CY2305/CY2309 Cypress Semiconductor Corp., CY2305/CY2309 Datasheet - Page 2

• Manufacturer Part Number: CY2305/CY2309
• Description: PLL Based Clock Distribution Device
• Manufacturer: Cypress Semiconductor Corp.

Document #: 38-07140 Rev. *C
Pin Description for CY2309
Pin Description for CY2305
Select Input Decoding for CY2309
Notes:
1.
2.
3.
4.
S2
0
0
1
1
Weak pull-down.
Weak pull-down on all outputs.
Weak pull-ups on these inputs.
This output is driven and has an internal feedback for the PLL. The load on this output can be adjusted to change the skew between the reference and output.
Pin
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
S1
0
1
0
1
REF
CLKA1
CLKA2
V
GND
CLKB1
CLKB2
S2
S1
CLKB3
CLKB4
GND
V
CLKA3
CLKA4
CLKOUT
REF
CLK2
CLK1
GND
CLK3
V
CLK4
CLKOUT
DD
DD
DD
[3]
[3]
[1]
[1]
CLOCK A1–A4
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
Three-state
[2]
Signal
Signal
[2]
Driven
Driven
Driven
CLOCK B1–B4
Input reference frequency, 5V-tolerant input
Buffered clock output, Bank A
Buffered clock output, Bank A
3.3V 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
3.3V supply
Buffered clock output, Bank A
Buffered clock output, Bank A
Buffered output, internal feedback on this pin
Input reference frequency, 5V-tolerant input
Buffered clock output
Buffered clock output
Ground
Buffered clock output
3.3V supply
Buffered clock output
Buffered clock output, internal feedback on this pin
Three-state
Three-state
Driven
Driven
CLKOUT
Driven
Driven
Driven
Driven
[4]
Description
Description
Output Source
Reference
PLL
PLL
PLL
PLL Shutdown
CY2305
CY2309
Page 2 of 13
N
N
N
Y