SP5655
2·7GHz Bidirectional I
2
C Bus Controlled Synthesiser
Advance Information
Supersedes July 1996 version, DS3743-4.3
DS3743 - 5.0 June 1998
The SP5655 is a single chip frequency synthesiser designed
for TV tuning systems. Control data is entered in the standard
I
2
C BUS format. The device contains 2 addressable current
limited outputs and 4 addressable bidirectional open-collector
ports, one of which is a 3-bit ADC. The information on these
ports can be read via the I
2
C BUS. the device has one fixed
I
2
C BUS address and 3 programmable addresses,
programmed by applying a specific input voltage to one of the
current limited outputs. This enables two or more synthesisers
to be used in a system.
CHARGE PUMP
CRYSTAL Q1
CRYSTAL Q2
SDA
SCL
1
2
3
4
5
6
7
8
16
15
14
13
DRIVE OUTPUT
V
EE
RF INPUT
RF INPUT
V
CC
P0 OUTPUT PORT
P3 OUTPUT PORT/
ADD SELECT
I/O PORT P4
†
SP5655
12
11
10
9
†
I/O PORT P7
*
I/O PORT P6
FEATURES
†
I/O PORT P5
s
s
s
s
s
s
s
s
s
s
s
s
s
Complete 2·7GHz Single Chip System
High Sensitivity RF Inputs
Programmable via I
2
C BUS
Low Power Consumption (5V, 30mA)
Low Radiation
Phase Lock Detector
Varactor Drive Amp Disable
6 Controllable Outputs, 4 Bidirectional
5-Level ADC
Variable I
2
C BUS Address for Multi-tuner Applications
ESD Protection: 4kV, Mil-Std-883C, Method 3015
(1)
Switchable
4512/1024
Reference Divider
Pin and Function Compatible with SP5055S
(2)
(1) Normal ESD handling precautions should be observed.
(2) The SP5055S does not have a switchable reference
division ratio.
MP16
† = Logic level I/O port
*
= 3-bit ADC input
Fig. 1 Pin connections – top view
APPLICATIONS
s
Satellite TV
s
High IF Cable Tuning Systems
THERMAL DATA
u
JC
= 41°C/W
u
JA
= 111°C/W
ORDERING INFORMATION
SP5655 KG/MPAS
(Tubes)
SP5655S KG/MPAD
(Tape and reel)
MITEL [ MITEL NETWORKS CORPORATION ]
