CY23FS08OXI Cypress Semiconductor Corp, CY23FS08OXI Datasheet - Page 7

• Manufacturer Part Number: CY23FS08OXI
• Description: IC CLK ZDB 8OUT 200MHZ 28SSOP
• Manufacturer: Cypress Semiconductor Corp
• Type: Fanout Distribution, Multiplexer , Zero Delay Bufferr
• Series: Failsafe™r

Specifications of CY23FS08OXI

• Number Of Circuits: 1
• Package / Case: 28-SSOP
• Pll: Yes with Bypass
• Input: LVCMOS, LVTTL, Crystal
• Output: LVCMOS
• Ratio - Input:output: 3:8
• Differential - Input:output: No/No
• Frequency - Max: 166.7MHz
• Divider/multiplier: No/No
• Voltage - Supply: 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Frequency-max: 200MHz
• Maximum Input Frequency: 166.7 MHz
• Minimum Input Frequency: 1.04 MHz
• Output Frequency Range: 1.7 MHz to 166.7 MHz
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document #: 38-07518 Rev. *C
XTAL Selection Criteria and Application Example
Choosing the appropriate XTAL will ensure the FailSafe device
will be able to span an appropriate frequency of operation.
Also, the XTAL parameters will determine the holdover
frequency stability. Critical parameters are as follows. Our
recommendation is to choose:
Note:
5. The above example shows the maximum range the FailSafe internal capacitor array is capable of (0 to 48.6 pF).Cypress recommends the min./max capacitor
• Low C0/C1 ratio (240 or less) so that the XTAL has enough
• Low temperature frequency variation
• Low manufacturing frequency tolerance
• Low aging.
Example:
range of pullability.
array values be programmed to a narrower range such as 6 pF–30 pF, or 7.5 pF–27 pF. This ensures the XTAL operates between series resonance and
anti-resonance. Please contact Cypress for choosing these range settings.
[5]
-100.00
-200.00
-300.00
-400.00
Clmin = (12 pF IC input cap + 0 pF pulling cap+ 6 pF trace cap on board)/2 = 9 pF
Clmax = (12 pF IC input cap + 48 pF pulling cap+ 6 pF trace cap on board)/2 = 33 pF
Pull Range =(fClmin–fClmax)/fClmin = ((C1)/2)[(1/(C0+Clmin))–(1/(C0+Clmax))]
Pull Range in ppm
400.00
300.00
200.00
100.00
0.00
6
8 10 12 14 16 18 20 22 24 26 28 30 32 34
Figure 8. Frequency vs. Cload Behavior for Example XTAL
Pullability Range Vs. Cload
(Normalized to 14pF Cload)
= ((C1)/2)[(1/(C0+Clmin))–(1/(C0+Clmax))] × 10
Cload (pF)
C0 is the XTAL shunt capacitance (3 pF–7 pF typ.).
C1 is the XTAL motional capacitance (10 fF–30 fF typ).
The capacitive load as “seen” by the XTAL is across its
terminals. It is named Clmin (for minimum value), and Clmax
(for maximum value).These are used for calculating the pull
range.
Please note that the Cl range “center” is approximately 20 pF,
but we may not want a XTAL calibrated to that load. This is
because the pullability is not linear, as represented in the
equation above. Plotting the pullability of the XTAL shows this
expected behavior as shown in Figure 8. In this example,
specifying a XTAL calibrated to 14 pF load provides a
balanced ppm pullability range around the nominal frequency.
6
C0/C1 = 200
C0/C1 = 300
C0/C1 = 400
CY23FS08
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