The real-time clock module RA8000CE provides precise and reliable timing for automotive electronics, facilitating engineers to quickly develop and design

Apr 11,2024
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EPSON has launched a high-precision real-time clock module RA8000CE for the automotive market, which has received widespread market attention for its high stability and excellent performance. Internally integrated with a 32.768 kHz digital temperature compensated crystal oscillator (DTCXO), it ensures high-precision timing within the temperature range of -40 ° C to 125 ° C; Certified according to AEC-Q100 automotive standards, it meets all high standards and strict quality requirements for automotive design, manufacturing, and process control. In addition, there are various practical functions, such as time alarms, wake-up timers, timestamps, etc., which can record two times and dates when external or internal events occur, as well as the power status detected through self-monitoring function,

Adapt to extreme environments and provide precise timing requirements

The real-time clock module RA8000CE integrates a 32.768 KHz DTCXO (digital temperature compensated Xtal oscillator) internally, which can still provide high-precision time information when the temperature on the customer's circuit board changes (up to 125 ° C). It exhibits outstanding stability under extreme temperature conditions, with a monthly average temperature coefficient of ± 5.0x10.6 in the range of -40 ℃ to+85 ℃, while the monthly average temperature coefficients in the range of+85 ℃ to+105 ℃ and+105 ℃ to+125 ℃ are+8.0x10-6 and ± 50.0 x10-6, respectively. This high stability enables A8000CE to meet the application needs in various harsh environments, providing a reliable real-time clock source for automotive electronic systems.

Adding redundancy to the system to ensure stable signal output

The RA8000CE also has automatic power switch and delayed reset function. When a VDD voltage drop is detected, the module will automatically switch to the backup power supply and can output a reset signal to ensure the stable operation of the system. The SOUT function can output the status of selected internal flags (interrupt flag, voltage drop detection flag), facilitating system status monitoring.

Compared with traditional solutions, it reduces the need for external reset ICs, thereby reducing the customer's circuit board space, the number of installation components, and corresponding costs. In addition, customers who only use the reset function in MCU can use the real-time clock module RA8000CE reset function to add redundancy to their system.

Multi pin for convenient debugging and flexible interface configuration

For the convenience of engineers to use and debug, RA8000CE provides multiple interface options. Among them, EVIN1 and EVIN2 are external event input pins that can be set up or down by configuring resistors. SCL is the serial clock input pin, and SDA is the serial data input and output pin. FOUT is a frequency output pin that can choose to output a clock signal of 32.768 kHz (default value), 1024 Hz, or 1 Hz. INT is an interrupt output pin that can output interrupt signals for wake-up timer time updates, alarms, and/or event detection. These diverse pin choices provide engineers with great flexibility, allowing them to configure interfaces according to specific application requirements.

In summary, the RA8000CE real-time clock module has the characteristics of high precision, multifunctionality, and high stability, providing strong support for the design and development of automotive electronic devices. This module is undoubtedly a product worth paying attention to and using when engineers are developing and designing automotive electronics projects.