MPC9817EN
MPC9817EN Datasheet
MPC9817
| Part | Datasheet |
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MPC9817EN |
MPC9817EN (pdf) |
| Related Parts | Information |
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MPC9817ENR2 |
MPC9817ENR2 |
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| Freescale Semiconductor Technical Data and PowerPC Microprocessors and DATAMPSCH9E81E7T MPC9817 MPC9817 The MPC9817 is a PLL-based clock generator specifically designed for Freescale Semiconductor Microprocessor and Microcontroller applications including the PowerPC and PowerQUICC. This device generates the microprocessor input clock and other microprocessor system and bus clocks at any one of four output frequencies. These frequencies include the popular 33- and 66-MHz PCI bus frequencies. The device offers five low-skew clock outputs plus three reference outputs. The clock input reference is 25 MHz and may be derived from an external source or by the addition of a 25-MHz crystal to the on-chip crystal oscillator. The extended temperature range of the MPC9817 supports telecommunication and networking requirements. • 5 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 include 25, 33, 50, or 66 MHz • Low cycle-to-cycle and period jitter • Package 20-lead SSOP • 3.3-V supply • Supports computing, networking, and telecommunications applications • Ambient temperature range to +85°C MICROPROCESSOR CLOCK GENERATOR SD SUFFIX 20 SSOP PACKAGE CASE 1461-01 EN SUFFIX 20 SSOP PACKAGE Pb-FREE PACKAGE CASE 1461-01 Functional Description The MPC9817 uses a PLL with a 25-MHz input reference frequency to generate a single bank of five configurable LVCMOS output clocks. The output frequency of this bank is configurable to either 25, 33, 50, or 66 MHz by two 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 three LVCMOS outputs. These outputs may be used as the clock source for processor I/O applications such as an Ethernet PHY. When FSEL0 and FSEL1 are both configured low, the QA outputs are directly fed from the input reference providing a total of eight low-skew 25-MHz outputs. For all other combinations of FSEL0 and FSEL1 the single-ended LVCMOS outputs provide five low-skew outputs for use in driving a microprocessor or microcontroller clock input as well as other system components. The MPC9817 is packaged in a 20-lead SSOP package. IDT Clock Generator for PowerQUICC and PowerPC Microprocessors and Microcontrollers h2a0s04b.eAenll raicgqhutsirreedsbeyrvIendte. grated Device Technology, Inc 1 MPC9817 MPC9817 Clock Generator for PowerQUICC and PowerPC Microprocessors and Microcontrollers XTAL_IN OSC XTAL_OUT PLL 400 MHz FSEL0 FSEL1 33,50,66 MHz Data Generator 25 MHz MR/OE NETCOM QA0 QA1 QA2 QA3 QA4 QREF0 QREF1 QREF2 Figure MPC9817 Logic Diagram Table Pin Configurations Pin QA0, QA1, QA2, QA3, QA4 QREF0, QREF1, QREF2 XTAL_IN XTAL_OUT FSEL0, FSEL1 MR/OE VDD GND I/O Output Input Output Input Type LVCMOS Function Clock Outputs Reference Output 25 MHz Crystal Oscillator Input Pin Crystal Oscillator Output Pin Configures Bank A Clock Output Frequency pull-up Enables All Outputs pull-down 3.3-V Supply Ground Table Function Table Control FSEL0,FSEL1 Default 11 25 MHz fed directly from reference input, PLL disabled |
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