5.0 Electrical/Mechanical Specifications
5.4 AC Characteristics
Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
5.4 AC Characteristics
Table 5-5. Input Clock Timing
Symbol
Parameter
Minimum
Maximum
Units
1
MCLK Frequency
REFCKI Frequency
8.0
9.999
1.5
1.5
8
35.7
10.001
2.1
MHz
MHz
MHz
MHz
kHz
RCKI, TCKI, ACKI Frequency
RSBCKI, TSBCKI Frequency
CLADI Frequency
8.2
16,384
5.0
TCK Frequency
0
MHz
2
3
Clock Width High
RCKI, TCKI, ACKI, CLADI
MCLK, REFCKI, RSBCKI, TSBCKI
0.2 x t(1)
0.4 x t(1)
0.8 x t(1)
0.6 x t(1)
ns
ns
Clock Width Low
RCKI, TCKI, ACKI, CLADI
MCLK, REFCKI, RSBCKI, TSBCKI
0.2 x t(1)
0.4 x t(1)
0.8 x t(1)
0.6 x t(1)
ns
ns
4
5
Clock Rise Time
Clock Fall Time
—
—
20
20
ns
ns
Figure 5-1. Minimum Clock Pulse Widths
1
2
3
90%
50%
10%
4
5
5-4
Conexant
N8370DSE