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Analog Devices Inc. ADM1232ARNZ-REEL
- Part No.:
- ADM1232ARNZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM1232ARNZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
ADM1232ARNZ-REEL from Analog Devices is a 5 V microprocessor supervisory circuit in an 8-lead narrow SOIC (R-8) 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 safeguards embedded systems during power-up, brownout, and software lockup events.
For engineers reviewing the ADM1232ARNZ-REEL datasheet, ADM1232ARNZ-REEL pinout, ADM1232ARNZ-REEL application, or ADM1232ARNZ-REEL equivalent, key selection criteria include VCC trip point tolerance selection (5% or 10%), STROBE timeout configuration via TD pin, dual-reset output topology (push-pull vs. open-drain), supply current (<50 μA at CMOS levels), and RoHS-compliant R-8 packaging for space-constrained industrial control boards.
Technical Context
The ADM1232ARNZ-REEL integrates three independent supervision functions: precision VCC threshold detection with selectable 5% or 10% tolerance, watchdog-style STROBE activity monitoring with TD-configurable timeout periods, and debounced manual reset via PB RESET. Its internal reset generator asserts both RESET (active-high, push-pull) and RESET (active-low, open-drain) simultaneously upon any fault condition.
It operates without external components, uses internal reference and timing circuits, and guarantees reset assertion within 50 μs of VCC falling below the trip point. The device's dual-output architecture supports direct interfacing with both microcontroller reset inputs requiring active-high or active-low logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.5 V (10% tolerance, TOLERANCE = VCC) or 4.75 V (5% tolerance, TOLERANCE = GND) - sets precise brownout detection threshold for 5 V systems. |
| STROBE Timeout | 150 ms (TD = 0 V), 600 ms (TD = floating), or 1.2 s (TD = VCC) - configurable watchdog window for microprocessor activity monitoring. |
| RESET Active Time | 250–1000 ms - guaranteed minimum reset pulse width ensures reliable microcontroller initialization after fault recovery. |
| Supply Current | 20–50 μA at CMOS input levels - ultra-low quiescent current enables use in battery-backed or portable applications. |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade reliability in harsh ambient environments. |
| Reset Outputs | RESET (push-pull, 8–10 mA sink/source), RESET (open-drain, −8 to −12 mA sink) - supports mixed-signaling microcontrollers and I²C-compatible reset lines. |
| Input Leakage | ±1.0 μA on STROBE/TOLERANCE - negligible loading on upstream signal sources or voltage dividers. |
Pinout & Package
ADM1232ARNZ-REEL is housed in an 8-lead narrow SOIC (R-8) package per JEDEC MS-012-AA, with 1.27 mm pitch, 5.00 mm × 4.00 mm body, and RoHS-compliant lead finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | PB RESET | Debounced active-low manual reset input; requires ≥20 ms low pulse to guarantee reset assertion; immune to <1 ms glitches. |
| 2 | TD | Time delay select input; configures STROBE timeout period (0 V = 150 ms, floating = 600 ms, VCC = 1.2 s). |
| 3 | TOLERANCE | Voltage tolerance select; GND = 5% (4.75 V trip), VCC = 10% (4.5 V trip) - sets VCC undervoltage detection threshold. |
| 4 | GND | 0 V reference for all analog and digital circuitry; must be connected to system ground plane. |
| 5 | RESET | Active-high push-pull reset output; drives high/low directly without pull-up; sinks/sources up to 10 mA. |
| 6 | RESET | Active-low open-drain reset output; requires external pull-up resistor; compatible with mixed-voltage or wired-OR reset buses. |
| 7 | STROBE | Watchdog input; monitors high-to-low transitions; reset asserted if no edge occurs within TD-configured timeout window. |
| 8 | VCC | 5 V power supply input; powers internal reference, timer, and output drivers; operates over 4.5–5.5 V range. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable VCC monitor | Selectable 4.5 V or 4.75 V trip point via single TOLERANCE pin connection - eliminates need for external resistive divider. |
| Configurable watchdog timeout | Three discrete STROBE timeout options (150/600/1200 ms) set by TD pin voltage - supports diverse firmware execution cycles without re-spinning PCB. |
| Dual reset outputs | Simultaneous active-high (push-pull) and active-low (open-drain) outputs - interfaces natively with ARM, PIC, and legacy 8051 reset architectures. |
| No external components | Self-contained voltage reference, oscillator, and debounce logic - reduces BOM count and layout area in compact designs. |
| Industrial temperature range | −40°C to +85°C operation - validated for deployment in motor drives, PLCs, and outdoor instrumentation without derating. |
Applications
| Industrial PLCs | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Supervises main 5 V rail and monitors CPU watchdog signal in programmable logic controllers exposed to electrical noise and thermal cycling. IC Role / Device Role / Timing Role: Voltage supervisor and hardware watchdog - detects brownout, software hang, and manual reset requests. Use Value: Prevents corrupted I/O state during power transients by asserting synchronized RESET/RESET pulses with guaranteed 250+ ms duration. |
Use Scenario: Ensures fail-safe boot sequence and runtime integrity in portable ultrasound and patient monitor units with battery backup. IC Role / Device Role / Timing Role: Power-on reset generator and activity monitor - validates microcontroller responsiveness during critical diagnostic routines. Use Value: Ultra-low 50 μA supply current extends battery life; dual outputs interface directly with both FPGA configuration logic and MCU reset pins. |
| Automotive Body Control Modules | Networked Industrial Sensors |
|
Use Scenario: Monitors 5 V supply and microcontroller health in non-safety-critical automotive ECUs operating across wide temperature ranges. IC Role / Device Role / Timing Role: Brownout detector and watchdog timer - triggers reset if CAN communication stalls or supply dips below 4.5 V. Use Value: 10% VCC tolerance mode (4.5 V trip) aligns with automotive cold-crank voltage profiles; TD pin enables tuning to ECU firmware loop time. |
Use Scenario: Provides robust reset management for Modbus RTU or RS-485 sensor nodes deployed in factory-floor environments with EMI and voltage ripple. IC Role / Device Role / Timing Role: System-level reset coordinator - combines power monitoring, manual reset, and watchdog into single footprint. Use Value: Open-drain RESET supports wired-OR bus topology across multiple sensor nodes; R-8 package fits dense 2-layer PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1232ESA+ | Pin-compatible but uses different internal reference; 4.63 V fixed trip (no tolerance select); 16-pin SOIC package. | Lacks adjustable VCC threshold and TD-configurable watchdog - suitable only where fixed 4.63 V trip and 1.6 s timeout suffice. | Choose MAX1232ESA+ only when redesigning for fixed-threshold supervision and board space allows 16-pin SOIC. |
| DS1232L-5+ | 5 V fixed-trip (4.63 V), no TD pin - watchdog timeout fixed at 1.6 s; 8-pin SOIC package; higher 100 μA supply current. | No VCC tolerance or STROBE timeout adjustment - limits flexibility in firmware timing or input voltage variation requirements. | Prefer DS1232L-5+ only for legacy drop-in replacement where existing design already uses fixed 4.63 V trip and 1.6 s watchdog. |
Compared with MAX1232ESA+ and DS1232L-5+, the ADM1232ARNZ-REEL provides unique configurability via TOLERANCE and TD pins, lower supply current, and RoHS-compliant R-8 packaging - making it optimal for new designs requiring adaptability across voltage margins and firmware cycle times.
Availability
ADM1232ARNZ-REEL is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, automotive body control modules, networked industrial sensors, and portable instrumentation requiring stable component supply and long-term manufacturability.
Supply support for ADM1232ARNZ-REEL 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, communications, automotive, and healthcare markets.
The ADM1232 belongs to Analog Devices' microprocessor supervisory product line, designed specifically to replace discrete reset ICs and RC networks in 5 V embedded systems requiring reliable, low-power, and configurable power-on and brownout protection.
FAQ
What is the function of the TD pin on the ADM1232ARNZ-REEL?
The TD pin on the ADM1232ARNZ-REEL selects the STROBE watchdog timeout period: 0 V configures 150 ms, floating configures 600 ms, and VCC configures 1.2 s. This allows firmware timing alignment without external components. The ADM1232ARNZ-REEL uses this pin to determine how long the microprocessor has to assert a STROBE edge before triggering a hardware reset.
Does the ADM1232ARNZ-REEL support both 4.5 V and 4.75 V VCC trip points?
Yes - the ADM1232ARNZ-REEL supports two precise VCC trip points via the TOLERANCE pin: connecting TOLERANCE to VCC selects a 10% tolerance (4.5 V trip), while connecting it to GND selects a 5% tolerance (4.75 V trip). This dual-threshold capability is confirmed in Table 1 and Figure 7 of the ADM1232ARNZ-REEL datasheet Rev. C.
What are the key differences between the RESET and RESET outputs of the ADM1232ARNZ-REEL?
The ADM1232ARNZ-REEL provides RESET (active-high, push-pull) capable of sourcing/sinking up to 10 mA, and RESET (active-low, open-drain) requiring an external pull-up and sinking up to 12 mA. This dual-output structure allows direct compatibility with microcontrollers needing either polarity, and enables wired-OR reset bus configurations. Both outputs assert simultaneously during any fault event.
Is the ADM1232ARNZ-REEL RoHS compliant?
Yes - the "Z" suffix in ADM1232ARNZ-REEL explicitly denotes RoHS compliance per the Ordering Guide on page 9 of the datasheet Rev. C. It uses lead-free terminations and meets EU Directive 2011/65/EU requirements, making it suitable for environmentally regulated industrial and medical end equipment.
Can the ADM1232ARNZ-REEL operate without external capacitors or resistors?
Yes - the ADM1232ARNZ-REEL requires no external components for core supervision functions. Its internal voltage reference, oscillator, and debounce circuit eliminate the need for external RC networks or precision dividers. This is confirmed in the FEATURES section and Figure 2 (Typical Supply Monitoring Application), which shows zero external parts connected to the ADM1232ARNZ-REEL.
ADM1232ARNZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 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-SOIC
ADM1232ARNZ-REEL FAQ
1.How can I place an order for ADM1232ARNZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1232ARNZ-REEL 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 ADM1232ARNZ-REEL reliable?
The price and inventory of ADM1232ARNZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1232ARNZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1232ARNZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1232ARNZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1232ARNZ-REEL?
ADM1232ARNZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1232ARNZ-REEL 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 ADM1232ARNZ-REEL?
For technical support, including ADM1232ARNZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1232ARNZ-REEL requirements.
6.How does Aetrix verify that ADM1232ARNZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1232ARNZ-REEL 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 ADM1232ARNZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1232ARNZ-REEL?
All ADM1232ARNZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1232ARNZ-REEL, 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 ADM1232ARNZ-REEL part is unused and in its original packaging.
Return procedure for ADM1232ARNZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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