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Электронный компонент: T-1250SCT

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Specialty Components
Fibre Channel
Dual Transformers
Compliant with ANSI X3T11, Fibre Channel, FC-PH-3
for 1/4 & full speed applications, SMPTE
Industrial temperature range -40 to +85
o
C
For use with 150 ohm Twinax cable
Designed to withstand infrared and vapor phase soldering
Pick and place compatible
Weight -- 1.0 grams
TWO PEARL BUCK COURT
BRISTOL, PA 19007-6812
TEL 215-781-6400
FAX 215-781-6403
www.pulsespecialty.com
Part No.
Turns
Ratio
5.0%
Primary Inductance
OCL (H, Min)
RiseTime
(pS Max.)
@ 20-80%
DC
Resistance
(W Max)
Hi-pot
(Vrms Min)
Insertion Loss (Max)
Application
Nominal Bit Rate
(Mbaud)
T-330SCT
1CT:1CT
26.00
(@1.0 VRms,100KHz)
350.00
0.19
1,500
-1.50 dB
(15 - 165 MHz)
265.625
(Quarter Speed)
T-1062SCT
1CT:1CT
3.75
(@10 mVRms,100KHz)
280.00
0.15
1,500
-2.00 dB
(100 - 625 MHz)
1062.50
(Full Speed)
1250.00
1485.00
SMPTE
-2.00 dB
-2.50 dB
0.15
1,500
1,500
0.15
280.00
280.00
3.75
3.75
1CT:1CT
1CT:1CT
T-1250SCT
T-1485SCT
ELECTRICAL CHARACTERISTICS; OPERATING TEMPERATURE -40 TO +85
O
C
.180
MAX
.055
.045
.022
.014
.350 .010
.015
.005
.050
.020
.420 .015
.010
.005
0.510
MAX
.300 MAX
0.360
0.340
0.280
0.260
0.470
0.450
0.060
0.040
0.105
0.085
0.030
0.020
16
15
14
13
12 11
10
9
1
2
3
4
5
6
7
8
SCHEMATIC
MECHANICAL OUTLINE
TWO PEARL BUCK COURT
BRISTOL, PA 19007-6812
TEL 215-781-6400
FAX 215-781-6403
www.pulsespecialty.com
1:1
1:1
1:1
1:1
9
11
14
16
1
3
6
8
Fig. 1: Typical Application Circuit
RX
RY
TX
TY
51 ohm
+ 1%
51 ohm
+ 1%
VREF
TERMINATION
E
Q
U
A
L
I
Z
E
R
330 ohm
+5%
330 ohm
+5%
9
11
14
16
1
3
6
8
E
Q
U
A
L
I
Z
E
R
VREF
TERMINATION
TX
TY
RX
RY
TWINAX
150 ohm
330 ohm
+5%
51 ohm
+ 1%
51 ohm
+1%
Notes #1
Note #2
Note #2
Notes #1
T-330SCT
or
T-1062SCT
T-330SCT
or
T-1062SCT
330 ohm
+5%
APPLICATION
Pulse Specialty Components has designed Fibre Channel dual
transformers specifically for point to point coupling to 150 ohm
twinax cable. The isolation transformers protect the station from
static charges that may develop on the cable and prevents
ground loop currents from being transferred between stations.
The devices have also been designed to provide common mode
rejection within the transmission band and thus reduce EMI. The
wide bandwidth of these devices minimizes data dependent jitter
by providing fast signal rise times. Low-end bandwidth also
minimizes base-line wander, another contributor to jitter.
The dual package allows connection of both the transmit and
receive channel, as shown in the application circuit below.
Surface-mount packaging also allows a cost-effective solution.
Note 1 - The transformer, 51 ohm resistors, and the impedance
of the driver are matched to acheive the best return loss (S11) for
the transmitter of the 150 ohm system.
Note 2 - Thre total impedance of termination resistor network
shall be 150 ohms.
Note 3 - When laying out PCB, transmission line methods must
be utilized to maintain return loss and signal integrity.
Transformer must be located within .50" of the DB9 connector.
Note 4 - It is recommended that the center tap (CT) of trans-
former(s), cable side, be connected to earth/chassis (cable
shield) ground either directly or via a transient voltage suppressor
(TVS) type component and earth/chassis ground should be "AC-
coupled" to signal (digital) ground through a .027uF, 500V capaci-
tor.