MOTOROLA MPC9108 Multiple output clock synthesizer Datasheet

SEMICONDUCTOR TECHNICAL DATA
The MPC9108 is a multiple CMOS output clock synthesizer targeted
for disk drive applications. The device interfaces to a 20MHz crystal as its
frequency source. From this source the device provides a buffered copy
of the 20MHz clock as well as synthesized 40MHz and 50MHz output
clocks.
•
•
•
•
MULTIPLE OUTPUT
CLOCK SYNTHESIZER
Fully Integrated PLL
Fully Integrated Crystal Oscillator
Low cost, low jitter design
Low cost 8–lead SOIC packaging
In addition to the output clock frequencies, the MPC9108 also offers a
lock indicator output. When the internal PLL achieves phase and
frequency lock the CLK_LOCK signal will go HIGH. The pin will remain
HIGH unless the PLL loses lock due to input clock or power supply
disturbances.
The XTALIN pin (pin 1) can be over–driven with a standard 5V CMOS
signal. When an externally generated reference is used the XTALOUT pin
should be left open.
The MPC9108 operates from a 5.0V supply across the commercial
temperature range of 0°C to 70°C. The 8–lead SOIC package is used to
optimize board space efficiency as well as minimizing cost.
D SUFFIX
PLASTIC SOIC
CASE 751–03
Pinout: 8–Lead SOIC
(Top View)
XTALIN
1
8
XTALOUT
VDD
2
7
CLK_LOCK
GND
3
6
CLK2
CLK1
4
5
CLK3
Pin Descriptions
Pin Name
Pin Number
I/O
Function
XTALIN
1
I
20MHz Crystal Connection, External Reference Point
VDD
2
–
+5V Power Supply
GND
3
–
Ground
CLK1
4
O
20MHz Output, Buffer Xtal Output
CLK2
5
O
50MHz Output, PLL Controlled
CLK3
6
O
40MHz Output, PLL Controlled
CLK_LOCK
7
O
HIGH When PLL is Locked
XTALOUT
8
O
Crystal Oscillator Connection
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
1/97
 Motorola, Inc. 1997
1
REV 0
MPC9108
BLOCK DIAGRAM
1
Xtal
Osc
CLK1
8
PLL
200MHz
÷4
CLK3
÷5
CLK2
CLK_LOCK
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
–0.5 to +7.0
V
VIN
Input Voltage
–0.5 to +7.0
V
TA
Operating Temperature Range (In Free-Air)
0 to +70
°C
TA
Ambient Temperature Range (Under Bias)
–55 to +125
°C
TSTG
Storage Temperature Range
–65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the
Recommended Operating Conditions.
DC CHARACTERISTICS (0°C < TA < 70°C; VDD = 5V ±10%; Unless Otherwise Stated)
Symbol
Characteristic
Min
Typ
Max
Unit
Condition
0.8
V
VDD = 5V
V
VDD = 5V
–5
µA
VIN = 0.5V
VIL
Input Low Voltage
VIH
Input High Voltage
IIL
Input Low Current
IIH
Input High Current
5
µA
VIN = VDD
VOL
Output Low Voltage
CLKn
0.4
V
IOL = 4mA
VOL
Output Low Voltage
CLK_LOCK
0.4
V
IOL = 10mA
VOH
Output High Voltage
V
IOH = –30mA
IDD
Supply Current
FD
Output Frequency Change Over Supply & Temp
ISC
Short Circuit Current
CI
Input Capacitance
2.0
0.8VDD
25
40
0.002
0.01
40
10
CL
Xtal Load Capacitance
1. All clocks operating at highest frequencies.
MOTOROLA
25
20
2
mA
%
No Load; Note 1.
With Respect to Typ Freq
mA
Each Output Clock
pF
Except X1, X2
pF
Pins X1, X2
TIMING SOLUTIONS
BR1333 — REV 5
MPC9108
AC CHARACTERISTICS (0°C < TA < 70°C; VDD = 5V ±10%; Unless Otherwise Stated)
Symbol
Characteristic
Min
Typ
Max
Unit
tICr
Input Clock Rise Time
20
ns
tICf
Input Clock Fall Time
20
ns
tr
Output Rise Time
tr
Rise Time
tf
Output Fall Time
tf
Fall Time
dt
Duty Cycle
fi
Input Frequency
tjab
Jitter Absolute
tlock
Output Lock Time
TIMING SOLUTIONS
BR1333 — REV 5
Condition
0.8 to 2.0V
1.0
2.0
ns
30pf Load
20% to 80% VDD
2.0
4.0
ns
30pf Load
2.0 to 0.8V
1.0
2.0
ns
30pf Load
20% to 80% VDD
2.0
4.0
ns
30pf Load
48/52
55/45
%
30pf Load
Pins 4, 6, 5
45/55
Pins 4, 6, 5
–500
20
0.02
3
3.0
MHz
500
ps
4.0
ms
MOTOROLA
MPC9108
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751–05
ISSUE R
D
A
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETERS.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
C
8
5
0.25
H
E
M
B
M
1
4
h
B
X 45 _
e
q
A
C
SEATING
PLANE
L
0.10
A1
B
0.25
M
C B
S
A
S
DIM
A
A1
B
C
D
E
e
H
h
L
q
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.18
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0_
7_
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MOTOROLA
◊
4
MPC9108/D
TIMING SOLUTIONS
BR1333 — REV 5
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