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Hello, Please ask a question about SP703EN Datasheet
# Example questions:
➢ Describe the conditions under which the backup-battery switchover occurs, and how the sp703/704 manages power sources during this transition.
➢ What are the four key functions provided by the sp703/704 devices?
➢ How does the power-fail comparator (pfi/pfo) function, and what is its purpose in the system?
| Part No. | SP703EN |
| Manufacturer | SIPEX |
| Size | 216 Kbytes |
| Pages | 16 pages |
| Description | Low Power Microprocessor Supervisory with Battery Switch-Over |
Okay, here's a summary of the provided document (SP703/704 datasheet), breaking down the key features, operation, and applications.
SP703/704: Low-Voltage Microprocessor Supervisory Circuit
Core Function: This is an integrated circuit designed to monitor and protect microprocessors (µPs) and associated digital circuitry. It provides four main functions:
1. Battery Backup: Switches to a backup battery (connected to V<sub>BATT</sub>) to maintain power to CMOS RAM or other logic when the primary power (V<sub>CC</sub>) fails.
2. Reset Output: Generates a reset signal to the µP during power-up, power-down, and brownout conditions, ensuring a known starting state. It also responds to a manual reset input.
3. Power-Fail Comparator: Detects under-voltage conditions on a separate power rail (PFI) and signals this to the µP, allowing for controlled shutdown.
4. Low Battery Detection: Monitors the backup battery and can signal a low-battery condition.
Key Features & Differences:
️· Two Versions: SP703 and SP704. The main difference is the reset threshold voltage:
- SP703: Resets when V<sub>CC</sub> drops below 4.65V.
- SP704: Resets when V<sub>CC</sub> drops below 4.4V.
️· Manual Reset: A manual reset input is available.
️· Power-Fail Warning: The PFI/PFO pins enable detection of failing power supplies.
️· Low Power Consumption: Optimized for battery-powered applications.
How it Works (Operation):
️· Reset Output: Asserted (low) during power-up, brownout, or manual reset. Remains low for a fixed period after V<sub>CC</sub> exceeds the reset threshold.
️· Battery Backup Switching: When V<sub>CC</sub> falls below the reset threshold, the circuit switches to the backup battery (V<sub>BATT</sub>) to maintain power to critical loads.
️· Power-Fail Comparator: Compares the voltage on the PFI pin to an internal 1.25V reference. If PFI falls below 1.25V, the PFO output goes low, signaling a power-fail condition.
️· Switchover Comparators: Ensures V<sub>BATT</sub> only connects to the circuit when V<sub>CC</sub> is lower.
Applications:
️· Automotive Systems
️· Intelligent Instruments
️· Battery-Powered Computers
️· Battery-Powered Controllers
️· Any application requiring reliable power monitoring and protection for a microprocessor.
In essence, the SP703/704 is a comprehensive power management IC designed to improve the reliability and robustness of microprocessor-based systems.
SP703/704: Low-Voltage Microprocessor Supervisory Circuit
Core Function: This is an integrated circuit designed to monitor and protect microprocessors (µPs) and associated digital circuitry. It provides four main functions:
1. Battery Backup: Switches to a backup battery (connected to V<sub>BATT</sub>) to maintain power to CMOS RAM or other logic when the primary power (V<sub>CC</sub>) fails.
2. Reset Output: Generates a reset signal to the µP during power-up, power-down, and brownout conditions, ensuring a known starting state. It also responds to a manual reset input.
3. Power-Fail Comparator: Detects under-voltage conditions on a separate power rail (PFI) and signals this to the µP, allowing for controlled shutdown.
4. Low Battery Detection: Monitors the backup battery and can signal a low-battery condition.
Key Features & Differences:
️· Two Versions: SP703 and SP704. The main difference is the reset threshold voltage:
- SP703: Resets when V<sub>CC</sub> drops below 4.65V.
- SP704: Resets when V<sub>CC</sub> drops below 4.4V.
️· Manual Reset: A manual reset input is available.
️· Power-Fail Warning: The PFI/PFO pins enable detection of failing power supplies.
️· Low Power Consumption: Optimized for battery-powered applications.
How it Works (Operation):
️· Reset Output: Asserted (low) during power-up, brownout, or manual reset. Remains low for a fixed period after V<sub>CC</sub> exceeds the reset threshold.
️· Battery Backup Switching: When V<sub>CC</sub> falls below the reset threshold, the circuit switches to the backup battery (V<sub>BATT</sub>) to maintain power to critical loads.
️· Power-Fail Comparator: Compares the voltage on the PFI pin to an internal 1.25V reference. If PFI falls below 1.25V, the PFO output goes low, signaling a power-fail condition.
️· Switchover Comparators: Ensures V<sub>BATT</sub> only connects to the circuit when V<sub>CC</sub> is lower.
Applications:
️· Automotive Systems
️· Intelligent Instruments
️· Battery-Powered Computers
️· Battery-Powered Controllers
️· Any application requiring reliable power monitoring and protection for a microprocessor.
In essence, the SP703/704 is a comprehensive power management IC designed to improve the reliability and robustness of microprocessor-based systems.
| Part No. | SP703EN |
| Manufacturer | SIPEX |
| Size | 216 Kbytes |
| Pages | 16 pages |
| Description | Low Power Microprocessor Supervisory with Battery Switch-Over |
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