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Analog Devices Inc./Maxim Integrated MAX696EPE+
- Part No.:
- MAX696EPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX696EPE+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX696EPE+ from Maxim Integrated is a microprocessor supervisory circuit in 16-pin PDIP package, providing six integrated functions: adjustable low-line reset (1.25V–1.35V threshold), watchdog timer (100ms/1.6s or adjustable), power-fail warning (1.3V PFI threshold), battery-backup switching (VBATT to VOUT switchover at 50mV–70mV hysteresis), RESET/RESET outputs with 50ms default timeout, and BATT ON control signal. It is used in industrial controllers and critical μP systems requiring reliable power monitoring and RAM backup.
For engineers reviewing the MAX696EPE+ datasheet, MAX696EPE+ pinout, MAX696EPE+ application, or MAX696EPE+ equivalent, key selection considerations include its -40°C to +85°C extended temperature rating, battery-switching capability (absent in MAX697), 1μA max battery-standby current, and dual reset outputs with precise 1.3V reference tolerance.
Technical Context
The MAX696EPE+ integrates a precision 1.3V bandgap reference for both LLIN and PFI comparators, enabling independent low-line detection and power-fail warning with ±50mV PFI–LLIN threshold difference. Its internal oscillator (10.24kHz nominal) drives reset timing and watchdog timeout, configurable via OSC SEL and OSC IN pins for fixed or capacitor-adjusted periods.
Battery switchover uses a 200Ω MOSFET to connect VBATT to VOUT when VCC drops below VBATT − 70mV (rising) or VBATT − 50mV (falling), with 20mV hysteresis. The BATT ON output sinks 7mA and directly drives external PNP transistors, while VOUT delivers up to 50mA in VCC mode and maintains <1μA quiescent current in full battery-backup mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage (VCC) | 3.0V to 5.5V - supports standard 3.3V/5V μP rails without level-shifting. |
| Low-Line Threshold | 1.25V–1.35V - tightly specified comparator input for robust brownout detection. |
| Reset Timeout Delay | 35ms–70ms (typ 50ms) - ensures microprocessor clock stabilization before release. |
| Watchdog Timeout | 100ms or 1.6s (internal); adjustable via external capacitor - enables flexible software supervision. |
| Battery Standby Current | ≤1μA (max) at VCC = 0V, VBATT = 2.8V - extends lithium backup battery life for years. |
| VBATT Range | 2.0V to VCC − 0.3V - compatible with common 3V lithium or supercapacitor backup sources. |
| Temperature Range | -40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
MAX696EPE+ is housed in a 16-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin 12 is No Connection (N.C.). All pins are CMOS-compatible with ESD protection per MIL-STD-883 Class 3B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Backup-battery input | Connects to lithium cell or capacitor; source for VOUT during VCC loss. |
| 2 VOUT | Switched power output | Delivers higher of VCC or VBATT; powers CMOS RAM with ≤50mA capability. |
| 3 VCC | Main supply input | Primary 3.0–5.5V rail; powers internal circuitry and enables VOUT sourcing. |
| 4 GND | Ground reference | Common return for all analog/digital signals; must be low-impedance. |
| 5 BATT ON | Battery-active indicator | Active-low open-drain output; sinks 7mA to drive external PNP base. |
| 6 LOW LINE | Low-line fault flag | Asserts low when LLIN < 1.3V; independent of RESET timing logic. |
| 7 OSC IN | Oscillator timing input | Accepts external clock or capacitor (e.g., 47pF → ~4kHz) to set reset/watchdog period. |
| 8 OSC SEL | Oscillator mode select | High/floating → internal oscillator; low → external clock/capacitor mode. |
| 9 PFI | Power-fail input | Noninverting comparator input; monitors unregulated rail or battery voltage. |
| 10 PFO | Power-fail output | Active-low interrupt signal; forces low when PFI < 1.3V or VCC < VBATT. |
| 11 WDI | Watchdog input | Three-level input (low/mid/high); resets timer on each transition; floating disables watchdog. |
| 12 N.C. | No connection | Must remain unconnected; no internal bond or function. |
| 13 LLIN | Low-line sense input | CMOS input to 1.3V comparator; requires bypass cap to reject noise. |
| 14 WDO | Watchdog output | Active-low fault flag; stays low until WDI transition occurs after timeout. |
| 15 RESET | Active-low reset output | Drives μP reset line; 50ms pulse on brownout or unserviced watchdog. |
| 16 RESET | Active-high reset output | Inverted replica of RESET; eliminates need for external inverter. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated battery switchover | Automatic MOSFET-based switchover between VCC and VBATT with 20mV hysteresis prevents oscillation during slow VCC decay. |
| Dual reset outputs | Simultaneous active-low (RESET) and active-high (RESET) outputs eliminate external inverters and reduce BOM count. |
| Independent power-fail detection | Separate 1.3V PFI comparator allows early warning (e.g., 5–10ms before LLIN trip) for safe data save in nonvolatile memory. |
| Configurable watchdog timing | Three modes (100ms, 1.6s, or capacitor-adjustable) enable matching to system boot time and firmware loop intervals. |
| Ultra-low battery leakage | ≤10nA typical VBATT leakage current compensates for lithium cell self-discharge, extending shelf life beyond 10 years. |
Applications
| Industrial PLC Controllers | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 24V DC supplies and frequent power interruptions. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, watchdog supervision, and battery-backed RAM retention during AC mains failure. Use Value: Prevents corrupted ladder logic execution and preserves I/O state using <1μA battery standby current and 50mV switchover hysteresis. |
Use Scenario: Portable ultrasound or patient monitor units requiring guaranteed data integrity during battery-swapped maintenance cycles. IC Role / Device Role / Timing Role: Power supervisor generating NMI interrupt via PFO to trigger RAM-to-flash save before VCC collapse, then enabling seamless battery backup. Use Value: Enables deterministic 1.3V power-fail warning with ±50mV PFI–LLIN offset, allowing ≥8ms margin for flash write completion before RESET assertion. |
| Automotive Telematics Gateways | Smart Energy Meters |
Use Scenario: CAN-connected telematics modules exposed to automotive battery transients (load dump, cold crank) and wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Dual-voltage supervisor monitoring both 5V logic rail and 3.3V MCU core, with independent LLIN and PFI inputs for rail-specific fault isolation. Use Value: Guarantees operation across full -40°C to +85°C range and rejects >100V/μs transients on VCC/VBATT pins per Absolute Maximum Ratings. |
Use Scenario: Revenue-grade electricity meters with tamper-resistant nonvolatile storage and regulatory compliance for 10-year battery-backed data retention. IC Role / Device Role / Timing Role: Battery management supervisor controlling VOUT delivery to RTC and SRAM, with BATT ON driving external PNP for >50mA peak loads. Use Value: Achieves <1μA max battery-standby current and 200Ω MOSFET dropout to sustain 10-year lithium coin-cell life with <1% annual capacity loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX697EPE+ | Lacks VBATT/VOUT/BATT ON pins; adds CE IN/CE OUT for RAM write protection; consumes <250µA (vs. 1.5–7mA in VCC mode for MAX696EPE+). | Suitable where battery backup is unnecessary but CMOS RAM write-protection is required (e.g., EEPROM-based systems). | Select MAX697EPE+ only if write-gating is needed and battery switchover is omitted; not drop-in compatible due to pinout differences (VBATT→CE IN, VOUT→CE OUT, etc.). |
| TPS3823MPWPT | Single-supply (VCC only), no battery switching; fixed 2.93V reset threshold; 200ms reset timeout; no watchdog or PFI functionality. | Applicable only for basic power-on reset in cost-sensitive consumer devices without supervision complexity. | Choose TPS3823MPWPT only for simple reset-only use cases; lacks MAX696EPE+'s six-function integration, making it unsuitable for battery-backed or watchdog-critical designs. |
Compared with MAX697EPE+, MAX696EPE+ provides essential battery switchover and VOUT regulation but excludes CE gating; versus TPS3823MPWPT, it delivers comprehensive supervision (watchdog, PFI, dual reset, adjustable timing) at higher component count efficiency and design flexibility.
Availability
MAX696EPE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, automotive telematics gateways, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX696EPE+ 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) designs high-performance analog and mixed-signal ICs for industrial, automotive, and computing applications, with emphasis on reliability, integration, and power efficiency.
The MAX696EPE+ belongs to Maxim's microprocessor supervisory product line, engineered to consolidate discrete reset, watchdog, battery-switching, and power-fail functions into a single IC for mission-critical embedded systems.
FAQ
What is the battery switchover threshold behavior of the MAX696EPE+?
The MAX696EPE+ switches VOUT from VCC to VBATT when VCC falls below VBATT − 50mV (power-down) and reverts when VCC rises above VBATT − 70mV (power-up), with 20mV hysteresis to prevent chatter. This behavior is confirmed in the Electrical Characteristics table under "Battery Switchover Threshold" and "Battery Switchover Hysteresis" sections of the MAX696EPE+ datasheet.
Can the MAX696EPE+ watchdog timer be disabled, and how?
Yes, the MAX696EPE+ watchdog timer is disabled when the WDI pin is left floating or driven to mid-supply (~38% of VCC), as stated in the Electrical Characteristics note and Pin Description. This is an inherent feature of the WDI three-level input architecture and requires no configuration register or external hardware change.
What is the maximum load current supported by the VOUT pin of the MAX696EPE+?
The VOUT pin of the MAX696EPE+ supports up to 50mA when sourced from VCC, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. For loads exceeding 50mA, the BATT ON output can drive an external PNP transistor to augment current delivery while maintaining low dropout voltage.
How does the MAX696EPE+ handle power-fail detection when VCC drops below VBATT?
When VCC drops below VBATT, the MAX696EPE+ disables the PFI comparator and forces PFO low, as documented in the Pin Description and Applications Information sections. This prevents false power-fail interrupts during battery-backup mode and ensures PFO only asserts during valid VCC-supplied operation.
Is the MAX696EPE+ pin-compatible with other members of the MAX696/MAX697 family?
No - the MAX696EPE+ is not pin-compatible with MAX697 variants due to fundamental pin function differences: MAX696EPE+ uses pins 1 (VBATT), 2 (VOUT), and 5 (BATT ON), whereas MAX697EPE+ repurposes those pins as CE IN (13), CE OUT (12), and N.C. (5). Pin compatibility exists only within same-family temperature/package variants (e.g., MAX696CPE vs. MAX696EPE).
MAX696EPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, 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
MAX696EPE+ FAQ
1.How can I place an order for MAX696EPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX696EPE+ 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 MAX696EPE+ reliable?
The price and inventory of MAX696EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX696EPE+ is usually 5 days.
3.What payment methods are accepted for MAX696EPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX696EPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX696EPE+?
MAX696EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX696EPE+ 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 MAX696EPE+?
For technical support, including MAX696EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX696EPE+ requirements.
6.How does Aetrix verify that MAX696EPE+ is sourced from the original manufacturer or authorized distributors?
All MAX696EPE+ 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 MAX696EPE+ meets industry standards.
7.What is the process for return or replacement of MAX696EPE+?
All MAX696EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX696EPE+, 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 MAX696EPE+ part is unused and in its original packaging.
Return procedure for MAX696EPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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