TELECOMMUNICATIONS
I S O L AT I O N T R A N S F O R M E R S — S U R FA C E - M O U N T
• Surface-mount package; for a smaller surface-mount package, see SMD6xx-05 datasheet
• Designed to accommodate transceiver chip sets from the leading IC vendors
• All components are available with industrial temperature rating (-40°C to +85°C)
• Dual package for complete single port application, includes transmit and receive transformers
• Package molded using UL94-V0 rated material
SMD6xx:
Single Channel, Dual Transformer
SMD6xx Part Number Table
Part
Number
Turns Ratio (Pri:Sec)
Transmit
Receive
SMD601
SMD602
SMD603
SMD604
SMD605
SMD606
SMD607
SMD608
All dimensions are ±0.005 unless otherwise noted.
All dimensions are in inches.
1:1.23CT
1CT:2CT
1:1.36CT
1CT:1/1.26
1CT:1.15CT
1CT:1CT
1CT:1.41CT
1CT:1CT
1:1.36CT
1CT:1.15CT
1CT:2CT
1CT:2.42CT
1CT:2.42CT
1CT:2CT
1:1.36CT
1:1.15CT
1:1.15
1:1.158
1:2.4
1:2.3
1:1.18
1:1.26CT
1:1.58CT
1CT:2CT
1CT:2CT
1CT:2CT
1:2CT
1CT:1.15CT
1CT:2CT
1CT:1.41CT
1CT:1CT
1CT:1CT
1CT:1CT
1CT:2CT
1CT:2.42CT
1CT:1CT
1CT:2CT
1:1.36CT
1:2CT
1:1CT
1:1CT
1:2CT
1:1CT
1:1CT
1:1.26CT
1:1.58CT
SMD609
SMD610
SMD611
T1/E1 Electrical Characteristics @ 25°C
Primary Inductance*:
Leakage Inductance*:
Interwinding Capacitance*:
Dielectric Isolation (Pri:Sec):
1.2mH Min, 1.5 Typ for -ET parts
0.6mH Min for -ET parts @ -40°C
0.6µH Max
35pF Max
1500 Vrms Min
SMD612
SMD613
SMD614
SMD615
SMD617
SMD618
Winding DC Resistance**
Ratio Number
Ohms Max
SMD619
For example:
SMD603 has
0.70 Ohm max Transmit Pri
1.20 Ohm max Transmit Sec
0.70 Ohm max Receive Pri
0.90 Ohm max Receive Sec
SMD620
SMD621
SMD622
SMD623
SMD624
1
1.15
1.23
1.26
1.36
1.41
2
2.4
0.70
0.80
0.90
0.90
0.90
1.00
1.20
1.50
**
All impedance measurements are made with 0.1Vrms@100kHz
** SMD604, SMD605, SMD608, SMD609 and SMD610 have low DC resistance windings
that withstand DC line fault current of 1.75A indefinitely with no dielectric degradation.
Notes:
1) P/N SMD604 provides two turns ratios.
For 1:1, use secondary pins 2-3 and for 1:1.26, use secondary pins 1-3.
2) Part numbers may be modified as follows:
SMD6xxET indicates -40C to +85C operation
SMD6xx-S meets UL1950 supplementary insulation requirements, 250V
SMD6xx-R meets UL1950 reinforced insulation requirements
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