SI52131-A11A Datasheet, PDF (15/19 Pages) Silicon Laboratories – No termination resistors required

5. Si52131-A11A Pin Descriptions: 24-Pin QFN
Si52131-A11A
VDD_REF 1
REF 2
OE_REF¹ 3
VSS_REF 4
OE_DIFF0¹ 5
VDD_DIFF 6
24 23 22 21 20 19
18 OE_DIFF1¹
17 VDD_DIFF
25
GND
16 _DIFF1
15 DIFF1
14 DIFF0
13 DIFF0
7 8 9 10 11 12
Pin #
1
2
3
4
5
6
7
8
Note
1. Internal 100 k-ohm pull-down resistor
Table 8. Part Number 24-Pin QFN Descriptions
Name
VDD_REF
REF
OE_REF¹
VSS_REF
OE_DIFF0¹
VDD_DIFF
SS0¹
SS1¹
Type
PWR 3.3 V power supply.
Description
O, SE 3.3 V, 25 MHz Reference clock output.
I,PD Active low input pin enables REF (internal 100 k pull-down).
GND Ground.
I,PD Active low input pin enables DIFF0 (internal 100 k pull-down).
PWR 3.3 V power supply.
I, PD 3.3 V tolerant input for enabling frequency/spread selection on DIFF0 and
DIFF1 outputs (internal 100 k pull-down).
I, PD
SS1
SS0
Differential
Differential
Frequency
Spread
0
0
100 MHz
Spread Off
0
1
100 MHz
–0.50%
1
0
125 MHz
Spread Off
1
1
200 MHz
Spread Off
Rev 1.0
15