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Analog Devices Inc. ADM1232AARNZ-REEL
- Part No.:
- ADM1232AARNZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM1232AARNZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
ADM1232AARNZ-REEL from Analog Devices is a microprocessor supervisory circuit that monitors +5 V supply voltage, detects microprocessor lockup via STROBE input (20 ns pulse width), and provides dual reset outputs (active-high RESET and open-drain active-low RESET) with 250–1000 ms active time. It supports 5% or 10% VCC trip tolerance and operates from −40°C to +85°C in embedded control systems.
For engineers reviewing the ADM1232AARNZ-REEL datasheet, ADM1232AARNZ-REEL pinout, ADM1232AARNZ-REEL application, or ADM1232AARNZ-REEL equivalent, key selection criteria include VCC trip accuracy (±5% or ±10%), STROBE timeout configurability (150/600/1200 ms), push-button reset debounce (20 ms min hold), dual-reset polarity support, and SOIC_N-8 package compatibility for space-constrained industrial PCBs.
Technical Context
The ADM1232AARNZ-REEL integrates a precision voltage monitor, programmable watchdog timer (via TD pin), and debounced manual reset input (PB RESET). Its STROBE input accepts high-to-low transitions as narrow as 20 ns, enabling compatibility with high-speed microprocessors operating above 50 MHz.
It features two independent reset outputs: RESET (push-pull, active-high) capable of sourcing/sinking up to 10 mA, and RESET (open-drain, active-low) requiring external pull-up. Trip point selection (4.5–4.74 V) is set by TOLERANCE pin logic level (GND = 5%, VCC = 10%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Voltage | 4.62 V (5% tol., TOLERANCE = GND) or 4.37 V (10% tol., TOLERANCE = VCC) - defines precise brownout detection threshold for +5 V rail |
| STROBE Pulse Width | 20 ns minimum - ensures reliable detection of fast microprocessor activity signals without missing pulses |
| STROBE Timeout Period | 150 ms (TD = 0 V), 600 ms (TD = floating), or 1200 ms (TD = VCC) - configurable watchdog window for system health monitoring |
| RESET Active Time | 250–1000 ms - guarantees sufficient reset assertion duration for full microprocessor initialization |
| Supply Current | 20–50 μA (CMOS-level inputs) - enables low-power operation in battery-backed or portable systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
| Package | 8-Lead SOIC_N (R-8, JEDEC MS-012-AA) - surface-mount compatible with standard reflow profiles and automated assembly |
Pinout & Package
ADM1232AARNZ-REEL is housed in an 8-lead narrow-body SOIC (SOIC_N) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 × 4.00 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PB RESET | Debounced manual reset input | Accepts push-button or logic-low signal; guaranteed response to ≥20 ms low pulse, immune to <1 ms glitches |
| TD | Strobe timeout configuration | Selects watchdog window: 0 V → 150 ms, floating → 600 ms, VCC → 1200 ms |
| TOLERANCE | Voltage trip point selector | GND → 5% tolerance (4.62 V), VCC → 10% tolerance (4.37 V) |
| GND | Ground reference | 0 V return for all internal circuitry and I/O pins |
| RESET | Active-high reset output | Push-pull driver; sources/sinks up to 10 mA; asserts during power-up, brownout, or STROBE timeout |
| RESET | Active-low open-drain reset output | Requires external pull-up; sinks up to 12 mA; complements RESET for mixed-logic interface needs |
| STROBE | Microprocessor activity monitor input | Detects high-to-low transitions; triggers reset if no edge occurs within selected TD timeout period |
| VCC | +5 V power supply input | Operates from 4.5 V to 5.5 V; internally powers all monitoring functions and outputs |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable STROBE timeout | Three user-selectable windows (150/600/1200 ms) via single TD pin - eliminates need for external RC timing components |
| 5% or 10% VCC tolerance | Hardware-selectable trip point using TOLERANCE pin - avoids firmware configuration and improves boot reliability |
| 20 ns STROBE pulse detection | Supports microprocessors with >50 MHz clock rates and short instruction-cycle watchdog strobes |
| Dual complementary reset outputs | RESET (push-pull, active-high) and RESET (open-drain, active-low) - enables direct interface to diverse MCU reset architectures |
| Integrated PB RESET debounce | On-chip 20 ms minimum hold-time requirement and <1 ms glitch rejection - removes need for external RC filter or Schmitt trigger |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Microcontroller-based PLCs deployed in factory automation require fail-safe reset during voltage sags or software hangs. IC Role / Device Role / Timing Role: Supervisory circuit providing brownout detection, manual reset, and watchdog timeout on STROBE line tied to MCU timer interrupt. Use Value: Ensures deterministic recovery from undervoltage or lockup without external timing components, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Body control units managing door locks, lighting, and HVAC must maintain functional safety during battery voltage fluctuations. IC Role / Device Role / Timing Role: Dual-output reset generator asserting both active-high and active-low reset signals to legacy and modern MCUs in same module. Use Value: Supports mixed-vendor MCU designs while delivering 1200 ms watchdog window (TD = VCC) for complex startup sequences. |
| Portable Medical Instruments | Network Edge Routers |
|
Use Scenario: Battery-powered handheld diagnostics devices demand ultra-low quiescent current and reliable power-on reset. IC Role / Device Role / Timing Role: Low-power (20 μA) supervisory IC monitoring regulated +5 V rail and generating clean POR signal with 250 ms minimum assertion. Use Value: Extends battery life while guaranteeing full microcontroller initialization before sensor sampling begins. |
Use Scenario: Carrier-grade routers use multiple synchronized processors; failure of any core must trigger system-wide reset. IC Role / Device Role / Timing Role: STROBE input monitored across shared bus activity; timeout forces hardware reset if arbitration or DMA stalls occur. Use Value: Prevents silent data corruption by detecting stalled bus masters with 20 ns pulse sensitivity and 600 ms timeout (TD = floating). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1232CSA+ | Same pinout, identical STROBE timeout options, but higher quiescent current (100 μA vs. 50 μA max) and no 20 ns pulse spec confirmed | Valid for cost-sensitive industrial designs where 50 μA savings is non-critical and MAXIM's long-term availability is preferred | Select when sourcing from Maxim Integrated distributors and board layout reuse is mandatory |
| DS1232L+T&R | Identical functional block diagram and pinout; specifies 25 ns minimum STROBE pulse (vs. 20 ns for ADM1232AARNZ-REEL); 10% tolerance only | Suitable for legacy designs already using DS1232L and requiring minimal validation effort | Choose when migrating from DS1232L and 5% tolerance is not required |
Compared with MAX1232CSA+ and DS1232L+T&R, ADM1232AARNZ-REEL delivers tighter STROBE pulse detection (20 ns), lower supply current (20 μA typ.), and selectable 5%/10% trip tolerance - making it optimal for new designs prioritizing power efficiency, high-speed MCU compatibility, and flexible voltage margining.
Availability
ADM1232AARNZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical instruments requiring stable component supply, RoHS-compliant packaging, and guaranteed −40°C to +85°C operation.
Supply support for ADM1232AARNZ-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.
The ADM1232AARNZ-REEL belongs to Analog Devices' microprocessor supervisory product line, designed specifically for robust power monitoring and watchdog functionality in mission-critical embedded systems where reliability and deterministic reset behavior are essential.
FAQ
What is the exact VCC trip voltage for ADM1232AARNZ-REEL when TOLERANCE is grounded?
When the TOLERANCE pin is connected to GND, ADM1232AARNZ-REEL asserts reset at a nominal VCC trip voltage of 4.62 V (5% tolerance), with a guaranteed range of 4.50 V to 4.74 V over temperature. This value is specified in Table 1 of the Rev. A datasheet and applies directly to ADM1232AARNZ-REEL under −40°C to +85°C conditions.
Can ADM1232AARNZ-REEL be used with a 3.3 V microprocessor system?
No - ADM1232AARNZ-REEL is designed exclusively for +5 V supply monitoring and requires VCC between 4.5 V and 5.5 V. Its internal reference, STROBE input thresholds, and reset output drive levels are optimized for 5 V logic. For 3.3 V systems, Analog Devices offers the ADM1233 or ADM1234 families, which are not pin-compatible with ADM1232AARNZ-REEL.
How does the TD pin configure the STROBE timeout period in ADM1232AARNZ-REEL?
The TD pin selects one of three STROBE timeout periods: 0 V sets 150 ms (typ.), floating sets 600 ms (typ.), and VCC sets 1200 ms (typ.). These values are confirmed in Table 4 and Figure 6 of the ADM1232AARNZ-REEL datasheet. No external components are needed - the selection is purely voltage-state dependent.
Is ADM1232AARNZ-REEL pin-compatible with the MAX1232 and DS1232LP?
Yes - ADM1232AARNZ-REEL is explicitly stated in the General Description to be pin-compatible with MAX1232 and DS1232LP. All share identical 8-pin SOIC_N pinout, function mapping (PB RESET, TD, TOLERANCE, GND, RESET, RESET, STROBE, VCC), and electrical interface behavior, enabling drop-in replacement in existing layouts.
What is the maximum sink current capability of the RESET output in ADM1232AARNZ-REEL?
The RESET output of ADM1232AARNZ-REEL is an open-drain MOSFET rated to sink up to −12 mA (minimum −8 mA) when VCC is between 4.5 V and 5.5 V, as specified in the "OUTPUT CURRENT" row of Table 1. This allows direct interfacing with 5 V logic inputs requiring active-low reset assertion without additional buffering.
ADM1232AARNZ-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
ADM1232AARNZ-REEL FAQ
1.How can I place an order for ADM1232AARNZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1232AARNZ-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 ADM1232AARNZ-REEL reliable?
The price and inventory of ADM1232AARNZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1232AARNZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1232AARNZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1232AARNZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1232AARNZ-REEL?
ADM1232AARNZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1232AARNZ-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 ADM1232AARNZ-REEL?
For technical support, including ADM1232AARNZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1232AARNZ-REEL requirements.
6.How does Aetrix verify that ADM1232AARNZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1232AARNZ-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 ADM1232AARNZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1232AARNZ-REEL?
All ADM1232AARNZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1232AARNZ-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 ADM1232AARNZ-REEL part is unused and in its original packaging.
Return procedure for ADM1232AARNZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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