Description

The RS5C582C is a CMOS LSI that functions as a real-time clock for microcomputers. It offers various functions such as time, calendar, and alarm directly connected to the data bus of CPUs like 68000 and 8086. It is available in three different types of packages: DIP type, SOP type, and SSOP type. A built-in timer counter acts as a watchdog timer or interrupt timer.

Specifications and features

• Directly connected to CPU, enabling fast access
• 4bit bidirectional data bus and 4bit address bus
• The oscillator is driven by a constant voltage, so the oscillation frequency is stable even when the power supply voltage fluctuates
• Built-in timer counter using internal clock
• Generates cyclic CPU interrupts and generates alarm-match interrupts
• Interrupt flag and interrupt inhibit
• 12-or 24-hour mode is selectable
• Recognizes leap years automatically
• All clock and alarm data expressed in BCD codes
• ±30 seconds adjustment function
• Determines whether clock data is valid or invalid
• Consumes very low power due to CMOS technology, so it can be backed up by batteries
• Power supply voltage between 3.0 to 5.0V
• Time keeping supply voltage between 2.0 to 6.0V
• Package: 20pin SSOP for RS5C62

Application Scenarios

The RS5C582C is mostly used in electronic devices that require time-keeping and alarm functions. Some applications include digital watches, electronic calendars, and various types of consumer electronics.

Comparison

• Built-in timer counter acts as a watchdog timer or interrupt timer
• Generates cyclic CPU interrupts and generates alarm-match interrupts
• Consumes very low power due to CMOS technology, so it can be backed up by batteries

• Available only in one package type