PI6C3622-1LEX Pericom Semiconductor, PI6C3622-1LEX Datasheet - Page 7

• Manufacturer Part Number: PI6C3622-1LEX
• Description: Clock Generators & Support Products 2.5V/3.3V Low Profile Spread
• Manufacturer: Pericom Semiconductor

Specifications of PI6C3622-1LEX

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application Information
Two decoupling capacitors of 0.1uF and 1nF must be connected in parallel between VDD and GND. To opti-
mize device performance and to lower output noise, the coupling capacitors should be placed on the compo-
nent side of the board as close to these pins as possible. There should be no vias placed between the decou-
pling capacitors and VDD pin. The PCB trace to VDD pin should be as short as possible, and no vias should
be placed between VDD and the capacitors in the decoupling circuit.
Crystal Load Capacitor
If a crystal is used with the device, two external trim capacitors, CLtrim, are used to adjust the effective capac-
itance to match the required crystal load capacitance. The CLtrim value can be derived from formula CLtrim =
2*CL – (Cs + Ci). The typical CLtrim = 28pF when crystal load = 18pF, stray capacitance Cs = 3pF and XTAL
pins capacitance = 5pF.
Decoupling Capacitor
0.1uF 1nF
S0,S1,
SSON
VDD
Strapping to low
C
Ltrim
X1
7
0.1uF 1nF
Low Power Spread Spectrum Frequency Multiplier
Crystal
X2
S0,S1,
VDD
SSON
C
VDD
Ltrim
Strapping to high
SSCG-GP Family
PI6C3622-1
PS8944A
01/30/08