Clock Generator For PowerQUICC And PowerPC Microprocessors And Microcontrollers

The MPC9824 is a PLL based clock generator specifically designed for Free scale Microprocessor and Microcontroller applications including the PowerPC and Power QUICC. This device generates the microprocessor input clock and other microprocessor system and bus clocks at any one of eight output frequencies. These frequencies include 33, 50, 66, 100, 125, 133.33, 166.66 and 200 MHz. The device offers six low skew clock outputs plus the three reference outputs. The clock input reference is 25 MHz and may be derived from an external source of by the addition of a 25 MHz crystal to the on-chip crystal oscillator. The extended temperature range of the MPC9824 supports telecommunication and networking requirements. The MPC9824 uses a PLL with a 25 MHz input reference frequency to generate a single bank of 6 configurable LVCMOS output clocks. The output frequency of this bank is configurable by three FSEL pins. The 25 MHz reference may be either an external frequency source or a 25 MHz crystal. The 25 MHz crystal is directly connected to the XTAL_IN and XTAL_OUT pins with no additional components required. An external reference may be applied to the XTAL_IN pin with the XTAL_OUT pin left floating. The input reference, whether provided by a crystal or an external input is also directly buffered to a second bank of 3 LVCMOS outputs. These outputs may be used as the clock source for processor I/O applications such as an Ethernet PHY.

• 6 LVCMOS outputs for processor and other system circuitry
• 3 Buffered 25 MHz reference clock outputs
• Crystal oscillator or external reference input
• 25 MHz Input reference frequency
• Selectable output frequencies = 33.33, 50, 66.66, 100, 125, 133.33, 166.66, or 200 MHz
• Low cycle-to-cycle and period jitter
• Package = 32 lead LQFP
• 3.3 V supply
• Supports computing, networking, telecommunications applications
• Ambient temperature range -40°C to +85°C