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Analog Devices Inc./Maxim Integrated DS1832U+
- Part No.:
- DS1832U+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1832U+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
DS1832U+ from Maxim Integrated is a programmable digital thermostat and thermometer IC with 1-Wire® interface, operating across –55°C to +125°C, delivering ±1°C accuracy from 0°C to +85°C, and providing 8-bit (1°C resolution) temperature readings in ≤1 second - used in standalone thermal control systems where minimal external components and single-pin communication are critical.
For engineers reviewing the DS1832U+ datasheet, DS1832U+ pinout, DS1832U+ application, or DS1832U+ equivalent, this page delivers verified package mapping (TO-92), confirmed 3-pin terminal roles (GND/DQ/VDD), functional mode behavior (1-Wire vs. thermostat), nonvolatile trip-point storage, and real-world thermal hysteresis implementation guidance.
Technical Context
The DS1832U+ implements a proprietary direct-to-digital temperature sensor using dual-oscillator architecture: one low-temp-co oscillator presets a counter at –55°C, while a high-temp-co oscillator defines the gate period; iterative counting yields an 8-bit centigrade result. Its 1-Wire interface uses open-drain DQ for bidirectional communication and thermostat output, requiring only a 4.7 kΩ pull-up resistor.
Two nonvolatile operating modes are supported: 1-Wire mode (T/R̄ = 0) enables register read/write of TH/TL trip points, status bits (DONE, NVB, THF, TLF), and temperature data; thermostat mode (T/R̄ = 1) initiates continuous conversions at power-up and drives DQ as a user-polarized (POL bit) hysteresis-controlled output based on EEPROM-stored TH/TL thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –55°C to +125°C - supports operation in harsh industrial, automotive under-hood, and outdoor environments without external compensation. |
| Accuracy | ±1°C from 0°C to +85°C - meets Class B RTD-grade precision for HVAC control and consumer appliance thermostats. |
| Resolution | 8-bit (1°C steps) - provides integer-degree thermal feedback suitable for on/off control logic without floating-point processing. |
| Conversion Time | ≤1 second max - enables responsive thermal monitoring in battery-powered devices and fast-cycle industrial processes. |
| Interface | 1-Wire® (single open-drain DQ pin) - reduces MCU GPIO usage and PCB routing complexity versus I²C/SPI alternatives. |
| Power Supply | 2.7V to 5.5V - compatible with standard 3.3V and 5V logic rails without level-shifting circuitry. |
| Nonvolatile Memory | EEPROM stores TH, TL, T/R̄, POL, 1SHOT - allows pre-programming before system integration for true plug-and-play thermostat deployment. |
Pinout & Package
DS1832U+ is supplied in a 3-pin TO-92 package (lead-free, RoHS-compliant). All pins are electrically defined; no NC terminals exist in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for internal analog sensor and digital logic; must be low-impedance to ensure measurement stability. |
| DQ | Data I/O & Thermostat Output | Open-drain 1-Wire bus node - requires external 4.7 kΩ pull-up; serves as active-high/low thermostat signal when T/R̄ = 1. |
| VDD | Power supply input | Accepts 2.7–5.5 VDC; powers internal oscillator, EEPROM, and comparator; no bypass capacitor required per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Standalone Thermostat Operation | Self-contained thermal switching without host MCU intervention - enabled by EEPROM-stored TH/TL and automatic power-up mode selection (T/R̄ bit). |
| User-Programmable Hysteresis | Independent TH and TL registers allow precise control of on/off temperature bands - critical for preventing relay chatter in heating/cooling systems. |
| Thermostat Output Polarity Control | POL bit configures DQ as active-high or active-low - simplifies interface to NPN/PNP transistors, optocouplers, or logic-level inputs. |
| Temperature Event Flagging | THF and TLF bits latch over-temperature and under-temperature excursions - enables post-mortem diagnostics and fault logging without continuous polling. |
| No External Components Required | Operates with only VDD, GND, DQ, and 4.7 kΩ pull-up - eliminates calibration resistors, op-amps, or ADC references for basic thermal control. |
Applications
| Refrigeration Unit Control | Industrial Motor Overheat Protection |
|---|---|
Use Scenario: Monitoring evaporator coil temperature in commercial refrigerators to maintain setpoint within ±2°C. IC Role / Device Role / Timing Role: Standalone thermostat driving compressor relay via DQ output with user-defined TH = 5°C and TL = 2°C. Use Value: Eliminates need for microcontroller-based control loop - reduces BOM cost and firmware validation burden while ensuring reliable cold-chain integrity. | Use Scenario: Detecting winding overheating in 3-phase AC induction motors during continuous duty cycles. IC Role / Device Role / Timing Role: Direct thermal sensor feeding temperature data to PLC via 1-Wire bus; triggers shutdown if >105°C sustained for >30s. Use Value: Provides factory-calibrated, drift-free temperature measurement over full motor lifetime - avoids thermistor aging errors and analog signal noise in long cable runs. |
| Smart Thermostatic Shower Valve | Medical Infusion Pump Temperature Safety |
Use Scenario: Regulating mixed water temperature in digitally controlled shower systems to prevent scalding (max 43°C). IC Role / Device Role / Timing Role: Dual-function device: reads real-time temp for display (1-Wire mode) and asserts safety cutoff if >45°C (thermostat mode with TH=45°C, TL=42°C). Use Value: Single-component solution satisfies both UI feedback and fail-safe requirements - reduces component count and improves time-to-market for Class II medical-adjacent devices. | Use Scenario: Verifying IV bag fluid temperature remains between 35°C and 40°C during hospital infusion therapy. IC Role / Device Role / Timing Role: Embedded temperature monitor with nonvolatile TH/TL registers pre-programmed to alarm thresholds; DQ drives audible alert when exceeded. Use Value: Meets IEC 60601-1 thermal safety compliance without external watchdog timer - leverages built-in THF/TLF flags for audit-trail-capable event logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable digital thermostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS18B20+ | 12-bit resolution (0.0625°C), parasite-power capable, supports multi-drop 1-Wire networks; larger SO-8 package. | Requires host MCU for all operations - no standalone thermostat mode or nonvolatile TH/TL storage. | Select when higher resolution or multi-sensor bus topology is needed; not suitable for drop-in replacement in thermostat-only designs. |
| LMT70AYPWR | Analog output (ratiometric voltage), 0.1°C typical accuracy, 0.5ms response time; requires external ADC and microcontroller. | No built-in logic or memory - cannot function as autonomous thermostat; needs full signal chain design. | Choose for ultra-fast thermal response or integration into existing ADC-based systems; adds design complexity versus DS1832U+'s self-contained operation. |
Compared with DS18B20+, DS1832U+ trades resolution for autonomous operation and simpler hardware integration; compared with LMT70AYPWR, it replaces analog signal conditioning with digital decision-making - making DS1832U+ optimal for cost-sensitive, low-component-count thermal safety applications requiring immediate, deterministic action.
Availability
DS1832U+ is available at Aetrix Electronics and suitable for refrigeration unit control, industrial motor protection, smart shower valves, medical infusion pumps, and HVAC zone sensors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DS1832U+ 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 digital ICs for industrial, medical, communications, and consumer applications.
The DS1832U+ belongs to Maxim's 1-Wire temperature sensor family, engineered specifically for applications demanding autonomous thermal decision-making with minimal external components and robust operation across extreme temperatures.
FAQ
What is the operating voltage range for DS1832U+?
The DS1832U+ operates from 2.7 V to 5.5 V DC. This wide supply range allows direct compatibility with both 3.3 V and 5 V system rails without regulation or level shifting. The DS1832U+ maintains specified accuracy and timing performance across this entire range, as confirmed in the DC Electrical Characteristics table of the official datasheet.
Does DS1832U+ support parasitic power mode?
No, DS1832U+ does not support parasitic power mode. It requires connection to VDD for operation - unlike some other 1-Wire devices such as the DS18B20. The DS1832U+ datasheet explicitly specifies VDD as a mandatory supply pin, and all functional descriptions assume externally powered operation. Attempting parasitic power will result in undefined behavior or failure to initialize.
How is hysteresis implemented in DS1832U+ thermostat mode?
Hysteresis in DS1832U+ is implemented via two independent, nonvolatile EEPROM registers: TH (trip-high) and TL (trip-low). When temperature exceeds TH, DQ activates; it remains active until temperature falls below TL. The DS1832U+ does not auto-calculate hysteresis - users must program distinct values into TH and TL to define the desired band, enabling precise control of relay cycling or alarm persistence.
Can DS1832U+ be reconfigured between 1-Wire and thermostat modes after deployment?
Yes, DS1832U+ can be reconfigured between modes after deployment by rewriting the T/R̄ bit in its status/configuration register. This requires temporarily entering 1-Wire mode (via VDD toggle and DQ strobing), issuing a Write Status command with updated T/R̄ value, and confirming the change. The new mode persists across power cycles due to EEPROM storage - a key feature confirmed in the Operating Modes section of the DS1832U+ datasheet.
What is the maximum conversion time for DS1832U+ temperature readings?
The maximum conversion time for DS1832U+ is 1 second, as specified in the Features section and confirmed in the Timing Characteristics table. This applies to both one-shot and continuous conversion modes. The DONE bit in the status register transitions from 0 to 1 precisely upon completion, allowing host software to poll for readiness without fixed delays - a behavior validated in the OPERATION – MEASURING TEMPERATURE section.
DS1832U+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.55V, 2.88V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 250ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1832U+ FAQ
1.How can I place an order for DS1832U+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1832U+ 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 DS1832U+ reliable?
The price and inventory of DS1832U+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1832U+ is usually 5 days.
3.What payment methods are accepted for DS1832U+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1832U+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1832U+?
DS1832U+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1832U+ 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 DS1832U+?
For technical support, including DS1832U+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1832U+ requirements.
6.How does Aetrix verify that DS1832U+ is sourced from the original manufacturer or authorized distributors?
All DS1832U+ 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 DS1832U+ meets industry standards.
7.What is the process for return or replacement of DS1832U+?
All DS1832U+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1832U+, 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 DS1832U+ part is unused and in its original packaging.
Return procedure for DS1832U+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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