PacketClock鈩?/div>
T1/E1 Clock Generator
Features
鈥?Integrated phase-locked loop
鈥?Low jitter, high accuracy outputs
鈥?3.3V Operation
Part Number
CY26211
Outputs
2
Input Frequency Range
1.544 or 2.048 MHz
Benefits
High performance PLL tailored for T1/E1 clock generation
Meets critical timing requirements in complex system designs
Enables application compatibility
Output Frequencies
19.44 MHz, 77.76 MHz
Logic Block Diagram
Fref
Q
桅
VCO
P
OUTPUT
DIVIDERS
CLK1
CLK2
PLL
FS
VDD
VSS
Pin Configuration
CY26211
8-pin SOIC
Fref
VDD
FS
VSS
1
2
3
4
8
7
6
5
NC
NC
CLK1
CLK2
Table 1. CY26211 Frequency Select Option
Frequency Select
0
1
Fref
1.544
2.048
CLK1
19.44
19.44
CLK2
77.76
77.76
Unit
MHz
MHz
Cypress Semiconductor Corporation
Document #: 38-07447 Rev. **
鈥?/div>
3901 North First Street
鈥?/div>
San Jose, CA 95134
鈥?/div>
408-943-2600
Revised December 9, 2002
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