T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation — LXT350
Table 28. T1 Operation Master and Transmit Clock Timing Characteristics
(See Figure 16)
Parameter
Master clock frequency
Sym
Min
Typ1
Max
Unit
Notes
MCLK
MCLKt
MCLKd
TCLK
TCLKt
TCLKd
tSUT
–
–
1.544
–
–
MHz
ppm
%
must be supplied
Master clock tolerance
±50
Master clock duty cycle
40
–
–
60
–
Transmit clock frequency
Transmit clock tolerance
Transmit clock duty cycle
TPOS/TNEG to TCLK setup time
TCLK to TPOS/TNEG hold time
1.544
MHz
ppm
%
–
–
–
–
–
±100
90
–
10
50
50
ns
tHT
–
ns
1. Typical figures are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Table 29. E1 Operation Master and Transmit Clock Timing Characteristics
(See Figure 16)
Parameter
Master clock frequency
Sym
Min
Typ1
Max
Unit
Notes
MCLK
MCLKt
MCLKd
TCLK
TCLKt
TCLKd
tSUT
–
–
2.048
–
–
MHz
ppm
%
must be supplied
Master clock tolerance
±50
Master clock duty cycle
40
–
–
60
–
Transmit clock frequency
Transmit clock tolerance
Transmit clock duty cycle
TPOS/TNEG to TCLK setup time
TCLK to TPOS/TNEG hold time
2.048
MHz
ppm
%
–
–
–
–
–
±100
90
–
10
50
50
ns
tHT
–
ns
1. Typical figures are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.
Figure 16. Transmit Clock Timing
Datasheet
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ETC [ ETC ]
