CY2545_0710 Datasheet, PDF (3/15 Pages) Cypress Semiconductor – Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface

Table 1. Pin Definition - CY2545 24 LD QFN (V_DD = 2.5V, 3.0V or 3.3V Supply) (continued)
Pin Number
Name
IO
Description
22
V_DD
Power
Power supply for core and inputs: 2.5V/3.0V/3.3V
23
XOUT
Output
Crystal output
24
XIN/EXCLKIN Input
Crystal input or 1.8V external clock input
Figure 2. Pin Diagram - CY2547 24 LD QFN
CY2545
CY2547
24
23
22
21
20
19
GND ¹
18 _GND
CLK1 ²
17 _CLK7
VDD_CLK_B1 ³
PD#OE 4
CY2547
24LD QFN
16 VDD_CLK_B3
15 _CLK6/SSON
VDD 5
14 VDD_CLK_B2
CLK2 6
13 CLK5
7
8
9
10
11
12
Table 2. Pin Definition - CY2547 24 LD QFN (VDD = 1.8V Supply)
Pin Number
Name
1
GND
IO
Power
Power supply ground
Description
2
CLK1
Output
Programmable clock output. Output voltage depends on Bank1 voltage
3
VDD_CLK_B1 Power
Power supply for Bank1 (CLK1, CLK2) output: 1.8V
4
PD#/OE
Input
Multifunction programmable pin: Output enable or Power down mode
5
VDD
Power
Power supply for core and inputs: 1.8V
6
CLK2
Output
Programmable output clock. Output voltage depends on Bank1 voltage
7
GND
Power
Power supply ground
8
SCL
Input
Serial data clock
9
SDA
Input/Output Serial data input
10
CLK3/FS
Output/Input Multifunction programmable pin: Programmable clock output or frequency
select input pin. Output voltage of CLK3 depends on VDD_CLK_B2 voltage
11
CLK4
Output
Programmable output clock. Output voltage depends on Bank2 voltage
12
GND
Power
Power supply ground
13
CLK5
Output
Programmable clock output. Output voltage depends on Bank2 voltage
14
VDD_CLK_B2 Power
Power supply for Bank2 (CLK3, CLK4, CLK5) output: 1.8V
15
CLK6/SSON
Output/Input Multifunction programmable pin: Programmable clock output or spread
spectrum ON/OFF control input pin. Output voltage of CLK6 depends on
VDD_CLK_B3 voltage
16
VDD_CLK_B3 Power
Power supply for Bank3 (CLK6, CLK7, CLK8) output: 1.8V
17
CLK7
Output
Programmable clock output. Output voltage depends on Bank3 voltage
18
GND
Power
Power supply ground
Document #: 001-13196 Rev. *A
Page 3 of 15
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