CN8330 Datasheet, PDF (78/101 Pages) Conexant Systems, Inc – DS3/E3 Framer with 52 Mbps HDLC Controller

4.0 Mechanical/Electrical Specifications
4.1 Timing Requirements
Table 4-3. Output Signal Timing
Output Symbol
RXCLK
RXMSY
RXDAT
RXCCK
CBITO
RXOVH
RXBCK
RXGAPCK
RXGAPCK
RDAT[7] /TXNRZ
TXPOS/TXNEG
TXSYO
TXGAPCK
TXBCK
TCLKO
TXOVH
Clock
DS3CKI/RXCKI
RXCLK
RXCLK
RXCLK
RXCCK
RXCLK
RXCLK
DS3CKI/RXCKI
RXCLK
TCLKO
TCLKO
TXCKI
TXCKI
TXCKI
TXCKI
TXCKI
CN8330
DS3/E3 Framer with 52 Mbps HDLC Controller
t_pd min
2.8
1.8
1.6
3.2
t_cyc+1.0
2.5
2.0
2.8
1.0
1.2
1.2
3.2
2.2
3.0
2.8
3.4
t_pd max
13.0
5.0
5.2
9.1
t_cyc+2.0
11.1
10.0
22.0
9.0
7.0
8.2
11.1
11.7
16.0
12.8
15.6
Edge
Rising
Rising
Rising
Rising
Rising
Rising
Falling
Both
Both
Rising
Rising
Rising
Both
Rising
Rising
Falling
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Table 4-4. Input Setup/Hold Timing
Input Symbol
CBITI
TDAT[7:0] (Parallel Mode)
SNDMSG,SNDFCS
TXSYI
TXDATI
TXENI
LCVERRI
RXPOS, RXNEG
Clock
TXCCK
TXBCK
TXBCK
TXCKI
TXCKI
TCLKO
TCLKO
DS3CKI
t_su min
2 × t_cyc
–2 × t_cyc
–2 × t_cyc
1.0
1.0
9.0
9.0
1.0
t_hld min
4 × t_cyc
Full TXBCK Period
Full TXBCK Period
6.0
6.0
0.0
0.0
5.0
Edge
Falling
Rising
Rising
Rising
Falling
Rising
Rising
Rising
Units
ns
ns
ns
ns
ns
ns
ns
ns
4-4
Conexant
100441E