Si5040
Table 13. Si5040 Pin Descriptions (Continued)
Pin
Name
Type*
Level
Description
Power and Ground
1, 5, 8,
GND
P
GND
Supply Ground.
17, 20,
23, 28,
31
Connect to system GND. Ensure a very low impedance path
for optimal performance.
Paddle
GND
P
GND
Paddle Ground.
Must connect to system GND. Ensure a very low impedance
path for optimal performance.
12, 15,
VDD
P
1.8 VDC
Supply Voltage.
27,32
Nominally 1.8 V. Upon power up,if VDD and VDDIO are not
tied to the same supply voltage, the VDD voltage must
achieve 1.5 V before VDDIO is applied and reaches .25 V.
Failure to do so may cause the SD line to glitch low.
4
VDDIO
P
3.3 VDC
LVTTL I/O Supply Voltage.
11
10
or
1.8 VDC
Connect to either 1.8 or 3.3 V. When connected to 3.3 V,
LVTTL compatible voltage swings are supported on the LVTTL
inputs and LVTTL outputs of the device.
NC Pins
NC.
Do not connect to these pins.
*Note: TYPE: P = Power; AI = Analog Input; AO = Analog Output; DI = Digital Input; DO = Digital Output; DIO = Digital
Input/Output.
102
Rev. 1.3
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