CY22800FXC-025A Cypress Semiconductor Corp, CY22800FXC-025A Datasheet - Page 2

• Manufacturer Part Number: CY22800FXC-025A
• Description: IC PROG CLOCK GEN 8-SOIC
• Manufacturer: Cypress Semiconductor Corp
• Type: Clock Generatorr

Specifications of CY22800FXC-025A

• Input: Crystal or Other
• Output: LVCMOS
• Frequency - Max: 27MHz
• Voltage - Supply: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 27MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 428-1834

General Description
The CY22800 is a multi-function clock generator that supports
various applications in consumer and communications markets.
The device uses the Cypress proprietary PLL along with Spread
Spectrum and VCXO technology to make it one of the most
versatile clock synthesizers in the marketplace. The CY22800 is
a field-programmable synthesizer that can be programmed using
an easy-to-use programmer dongle, CY36800, with one of many
predefined configuration files for fast sample generation of
prototype builds. The CY22800 is a reprogrammable device that
can be programmed up to 100 times. The latest configurations
available for this device are summarized in
Spread Spectrum Clock Generation (SSCG)
The CY22800 can generate Spread Spectrum Clocks (SSCG) to
reduce EMI found in today’s high-speed digital electronic
systems.
The device uses proprietary Spread Spectrum Clock (SSC)
technology to synthesize and modulate the frequency of the
input clock. By modulating the frequency of the clock, the
measured EMI at the fundamental and harmonic frequencies is
greatly reduced. This reduction in radiated energy can signifi-
cantly reduce the cost of complying with regulatory agency
(EMC) requirements and improve time to market without
degrading system performance.
The CY22800 uses a preprogrammed configuration of memory
arrays to synthesize output frequency and offers eight different
spread percentages (refer to
-022), and an additional option to turn the spread on and off.
For the above-mentioned configurations, the modulation
frequency varies with the reference frequency as follows:
Table 2. CY22800 Configurations
Document #: 001-07704 Rev. *C
Commercial Temperature Range
CY22800-001A X2 Multiplier
CY22800-002A X3 Multiplier
CY22800-003A X4 Multiplier
CY22800-004A X5 Multiplier
CY22800-005A X6 Multiplier
CY22800-006A X8 Multiplier
CY22800-007A Clock multiplier for consumer & communication applications
CY22800-008A Clock multiplier for consumer & communication applications
Note
2. Fixed CLKIN/Xtal frequency. Refer to the one page data sheet corresponding to the Code # for detailed input and output ranges.
f
Code #
mod
=
1000
f
ref
Table 2
Code name
– Code numbers -015 to
Table
2.
CLKIN: 0.5–100
XTAL: 8–30
CLKIN: 0.5–66.66
XTAL: 8–30
CLKIN: 0.5–50
XTAL: 8–30
CLKIN: 0.5–40
XTAL: 8–30
CLKIN: 0.5–33.33
XTAL: 8–30
CLKIN: 0.5–25
XTAL: 8–25
14.318
14.318
Input Freq. (MHz)
VCXO
One of the key components of the CY22800 device is the VCXO.
The VCXO is used to “pull” the reference crystal higher or lower
in order to lock the system frequency to an external source. This
is ideal for applications where the output frequency needs to
track along with an external reference frequency that is
constantly shifting.
A special pullable crystal must be used in order to have adequate
VCXO pull range. Pullable Crystal specifications are included in
this data sheet.
VCXO Profile
Figure 2
The analog voltage input is on the X-axis and the PPM range is
on the Y-axis. An increase in the VCXO input voltage results in a
corresponding increase in the output frequency. This has the
effect of moving the PPM from a negative to positive offset.
Figure 2. VCXO Profile
[2]
[2]
-100
-150
-200
200
150
100
-50
50
0
0
shows an example of what a VCXO profile looks like.
0.5
CLKA: 1–200 or REFOUT
CLKA: 1.5–200 or REFOUT
CLKA: 2–200 or REFOUT
CLKA: 2.5–200 or REFOUT
CLKA: 3–200
CLKB: REFOUT
CLKA: 4–200
CLKB: REFOUT
CLKA: 33.33, 66.66, 50, 75, 80, 100, 133.33
See D/S
CLKA: 12, 24, 48, 60, 62.5, 106.25, 125
See D/S
1
Output Freq. (MHz)
VCXO input [V]
1.5
2
2.5
CY22800
3
Page 2 of 10
SS
N
N
N
N
N
N
N
N
3.5
VCXO
N
N
N
N
N
N
N
N
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