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Analog Devices Inc. ADM1232ARMZ
- Part No.:
- ADM1232ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADM1232ARMZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:165
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Product details
Overview
ADM1232ARMZ from Analog Devices is a 5 V microprocessor supervisory circuit in an 8-lead MSOP package, featuring adjustable voltage monitoring (4.5 V or 4.75 V trip), programmable strobe timeout (150 ms/600 ms/1.2 s), push-button reset with 20 ms debounce, open-drain RESET and active-high RESET outputs, and operation from −40°C to +85°C. It monitors supply voltage integrity, detects microprocessor lockup via STROBE activity, and supports manual reset in embedded controllers.
For engineers reviewing the ADM1232ARMZ datasheet, ADM1232ARMZ pinout, ADM1232ARMZ application, or ADM1232ARMZ equivalent, this page delivers verified specifications, functional context for power-on reset and watchdog timing design, package-specific terminal mapping, and validated alternative options for system-level reliability engineering.
Technical Context
The ADM1232ARMZ integrates a precision voltage monitor, a programmable watchdog timer triggered by STROBE transitions, and a debounced push-button input. Its TOLERANCE pin selects between 5% (4.75 V) and 10% (4.5 V) VCC trip thresholds, while TD pin configures strobe timeout periods across three discrete ranges (150 ms, 600 ms, or 1.2 s) based on voltage state.
It provides dual reset outputs: RESET (active-high, push-pull capable of sourcing/sinking 8–10 mA) and RESET (open-drain, requiring external pull-up). The device asserts reset during power-up, VCC undervoltage, PB RESET activation, or STROBE inactivity beyond the selected timeout - all without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Voltage | 4.5 V (10% tolerance) or 4.75 V (5% tolerance); sets precise power-fail detection threshold for 5 V systems. |
| Strobe Timeout | 150 ms / 600 ms / 1.2 s; selectable via TD pin voltage to match MCU instruction cycle or task timing. |
| Reset Active Time | 250–1000 ms; ensures reliable processor initialization after power-up or fault recovery. |
| Push-Button Debounce | 20 ms minimum low pulse required; eliminates mechanical switch bounce in manual reset circuits. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and automotive control environments. |
| Supply Current | 20–50 μA (CMOS levels); ultra-low quiescent draw for battery-backed or portable applications. |
| RESET Output Drive | 8–10 mA sink/source; directly drives logic inputs or small LEDs without buffering. |
Pinout & Package
ADM1232ARMZ is housed in an 8-lead Mini Small Outline Package (MSOP, RM-8), 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PB RESET | Debounced manual reset input | Accepts logic-low or push-button signal; guarantees reset assertion only after ≥20 ms low pulse. |
| TD | Strobe timeout configuration | Selects timeout period: 0 V → 150 ms, floating → 600 ms, VCC → 1.2 s. |
| TOLERANCE | Voltage monitor threshold select | GND → 5% trip (4.75 V), VCC → 10% trip (4.5 V). |
| GND | Ground reference | 0 V return for all internal comparators, timers, and output drivers. |
| VCC | Power supply input | 5 V ±10% nominal supply; powers internal circuitry and defines logic thresholds. |
| STROBE | Watchdog activity monitor | Edge-sensitive input; reset asserted if no high-to-low transition occurs within selected timeout. |
| RESET | Active-high reset output | Push-pull driver; asserts high during reset condition; sinks/sours up to 10 mA. |
| RESET | Active-low open-drain output | Requires external pull-up; used for wired-OR reset buses or level-shifting interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible supervision | Direct replacement for MAX1232 and DS1232LP, enabling drop-in upgrade in legacy designs. |
| No external components | Integrates voltage reference, timer, debounce, and dual reset drivers - eliminates BOM cost and layout area. |
| Configurable reset timing | Three factory-trimmed strobe timeout options allow matching to diverse MCU firmware execution windows. |
| Dual reset signaling | Simultaneous active-high and active-low outputs support mixed-logic systems and legacy interface requirements. |
| Industrial temperature range | Guaranteed operation from −40°C to +85°C supports deployment in harsh environmental conditions. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring microcontroller health in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, VCC brownout detection, and software watchdog via STROBE monitoring. Use Value: Prevents erratic behavior during line transients or thermal stress by asserting reset before MCU executes corrupted code. | Use Scenario: Ensuring safe startup and runtime integrity of microcontrollers managing door locks, lighting, and HVAC in vehicles. IC Role / Device Role / Timing Role: Voltage supervisor and hardware watchdog enforcing deterministic reset on supply dip or firmware hang. Use Value: Meets ISO 16750-2 pulse test requirements with 4.5 V trip point and 250–1000 ms reset hold time. |
| Medical Diagnostic Handhelds | Network Edge Routers |
Use Scenario: Power management in portable ultrasound or glucose meter devices with battery-backed operation. IC Role / Device Role / Timing Role: Low-current (20 μA) supervisor enabling long standby life while guaranteeing clean boot on wake-up. Use Value: 50 μA max supply current extends battery life; PB RESET supports user-initiated recalibration resets. | Use Scenario: Ensuring robust boot sequence and runtime stability of network processors in enterprise routers. IC Role / Device Role / Timing Role: Dual-output reset generator coordinating CPU, PHY, and memory initialization timing. Use Value: RESET and RESET outputs drive separate reset domains; strobe timeout prevents false resets during packet burst processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1232ESA+ | Same 8-pin SOIC package; identical pinout and core functions; 5% tolerance fixed at 4.75 V (no TOLERANCE pin option). | Lacks configurable trip voltage; requires redesign if 4.5 V threshold needed. | Choose when footprint compatibility and fixed 4.75 V trip suffice; verify TD/strobe timing matches. |
| DS1232LPZ+ | 8-pin SOIC; supports same strobe timeout selection but uses different TD biasing scheme; 10% trip fixed at 4.5 V. | No TOLERANCE pin - cannot switch between 4.5 V and 4.75 V thresholds. | Prefer for legacy Dallas-based designs where 4.5 V trip and existing TD routing are confirmed. |
Compared with MAX1232ESA+ and DS1232LPZ+, the ADM1232ARMZ offers unique flexibility in VCC trip selection and consistent MSOP packaging, making it optimal for new designs requiring both voltage threshold adaptability and space-constrained layouts.
Availability
ADM1232ARMZ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical handheld equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM1232ARMZ 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM1232 belongs to Analog Devices' microprocessor supervisory product line, designed specifically to ensure reliable power-on sequencing, voltage monitoring, and hardware-based watchdog functionality in resource-constrained embedded systems.
FAQ
What is the function of the TOLERANCE pin on the ADM1232ARMZ?
The TOLERANCE pin on the ADM1232ARMZ selects the VCC undervoltage trip threshold: connecting it to GND sets a 5% tolerance (4.75 V trip), while connecting it to VCC sets a 10% tolerance (4.5 V trip). This allows system designers to precisely match the ADM1232ARMZ's reset behavior to the target microprocessor's supply specification without external resistors or trimming.
How does the STROBE input work in the ADM1232ARMZ?
The STROBE input in the ADM1232ARMZ monitors microprocessor activity by detecting high-to-low transitions. If no transition occurs within the timeout period set by the TD pin (150 ms, 600 ms, or 1.2 s), the ADM1232ARMZ asserts RESET to recover from potential lockup. This hardware watchdog operates independently of software, ensuring fail-safe behavior even if firmware hangs.
What is the difference between the RESET and RESET outputs of the ADM1232ARMZ?
The RESET output of the ADM1232ARMZ is active-high and push-pull, capable of sourcing and sinking up to 10 mA. The RESET output is active-low and open-drain, requiring an external pull-up resistor. This dual-output architecture enables the ADM1232ARMZ to interface with both TTL/CMOS logic families and wired-OR reset buses commonly found in multi-processor systems.
Can the ADM1232ARMZ be used in battery-powered applications?
Yes, the ADM1232ARMZ draws only 20–50 μA typical supply current (CMOS logic levels), making it well-suited for battery-powered applications such as portable medical devices or handheld test equipment. Its −40°C to +85°C operating range and low-voltage reset accuracy further support reliable operation in variable-power environments.
Is the ADM1232ARMZ pin-compatible with other supervisory ICs?
Yes, the ADM1232ARMZ is explicitly pin-compatible with the MAX1232 and Dallas DS1232LP, sharing identical pin assignments and core functionality in its 8-lead MSOP package. This enables direct substitution in existing designs using those parts, provided the TOLERANCE and TD configuration requirements are met.
ADM1232ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- Adjustable/Selectable
- Output:
- Open Drain, 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-MSOP
ADM1232ARMZ FAQ
1.How can I place an order for ADM1232ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1232ARMZ 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 ADM1232ARMZ reliable?
The price and inventory of ADM1232ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1232ARMZ is usually 5 days.
3.What payment methods are accepted for ADM1232ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1232ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1232ARMZ?
ADM1232ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1232ARMZ 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 ADM1232ARMZ?
For technical support, including ADM1232ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1232ARMZ requirements.
6.How does Aetrix verify that ADM1232ARMZ is sourced from the original manufacturer or authorized distributors?
All ADM1232ARMZ 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 ADM1232ARMZ meets industry standards.
7.What is the process for return or replacement of ADM1232ARMZ?
All ADM1232ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM1232ARMZ, 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 ADM1232ARMZ part is unused and in its original packaging.
Return procedure for ADM1232ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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