PT7C4302 Overview
Description
The PT7C4302 serial real-time clock is a lowpower clock/calendar with a programmable square-wave output and 31 bytes of nonvolatile RAM. Address and data are transferred serially via a 3wire bus.
Key Features
- Using external 32.768kHz quartz crystal
- 31-byte, nonvolatile (NV) RAM for data storage
- Time keeping voltage: 1.5V to 5.5V
- Uses less than 300nA at 2.0V
- Simple 3-wire interface
- Serial I/O for minimum pin count
- Burst mode for reading/writing successive addresses in clock/RAM
- TTL-compatible (VCC = 5V)
- Optional industrial temperature range: -40°C to +85°C
- Battery backup
