MICROCHIP
芯片, 实时时钟, 带存储器, SRAM, 64B, SOIC-8
STMICROELECTRONICS
芯片, 实时时钟, 串行口, 8-SO, 卷装
芯片, 实时时钟, I2C, 56B NVRAM, 8-SO, 卷装