ISG3300EU
OUTLINE DIMENSIONS (Units in mm)
Pin Connections
1. RF AGC
2. VCC (Tx)
3. TXEN
4. TX IN –
5. TX IN +
6. TXAGC
7. VCC2 (RX)
8. VCC1 (RX)
9. IF AGC
10. GND
CUSTOMER P/N
54.0
52.4
11. CLK
12. DATA
13. LDEN
14. GND
13.2
4.0
17.3
15. IF OUT+
16. IF OUT–
DATUM LINE
3.0
1.6
4.1
24.5±0.2
43.3
2.2
3.5
2.9
PIN 1
MODEL
2.5
1.7
7.7
14.0
SERIAL NUMBER
ISGXXX 98017 00056
DATE CODE
DATUM LINE
0.4±0.1
2.0 MAX
0.6±0.1
2.54 x 15 = 38.1±0.2
0.4±0.1
26.7±0.2
88.2
89.3
19.9
Table 1. Programmable Modes
Notes:
1. The ICPO LOW Current State = 1/4 x ICPO HIGH
Current.
C1 C2
R16
R17
R18
RF2 DO
TRI-STATE
R19
R20
0
0
RF2 Phase RF2 ICPO
Detector
Polarity
RF1 Phase RF1 ICPO
Detector
Polarity
RF2 LD RF2 FO
2. Activitation of the RF2 PLL or RF1 PLL powerdown
modes result in the disabling of the respective N counter
divider and debiasing of its respective fIN inputs (to a
high impedance state). The powerdown function is
gated by the charge pump to prevent unwanted
frequency jumps. Once the powerdown program mode
is loaded, the part will go into powerdown mode when
the charge pump reaches a TRI-STATE condition. The
R counter and Oscillator functionality does not become
disabled until both RF2 and RF1 powerdown bits are
activated. The OSCIN is connected to VCC through a 100
kΩ resistor and the OSCOUT goes HIGH when this con-
dition exists. The MICROWAVETM control register re-
mains active and capable of loading and latching data
during all the powerdown modes.
0
1
RF1DO
TRI-STATE
RF1 LD RF1 FO
C1
1
1
C2
0
N19
RF2 Prescaler
RF1 Prescaler
N20
Pwdn RF2
Pwdn RF1
1
Table 2. Mode Select Truth Table
1
O
Phase DO TRI-STATE ICP
Detector
Polarity3
RF1
RF2
Pwdn2
Prescaler Prescaler
0 Negative
Normal
Operation
LOW 64/65
64/65 pwrd up
3. Phase Detector Polarity
Depending upon VCO characteristics, the R16 bits
should be set accordingly:
1
Positive TRI-STATE HIGH 128/129 128/129 pwrd dn
When VCO characteristics are positive like (1), R16
should be set HIGH, when VCO characteristics are
negative like (2), R16 should be set LOW.
CEL [ CALIFORNIA EASTERN LABS ]
