CY24488

The CY24488 generates up to three independent clock frequencies, plus a buffered copy of the reference crystal frequency, from a single crystal or reference input. Five clock output pins are available, which allows some frequencies to be driven on two or more output pins. Outputs can also be individually enabled or disabled. When a CLK output is individually disabled, it drives low.

The analog voltage CY24488 controlled crystal oscillator (VCXO) allows the user to "pull" the reference crystal to a frequency that is slightly higher or lower than nominal. Doing so will cause all output clocks to shift by an equivalent parts-per-million (PPM).The VCXO is controlled by the analog control voltage applied to the VIN pin. For applications that do not require the VCXO functionality, it can be disabled.

A serial programming interface (SPI) CY24488 permits in-systemconfiguration of the device by writing to internal registers. It is used to set the output frequencies, enable and disable outputs,enable and disable the VCXO feature, etc. The SPI provides volatile programming. When powered down, the device reverts to its pre-SPI state. When the system is powered back up, the SPI registers will need to be configured again. Specific configuration details are given later in this data sheet.

Customers CY24488 may contact their Cypress FAE or salesperson for any frequency that is not listed in this data sheet. The data sheet can be updated with a new hex code for the requested frequency.