2.5 Gbps Single Mode SFF LC Transceiver
C-1XX-2500(C)-FDFB-SLCX
8
7
TX_DIS
TTL logic level
TX_GND
TRANSMITTER
Z=50�
TD +
TX_D
TX_D
9
DRIVER
Z=50�
TD -
10
LASER
Vcc_TX
Vcc_RX
6
2
See
N
t
1
N
o
e
Note 1
Fig. 4A
Serializer / De-Serializer
with LVPECL lnputs/Outputs
See
3
4
Vcc= +3.3V
Fig. 3
SD
BIAS
82
Ω
82Ω
Z=50�
Z=50�
RD -
RX_D
TZ
AMP
POST
AMP
PIN
RD +
RX_D
5
1
130
Ω
130Ω
RX_GND
RECEIVER
Figure 2.Recommended TRANSMIT and RECEIVE Data Terminations for SERDES with LVPECL I/Os.
Note 1. Consult SERDES manufacturer’s application information for biasing required for Tx outputs. Some serializer outputs
are internally biased and may not need external bias resistors.
Signal Detect
The C-1XX-2500(C)-FDFB-SLCX transceivers are equipped with LVTTL / LVPECL signal detect outputs. The standard LVTTL output eliminates
the need for a LVPECL to LVTTL level shifter in most in most applications.
R2
LVPECL
or
LVTTL Logic
R1
R: For LVTTL level R1=N.C., R2=N.C.
LVPECL level R1=82,R2=130
Figure 3: Signal Detect
Note:
C-1XX-2500-FDFB-SLCX with LVPECL SD output
C-1XX-2500C-FDFB-SLCX with LVTTL SD output
20550 Nordhoff St. • Chatsworth, CA 91311 • tel: 818.773.9044 • fax: 818.576.9486
9F, No 81, Shui Lee Rd. • Hsinchu, Taiwan, R.O.C. • tel: 886.3.5169222 • fax: 886.3.5169213
LUMINENTOIC.COM
LUMNDS851-Jul2005
rev. A.0
5