Chrontel CH7219 Catatan Aplikasi - Halaman 2

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Halaman Cetak
CHRONTEL
Pin
2, 25, 41, 55
11, 42
18
21, 29
58, 59,65,66
1
12, 22, 28, 43, 62
Thermal pad
All the Ferrite Beads described in this document are recommended to have an impedance of less than
Note:
0.05Ω at DC; 23Ω at 25MHz & 47Ωat 100MHz. Refer to Fair Rite part #2743019447 for details (an equivalent
part can be used for the diagram).
2.1.3
On chip power-on reset function's sequence
The power supply must be valid and stable at least 9ms before RB signal become invalid.
Power supply
(3.3V and 1.2V)
2
# of Pins
Type
4
Power
2
Power
1
Power
2
Power
4
Power
1
power
6
Ground
U1
2, 25, 41, 55
AVCC
C1
C2
0.1uF
0.1uF
11, 42
DVDD
C6
C7
12, 43
0.1uF
0.1uF
DGND
69
Thermal Pad
C9
18
0.1uF
AVDDPLL
QFN
21, 29
VDDS
C11
CH7219
0.1uF
0.1uF
22, 28
GNDS
C21
1
0.1uF
VDDPLL
58,59, 65,66
AVDD
C14
C15
C16
0.1uF
10nF
1nF
C24
C23
C25
62
0.1uF
10nF
1nF
AGND
Figure 1: Power Supply Decoupling and Distribution
T1>9ms
RB
Figure 2: Power on and RB timing
Symbol
Description
AVCC
Analog supply voltage (3.3V)
DVDD
Digital supply voltage (1.2V)
AVDDPLL
PLL supply voltage (1.2V)
VDDS
Serializer supply voltage (1.2V)
AVDD
Analog supply voltage (1.2V)
VDDPLL
Analog supply voltage (1.2V)
GND
Power ground
VCC3_3
47R 100MHz
L1
1
2
C5
VCC1_2
C3
C4
47R 100MHz
0.1uF
0.1uF
10uF
L2
1
2
C8
10uF
47R 100MHz
C10
L3
1
2
10uF
47R 100MHz
L4
1
2
C13
C12
10uF
C22
L5 47R 100MHz
1
2
10uF
L6 47R 100MHz
1
2
C20
C17
C18
C19
10uF
0.1uF
10nF
1nF
C26
C27
C28
0.1uF
10nF
1nF
206-1000-058
AN-B058
Rev. 0.1
2023-10-25