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Analog Devices Inc. ADM693ANZ
- Part No.:
- ADM693ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM693ANZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:125
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Product details
Overview
ADM693ANZ from Analog Devices is a 16-pin DIP microprocessor supervisory circuit with precision 4.4 V reset threshold, adjustable 50 ms/200 ms reset timeout, 100 ms/1.6 s watchdog timer, automatic battery backup switchover (VCC/VBATT), and CE gating for RAM write protection. It operates from –40°C to +85°C and supports industrial embedded systems requiring reliable power monitoring and data retention during brownout.
For engineers reviewing the ADM693ANZ datasheet, ADM693ANZ pinout, ADM693ANZ application, or ADM693ANZ equivalent, key selection criteria include its dual-mode watchdog timing, battery switchover hysteresis (50 mV down / 70 mV up), 5 ns CEOUT propagation delay, and compatibility with 4.5–5.5 V VCC and 2.0–4.0 V VBATT supplies.
Technical Context
The ADM693ANZ integrates a precision voltage detector (4.4 V ±0.15 V), an oscillator-selectable watchdog timer (100 ms or 1.6 s nominal, adjustable via OSC IN capacitor or external clock), and a low-dropout PMOS battery switch (1.5 Ω on-resistance in normal mode, 20 Ω in backup). Its RESET output remains functional down to VCC = 1 V, ensuring fail-safe microprocessor hold during deep brownout.
It features three dedicated status outputs: BATT ON (active-high battery-switch indicator), LOW LINE (active-low VCC-fail flag), and WDO (watchdog timeout signal). CEIN-to-CEOUT gating enforces write protection by forcing CEOUT high when VCC drops below reset threshold-critical for preserving CMOS RAM integrity during power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.4 V (min 4.25 V, max 4.48 V); ensures compatibility with ±10% 5 V supplies. |
| Reset Timeout | 50 ms or adjustable up to 200 ms; provides configurable power-up stabilization window. |
| Watchdog Period | 100 ms (short) or 1.6 s (long), selectable via OSC IN; prevents indefinite software lockup. |
| VOUT Drive Capability | 100 mA at VCC–0.5 V; powers CMOS RAM without external pass transistor. |
| Battery Switchover Hysteresis | 20 mV (70 mV rise / 50 mV fall); eliminates oscillation during slow VCC decay. |
| CE Propagation Delay | 5 ns typical; enables real-time chip enable gating during power transitions. |
| Supply Current (Active) | 1.95 mA max at 100 mA load; balances performance and low-power operation. |
| Standby Current (Battery Mode) | 1 µA max; extends backup battery life in long-term memory retention. |
Pinout & Package
ADM693ANZ is housed in a 16-pin plastic DIP (N-16) package with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is located at the top-left corner marked by a notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return path for all analog/digital functions; must be low-impedance connection. |
| 2 VBATT | Backup battery input | Accepts 2.0–4.0 V rechargeable or capacitor-based backup source; internally compared to VCC. |
| 3 VOUT | Switched output | Delivers VCC or VBATT (whichever higher) to RAM; rated for 100 mA continuous load. |
| 4 PFI | Power fail input | Non-inverting comparator input referenced to 1.3 V; triggers PFO low when <1.3 V. |
| 5 PFO | Power fail output | Active-low open-drain warning signal; used to initiate graceful shutdown before VCC collapse. |
| 6 WDO | Watchdog output | Active-low status flag indicating watchdog timeout; resets on next WDI transition. |
| 7 VCC | Main supply input | 4.5–5.5 V nominal; powers internal logic and enables VOUT switching. |
| 8 RESET | Active-low reset | Drives microprocessor reset line low for 50/200 ms after VCC recovery or watchdog fault. |
| 9 BATT ON | Battery active indicator | Active-high open-collector output; directly drives base of external PNP transistor for >100 mA loads. |
| 10 LOW LINE | VCC-fail flag | Active-low immediate response to VCC drop below threshold; faster than RESET assertion. |
| 11 OSC IN | Oscillator control | Accepts external clock (0–250 kHz) or 47 pF capacitor to adjust reset/watchdog timing. |
| 12 OSC SEL | Oscillator mode select | High/floating = internal oscillator; low = external clock/capacitor mode. |
| 13 RESET | Active-high reset | Inverted complement of pin 8; interfaces directly with processors requiring active-high reset. |
| 14 CEIN | Chip enable input | Logic input gated to CEOUT; forces write disable when VCC falls below reset threshold. |
| 15 CEOUT | Gated chip enable | Buffered, 5 ns-delayed replica of CEIN during valid VCC; forced high during brownout. |
| 16 WDI | Watchdog input | Three-level input (low/mid/high); toggling required within watchdog period to prevent reset. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset timeout | Configurable 50 ms or 200 ms pulse width via OSC IN capacitor or external clock-enables system-specific power-up sequencing. |
| Dual watchdog modes | Hardware-selectable 100 ms (fast) or 1.6 s (safe-boot) timeout; automatically defaults to 1.6 s post-reset to accommodate processor initialization. |
| Low-latency CE gating | 5 ns propagation delay from CEIN to CEOUT ensures real-time write protection during rapid VCC transients. |
| Battery switchover with hysteresis | 20 mV controlled hysteresis prevents chattering during marginal VCC conditions-critical for stable RAM backup. |
| Integrated PFI/PFO comparator | 1.3 V precision reference enables early power-fail detection with programmable warning margin via external resistor divider. |
| 1 V reset assertion guarantee | RESET remains active down to VCC = 1 V-ensures microprocessor remains held in reset during deep undervoltage events. |
Applications
| Industrial PLC Controller | Automotive Telematics Module |
|---|---|
Use Scenario: Programmable logic controller operating in factory environments with fluctuating 24 V DC supplies converted to 5 V. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, battery-backed RAM retention, and watchdog supervision of firmware execution. Use Value: Prevents corrupted I/O state during line sags by asserting RESET down to 1 V and enabling seamless VBATT switchover to preserve configuration data. | Use Scenario: Cellular-connected vehicle tracking unit powered by automotive battery (9–16 V) with 5 V regulation. IC Role / Device Role / Timing Role: Power monitor and backup manager ensuring GPS/IMU data persistence during engine cranking voltage dips. Use Value: Uses PFI/PFO to trigger NMI interrupt 10–15 ms before VCC crosses 4.4 V threshold-allowing time to save last known position before shutdown. |
| Medical Infusion Pump | Point-of-Sale Terminal |
Use Scenario: Battery-powered infusion device requiring FDA-compliant power failure response and nonvolatile memory integrity. IC Role / Device Role / Timing Role: Safety-critical supervisory circuit enforcing deterministic reset behavior and RAM write protection during AC loss. Use Value: CEOUT gating blocks RAM writes during VCC dropout, while BATT ON drives external PNP to sustain 150 mA RAM load beyond 100 mA internal limit. | Use Scenario: Retail terminal with EEPROM-based transaction logging and coin-cell backup. IC Role / Device Role / Timing Role: System supervisor managing power sequencing, watchdog supervision of payment stack, and EEPROM write-enable control. Use Value: Adjustable 200 ms reset timeout accommodates slow-starting peripherals; WDO output signals watchdog faults to host MCU for diagnostic logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM693ARZ | Same electrical specs; SOIC-16 (R-16) package instead of DIP-16 (N-16). | Requires PCB redesign for surface-mount assembly; no through-hole footprint compatibility. | Select ADM693ARZ for automated SMT production; retain ADM693ANZ for prototyping or legacy through-hole designs. |
| MAX693ACPP+ | Pin-compatible but different reset threshold (4.63 V), fixed 200 ms reset, no OSC IN adjustability, and no CE gating. | Lacks RAM write protection and timing flexibility-unsuitable where CEOUT control or adjustable watchdog is required. | Choose MAX693ACPP+ only if design requires exact MAX693 pinout and tolerates loss of CE gating and timing configurability. |
Compared with ADM693ARZ and MAX693ACPP+, the ADM693ANZ uniquely combines through-hole DIP-16 packaging, full CEIN/CEOUT write protection, and field-adjustable reset/watchdog timing-making it optimal for industrial prototypes and legacy board upgrades requiring robust, configurable supervision.
Availability
ADM693ANZ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive telematics modules, medical infusion pumps, and point-of-sale terminals requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADM693ANZ 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 since 1965.
The ADM690–ADM695 family was designed specifically for microprocessor system supervision-integrating reset generation, battery backup, watchdog timing, and memory protection into single-chip solutions for space-constrained embedded applications.
FAQ
What is the guaranteed reset voltage threshold range for ADM693ANZ?
The ADM693ANZ has a guaranteed reset voltage threshold range of 4.25 V minimum to 4.48 V maximum at +25°C, with typical value 4.4 V. This specification ensures reliable operation with 5 V ±10% power supplies and maintains functionality across the full –40°C to +85°C industrial temperature range. The ADM693ANZ uses internal hysteresis to prevent chatter near the threshold.
How does ADM693ANZ handle battery backup switchover during power transitions?
The ADM693ANZ performs automatic battery backup switchover by continuously comparing VCC and VBATT. When VCC falls below VBATT minus 50 mV, it switches VOUT to VBATT; when VCC rises above VBATT plus 70 mV, it reverts to VCC. This 20 mV hysteresis prevents oscillation. In backup mode, ADM693ANZ draws only 1 µA typical supply current while maintaining VOUT regulation.
Can ADM693ANZ drive more than 100 mA to VOUT, and how?
Yes, ADM693ANZ can drive more than 100 mA to VOUT by using the BATT ON output to drive the base of an external PNP transistor in parallel with the internal switch. The BATT ON pin sinks up to 35 mA and is designed for direct connection to the PNP base. This configuration extends VOUT current capability beyond the 100 mA internal limit while maintaining low dropout voltage.
What is the function of the CEIN and CEOUT pins on ADM693ANZ?
The CEIN and CEOUT pins on ADM693ANZ implement hardware-enforced RAM write protection. CEIN accepts the system's chip enable or write signal; CEOUT delivers a gated version with 5 ns propagation delay. When VCC drops below the reset threshold, CEOUT is forced high-regardless of CEIN state-to block writes to battery-backed CMOS RAM and preserve data integrity.
Does ADM693ANZ support both internal and external timing sources for reset and watchdog functions?
Yes, ADM693ANZ supports both internal and external timing sources. With OSC SEL high or floating, it uses its internal oscillator (10.24 kHz) and selects between 100 ms or 1.6 s watchdog periods via OSC IN logic level. With OSC SEL low, it accepts either an external clock (0–250 kHz) or a capacitor on OSC IN to set fully adjustable reset and watchdog timeouts-providing design flexibility unattainable with fixed-timing alternatives.
ADM693ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
ADM693ANZ FAQ
1.How can I place an order for ADM693ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM693ANZ 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 ADM693ANZ reliable?
The price and inventory of ADM693ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM693ANZ is usually 5 days.
3.What payment methods are accepted for ADM693ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM693ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM693ANZ?
ADM693ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM693ANZ 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 ADM693ANZ?
For technical support, including ADM693ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM693ANZ requirements.
6.How does Aetrix verify that ADM693ANZ is sourced from the original manufacturer or authorized distributors?
All ADM693ANZ 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 ADM693ANZ meets industry standards.
7.What is the process for return or replacement of ADM693ANZ?
All ADM693ANZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM693ANZ, 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 ADM693ANZ part is unused and in its original packaging.
Return procedure for ADM693ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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