78Q2123/78Q2133 MicroPHY™
10/100BASE-TX Transceiver
T
r
T
f
XTLP
T
T
clkper
clkhi
External XTLP Oscillator Characteristics
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
XTLP Period
f
See Note 1
See Note 1
25.000
40
MHz
ns
Tclkper
XTLP Duty Cycle
Rise / Fall Time
Absolute Jitter
Tclkhi / Tclkper
40
60
4.0
0.1
%
ns
ns
Tr, Tf
Input signaling
requirements = CIS
Note 1: IEEE 802.3 frequency tolerance ±50 ppm
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© 2009 Teridian Semiconductor Corporation
Rev 1.5