STW81101_07 Datasheet, PDF (8/48 Pages) STMicroelectronics – Multi-band RF frequency synthesizer with integrated VCOs

Block diagram and pin configuration
STW81101
Table 1. Pin description (continued)
Pin No
Name
Description
Observation
10 ICP
11 REXT
PLL charge pump output
External resistance connection for
PLL charge pump
12 VDD_CP
13 TEST1
14 LOCK_DET
15 TEST2
16 REF_CLK
17 VDD_PLL
18 EXTVCO_INN
Power supply for charge pump
Test input 1
Lock detector
Test input 2
Reference clock input
PLL digital power supply
External VCO negative input
For test purposes only;
must be connected to
GND
CMOS output
For test purposes only;
must be connected to
GND
For test purposes only;
must be connected to
GND
19 EXTVCO_INP
20 VDD_BUFVCO
21 DBUS_SEL
22 VDD_DBUS
External VCO positive input
VCO buffer power supply
Digital Bus Interface select
SPI and I²C bus power supply
For test purposes only;
must be connected to
GND
CMOS input
23 EXT_PD
24 SDA/DATA
Power down hardware
‘0’ device ON; ‘1’ device OFF
I2CBUS/SPI data line
CMOS input
CMOS Bidir Schmitt
triggered
25 SCL/CLK
26 ADD0/LOAD
I2CBUS/SPI clock line
CMOS input
I2CBUS address select pin/ SPI load
line
CMOS input
27 ADD1
28 ADD2
I2CBUS address select pin
I2CBUS address select pin
CMOS input
CMOS input
8/48