tza3012ahw NXP Semiconductors, tza3012ahw Datasheet - Page 12

• Manufacturer Part Number: tza3012ahw
• Description: 30 Mbits/s Up To 3.2 Gbits/s A-ratetm Fibre Optic Receiver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Programming the DCR
The following dividers are used to program the clock
synthesizer: the main divider N, the fractional divider K
and the octave divider M.
The division factor for M is obtained by first determining in
which octave the desired bit rate belongs as shown in
Figure 7 and Tables 8 and 9.
Table 8 Octave designation and M division factor
2003 May 21
handbook, halfpage
BIT RATE
LOWEST
(Mbits/s)
30 Mbits/s up to 3.2 Gbits/s
A-rate
28.125 56.25 112.5
Fig.7
28.125
112.5
56.25
1800
900
450
225
6
Allocation of octaves for common bit rates
shown on a logarithmic scale.
5
fibre optic receiver
BIT RATE
HIGHEST
(Mbits/s)
112.5
56.25
3200
1800
900
450
225
4
225
3
450
OCTAVE
2
0
1
2
3
4
5
6
900
1
1800
M DIVISION
Mbits/s
FACTOR
16
32
64
0
MGU316
1
2
4
8
3200
12
Table 9 Common optical transmission protocols and
Once the octave and M division factor are known, the
division factors for N and K can be calculated for a given
reference frequency using the Flowchart in Fig.8.
10GE
2xHDTV
STM16/OC48
STM16/OC48
DV-6000
Fibre Channel
HDTV
D-1 Video
DV-6010
Gigabit Ethernet (GE)
Fibre Channel
OptiConnect
ISC
STM4/OC12
DV-6400
Fibre Channel
OptiConnect
Fibre Channel
ESCON/SBCON
STM1/OC3
FDDI
Fast Ethernet
Fibre Channel
OC1
PROTOCOL
corresponding octaves
FEC
BIT RATE
(Mbits/s)
3125.00
2970.00
2666.06
2488.32
2380.00
2125.00
1485.00
1380.00
1300.00
1250.00
1062.50
1062.50
1062.50
622.08
595.00
425.00
265.63
212.50
200.00
155.52
125.00
125.00
106.25
51.84
TZA3012AHW
Product specification
OCTAVE
0
0
0
0
0
0
1
1
1
1
1
1
1
2
2
3
3
4
4
4
4
4
5
6