SFBD-1250A4Q1R
DELTA ELECTRONICS, INC.
4 Revision:
S0
04/12/2007
www.deltaww.com
5. Electrical Interface Characteristics
Parameter
Symbol
Min.
Typ.
Max.
Unit
Note
Transmitter
Total Supply Current
I
CC
A
mA
Note
(1)
Differential line input Impedance
R
IN
90
100
110
Ohm
Differential Data Input Swing
V
DT
400 1600
mV
p-p
Note
(2)
Transmitter Disable Input-High
V
DISH
2 V
CC
V
Transmitter Disable Input-Low
V
DISL
0 0.8 V
LVTTL
Receiver
Total Supply Current
I
CC
B
mA
Note
(1)
Differential Data Output Swing
V
DR
400
800
1200
mV
p-p
Note
(2)
Signal Detect Output Voltage-High
V
LOSH
2
Vcc+0.3
V
Signal Detect Output Voltage-Low
V
LOSL
0 0.8 V
Note (3)
Note (1). A (TX)+ B (RX) = 300mA (Not include termination circuit)
Note (2). Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/
Deserializer.
Note (3). LVTTL logic output, internal 4.7K~10K Ohm pull-up resistor. External load on host board is
unnecessary.
6. Pin Description
Tx/Rx Pin No.
I/O
Pin Name
Description
1
VeeR
Receiver Ground
2
VccR
+3.3V Receiver Power Supply
3 O
SD
Normal Optical Input indicated by logic “High”, and No Optical
Input indicated by logic “Low”. (LVTTL)
4 O
RD(n)
Inverted Receiver Data Output (AC-Coupled CML output)
Rx
5 O
RD(p)
Non-Inverted Receiver Data Output (AC-Coupled CML output)
6
VccT
+3.3V Transmitter Power Supply
7
VeeT
Transmitter Ground
8 I
Tx_Dis
LVTTL Logic “High” to Disable Transmitter, and Enable
Transmitter by Logic “Low”.
9 I
TD(p)
Non-Inverted Transmitter Data Input (AC-Coupled LVPECL input)
Tx
10 I
TD(n)
Inverted Transmitter Data Input (AC-Coupled LVPECL input)
MS
Mounting studs/ connect this pin to Chassis ground
Note (1). EMI shielding lead must be connected to Signal ground
Bottom View
MS
MS
