SY87701VZCTR Просмотр технического описания (PDF) - Micrel
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SY87701VZCTR Datasheet PDF : 15 Pages
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Micrel, Inc.
28-PIN APPLICATION EXAMPLE
SY87701V
123456
VCC
(R17 - R22)
5kΩ x 6
R8
130Ω
LED
D2
GND
Capacitor Pads
VCC
(1206 format)
R1
R2
C1
RDIN
C2
R3
R4
See Table 1
GND
1 VCCA
2 LFIN
3 DIVSEL1
4 RDINP
5 RDINN
6 FREQSEL1
7 REFCLK
8 FREQSEL2
9 FREQSEL3
LOOP FILTER
NETWORK
REFCLK
(TTL)
NC
80Ω R5
C3
1.5 F
10 N/C
11 PLLSP
12 PLLSN
13 GND
14 GND
GND
XTAL
Oscillator
14
1
0.1 F C13
VCC
8
7
120Ω
R21
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
0.1 F FB1 22 F 0.1 F 22 F
C9
C8
C7
C6
0.1 F
0.1 F
C14
C15
J1
VCC
R7 Diode D1
1kΩ 1N4148
0.1 F
0.1 F
C16
C17
R6 50‰
C4
1.0 F
0.1 F
0.1 F
C18
C19
If VCC = +5V:
R9 through R14 = 330Ω
If VCC = +3.3V:
R9 through R14 = 220Ω
VCC
C5
0.1 F
C10
0.1 F
C11
0.1 F
C12
0.1 F
Pin 1 (VCCA)
Pin 28 (VCC)
Pin 23 (VCCO)
Pin 20 (VCCO)
Note 1. C5 and C10–C12 are decoupling capacitors and should be kept
as close to the power pins as possible.
For AC-Coupling Only
when VCC = +5V
when VCC = +3.3V
C1 = C2 = 0.1µF
C1 = C2 = 0.1µF
R1 = R2 = 1.2kΩ
R1 = R2 = 680Ω
R3 = R4 = 3.4kΩ
R3 = R4 = 1kΩ
Table 1.
For DC Mode Only
when VCC = +5V
when VCC = +3.3V
C1 = C2 = Shorted
C1 = C2 = Shorted
R1 = R2 = 82Ω
R1 = R2 = 130Ω
R3 = R4 = 130Ω
R3 = R4 = 82Ω
M9999-073008
hbwhelp@micrel.com or (408) 955-1690
11
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