SY87701L(2000) 데이터 시트보기 (PDF) - Micrel
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SY87701L Datasheet PDF : 12 Pages
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Micrel
APPLICATION EXAMPLE
SY87701L
GND
Q1
R10
2N2222A
123456
VCC
(R17 - R22)
5kΩ x 6
LED
D2
R9
VCC
VCC
Capacitor Pads
(1206 format)
R1
R2
C1
RDIN
C2
R3
R4
See Table 1
GND
LOOP FILTER
NETWORK
REFCLK
(TTL)
NC
1 VCCA
2 LFIN
3 DIVSEL1
4 RDINP
5 RDINN
6 FREQSEL1
7 REFCLK
8 FREQSEL2
9 FREQSEL3
80Ω R5
C3
1.5µF
10 N/C
11 PLLSP
12 PLLSN
13 GND
14 GND
GND
VCC 28
CD 27
DIVSEL2 26
RDOUTP 25
RDOUTN 24
VCCO 23
RCLKP 22
RCLKN 21
VCCO 20
TCLKP 19
TCLKN 18
CLKSEL 17
PLLRP 16
PLLRN 15
Ferrite Bead
BLM21A102
VCC
Stand Off
0.1µF FB1 22µF 0.1µF 22µF
C9
C8
C7
C6
DIODE D1
1N4148
R7
VCC
R6 50Ω
C4
1.0µF
0.1µF
0.1µF
C14
C15
0.1µF
0.1µF
C16
C17
0.1µF
0.1µF
C18
C19
If VCC = +5V:
R9 through R14 = 330Ω
If VCC = +3.3V:
R9 through R14 = 220Ω
J1
R8
VCC
XTAL
Oscillator
14
1
0.1µF C13
8
7
120Ω
R23
VCC
C5
Pin 1 (VCCA)
0.1µF
C10
Pin 28 (VCC)
0.1µF
C11
Pin 23 (VCCO)
0.1µF
C12
Pin 20 (VCCO)
0.1µF
For AC coupling only
C1 = C2 = 0.1µF
R1 = R2 = 680Ω
R3 = R4 = 1kΩ
Table 1.
For DC mode only
C1 = C2 = Shorted
R1 = R2 = 130Ω
R3 = R4 = 82Ω
NOTE:
1. C5 and C10–C12 are decoupling capacitors and should be kept as close
to the power pins as possible.
8
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