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Analog Devices Inc./Maxim Integrated DS1232LPS-2+T&R
- Part No.:
- DS1232LPS-2+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1232LPS-2+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,499
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Product details
Overview
DS1232LPS-2+T&R from Maxim Integrated (acquired by Analog Devices) is a low-power microprocessor supervisory IC that monitors VCC, implements watchdog timer functionality, and manages pushbutton reset with 250 ms minimum active reset pulse width. It features dual RST outputs (active-high and open-drain active-low), 50 µA quiescent current, and supports 5% or 10% VCC tolerance selection via TOL pin. Used in embedded control systems requiring reliable power-up sequencing and software fault recovery.
For engineers reviewing the DS1232LPS-2+T&R datasheet, DS1232LPS-2+T&R pinout, DS1232LPS-2+T&R application, or DS1232LPS-2+T&R equivalent, key selection considerations include VCC trip point accuracy (4.50–4.74 V at TOL=GND), watchdog timeout options (150/600/1200 ms), dual-reset output drive capability, industrial temperature range support, and 8-pin SOIC (150-mil) package compatibility.
Technical Context
The DS1232LPS-2+T&R integrates three independent monitoring functions: precision VCC detection using a temperature-compensated bandgap reference and comparator, debounced pushbutton reset with guaranteed 250 ms active pulse, and a programmable watchdog timer with three timeout settings selected by TD pin state (GND/float/VCC). All functions drive both RST (active-high CMOS) and RST̅ (open-drain active-low) outputs simultaneously.
Its power monitor asserts reset when VCC falls below 4.50 V (TOL=GND) or 4.25 V (TOL=VCC), holding reset active for ≥250 ms after VCC recovery. The watchdog timer restarts on each ST high-to-low transition and times out if unstimulated - ensuring microprocessor execution integrity without software intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point (TOL=GND) | 4.50–4.74 V - defines precise power-fail detection threshold for +5 V systems |
| Quiescent Current | 50 µA - enables battery-backed or ultra-low-power embedded operation |
| Reset Pulse Width | ≥250 ms - ensures full microprocessor initialization and clock stabilization |
| Watchdog Timeout Options | 150 / 600 / 1200 ms - selectable via TD pin to match firmware execution cycles |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded environments |
| Package | 8-pin SOIC (150-mil) - surface-mount compatible with standard PCB assembly |
| RST Output Type | CMOS active-high; RST̅ open-drain active-low - supports mixed-voltage or level-shifted reset signaling |
Pinout & Package
DS1232LPS-2+T&R is housed in an 8-pin SOIC package (150-mil width), pin-compatible with industry-standard 8-pin SOIC footprints. Pin assignments are identical to DS1232LPS 8-pin SOIC variant per Maxim's mechanical drawings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low debounced input; initiates ≥250 ms reset pulse on release |
| TD | Watchdog Timeout Select | GND = ~150 ms, float = ~600 ms, VCC = ~1200 ms timeout |
| TOL | VCC Tolerance Selection | GND = 5% trip (4.50–4.74 V), VCC = 10% trip (4.25–4.49 V) |
| GND | Ground Reference | Return path for all internal comparators, timers, and output drivers |
| RST | Active-High Reset Output | CMOS output; drives high during reset assertion; requires no pull-up |
| RST̅ | Active-Low Open-Drain Reset | Open-drain output; requires external pull-up for logic-level compatibility |
| ST | Watchdog Strobe Input | High-to-low transition resets watchdog timer; must occur before timeout |
| VCC | +5 V Power Supply | Primary supply input; monitored for undervoltage; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous reset outputs | RST (CMOS high-active) and RST̅ (open-drain low-active) enable flexible interface with diverse microcontroller reset inputs |
| Programmable watchdog timeout | Three factory-set intervals (150/600/1200 ms) selected by TD pin voltage - eliminates need for external timing components |
| VCC tolerance selection | 5% or 10% detection window set by single TOL pin connection - simplifies design across varying supply stability requirements |
| Guaranteed reset pulse width | Minimum 250 ms active reset duration on power-up, power-down, and pushbutton events - ensures robust processor initialization |
| Ultra-low quiescent current | 50 µA typical supply current - extends battery life in always-on or backup-powered systems |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Microcontroller-based PLC executes cyclic control logic in factory automation cabinets with fluctuating 5 V rail due to shared power distribution. IC Role / Device Role / Timing Role: DS1232LPS-2+T&R continuously monitors VCC, triggers watchdog reset if firmware hangs, and accepts front-panel reset button press. Use Value: Prevents silent system lockup by forcing hard reset within 1.2 s of missed ST strobe; 4.50 V trip point aligns with IPC-2221 Class 2 supply tolerance. | Use Scenario: Battery-powered infusion pump runs safety-critical dosing algorithms with strict uptime and fail-safe requirements. IC Role / Device Role / Timing Role: DS1232LPS-2+T&R provides power-on reset, detects brownout during battery discharge, and validates CPU liveness via ST signal derived from timer interrupt. Use Value: 50 µA quiescent current minimizes standby drain; dual RST outputs interface directly with MCU reset pin and external alarm latch. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Retail terminal experiences frequent AC power cycling and ESD events on customer-facing buttons. IC Role / Device Role / Timing Role: DS1232LPS-2+T&R debounces PBRST line, asserts reset for ≥250 ms on button press, and monitors 5 V rail for transient dips during peripheral hot-plug. Use Value: Eliminates false resets from contact bounce; 250 ms pulse exceeds Intel® Celeron® reset hold time requirement. | Use Scenario: Utility meter operates unattended for 15+ years with lithium-thionyl chloride backup battery and intermittent RF transmission. IC Role / Device Role / Timing Role: DS1232LPS-2+T&R supervises main 5 V supply, generates watchdog-triggered reset if communication stack stalls, and holds reset during deep-sleep wake-up sequence. Use Value: −40°C to +85°C rating ensures reliability in outdoor enclosures; open-drain RST̅ allows direct connection to RF transceiver enable line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Single active-low reset output; fixed 2.93 V threshold; no watchdog or pushbutton support | Suitable only for basic power-monitoring; lacks DS1232LPS-2+T&R's dual reset, watchdog, and PBRST functions | Select when only undervoltage detection is required and board space is constrained |
| TPS3808G33DBVR | Adjustable reset threshold (0.4–5 V); 200 ms min reset pulse; no pushbutton input or watchdog timer | Requires external RC network for timeout; no built-in debounce or ST strobe interface | Choose for designs needing programmable trip point but not multi-function supervision |
Compared with MAX6326US29D3+T and TPS3808G33DBVR, DS1232LPS-2+T&R uniquely integrates VCC monitoring, pushbutton reset, and programmable watchdog in one 8-pin SOIC - eliminating discrete timing components and reducing BOM count while supporting full-system fault recovery.
Availability
DS1232LPS-2+T&R is available at Aetrix Electronics and suitable for industrial control systems, medical devices, point-of-sale terminals, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for DS1232LPS-2+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
Analog Devices (via acquisition of Maxim Integrated) designs high-performance analog, mixed-signal, and power management ICs for precision sensing, power integrity, and real-time system control.
The DS1232LPS-2+T&R belongs to Maxim's MicroMonitor™ family - engineered specifically for microprocessor-based systems needing integrated power supervision, watchdog safety, and hardware reset management in space-constrained industrial applications.
FAQ
What is the function of the TOL pin on DS1232LPS-2+T&R?
The TOL pin on DS1232LPS-2+T&R selects the VCC detection tolerance: connecting TOL to GND sets a 5% trip point (4.50–4.74 V), while connecting it to VCC sets a 10% trip point (4.25–4.49 V). This allows DS1232LPS-2+T&R to adapt to different power supply stability requirements without changing the part number or layout.
Does DS1232LPS-2+T&R support both active-high and active-low reset signaling?
Yes, DS1232LPS-2+T&R provides two independent reset outputs: RST is a CMOS active-high output, and RST̅ is an open-drain active-low output. This dual-output architecture enables DS1232LPS-2+T&R to interface directly with microcontrollers requiring either polarity, including those with internal pull-ups or level-shifting requirements.
How is the watchdog timeout configured on DS1232LPS-2+T&R?
The watchdog timeout on DS1232LPS-2+T&R is set by the TD pin: grounded TD yields ~150 ms, floating TD yields ~600 ms, and TD tied to VCC yields ~1200 ms. Each timeout begins after RST/RST̅ go inactive, and a high-to-low ST pulse resets the timer - ensuring DS1232LPS-2+T&R enforces firmware liveness without external components.
What is the minimum reset pulse width guaranteed by DS1232LPS-2+T&R?
DS1232LPS-2+T&R guarantees a minimum reset pulse width of 250 ms for all reset sources - including power-up, power-down, pushbutton activation, and watchdog timeout. This duration is specified across temperature and supply voltage and ensures sufficient time for microprocessor clock stabilization and register initialization before code execution resumes.
Is DS1232LPS-2+T&R qualified for industrial temperature operation?
Yes, DS1232LPS-2+T&R is rated for operation from −40°C to +85°C, meeting industrial temperature grade specifications. This rating is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the official datasheet, making DS1232LPS-2+T&R suitable for deployment in harsh environments such as factory floors, outdoor meters, and transportation equipment.
DS1232LPS-2+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.37V, 4.62V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1232LPS-2+T&R FAQ
1.How can I place an order for DS1232LPS-2+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1232LPS-2+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 DS1232LPS-2+T&R reliable?
The price and inventory of DS1232LPS-2+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 DS1232LPS-2+T&R is usually 5 days.
3.What payment methods are accepted for DS1232LPS-2+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1232LPS-2+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1232LPS-2+T&R?
DS1232LPS-2+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1232LPS-2+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 DS1232LPS-2+T&R?
For technical support, including DS1232LPS-2+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1232LPS-2+T&R requirements.
6.How does Aetrix verify that DS1232LPS-2+T&R is sourced from the original manufacturer or authorized distributors?
All DS1232LPS-2+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 DS1232LPS-2+T&R meets industry standards.
7.What is the process for return or replacement of DS1232LPS-2+T&R?
All DS1232LPS-2+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1232LPS-2+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 DS1232LPS-2+T&R part is unused and in its original packaging.
Return procedure for DS1232LPS-2+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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