SKY72300-21 Skyworks Solutions Inc, SKY72300-21 Datasheet - Page 13

• Manufacturer Part Number: SKY72300-21
• Description: IC SYNTHESIZER 2.1GHZ 28-EPTSSOP
• Manufacturer: Skyworks Solutions Inc
• Type: Fractional N Synthesizerr

Specifications of SKY72300-21

• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: Yes/Yes
• Frequency - Max: 2.1GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.7 V ~ 3.3 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Frequency-max: 2.1GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 863-1076-2

Table 4. Multiplexer Output
Main Synthesizer
the size of the main
power consumption, and on the level of fractionality and step
size. When this bit is cleared, the main
with a fractionality of 218 and a step size of F
When this bit is set, the main
fractionality of 210 and a step size of F
Auxiliary Synthesizer Power Down = One-bit flag to power down
the auxiliary synthesizer. When this bit is cleared, the auxiliary
synthesizer is powered up. When this bit is set, the auxiliary
synthesizer is in power-down mode.
Auxiliary Synthesizer Mode = One-bit flag to power down the
auxiliary synthesizer’s
operate as an integer-N synthesizer. When this bit is cleared,
the auxiliary synthesizer is in fractional-N mode. When this bit is
set, the auxiliary synthesizer is in integer-N mode.
Multiplexer Output Select
(Bit 8)
0
0
0
0
1
1
1
1
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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A3
0
A2
Fractionality = One-bit flag to configure
1
modulator. This has a direct effect on
A1
modulator and fractional unit to
1
A0
1
Multiplexer Output Select
Figure 13. Power Down and Multiplexer Output Register (Write Only)
modulator is 10-bit with a
11
X
ref_main
10
(Bit 7)
X
0
0
1
1
0
0
1
1
modulator is 18-bit
/1024.
9
ref_main
MSB
8
/262144.
7
LSB
6
Multiplexer Output Select
5
4
(Bit 6)
NOTE: There are no special power-up sequences required for the
Refer to Table 4 for more information.
0
1
0
1
0
1
0
1
Multiplexer Output Selection = Three-bit value that selects
which internal signal is output to the Mux_out pin. The following
internal signals are available on this pin:
Mux_out Pin Tri-State Enable = One-bit flag to tri-state the
Mux_out pin. When this bit is cleared, the Mux_out pin is
enabled. When this bit is set, the Mux_out pin is tri-stated.
3
Reference oscillator: F
Main or auxiliary divided reference (post-reference frequency
main or auxiliary dividers): F
Main or auxiliary phase detector frequency (post-main or
auxiliary frequency dividers): F
Serial data out for loop-back and test purposes
2
SKY72300-21.
1
DATA SHEET • SKY72300-21 FREQUENCY SYNTHESIZER
0
Reference Oscillator
Auxiliary Reference Frequency (F
Main Reference Frequency (F
Auxiliary Phase Detector Frequency (F
Main Phase Detector Frequency (F
Serial data out
Serial interface test output
Unused
Full Power Down
Main Synthesizer Power Down
Main Synthesizer Mode
Main Synthesizer ΔΣ Fractionality
Auxiliary Synthesizer Power Down
Auxiliary Synthesizer Mode
Multiplexer Output Selection
Mux_out Pin Tri-State Enable
ref
Multiplexer Output
ref_main
pd_main
(Mux_out)
or F
or F
ref_main
ref_aux
ref_aux
C1424
pd_aux
pd_main
)
)
pd_aux
)
)
13