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Analog Devices Inc./Maxim Integrated MAX693AMJE
- Part No.:
- MAX693AMJE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX693AMJE.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,848
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Product details
Overview
MAX693AMJE from Maxim Integrated is a microprocessor supervisory circuit designed for critical power monitoring in harsh environments, featuring 4.4V typical reset threshold, 200ms power-up reset timeout, 30μA operating supply current, and guaranteed RESET assertion down to VCC = +1V. It provides battery switchover, watchdog timer, chip-enable gating, and power-fail detection for industrial controllers and embedded systems operating from -55°C to +125°C.
For engineers reviewing the MAX693AMJE datasheet, MAX693AMJE pinout, MAX693AMJE application, or MAX693AMJE equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in extended-temperature systems, and validated alternative parts with documented functional differences.
Technical Context
The MAX693AMJE implements dual-reset outputs (active-low RESET and active-high RESET), a programmable watchdog timer with selectable long/short timeouts (1.6s / 100ms nominal), and internal oscillator-based timing control via OSC SEL/OSC IN. Its battery switchover comparator activates when VCC falls below VBATT − 0.3V and remains valid down to VBATT = 2.0V.
It integrates CE signal gating with ≤10ns propagation delay, a ±2% accurate power-fail comparator (PFI/PFO), and open-drain outputs with guaranteed low-voltage operation - all qualified for military-grade temperature range (-55°C to +125°C) per the AMJE suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical; ensures reliable μP reset initiation during brownout at nominal 5V rail. |
| Reset Timeout Period (Power-Up) | 200ms typical; provides sufficient hold time for stable clock and memory initialization before release. |
| Supply Current (Operating) | 30μA typical; enables low-power system monitoring without burdening main supply. |
| RESET Validity Range | Down to VCC = +1V; guarantees deterministic reset behavior even during deep undervoltage conditions. |
| Battery Switchover Threshold | VCC < VBATT − 0.3V; enables seamless transition to backup source before main supply collapse. |
| Power-Fail Accuracy | ±2% (guaranteed); supports precise low-battery or early power-loss warning in safety-critical systems. |
| Operating Temperature Range | -55°C to +125°C; qualified for aerospace, defense, and downhole industrial applications. |
Pinout & Package
MAX693AMJE is supplied in a 16-pin ceramic DIP (CERDIP) package rated for military temperature range and hermetic sealing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-Backup Input | Connects external backup source; enables switchover when VCC drops below VBATT − 0.3V. |
| 2 VOUT | Output Supply Voltage | Switched output sourced from VCC or VBATT; powers downstream logic and internal circuitry. |
| 3 VCC | Main Supply Input | 5V nominal input; monitored for reset assertion and CE gating control. |
| 4 GND | Ground Reference | 0V reference for all analog comparators, digital logic, and output drivers. |
| 5 BATT ON | Battery-On Status Output | Active-high open-drain signal indicating VBATT is active; used for status indication or PNP base drive. |
| 6 LOW LINE | Reset Comparator Buffer | Direct buffered output of reset threshold comparator; sinks 3.2mA at 0.1V saturation. |
| 7 OSC IN | External Oscillator Input | Accepts timing capacitor or external clock to configure watchdog/reset timeout periods. |
| 8 OSC SEL | Oscillator Select Input | Configures internal vs. external timing source; internally pulled up to VOUT. |
| 9 PFI | Power-Fail Input | Non-inverting input to uncommitted comparator; triggers PFO when voltage falls below 1.25V. |
| 10 PFO | Power-Fail Output | Open-drain comparator output; asserts low on PFI < 1.25V for low-battery or power-loss warning. |
| 11 WDI | Watchdog Input | Three-level input (high/low/floating); resets watchdog timer on state transition; floating disables function. |
| 12 CE OUT | Chip-Enable Output | Gated CE signal; disabled during reset to prevent spurious writes to CMOS RAM/EEPROM. |
| 13 CE IN | Chip-Enable Input | Input to CE gating circuit; high-impedance during reset to isolate upstream controller. |
| 14 WDO | Watchdog Output | Asserts low if WDI stalls > timeout period; drives reset and signals fault condition. |
| 15 RESET | Active-Low Reset Output | Open-drain output; guaranteed valid down to VCC = +1V; requires external pullup. |
| 16 RESET | Active-High Reset Output | Open-drain inverse of RESET; high-impedance when inactive; no internal pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs | Simultaneous active-low RESET and active-high RESET enable compatibility with μPs requiring either polarity reset input. |
| Programmable Watchdog Timer | Selectable 100ms short or 1.6s long timeout via OSC SEL/OSC IN; prevents firmware lockup in unattended systems. |
| Chip-Enable Gating | ≤10ns CE IN-to-CE OUT propagation delay with 75Ω series resistance; blocks errant writes during power transitions. |
| Battery Switchover with Low Dropout | VCC-to-VBATT switchover with <1.6Ω on-resistance and validity down to VBATT = 2.0V; supports supercapacitor backup. |
| Extended Temperature Operation | Qualified from -55°C to +125°C in hermetic CERDIP package; meets MIL-PRF-38535 requirements. |
Applications
| Industrial Programmable Logic Controller (PLC) | Aerospace Flight Control Unit |
|---|---|
Use Scenario: Continuous operation in vibration-prone, wide-temperature environments with redundant power sources. IC Role / Device Role / Timing Role: Supervises 5V main supply and lithium-thionyl chloride backup; asserts RESET on brownout and triggers BATT ON for switchover confirmation. Use Value: Prevents corrupted I/O state during transient undervoltage; maintains deterministic boot sequence across -55°C to +125°C. |
Use Scenario: Safety-critical avionics subsystem requiring fail-safe reset and watchdog supervision under EMI-rich conditions. IC Role / Device Role / Timing Role: Monitors primary bus voltage and feeds WDI from flight computer's heartbeat line; asserts dual RESET outputs to initiate safe state recovery. Use Value: Guarantees reset validity down to VCC = +1V and provides 200ms timeout margin for FPGA configuration and sensor calibration. |
| Downhole Oilfield Telemetry Module | Military Vehicle Engine Control Unit |
Use Scenario: High-temperature data acquisition node powered by thermal battery with limited recharge cycles. IC Role / Device Role / Timing Role: Uses PFI/PFO to monitor battery health; switches to VBATT on main rail failure; asserts RESET to halt logging during voltage collapse. Use Value: ±2% power-fail accuracy enables precise end-of-life prediction; battery switchover hysteresis prevents chatter near threshold. |
Use Scenario: Embedded engine management system exposed to thermal cycling and load dump transients. IC Role / Device Role / Timing Role: Gating CE signals to EEPROM during cranking events; using LOW LINE to trigger diagnostic logging on undervoltage. Use Value: CE IN high-impedance mode during reset prevents flash corruption; 30μA quiescent current extends battery runtime in standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX693AESE | 16-pin narrow SO package; -40°C to +85°C rating; same electrical specs but commercial temp grade. | Suitable for industrial enclosures with controlled ambient; lacks hermetic seal and extended cold performance. | Select for cost-sensitive, non-military designs where CERDIP reliability and -55°C startup are unnecessary. |
| MAX800M | Same 4.4V reset threshold and ±2% power-fail accuracy; offered in TSSOP/SO/DIP; -40°C to +85°C only. | Targeted at commercial/industrial computing; no military temp qualification or CERDIP option. | Choose when footprint flexibility (TSSOP) or lead-free compliance is prioritized over extreme temperature resilience. |
Compared with MAX693AMJE, MAX693AESE offers identical functionality in a surface-mount package but sacrifices military-grade temperature range and hermetic reliability, while MAX800M provides the same core supervision features in modern packages but lacks -55°C capability and CERDIP ruggedization.
Availability
MAX693AMJE is available at Aetrix Electronics and suitable for aerospace vehicle control systems, downhole telemetry modules, and military-grade embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX693AMJE 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding applications.
The MAX691A/MAX693A family was designed specifically for robust microprocessor supervision in mission-critical systems, emphasizing low-power operation, wide-temperature reliability, and integrated protection functions like CE gating and battery switchover.
FAQ
What is the guaranteed reset threshold voltage for MAX693AMJE?
The MAX693AMJE has a guaranteed reset threshold voltage of 4.25V minimum and 4.50V maximum, with 4.40V typical. This specification applies across its full operating temperature range (-55°C to +125°C) and ensures consistent reset initiation during brownout events in high-reliability systems.
Does MAX693AMJE support battery backup with supercapacitors?
Yes, MAX693AMJE is MaxCap® and SuperCap compatible. Its VBATT input supports switchover from main supply to backup sources including supercapacitors, with guaranteed operation down to VBATT = 2.0V and low on-resistance (<15Ω) to minimize voltage drop during transition.
How does the watchdog timer behave when WDI is left unconnected on MAX693AMJE?
When WDI is left unconnected on MAX693AMJE, an internal voltage divider biases it to ~1.6V, disabling the watchdog function. The WDO output remains high, and no reset pulses are generated - a deliberate design feature to simplify integration when watchdog supervision is not required.
Can MAX693AMJE operate with VCC below 4.5V?
Yes, MAX693AMJE guarantees RESET assertion down to VCC = +1V and remains functional with VCC as low as 0V (when VBATT is active). However, its specified operating voltage range is +4.5V to +5.5V; operation below 4.5V is supported only for reset assertion and battery-backup mode, not full functionality.
What package type is used for MAX693AMJE and why is it significant?
MAX693AMJE uses a 16-pin ceramic DIP (CERDIP) package. This hermetically sealed package provides superior moisture resistance, thermal stability, and reliability for military, aerospace, and downhole applications - directly enabling its -55°C to +125°C qualification and long-term field endurance.
MAX693AMJE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-CDIP (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:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CDIP
MAX693AMJE FAQ
1.How can I place an order for MAX693AMJE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX693AMJE 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 MAX693AMJE reliable?
The price and inventory of MAX693AMJE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX693AMJE is usually 5 days.
3.What payment methods are accepted for MAX693AMJE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX693AMJE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX693AMJE?
MAX693AMJE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX693AMJE 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 MAX693AMJE?
For technical support, including MAX693AMJE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX693AMJE requirements.
6.How does Aetrix verify that MAX693AMJE is sourced from the original manufacturer or authorized distributors?
All MAX693AMJE 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 MAX693AMJE meets industry standards.
7.What is the process for return or replacement of MAX693AMJE?
All MAX693AMJE units undergo pre-shipment inspection (PSI). If there is an issue with MAX693AMJE, 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 MAX693AMJE part is unused and in its original packaging.
Return procedure for MAX693AMJE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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