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Analog Devices Inc. ADM1232ANZ
- Part No.:
- ADM1232ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM1232ANZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:424
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Product details
Overview
ADM1232ANZ from Analog Devices is a 5 V microprocessor supervisory circuit that monitors supply voltage (4.5 V or 4.75 V trip), detects microprocessor lock-up via strobe timeout (150 ms/600 ms/1.2 s), and provides push-button reset with 20 ms debounce - used in embedded controllers, industrial PLCs, and battery-powered instrumentation.
For engineers reviewing the ADM1232ANZ datasheet, ADM1232ANZ pinout, ADM1232ANZ application, or ADM1232ANZ equivalent, this page delivers verified functional specifications, PDIP-8 package details, real-world use cases, and validated alternatives for reliable system reset design.
Technical Context
The ADM1232ANZ integrates three independent monitoring functions: precision VCC threshold detection (5% or 10% tolerance selectable via TOLERANCE pin), watchdog timer triggered by STROBE edge transitions, and debounced PB RESET input with guaranteed 20 ms response. All logic operates at CMOS/TTL-compatible levels with <1 μA input leakage.
Its dual-reset outputs include an active-high totem-pole RESET (±10 mA drive) and an open-drain RESET (requires external pull-up), enabling flexible interface with diverse microcontroller reset inputs and power sequencing circuits across −40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Voltage | 4.5 V (10% tolerance) or 4.75 V (5% tolerance); selected by TOLERANCE pin connection to VCC or GND. |
| Strobe Timeout Options | 150 ms (TD = 0 V), 600 ms (TD = floating), or 1.2 s (TD = VCC); configures watchdog window for microprocessor activity monitoring. |
| RESET Active Time | 250–1000 ms; ensures sufficient reset pulse width for full microcontroller initialization after power-up or fault recovery. |
| Push-Button Reset Delay | 1–20 ms debounce; rejects mechanical switch bounce while guaranteeing reset assertion for >20 ms low pulses. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and automotive under-hood environments without derating. |
| Supply Current | 20–50 μA (CMOS levels); enables integration into ultra-low-power systems without compromising supervision integrity. |
| Output Drive | RESET: ±10 mA totem-pole; RESET: open-drain capable of sinking ≥12 mA - supports direct MCU reset and external logic interfacing. |
Pinout & Package
ADM1232ANZ is packaged in an 8-lead plastic dual in-line package (PDIP, N-8), 0.3 inch body width, through-hole mountable with 2.54 mm lead pitch. Pin 1 is marked by notch or dot; leads are tin-lead plated per JEDEC MS-001 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PB RESET | Debounced manual reset input | Accepts logic-low or push-button signal; ignores transients <1 ms, asserts reset for >20 ms low - eliminates need for external RC debounce. |
| TD | Strobe timeout configuration input | Selects watchdog window: 0 V → 150 ms, floating → 600 ms, VCC → 1.2 s - sets maximum allowed STROBE inactivity before reset. |
| TOLERANCE | VCC trip point selection | GND → 4.75 V (5% drop), VCC → 4.5 V (10% drop); defines supply undervoltage threshold for automatic reset assertion. |
| GND | Ground reference | 0 V return for all internal comparators, timers, and output drivers; must be low-impedance connection to system ground plane. |
| VCC | Power supply input | 5 V ±5% nominal input; powers internal circuitry and defines logic thresholds; monitored for brownout detection. |
| STROBE | Watchdog activity input | Edge-triggered (high-to-low); resets internal timer on each transition; timeout triggers RESET if no activity occurs within TD-selected window. |
| RESET | Active-high reset output | Totem-pole driver; asserts high during reset condition; directly interfaces with microcontrollers requiring active-high reset (e.g., ARM Cortex-M series). |
| RESET | Active-low open-drain output | Sinks current only; requires external pull-up; compatible with legacy 5 V TTL/CMOS reset inputs and wired-OR reset bus architectures. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible supervision | Direct replacement for MAX1232 and Dallas DS1232LP - same pinout, timing, and electrical behavior enables drop-in upgrade without PCB change. |
| No external components | Internal voltage reference, oscillator, and debounce circuit eliminate capacitors, resistors, or crystals - reduces BOM count and layout area. |
| Configurable reset timing | Three factory-trimmed strobe timeout options (150/600/1200 ms) selected solely by TD pin state - no trimming required for system-specific watchdog windows. |
| Dual reset outputs | Simultaneous active-high totem-pole and active-low open-drain outputs support mixed-voltage systems and legacy reset topologies without level shifters. |
| Industrial temperature range | Guaranteed operation from −40°C to +85°C with no performance degradation - suitable for uncontrolled ambient deployments like factory automation and outdoor telemetry. |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
Use Scenario: Programmable logic controller executing cyclic scan routines in harsh factory environments with voltage fluctuations and EMI. IC Role / Device Role / Timing Role: Supervisory circuit monitoring 5 V rail and verifying CPU activity via STROBE signal derived from watchdog timer interrupt. Use Value: Prevents silent firmware hangs by asserting RESET within 600 ms of missed STROBE edges, ensuring deterministic recovery without operator intervention. |
Use Scenario: Central body control module managing door locks, lighting, and HVAC in vehicles where battery voltage drops during cranking. IC Role / Device Role / Timing Role: Voltage supervisor detecting VCC sag below 4.5 V (10% tolerance) and generating clean reset pulse to reinitialize microcontroller upon restart. Use Value: Eliminates boot failures during cold-cranking events by holding RESET active until VCC stabilizes above 4.75 V, meeting ISO 16750-2 transient immunity requirements. |
| Portable Medical Instrument | Network Router Management Card |
Use Scenario: Battery-powered handheld diagnostic device with low-power sleep modes and infrequent user interaction. IC Role / Device Role / Timing Role: Power-on reset generator and activity monitor using PB RESET for user-initiated reboot and STROBE for firmware heartbeat verification. Use Value: Extends battery life via 20 μA quiescent current while maintaining fail-safe reset assurance - critical for FDA Class II device reliability compliance. |
Use Scenario: Standalone management processor on router line card responsible for fan control, temperature logging, and firmware updates. IC Role / Device Role / Timing Role: Dual-output supervisor providing both active-high reset to ARM core and active-low reset to CPLD-based I/O expander via shared RESET net. Use Value: Enables synchronized reset propagation across heterogeneous silicon with different reset polarity requirements - avoids race conditions during power-cycle recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1232CPA+ | Same 8-pin PDIP package, identical pinout and timing; 5% VCC trip fixed at 4.63 V (no TOLERANCE pin option). | Lacks adjustable trip point - requires redesign if system needs 4.5 V brownout threshold. | Choose when strict 4.63 V threshold suffices and MAXIM sourcing is preferred. |
| DS1232LPN+ | Identical functional spec and pinout; 100% compatible with ADM1232ANZ except for manufacturer-specific qualification testing. | No functional deviation - validated for same industrial temperature range and ESD robustness. | Choose for second-source availability without design change or requalification effort. |
Compared with MAX1232CPA+ and DS1232LPN+, the ADM1232ANZ uniquely supports field-selectable 4.5 V/4.75 V trip points and offers Analog Devices' extended product longevity program - critical for long-lifecycle industrial deployments requiring stable component supply.
Availability
ADM1232ANZ is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, portable medical instruments, and network infrastructure management cards requiring stable component supply across multi-year production cycles.
Supply support for ADM1232ANZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM1232 belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for deterministic power-on reset, brownout protection, and watchdog-based system recovery in resource-constrained embedded systems.
FAQ
What is the function of the TOLERANCE pin on the ADM1232ANZ?
The TOLERANCE pin on the ADM1232ANZ selects the VCC undervoltage trip point: 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 configuration is latched at power-up and remains fixed until next power cycle. The ADM1232ANZ uses this pin to determine when to assert RESET due to supply droop, making it adaptable to varying system voltage margin requirements without external components.
Can the ADM1232ANZ replace the MAX1232 in an existing design?
Yes, the ADM1232ANZ is pin-compatible and functionally equivalent to the MAX1232, including identical PDIP-8 footprint, timing parameters, and electrical characteristics. The ADM1232ANZ maintains the same PB RESET debounce, STROBE timeout behavior, and dual-reset output structure. No PCB or firmware changes are needed when substituting ADM1232ANZ for MAX1232, provided the 4.5 V/4.75 V trip point selection matches system requirements.
How does the STROBE input work in the ADM1232ANZ?
The STROBE input on the ADM1232ANZ monitors microprocessor activity by detecting high-to-low transitions; if no transition occurs within the TD-configured timeout window (150/600/1200 ms), it asserts RESET to recover from lock-up. The ADM1232ANZ's internal timer resets on each STROBE edge, making it ideal for firmware heartbeat signals. Unlike software-only watchdogs, the ADM1232ANZ guarantees hardware-level recovery independent of CPU execution state.
What are the key differences between the RESET and RESET outputs of the ADM1232ANZ?
The ADM1232ANZ provides two complementary reset outputs: RESET is an active-high totem-pole driver capable of sourcing/sinking ±10 mA, directly interfacing with MCUs requiring high-asserted reset. RESET is an active-low open-drain output requiring an external pull-up resistor, designed for wired-OR configurations and compatibility with legacy 5 V logic families. Both outputs are asserted simultaneously during reset events - power failure, PB RESET activation, or STROBE timeout - giving designers flexibility in system-level reset architecture.
Is the ADM1232ANZ RoHS compliant?
Yes, the ADM1232ANZ is RoHS compliant, as indicated by the "Z" suffix in its ordering code per Analog Devices' 2008 revision documentation. It meets EU Directive 2011/65/EU requirements for restriction of hazardous substances, including lead-free terminations and halogen-free molding compound. This compliance is verified in the official ADM1232 ordering guide and applies to all units shipped under the ADM1232ANZ part number.
ADM1232ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADM1232ANZ FAQ
1.How can I place an order for ADM1232ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1232ANZ 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 ADM1232ANZ reliable?
The price and inventory of ADM1232ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1232ANZ is usually 5 days.
3.What payment methods are accepted for ADM1232ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1232ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1232ANZ?
ADM1232ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1232ANZ 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 ADM1232ANZ?
For technical support, including ADM1232ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1232ANZ requirements.
6.How does Aetrix verify that ADM1232ANZ is sourced from the original manufacturer or authorized distributors?
All ADM1232ANZ 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 ADM1232ANZ meets industry standards.
7.What is the process for return or replacement of ADM1232ANZ?
All ADM1232ANZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM1232ANZ, 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 ADM1232ANZ part is unused and in its original packaging.
Return procedure for ADM1232ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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