ICS94201DFLFT IDT, Integrated Device Technology Inc, ICS94201DFLFT Datasheet - Page 9

• Manufacturer Part Number: ICS94201DFLFT
• Description: IC FREQ GENERATOR PROGR 56-SSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Frequency Generatorr

Specifications of ICS94201DFLFT

• Input: Crystal
• Output: Clock
• Frequency - Max: 500MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 56-SSOP
• Frequency-max: 500MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 94201DFLFT

Note:
1. User needs to ensure step 3 & 7 is carried out. Systems with the wrong spread percentage and/or group to group divider ratio
2. If VCO, REF divider values or phase detector stability are out of range, the device may fail to function correctly.
3. Follow min and max VCO frequency range provided. Internal PLL could be unstable if VCO frequency is too fast or too slow.
4. Users can also utilize software utility provided to program the VCO frequency from ICS Application Engineering.
5. Spread percent needs to be calculated based on VCO frequency, spread modulation frequency and spread amount desired.
Byte 16: Spread Sectrum Control Register
Note: Please utilize software utility provided by ICS
Byte 18: Output Dividers Control Register
Note: Changing bits in these registers results in frequency
Notes:
1. PWD = Power on Default
2. The power on default for byte 16-20 depends on the harware (latch inputs FS[0:4]) or IIC (Byte 0 bit [1:7]) setting. Be sure to read
0428B - 11/28/05
programmed into bytes 16-20 could be unstable. Step 3 & 7 assure the correct spread and gear ratio.
Use 14.31818MHz x VCO/REF divider values to calculate the VCO frequency (MHz).
See Application note for software support.
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
back and re-write the values of these 5 registers when VCO frequency change is desired for the first pass.
B
B
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
divider ratio changes. Incorrect configuration of
group gear ratio can cause system malfunction.
Application Engineering to configure spread spectrum.
Incorrect spread percentage may cause system failure.
6
4
2
0
6
4
2
0
7
5
3
1
7
5
3
1
P
P
W
W
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D
D
S
S
S
S
S
S
S
S
O
O
O
O
O
O
O
O
p
p
p
p
p
p
p
p
u
u
u
u
u
u
u
u
e r
e r
e r
e r
e r
e r
e r
e r
p t
p t
p t
p t
p t
p t
p t
p t
d a
d a
d a
d a
d a
d a
d a
d a
t u
t u
t u
t u
t u
t u
t u
t u
S
S
S
S
S
S
S
S
D
D
D
D
D
D
D
D
e p
e p
e p
e p
e p
e p
e p
e p
v i
v i
v i
v i
v i
v i
v i
v i
t c
t c
t c
t c
t c
t c
t c
t c
d i
d i
d i
d i
d i
d i
d i
d i
D
D
u r
u r
u r
u r
u r
u r
u r
u r
r e
r e
r e
r e
r e
r e
r e
r e
e
e
m
m
m
m
m
m
m
m
c s
c s
M
M
M
M
M
M
M
M
i B
i B
i B
i B
i B
i B
i B
i B
i r
i r
U
U
U
U
U
U
U
U
t p
t p
X
X
X
X
X
X
X
X
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
o i
o i
C
C
C
C
C
C
C
C
n
n
n o
n o
n o
n o
n o
n o
n o
n o
r t
r t
r t
r t
r t
r t
r t
r t
l o
l o
l o
l o
l o
l o
l o
l o
i B
i B
i B
i B
i B
i B
i B
i B
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
9
Note: Please utilize software utility provided by ICS
Byte 19: Output Dividers Control Register
Note: Changing bits in these registers results in frequency
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
Byte 17: Spread Spectrum Control Register
B
B
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
Application Engineering to configure spread spectrum.
Incorrect spread percentage may cause system failure.
divider ratio changes. Incorrect configuration of
group gear ratio can cause system malfunction.
7
6
5
4
3
2
0
7
6
5
4
3
2
0
1
1
P
P
W
W
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
D
D
S
S
S
S
S
D
D
D
O
O
O
O
O
O
O
O
p
p
p
p
p
v i
v i
v i
u
u
u
u
u
u
u
u
e r
e r
e r
e r
e r
p t
p t
p t
p t
p t
p t
p t
p t
d i
d i
d i
d a
d a
d a
d a
d a
t u
t u
t u
t u
t u
t u
t u
t u
r e
r e
r e
S
S
S
S
S
D
D
D
D
D
D
D
D
c
c
c
e p
e p
e p
e p
e p
n o
n o
n o
v i
v i
v i
v i
v i
v i
v i
v i
d i
d i
d i
d i
d i
d i
d i
d i
t c
t c
t c
t c
t c
r t
r t
r t
D
D
u r
u r
u r
u r
u r
r e
r e
r e
r e
r e
r e
r e
r e
l o
l o
l o
e
e
m
m
m
m
m
c s
c s
M
M
M
M
M
M
M
M
B
B
B
t i
t i
t i
i r
B
B
B
i B
i B
i r
U
U
U
U
U
U
U
U
6 2
5 2
4 2
ICS94201
t i
t i
t i
t p
t p
X
X
X
X
X
X
X
X
9 t
8 t
2 1
1 1
0 1
o i
o i
C
C
C
C
C
C
C
C
n
n
n o
n o
n o
n o
n o
n o
n o
n o
r t
r t
r t
r t
r t
r t
r t
r t
l o
l o
l o
l o
l o
l o
l o
l o
B
B
B
B
B
B
i B
i B
t i
t i
t i
t i
t i
t i
9 t
8 t
5 1
4 1
3 1
2 1
1 1
0 1