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Analog Devices Inc. ADM8692ANZ
- Part No.:
- ADM8692ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM8692ANZ.pdf
- Description:
- IC SUPERVISOR MPU 4.40V 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,811
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Product details
Overview
ADM8692ANZ from Analog Devices is a microprocessor supervisory circuit providing power-on reset, battery backup switchover, watchdog timer, and power-fail detection in a single 16-lead TSSOP package. It features a 4.65 V reset threshold, 50 ms reset pulse width, 1.6 sec watchdog timeout, 0.7 Ω VOUT switch resistance, and operates down to 1 V VCC for guaranteed reset assertion during brownout.
For engineers reviewing the ADM8692ANZ datasheet, ADM8692ANZ pinout, ADM8692ANZ application, or ADM8692ANZ equivalent, key selection considerations include its fixed 4.65 V reset threshold, integrated battery switchover with 100 mA VOUT drive, 3 ns CE gating (ADM8691/ADM8695 variant), and compatibility with 5 V ±5% systems requiring robust power monitoring and fail-safe memory retention.
Technical Context
The ADM8692ANZ implements a precision voltage monitor with 40 mV hysteresis and guarantees RESET assertion down to 1 V VCC, ensuring reliable microprocessor hold during deep brownout. Its internal PMOS VOUT switch delivers up to 100 mA with only 0.7 Ω on-resistance in normal mode and 7 Ω in backup mode.
A dedicated 1.3 V power-fail comparator (PFI/PFO) provides early warning of supply collapse, while the watchdog timer monitors WDI transitions with fixed 1.6 sec timeout - independent of external clocking or capacitor configuration, distinguishing it from adjustable variants ADM8691/ADM8695.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65 V nominal; ensures compatibility with 5 V ±5% supplies and stable reset under typical industrial rail tolerances. |
| Reset Pulse Width | 50 ms typical; provides sufficient stabilization time for microprocessors and peripheral ICs after power-up. |
| VOUT Drive Capability | 100 mA max at ≤0.2 V dropout; eliminates need for external pass transistor when powering CMOS RAM banks. |
| Watchdog Timeout | 1.6 sec fixed; prevents spurious resets while allowing adequate software recovery time after system stall. |
| Battery Switchover Hysteresis | 20 mV; prevents oscillation during slow VCC decay near VBATT crossover point. |
| Supply Current (Active) | 200 μA typical; enables low-power operation in always-on monitoring applications without significant system overhead. |
| Operating Voltage Range | VCC = 4.75–5.5 V; supports standard 5 V logic rails with margin for ripple and tolerance. |
Pinout & Package
ADM8692ANZ is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), compatible with surface-mount assembly and space-constrained embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBATT (Pin 1) | Backup Battery Input | Accepts 2.0–4.25 V battery source; internally compared to VCC to enable seamless switchover to backup power. |
| VOUT (Pin 2) | Switched Output | Delivers VCC or VBATT (whichever is higher) to RAM or logic; rated for 100 mA continuous load with <0.2 V dropout. |
| VCC (Pin 3) | Main Power Supply Input | 5 V nominal input; powers internal circuitry and serves as primary source for VOUT until brownout or failure. |
| GND (Pin 4) | Ground Reference | Common 0 V reference for all analog comparators, digital outputs, and switching elements. |
| PFI (Pin 9) | Power-Fail Input | Non-inverting input to 1.3 V comparator; triggers PFO low when supply drops below warning threshold. |
| PFO (Pin 10) | Power-Fail Output | Active-low interrupt signal used to initiate data save routines before main supply collapse. |
| WDI (Pin 11) | Watchdog Input | Three-level input monitored for transitions; timeout causes RESET assertion if no toggle occurs within 1.6 sec. |
| RESET (Pin 15) | Reset Output | Active-low open-drain output; holds microprocessor in reset until VCC stabilizes above 4.65 V for ≥50 ms. |
| OSC SEL (Pin 8) | Oscillator Select | Fixed high (internal oscillator enabled); disables external timing options, locking watchdog and reset timing to factory defaults. |
| OSC IN (Pin 7) | Oscillator Input | Unused in ADM8692ANZ; tied internally or left floating since OSC SEL fixes timing to internal 1.6 sec/50 ms configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Reset Below 1 V VCC | Ensures microprocessor remains held in valid reset state even during severe brownout conditions where VCC decays to 1 V. |
| Integrated Battery Switchover | Automatically routes VBATT to VOUT when VCC falls below VBATT + 70 mV, preserving RAM contents without external FETs or control logic. |
| Low-Power Supervision | Consumes only 200 μA active current and 0.4 μA in battery-backup mode, extending system uptime in energy-sensitive applications. |
| Fast CE Gating (3 ns) | Enables precise write protection of CMOS RAM by forcing CEOUT high within 3 ns of VCC dropping below reset threshold. |
| Power-Fail Warning Comparator | 1.3 V PFI threshold provides early indication of supply degradation, allowing time-critical data preservation before full failure. |
Applications
| Industrial PLC Control | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Programmable logic controller maintains real-time I/O state during AC mains interruption using onboard backup battery. IC Role / Device Role / Timing Role: ADM8692ANZ monitors 5 V system rail, asserts RESET to halt CPU execution, switches VOUT to VBATT to sustain SRAM, and triggers PFO to initiate safe I/O shutdown sequence. Use Value: Prevents corrupted control logic and preserves last-known sensor states for post-failure diagnostics without external supervision circuitry. | Use Scenario: Portable ultrasound device retains calibration data and patient session history during brief battery swaps or low-voltage events. IC Role / Device Role / Timing Role: ADM8692ANZ detects falling VCC, activates RESET to freeze processor state, enables VBATT-to-VOUT switchover for SRAM retention, and uses PFO to flag imminent power loss to firmware. Use Value: Eliminates need for EEPROM writes during power transitions, reducing wear and latency while ensuring zero-data-loss memory backup. |
| Automotive Infotainment Head Unit | Network Router with Persistent Configuration |
Use Scenario: Vehicle ignition cycle causes rapid 12 V → 5 V conversion transients; head unit must avoid boot-loop due to unstable 5 V rail. IC Role / Device Role / Timing Role: ADM8692ANZ provides clean 50 ms reset pulse after VCC exceeds 4.65 V, blocks spurious resets during 100–500 ms startup surges, and monitors for brownout during engine cranking. Use Value: Guarantees deterministic boot behavior across wide temperature range (−40°C to +85°C) and eliminates field failures caused by marginal power sequencing. | Use Scenario: Enterprise router retains routing tables and security keys in battery-backed SRAM during unexpected AC loss or firmware update reboot. IC Role / Device Role / Timing Role: ADM8692ANZ asserts RESET to halt packet processing, switches VOUT to VBATT to maintain SRAM voltage, and uses WDI monitoring to detect firmware hang during flash programming. Use Value: Enables atomic firmware updates with rollback capability and prevents configuration corruption during power disruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8691ARWZ | 16-lead TSSOP; adjustable reset (50/200 ms) and watchdog (100 ms/1.6 s/adjustable); includes CEIN/CEOUT and WDO pins. | Supports dynamic timeout tuning and active-high CE gating for complex memory protection schemes. | Select when design requires programmable timing or dual-reset polarity (RESET/LOW LINE). |
| MAX692CPA+ | 8-lead PDIP/SOIC; 4.65 V reset threshold; 200 ms reset pulse; no battery switchover or PFI/PFO. | Limited to basic reset generation without power-fail warning or backup management. | Select only for cost-sensitive, space-tolerant designs needing minimal supervision without battery support. |
Compared with ADM8692ANZ, ADM8691ARWZ offers greater flexibility in timing configuration and enhanced memory interface control, while MAX692CPA+ provides simpler, lower-pin-count reset-only functionality at the expense of missing battery switchover and power-fail detection - making ADM8692ANZ optimal for compact, feature-complete 5 V supervisory needs.
Availability
ADM8692ANZ is available at Aetrix Electronics and suitable for industrial PLC control, medical diagnostic equipment, automotive infotainment head units, and network routers requiring stable component supply with long-term lifecycle assurance.
Supply support for ADM8692ANZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The ADM869x family was designed specifically for microprocessor system supervision - integrating reset generation, battery backup, watchdog monitoring, and power-fail warning into a single IC to reduce board space and improve reliability in mission-critical embedded applications.
FAQ
What is the reset voltage threshold of the ADM8692ANZ?
The ADM8692ANZ has a nominal reset voltage threshold of 4.65 V, with guaranteed minimum and maximum values of 4.5 V and 4.73 V respectively. This ensures reliable reset assertion for standard 5 V ±5% power supplies and remains functional down to 1 V VCC during brownout conditions, maintaining system stability throughout power collapse.
Does the ADM8692ANZ support battery backup switchover?
Yes, the ADM8692ANZ supports automatic battery backup switchover via its VBATT and VOUT pins. When VCC falls below VBATT + 70 mV, the internal switch connects VBATT to VOUT, sustaining CMOS RAM or other low-power logic. The switchover features 20 mV hysteresis to prevent oscillation and delivers up to 100 mA with <0.2 V dropout in normal mode.
Can the watchdog timeout period be adjusted on the ADM8692ANZ?
No, the ADM8692ANZ has a fixed 1.6 second watchdog timeout period. Unlike the ADM8691/ADM8695 variants, it does not support external capacitor or clock-based adjustment - OSC SEL is internally fixed to enable the internal oscillator, and OSC IN is unused. This simplifies design for applications requiring deterministic, unchangeable watchdog behavior.
What is the function of the PFI and PFO pins on the ADM8692ANZ?
The PFI (Power-Fail Input) pin connects to a voltage divider monitoring the main supply, triggering the PFO (Power-Fail Output) to go low when PFI falls below 1.3 V. This provides early warning of impending power loss, enabling firmware to execute critical save routines before VCC collapses below the 4.65 V reset threshold - a key feature distinguishing ADM8692ANZ from basic reset-only supervisors.
Is the ADM8692ANZ pin-compatible with other devices in the ADM869x family?
The ADM8692ANZ shares the same 16-lead TSSOP footprint and core pinout (VBATT, VOUT, VCC, GND, PFI, PFO, WDI, RESET, OSC SEL, OSC IN) with ADM8691/ADM8695, but lacks CEIN, CEOUT, WDO, LOW LINE, and BATT ON pins. While mechanical mounting is identical, full functional compatibility requires verifying required features - e.g., CE gating or dual-reset outputs are absent in ADM8692ANZ.
ADM8692ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADM8692ANZ FAQ
1.How can I place an order for ADM8692ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8692ANZ 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 ADM8692ANZ reliable?
The price and inventory of ADM8692ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8692ANZ is usually 5 days.
3.What payment methods are accepted for ADM8692ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8692ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8692ANZ?
ADM8692ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8692ANZ 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 ADM8692ANZ?
For technical support, including ADM8692ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8692ANZ requirements.
6.How does Aetrix verify that ADM8692ANZ is sourced from the original manufacturer or authorized distributors?
All ADM8692ANZ 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 ADM8692ANZ meets industry standards.
7.What is the process for return or replacement of ADM8692ANZ?
All ADM8692ANZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM8692ANZ, 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 ADM8692ANZ part is unused and in its original packaging.
Return procedure for ADM8692ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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