCC and VBAT, and early-warning NMI generation via high-impedance IN pin. Its reset assertion logic is temperature-compensated and immune to fast transients.
It operates across -40°C to +85°C with supply inputs from 1.2V to 5.5V, maintains valid RST output down to 0V VCC (via external pull-down), and supports dual-voltage systems requiring fail-safe brownout detection and graceful shutdown sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.63V typical; ensures reliable reset activation during 5V supply brownout before critical logic fails |
| Reset Timeout | 350ms minimum; guarantees sufficient stabilization time for microcontroller startup and peripheral initialization |
| NMI Threshold | 1.25V on IN pin; enables user-configurable early warning of power loss using external resistor divider |
| Power Switch Threshold | VCC-to-VBAT switch at 3.8V; maintains uninterrupted VOUT during main supply collapse |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded control and automotive body electronics |
| Supply Current | 35–55μA at 5.5V; enables long-term battery-backed operation without significant drain |
| Output Type | Push-pull RST; eliminates need for external pull-up and supports direct CMOS input driving |
Pinout & Package
DS1836AS-5+ is housed in an 8-pin SOIC (150-mil) surface-mount package, pin-compatible with the through-hole 8-pin DIP variant. The package supports reflow soldering per JEDEC J-STD-020 and has a maximum soldering temperature of 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 5V nominal input; monitored for out-of-tolerance condition to trigger reset and power switch |
| VBAT | Backup battery supply input | Provides continuous VOUT during VCC failure; leakage <0.1μA in off state |
| NC | No-connect terminal | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| VOUT | Switched power output | Delivers regulated power from VCC or VBAT depending on real-time voltage comparison |
| GND | Ground reference | Common return path for all analog and digital circuitry; requires low-impedance PCB connection |
| IN | High-impedance sense input | Monitors external voltage divider; trips NMI at 1.25V with ±0.1V tolerance over temperature |
| NMI | Open-drain non-maskable interrupt | Requires external 10kΩ pull-up; signals imminent power loss before RST assertion |
| RST | Push-pull reset output | Drives microcontroller reset pin directly; remains valid even if VCC falls to 0V (with 100kΩ pull-down) |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated voltage reference | Enables stable 4.63V VCC trip point across -40°C to +85°C without external calibration |
| Dual-supply power switching | Automatically selects highest valid source (VCC or VBAT) for VOUT, eliminating manual switchover circuitry |
| Early-warning NMI generation | Provides >10μs advance notice of power failure relative to RST assertion, enabling controlled data save |
| 0V-VCC reset validity | Push-pull RST output sustains logic-low state even when VCC = 0V, ensuring deterministic reset behavior |
| Low quiescent current | 55μA max ICC at 5.5V allows multi-year operation on coin-cell backup without capacity exhaustion |
Applications
| Industrial PLC Controller | PIC-Based Data Logger |
|---|---|
Use Scenario: Programmable logic controller operating from 24V DC supply with supercapacitor backup. IC Role / Device Role / Timing Role: Supervisory IC providing brownout detection, backup power handoff, and pre-failure NMI signaling. Use Value: Enables safe I/O state freeze and EEPROM write completion before main power collapse. | Use Scenario: Battery-powered environmental sensor node recording temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Power manager coordinating PIC16F877A reset timing, VBAT switchover, and low-power wake-up interrupt. Use Value: Extends operational lifetime by minimizing backup current draw while guaranteeing clean restart after power recovery. |
| Medical Infusion Pump | Automotive Body Control Module |
Use Scenario: Life-critical infusion device powered from AC adapter with Li-ion backup. IC Role / Device Role / Timing Role: Safety-critical supervisor asserting RST and NMI to halt motor control and log fault events prior to shutdown. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic 350ms reset hold and dual-voltage monitoring. | Use Scenario: In-vehicle lighting and window control module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Voltage monitor detecting battery sag below 9V and initiating graceful MCU reset before undervoltage lockout. Use Value: Prevents firmware corruption during engine start by holding reset until stabilized 13.2V system voltage is confirmed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX692AESA+ | Fixed 4.65V reset threshold; no NMI output; only VCC monitoring (no VBAT switchover) | Suitable for single-supply systems where backup power management is handled externally | Select when only basic reset supervision is needed and board space permits larger SO-8 footprint |
| TPS3823-50DBVR | 3.0V fixed threshold; open-drain RST; no power-switching or NMI functionality | Designed for low-voltage microcontrollers (e.g., MSP430) without battery backup requirements | Choose for cost-sensitive 3.3V designs where early-warning interrupt and dual-supply handoff are unnecessary |
Compared with MAX692AESA+ and TPS3823-50DBVR, the DS1836AS-5+ uniquely integrates reset, power switching, and NMI in one 8-pin SOIC - reducing BOM count by two ICs and enabling predictive shutdown in battery-backed systems.
Availability
DS1836AS-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, PIC-based data loggers, medical infusion pumps, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for DS1836AS-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, medical, and communications applications.
The DS1836AS-5+ belongs to Maxim's MicroManager family of supervisory circuits, engineered specifically for microprocessor-based systems needing coordinated reset, power fail detection, and backup supply management in space-constrained designs.
FAQ
What is the exact VCC reset threshold voltage for DS1836AS-5+?
The DS1836AS-5+ has a guaranteed VCC reset threshold of 4.50V to 4.75V, with a typical value of 4.63V at 25°C. This 5V-specific trip point is factory-trimmed and temperature-compensated to maintain accuracy across the full -40°C to +85°C operating range, ensuring consistent reset behavior during brownout events without external adjustment.
Does DS1836AS-5+ support true 0V-VCC reset assertion?
Yes, DS1836AS-5+ supports valid RST output down to 0V VCC using its push-pull architecture. When VCC collapses, a 100kΩ pull-down resistor from RST to GND maintains a logic-low state, guaranteeing deterministic reset hold. This feature is explicitly validated in the datasheet Figure 5 and distinguishes DS1836AS-5+ from open-drain alternatives that lose output validity below ~1.2V.
How does the NMI function differ from the RST output in DS1836AS-5+?
The NMI output in DS1836AS-5+ provides early warning of impending power failure - triggering when the IN pin voltage drops below 1.25V - while RST activates later when VCC itself falls below 4.63V. NMI is open-drain and requires a 10kΩ pull-up; RST is push-pull and drives directly. This two-stage alert enables time-critical actions like EEPROM save before full reset occurs.
Can DS1836AS-5+ operate with both 3.3V and 5V supplies?
No, DS1836AS-5+ is specifically configured for 5V operation, as indicated by the "-5+" suffix and its 4.63V VCC trip point. For 3.3V systems, Maxim offers DS1836CS-3+ (2.88V trip) or DS1836DS-3+. Using DS1836AS-5+ on a 3.3V rail would prevent reset assertion during brownout, compromising system reliability.
What package options are available for DS1836AS-5+?
DS1836AS-5+ is supplied exclusively in an 8-pin SOIC (150-mil) surface-mount package, designated by the "S" in the part number. While the DS1836A family also includes through-hole DIP variants, the DS1836AS-5+ variant is not offered in DIP; its SOIC footprint matches industry-standard 150-mil SO-8 layouts and supports automated reflow assembly.
DS1836AS-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 Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1836AS-5+ FAQ
1.How can I place an order for DS1836AS-5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1836AS-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 DS1836AS-5+ reliable?
The price and inventory of DS1836AS-5+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1836AS-5+ is usually 5 days.
3.What payment methods are accepted for DS1836AS-5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1836AS-5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1836AS-5+?
DS1836AS-5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1836AS-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 DS1836AS-5+?
For technical support, including DS1836AS-5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1836AS-5+ requirements.
6.How does Aetrix verify that DS1836AS-5+ is sourced from the original manufacturer or authorized distributors?
All DS1836AS-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 DS1836AS-5+ meets industry standards.
7.What is the process for return or replacement of DS1836AS-5+?
All DS1836AS-5+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1836AS-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 DS1836AS-5+ part is unused and in its original packaging.
Return procedure for DS1836AS-5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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