mpc9817 Integrated Device Technology, mpc9817 Datasheet - Page 3

• Manufacturer Part Number: mpc9817
• Description: Clock Generator For Powerquicc And Powerpc Microprocessors And Microcontrollers
• Manufacturer: Integrated Device Technology

IDT™ Clock Generator for PowerQUICC and PowerPC Microprocessors and Microcontrollers
Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc
MPC9817
Clock Generator for PowerQUICC and PowerPC Microprocessors and Microcontrollers
Advanced Clock Drivers Devices
Freescale Semiconductor
Crystal Oscillator
to minimize system implementation costs. Other than the
addition of a 25-MHz crystal, no external components are
required.The crystal selection should be: 25 MHz, parallel
resonant type with a load specification of C
with a load specification of C
Power Supply Bypassing
0.01 capacitors and a minimum of one 1.0 capacitor for the
overall package. All capacitors should be located as close to
the SSOP pins as possible.
The MPC9817 features a fully integrated Pierce oscillator
The MPC9817 should have all V
L
= 20 pF may be used, however,
Figure 2. MPC9817 20-Lead SSOP Package Pinout (Top View)
Table 3. Crystal Specifications
Crystal Cut
Resonance
Shunt Capacitance (C
Load Capacitance (C
Equivalent Series Resistance (ESR)
DD
pins bypassed with
XTAL_OUT
L
= 10 pF. Crystals
XTAL_IN
QREF2
QREF1
QREF0
FSEL0
FSEL1
Parameter
GND
V
V
DD
DD
MPC9817 OPERATION
O
L
)
)
1
2
3
4
5
6
7
8
9
10
3
the reference frequency may be higher than the specified
25 MHz. Externally supplied capacitors on both the XTAL_IN
and XTAL_OUT pins may be used to trim the frequency as
desired.
XTAL_IN and XTAL_OUT pins as possible to avoid any board
level parasitic.
External Clock Source
the XTAL_IN pin. In this mode of operation, the XTAL_OUT
pin should be left floating.
Fundamental AT Cut
Parallel Resonance
5–7 pF
10 pF
20–60 Ω
The crystal should be located as close to the MPC9817
An external reference source of 25 MHz may be applied to
20
19
18
17
16
15
14
13
12
11
Value
V
QA4
QA3
GND
QA2
QA1
V
QA0
MR/OE
GND
DD
DD
MPC9817
NETCOM
MPC9817
3