CY22801

Document Number: 001-15571 Rev. *H

Page 3 of 25

Pin Configurations

Figure 1. CY22801 8-pin SOIC pinout

CY22801

1

2

3

4

8

7

6

5

XOUT

CLKC/FS2

CLKA

CLKB/FS1/SCLK

XIN/CLKIN

SDAT/FS0/

VCXO/OE/PD#

Pin Definitions

Name

Pin Number

Description

CLKIN /

XIN

1

External reference crystal input / external reference clock input

2

3.3 V voltage supply

SDAT / FS0

/ VCXO /

OE / PD#

3

Serial interface data line / frequency select 0 / VCXO analog control voltage / Output Enable /

Power-down

4

Ground

CLKB / FS1

/ SCLK

5

Clock output B / frequency select 1 / serial interface clock line

CLKA

6

Clock output A

CLKC /

FS2

7

XOUT

8

External reference crystal output: Connect to external crystal. When the reference is an external clock

signal (applied to pin 1), this pin is not used and must be left floating.