Datasheet

78Q2123/78Q2133 Data Sheet DS_21x3_001
T
f
Tclkper
Tclkhi
Figure 8: External XTLP Oscillator Characteristics
4.9.1 External XTLP Oscillator Characteristics
Parameter Symbol Condition Min Nom Max Unit
XTLP Input Level
See specification for
CIS-type input
XTLN Input Low
Voltage
0.8 V
XTLP Frequency f See Note 1 25.000 MHz
XTLP Period Tclkper See Note 1 40 ns
XTLP Duty Cycle Tclkhi / Tclkper 40 60 %
Rise / Fall Time Tr, Tf 4.0 ns
Absolute Jitter Input signaling
requirements = CIS
0.1 ns
Note 1: IEEE 802.3 frequency tolerance r50 ppm.
Tr
XTLP
34