Si5317
1.1. Three-Level (3L) Input Pins (No External Resistors)
Si5317
I
imm
V
DD
75 k
External Driver
75 k
Figure 3. Three Level Input Pins
1.2. Three-Level Input Pins (with External Resistors)
V
DD
I
imm
18 k
V
DD
Si5317
75 k
External Driver
18 k
75 k
One of eight resistors from a Panasonic EXB-D10C183J
(or similar) resistor pack
Figure 4. Three-Level Input Pins
Table 3. Three-Level Input Pins
Parameter
Input Low Current
Input Mid Current
Input High Current
Symbol
Iill
Iimm
Iihh
Min
–30 µA
–11 µA
—
Max
—
–11 µA
–30 µA
Notes:
1.
The current parameters are the amount of leakage that the 3L inputs can tolerate from an external driver. In most
designs, an external resistor voltage divider is recommended.
2.
Resistor packs are only needed if the leakage current of the external driver exceeds the listed currents.
Any resistor pack may be used (e.g.
Panasonic EXB-D10C183J). PCB layout is not critical.
3.
If a pin is tied to ground or V
DD
, no resistors are needed.
4.
If a pin is left open (no connect), no resistors are needed.
Preliminary Rev. 0.15
9
SILABS [ SILICON LABORATORIES ]
