CY2305, CY2309
Pinouts
Table 1. Pin Description for CY2305
Pin
Signal
1
REF[1]
2
CLK2[2]
3
CLK1[2]
4
GND
5
CLK3[2]
6
VDD
7
CLK4[2]
8
CLKOUT[2]
Figure 1. Pin Diagram - CY2305
REF 1
CLK2 2
CLK1 3
GND 4
8 CLKOUT
7 CLK4
6 VDD
5 CLK3
Description
Input reference frequency, 5-V tolerant input
Buffered clock output
Buffered clock output
Ground
Buffered clock output
3.3-V supply
Buffered clock output
Buffered clock output, internal feedback on this pin
Table 2. Pin Description for CY2309
Pin
Signal
1
REF[1]
2
CLKA1[2]
3
CLKA2[2]
4
VDD
5
GND
6
CLKB1[2]
7
CLKB2[2]
8
S2[3]
9
S1[3]
10
CLKB3[2]
11
CLKB4[2]
12
GND
Notes
1. Weak pull down.
2. Weak pull down on all outputs.
3. Weak pull ups on these inputs.
Figure 2. Pin Diagram - CY2309
REF 1
CLKA1 2
CLKA2 3
VDD
4
GND 5
CLKB1 6
CLKB2 7
S2 8
16 CLKOUT
15 CLKA4
14 CLKA3
13
VDD
12 GND
11 CLKB4
10 CLKB3
9 S1
Description
Input reference frequency, 5-V tolerant input
Buffered clock output, Bank A
Buffered clock output, Bank A
3.3-V supply
Ground
Buffered clock output, Bank B
Buffered clock output, Bank B
Select input, bit 2
Select input, bit 1
Buffered clock output, Bank B
Buffered clock output, Bank B
Ground
Document Number : 38-07140 Rev. *M
Page 3 of 19
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