GS4915 Datasheet, PDF (22/27 Pages) Gennum Corporation – ClockCleaner™

4. Typical Application Circuit
3V3_A
SE_VDD (1V8_D or 3V3_D)
1V8_D
1V8_A
C1
10u
GND_A
C2
10u
GND_D
C3
10u
GND_D
C10
100n
GND_A
Pin 1
C11
100n
GND_D
Pin 23
C5
100n
C6
100n
GND_D
GND_D
Pin 25
Pin 15
C4
10u
GND_A
C12
100n
C7
100n
C8
100n
C9
100n
GND_A
Pin 3
GND_A
Pin 7
GND_A
Pin 27
GND_A
Pin 32
VCO_VDD
C14 100n
C16
1u
C17 10n
VCO_GND
R4
10K
VCO_VDD
R1
150K
R2
150K
VCO_GND
VCO_GND
R3*
C13*
VCO_VDD
VCO_GND
5 _VCTR
6 _GND
7 _VCC
C15
100n
VCO_GND
U1
GO1555
NC ³
GND ²
O/P ¹
VCO_GND
* See Table 3-1: Loop Filter Component Values
VCO_GND
to select these values.
VCO_GND
PCLKIN+
PCLKIN-
CLKIN_SE
RESET
100n
C18
C19
100n
R5
100R
GND_A
3V3_A
1V8_A
1V8_A
1 _{REG_VDD (3.3)}
2 _AGND
3 _{PD_VDD (1.8)}
4 _CLKIN
5 _CLKIN
6 _AGND
7 _{IN_VDD(1.8)}
8 _{CLKIN_SE}
9 _AGND
10 _RESET
GND_PAD
U2
GS4915
GND_A
AGND ³⁰
CLKOUT ²⁹
CLKOUT ²⁸
DIFF_OUT_VDD(1.8) ²⁷
AGND ²⁶
D_VDD (1.8) ²⁵
CLKOUT_SE ²⁴
SE_VDD (1.8 or 3.3) ²³
GND ²²
LOCK ²¹
1V8_A
1V8_D
SE_VDD
GND_D
IP_SEL
BYPASS
MAN/AUTO
CTRL0
CTRL1
DOUBLE
SKEW_EN
Figure 4-1: GS4915 Typical Application Circuit
GND_D
GND_D
PCLK_DIFF+
PCLK_DIFF-
PCLK_SE
LOCK
GS4915 ClockCleaner™
Data Sheet
39145 - 5
June 2009
22 of 27