Silicon Laboratories SI5369 User Manual

S i 5 3 x x - R M

108

Rev. 0.5

Figure 43. Differential Output Example Requiring Attenuation

Figure 44. Typical CMOS Output Circuit (Tie CKOUTn+ and CKOUTn– Together)

Unused output drivers should be powered down, per Table 57, or left floating.

The pin-controlled parts have a DBL2_BY pin that can be used to disable CKOUT2.

Table 57. Disabling Unused Output Driver

Output Driver

Si5365, Si5366

Si5325, Si5326, Si5367, Si5368

CKOUT1 and CKOUT2

N/A

Use SFOUT_REG to disable individ-

ual CKOUTn.

CKOUT3 and CKOUT4

DBL34

CKOUT5/FS_OUT

DBL5/DBL_FS

Si53xx

Rcvr

10 

80 

All resistors are located next to RCVR

Si53xx

CMOS

Logic

CKOUTn

Optionally Tie CKOUTn

Outputs Together for Greater Strength