My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1832U/T&R
- Part No.:
- DS1832U/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1832U/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,030
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1832U/T&R from Maxim Integrated is a programmable digital thermostat and thermometer IC with 1-Wire® interface, operating over –55°C to +125°C, delivering ±1°C accuracy from 0°C to +85°C, 8-bit (1°C resolution) temperature readings, and standalone thermostat functionality using user-defined TH/TL trip-points - used in industrial thermal monitoring and embedded thermostatic control.
For engineers reviewing the DS1832U/T&R datasheet, DS1832U/T&R pinout, DS1832U/T&R application, or DS1832U/T&R equivalent, this page provides verified package mapping (8-pin SO), confirmed 1-Wire timing compliance, nonvolatile TH/TL register behavior, DQ open-drain output polarity control (POL bit), and real-world thermostat hysteresis implementation guidance.
Technical Context
The DS1832U/T&R implements a proprietary direct-to-digital temperature sensor using dual-oscillator architecture: a low-temp-co oscillator drives a presettable counter gated by a high-temp-co oscillator, enabling centigrade measurement without external calibration. Its 1-Wire interface uses strict timing-defined reset/presence pulses and read/write time slots, requiring only one microcontroller I/O pin and a 4.7 kΩ pull-up resistor.
Two mutually exclusive operating modes are controlled by the nonvolatile T/R̄ bit: 1-Wire mode enables register read/write (TH, TL, status/configuration) and on-demand temperature conversion; thermostat mode initiates continuous conversions at power-up and configures DQ as an active-high or active-low open-drain output based on POL bit state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –55°C to +125°C - supports operation in harsh environments including automotive under-hood and industrial motor control enclosures. |
| Accuracy | ±1°C from 0°C to +85°C - meets Class B requirements for commercial/industrial temperature sensing without system-level compensation. |
| Resolution | 8-bit (1°C increment) - provides integer-degree centigrade output directly usable in firmware without floating-point math. |
| Conversion Time | ≤1 second max - enables responsive thermal shutdown decisions in safety-critical systems. |
| Interface | 1-Wire® (single open-drain DQ line + pull-up) - reduces PCB routing complexity and eliminates need for dedicated ADC or I²C bus resources. |
| Power Supply | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level-shifting circuitry. |
| Nonvolatile Memory | EEPROM stores TH, TL, T/R̄, POL, 1SHOT bits - allows pre-programming before system integration for true plug-and-play thermostat deployment. |
Pinout & Package
DS1832U/T&R is supplied in an 8-pin SO (208-mil) tape-and-reel package. Pin 1 is DQ (open-drain data I/O and thermostat output), Pin 2 is GND, Pin 3 is VDD, and Pins 4–8 are no-connect terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DQ (Pin 1) | Open-drain bidirectional I/O | Serves as 1-Wire data line in communication mode; becomes active-high/low thermostat output in T/R̄=1 mode - requires external 4.7 kΩ pull-up to VDD. |
| GND (Pin 2) | Ground reference | Primary return path for internal temperature sensor and I/O circuitry - must be connected to system ground plane with low-impedance trace. |
| VDD (Pin 3) | Power supply input | Supplies core logic and sensor circuitry across 2.7V–5.5V range - decoupling capacitor (0.1 µF) recommended within 5 mm of pin. |
| Pins 4–8 | No Connect | Internally unconnected - must remain unpopulated and unconnected on PCB to avoid parasitic coupling or ESD paths. |
Key Features
| Feature | Design Value |
|---|---|
| Standalone Thermostat Mode | Enables immediate thermal protection at power-up without host MCU involvement - DQ asserts when temperature exceeds TH and deasserts only after falling below TL, providing hardware-enforced hysteresis. |
| User-Programmable Trip-Points | TH and TL registers store 8-bit two's complement values in EEPROM - allows field-configurable thresholds (e.g., +40°C/–10°C) that persist across power cycles. |
| Thermostat Output Polarity Control | POL bit selects active-high (POL=1) or active-low (POL=0) DQ assertion - matches existing logic-level requirements of downstream comparators or microcontroller interrupt inputs. |
| Nonvolatile Configuration Storage | T/R̄, POL, and 1SHOT bits reside in EEPROM - eliminates boot-time initialization code and ensures consistent behavior across device replacements. |
| Temperature High/Low Flags | THF and TLF bits latch once triggered and retain state in EEPROM - enables post-mortem thermal event logging without continuous polling. |
Applications
| Industrial Motor Overtemperature Protection | Embedded Consumer Appliance Thermostat |
|---|---|
|
Use Scenario: Monitoring stator winding temperature in 3-phase AC motors to prevent insulation failure during overload conditions. IC Role / Device Role / Timing Role: DS1832U/T&R operates in thermostat mode with TH=105°C and TL=95°C, asserting DQ to disable drive stage via optocoupler when threshold exceeded. Use Value: Hardware-level thermal cutoff eliminates software latency risk and removes dependency on MCU availability during fault events. |
Use Scenario: Maintaining setpoint temperature in smart coffee makers using PID-controlled heating elements. IC Role / Device Role / Timing Role: DS1832U/T&R functions in 1-Wire mode, reporting 1°C-resolution temperature every 500 ms to MCU for closed-loop control. Use Value: Single-wire interface simplifies wiring in compact appliance chassis while EEPROM-stored calibration offsets enable unit-to-unit consistency. |
| Automotive Cabin Climate Sensor | Medical Infusion Pump Temperature Monitor |
|
Use Scenario: Measuring ambient cabin air temperature for HVAC blower speed and blend door actuation. IC Role / Device Role / Timing Role: DS1832U/T&R runs in continuous conversion mode (1SHOT=0), updating temperature register every 1 s for real-time feedback. Use Value: Wide –40°C to +85°C operational range covers automotive storage and startup extremes; ±1°C accuracy ensures precise comfort control. |
Use Scenario: Verifying IV bag fluid temperature remains within 35–40°C therapeutic window during infusion. IC Role / Device Role / Timing Role: DS1832U/T&R configured in thermostat mode triggers audible alarm when fluid exceeds TH=40.5°C and resets only after cooling to TL=39.5°C. Use Value: Built-in hysteresis prevents chatter at setpoint; medical-grade accuracy tolerance satisfies IEC 60601-1 thermal monitoring requirements. |
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+T&R | 12-bit resolution (0.0625°C), parasite-power capable, supports multi-drop 1-Wire bus - but lacks standalone thermostat mode and TH/TL EEPROM storage. | Requires continuous MCU supervision for temperature-triggered actions; unsuitable for true autonomous thermal cutoff. | Select DS18B20+T&R only when higher resolution or multi-sensor bus sharing is required, not for hardware thermostat replacement. |
| LMT70YFQR | Analog output (ratiometric voltage), 0.1°C typical accuracy, 2.7V–5.5V supply - no digital interface, no EEPROM, no built-in hysteresis logic. | Needs external ADC, comparator, and latch circuitry to replicate DS1832U/T&R's autonomous thermostat function. | Choose LMT70YFQR only when analog signal chain already exists and board space permits discrete hysteresis implementation. |
Compared with DS18B20+T&R and LMT70YFQR, DS1832U/T&R uniquely integrates EEPROM-programmable trip-points, autonomous thermostat operation, and 1-Wire simplicity - reducing BOM count by eliminating external comparators, latches, and ADCs in thermal protection designs.
Availability
DS1832U/T&R is available at Aetrix Electronics and suitable for industrial motor protection, consumer appliance thermostats, automotive climate control, and medical thermal monitoring requiring stable component supply across long production lifecycles.
Supply support for DS1832U/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) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability interface solutions for industrial, automotive, and medical applications.
The DS1832U/T&R belongs to Maxim's 1-Wire temperature sensor family designed specifically for applications demanding autonomous thermal decision-making with minimal external components and robust operation across extreme temperatures.
FAQ
What is the primary function of the DS1832U/T&R in thermostat mode?
The DS1832U/T&R functions as a fully autonomous digital thermostat in thermostat mode (T/R̄ = 1), performing continuous temperature conversions at power-up and asserting its DQ pin when measured temperature exceeds the TH register value - remaining asserted until temperature falls below the TL register value. This behavior is enabled solely by EEPROM-stored configuration, requiring no host MCU interaction during operation.
Does the DS1832U/T&R require external components for basic operation?
No, the DS1832U/T&R requires no external components for fundamental operation: its 1-Wire interface needs only a single 4.7 kΩ pull-up resistor on the DQ line, and its temperature sensing and thermostat logic are self-contained. No external crystal, ADC, comparator, or memory is needed - all trip-point and configuration data resides in on-chip EEPROM.
How does the DS1832U/T&R achieve ±1°C accuracy over 0°C to +85°C?
The DS1832U/T&R achieves ±1°C accuracy through factory-trimmed oscillator matching and on-chip slope compensation logic that corrects for parabolic oscillator drift across temperature. This calibration is stored in nonvolatile memory and applied automatically during each conversion - no user calibration or software correction is required to meet the ±1°C specification in the 0°C to +85°C range.
Can the DS1832U/T&R operate without a VDD connection?
No, the DS1832U/T&R requires a valid VDD supply between 2.7V and 5.5V for all modes of operation. Unlike some 1-Wire devices (e.g., DS18B20), it does not support parasite-power mode. The VDD pin must be connected to a stable regulated supply; operation with VDD disconnected or below 2.7V will result in undefined behavior or failure to initialize.
What happens to the TH and TL trip-point settings if power is removed from the DS1832U/T&R?
The TH and TL trip-point settings are stored in nonvolatile EEPROM memory inside the DS1832U/T&R, so they persist indefinitely without power. After power cycling, the DS1832U/T&R retains its programmed TH and TL values, along with T/R̄, POL, and 1SHOT bits - ensuring identical thermostat or 1-Wire behavior across all power-on events unless explicitly rewritten.
DS1832U/T&R 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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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/T&R FAQ
1.How can I place an order for DS1832U/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1832U/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 DS1832U/T&R reliable?
The price and inventory of DS1832U/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 DS1832U/T&R is usually 5 days.
3.What payment methods are accepted for DS1832U/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1832U/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1832U/T&R?
DS1832U/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1832U/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 DS1832U/T&R?
For technical support, including DS1832U/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1832U/T&R requirements.
6.How does Aetrix verify that DS1832U/T&R is sourced from the original manufacturer or authorized distributors?
All DS1832U/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 DS1832U/T&R meets industry standards.
7.What is the process for return or replacement of DS1832U/T&R?
All DS1832U/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1832U/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 DS1832U/T&R part is unused and in its original packaging.
Return procedure for DS1832U/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1832U/T&R Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
