SM74139 - T1/CEPT/ISDN-PRI Dual Transformer
Features
Surface mount
Dual transformer for transmit and receive
1500 VAC HIPOT
Lead free version available (see How to
Order)
Lead free versions are RoHS compliant*
Applications
Telecom
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 (H) max.
Core A & B ....................................0.60
Cww (pF) max.
Core A & B ........................................30
DCR of primary () max.
Core A & B ....................................0.70
DCR of secondary () max.
Core A & B ....................................0.75
Operating Temperature (C) ........0 to +70
*CT : center tap
Product Dimensions
SM74139
(DATECODE)
12.82
(.505)
16
9
1
8
MAX.
7.11
(.280)
MAX.
9.52
(.375)
MAX.
1.27
(.050)
.457 .05
(.018 .002)
TYP.
DIMENSIONS ARE:
MM
(INCHES)
TOLERANCE:
0.254
(.010)
Electrical Schematic
1
CORE A
CORE B
2
3
6
7
8
11
10
9
16
15
14
Packaging Specifications
Tape & Reel* ........................700 pcs./reel
*"E" suffix at end of part number
designates tape & reel packaging, e.g.
SM74139E.
6.22
(.245)
MAX.
1.01
(.040)
SM74139
YYWW
*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.
03/05
*RoHS COMPLIANT
VERSIONS
AVAILABLE
How to Order
SM74139E __
Model
Termination
Blank = Tin-lead
L = Tin only (lead free)
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