21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6CX100-35
35 MHz 3.3V VCXO
for xDSL Applications
Product Features
3.3V operating voltage
Uses an inexpensive external crystal
On-chip VCXO with pull range of 240ppm
VCXO tuning voltage from 0 to 3.3V
10mA output drive at CMOS levels
Available in SOIC package
Product Description
The PI6CX100-35 is a low-cost, high-performance 3.3V VCXO,
designed to replace expensive VCXO modules. The on-chip Voltage
Controlled Crystal Oscillator accepts a 0 to 3.3V input voltage to
cause clocks to vary by
±120ppm.
This device uses an inexpensive
external pullable crystal at 35 MHz to produce the same output
frequency.
The PI6CX100-35 is designed for xDSL applications.
Logic Block Diagram
V
IN
Product Pin Configuration
X1
Output
Buffer
Voltage
Controlled
Crystal
Oscillator
CLKOUT
1
W
8
X2
NC
VDD
CLKOUT
NC
VIN
GND
2
8-Pin
7
3
4
6
5
X1
X2
Pin Description
Pin Name
X1, X2
NC
V
IN
GND
CLKOUT
V
DD
Note:
1. 0.1µF or 0.01µF bypass capacitor is required.
Pin Numbe r
1, 8
2, 7
3
4
5
6
Type
I
I
PWR
O
PWR
De s cription
Crystal Connection
No Connect
Voltage Input to VCXO
Ground
Clock Output
Power Supply
(1)
1
PS8577
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6CX100-35
35 MHz 3.3V VCXO
for xDSL Applications
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines,
not tested.)
Storage Temperature .........................................55°C to 125°C
Ambient Temperature .........................................40°C to 85°C
Supply Voltage V
DD
................................................ 0.5V to 7V
Inputs/Outputs Voltage .............................. 0.5V to V
DD
+0.5V
Output Current .................................................................10mA
Soldering Lead Temperature (10s) .................................... 260°C
Junction Temperature ........................................ 50°C to 150°C
Note:
Stresses greater than those listed under MAXIMUM RATINGS
may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
DC Electrical Characteristics
(Unless otherwise specified, V
DD
= 3.3V, f
O
= 35.328 MHz, V
IN
= 1.65V, Load = 15pF, T
A
= 25
o
C)
Symbol
V
DD
V
OH
V
OL
I
OH
I
OL
I
DD
I
OZ
R
S
f
O
C
L
D e s cription
O perating Voltage
O utput High Voltage
O utput Low Voltage
O utput High Current
O utput Low Current
Supply Current
O utput O ff- leakage
Negative Resistance
Input Frequency
O utput Load Capacitance
V
IN
= 0V
80
35
15
30
I
OH
= 12mA
I
OL
= 12mA
V
OH
= V
DD
0.5V
V
OL
= 0.5V
C
L
= 15pF
4
11
12
6
10
µA
Ω
MHz
pF
Te s t Condition
M in.
3.135
2.8
0.5
4
mA
Typ.
3.3
M ax.
3.465
V
Units
AC Electrical Characteristics
(Unless otherwise specified, f
O
= 35.328 MHz, Load = 15pF, T
A
= 25
o
C)
Symbol
T
r
/ T
f
T
d
T
j
∆f
Lin
D e s cription
Rise / Fall Time
Duty Cycle
Cycle- to- Cycle Jitter
Pull Range
Linearity
O scillator start time
0.5V
DD
C
L
= 15pF
V
IN
= 0 V
DD
V
IN
= 0.1V
DD
0.9V
DD
V
DD
= 0.9V
DD
trigger
Te s t Condition
0.1V
DD
0.9V
DD
45
50
±120
±10
1.5
10
M in.
Typ.
1.5
M ax.
6
55
Units
Ns
%
ps
ppm
%
ms
2
PS8577
10/04/01
f (ppm)
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6CX100-35
35 MHz 3.3V VCXO
for xDSL Applications
Pullability Characteristics
160
140
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
0.0
0.5
1.0
1.5
Vc (V)
2.0
2.5
3.0
3.5
ATS
. . . . . . UM-5
Recommended Crystal Specifications
D e s cription
Mode of O scillation
Frequency Range
Frequency Tolerance
Temperature plus Aging Stability
O perating Temperature
C0 / C1
Load Capacitance (C
L
)
Equivalent Series Resistance (ESR)
Crys tal
Fundamental
35.328 MHz
±20ppm
±50ppm
20°C to +70°C
240 (max.)
17pF
35 ohms (max.)
Measurement Circuit
X1
NC
VIN
VIN
GND
X2
NC
VDD
CLKOUT
0.01µF
C
L
= 15pF
3.3V
Note:
1. 0.1µF or 0.01µF bypass capacitor is required.
2. Crystal frequency is 35.328 MHz.
3
PS8577
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI6CX100-35
35 MHz 3.3V VCXO
for xDSL Applications
Plastic 8-pin SOIC Package
8
.149
.157
3.78
3.99
4.80 .189
5.00 .196
1
.016
REF
.026
0.406
0.660
.053
.068
1.35
1.75
.0099
.0196
0.25
x 45˚
0.50
SEATING PLANE
0-8˚
.0075
.0098
0.40 .016
1.27 .050
.2284
.2440
5.80
6.20
0.19
0.25
.050
BSC
1.27
.013
.020
0.330
0.508
X.XX
X.XX
.0040 0.10
.0098 0.25
DENOTES DIMENSIONS
IN MILLIMETERS
Ordering Information
Orde ring Code
PI6CX100- 35W
Package Name
W8
Package Type
8- pin 150- mil SOIC
Ope rating Range
Industrial
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8577
10/04/01
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