Microchip MCP795WXX/BXX Real-Time Clock/Calendar Family

Microchip Technology rolled out their MCP795WXX/BXX family of stand-alone Real-Time Clock/Calendar (RTCC) devices. The MCP795WXX/BXX features a 10 MHz SPI interface, non-volatile memory, millisecond alarms, two event-detect inputs, three types of non-volatile memory, and automatic battery switchover. The Microchip MCP795WXX RTCC family is available now in 14-pin SOIC and TSSOP packages. The MCP795BXX RTCC devices will be available in mid-December in the same package options. Prices start at $1.18 each (10,000-unit quantities). The RTCC devices are ideal for smart-energy, home-appliance and communications applications.

Microchip Technology MCP795WXX/BXX family of stand-alone Real-Time Clock/Calendar (RTCC) devices

The Microchip MCP795WXX/BXX RTCC family includes a 10 MHz SPI interface that supports very fast data access, which results in longer MCU sleep and power-down modes, and less power draw from the battery. Other low-power features include two event-detect inputs that draw minimal current in the RTCC device, but wake the MCU when events such as a switch press or system tampering have occurred. The MCP795WXX/BXX also includes three types of non-volatile memory (EEPROM, SRAM and a Unique ID).

The new devices feature automatic battery switchover for backup power, a power-fail time stamp (logs the time and duration of any power failure), and a wide digital-trimming range that compensates for crystal frequency drift over temperature. In designs where a second low-frequency crystal is used, a boot-clock option provides a 32 kHz clock at power-up, reducing the need for a second crystal.

The Microchip MCP795WXX/BXX RTCC devices lower component counts and costs for applications. The new chips can be used in the smart-energy (thermostats, power meters and commercial refrigeration), home-appliance (coffee makers, stoves and microwave ovens), automotive (dashboard controls, car radios and GPS), consumer-electronic (office equipment and video systems), and communications (radios, cordless phones, and network systems) applications.

Device Family Interface SRAM EEPROM Unique ID Pin Count Additional Features Volume Pricing
MCP795B2X SPI 64 Bytes 2 Kbit 128 bits 14 Watchdog Timer, Event Detects (x2) Boot Clock @ Powerup 1.33
MCP795B1X SPI 64 Bytes 1 Kbit 128 bits 14 Watchdog Timer, Event Detects (x2) Boot Clock @ Powerup 1.27
MCP795W2X SPI 64 Bytes 2 Kbit 128 bits 14 Watchdog Timer, Event Detects (x2) 1.24
MCP795W1X SPI 64 Bytes 1 Kbit 128 bits 14 Watchdog Timer, Event Detects (x2) 1.18

More info: Microchip Technology