PL
IA
N
T
Features
■
Surface mount
■
Dual transformer for transmit and receive
■
1500 VAC HIPOT
■
RoHS compliant*
Applications
■
Telecom
*R
oH
S
CO
M
Model SM74139EL is currently
available but not recommended for
new designs.
SM74139L - T1/CEPT/ISDN-PRI Dual Transformer
Electrical Specifications @ 25 °C
Primary Pins
Core A ............................................1-3
Core B ............................................6-8
Ratio (±2 %)
Core A & B..................... 1CT : 1.15CT
OCL (mH) min.
Core A & B...................................... 1.2
Leakage Inductance (µH) max.
Core A & B....................................0.60
Cww (pF) max.
Core A & B.......................................30
DCR of primary (Ω) max.
Core A & B....................................0.70
DCR of secondary (Ω) max.
Core A & B....................................0.75
Operating Temperature (°C) ......0 to +70
*CT : center tap
Packaging Specifications
Tape & Reel*...................... 700 pcs./reel
*”E” suffix before “L” in part number
designates tape & reel packaging, e.g.
SM74139EL.
How To Order
DIMENSIONS:
8
9
1
Electrical Schematic
CORE A
16
Product Dimensions
12.82
MAX.
(.505)
16
2
15
9
7.11
MAX.
(.280)
1
1.27
TYP.
(.050)
SM74139L
(DATECODE)
9.52
MAX.
(.375)
8
.457
±
.05
(.018
±
.002)
3
14
CORE B
6
11
1.01
(.040)
7
10
6.22
MAX.
(.245)
MM
(INCHES)
0.254
(.010)
TOLERANCE: ±
SM74139E L
Model
Termination
L = Tin only (RoHS Compliant)
REV. 06/15
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
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