SP5610 Datasheet, PDF (9/15 Pages) Zarlink Semiconductor Inc – 1.3GHz BI-DIRECTIONAL I2C BUS CONTROLLED SYNTHESISER

V REF
3K
3K
RF INPUTS
RF input
VCC
CRYSTAL Q1
CRYSTAL Q2
Reference oscillator
VCC
PORT
3k
SP5610
VCC
CHARGE
PUMP
OS
(O/P DISABLE)
150
DRIVE
OUTPUT
Loop amplifier
VCC
67k
SCL/SDA
3k
ACK
SDA ONLY
SCL and SDA input
VCC
PORT
3k
12k
Ports P7 – P4
Fig. 6 Input/output interface circuits
Port P3
7