LAN ISOLATION
TRANSFORMER CATALOG
of
TABLE  CONTENTS
ISOLATION TRANSFORMERS
   
10BASE-T FOR ADAPTER CARDS, MAUs, HUBS AND MOTHERBOARD APPLICATIONS
Electrical Specifications: Surface Mount and Through Hole. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ETHERNET AUI TRANSFORMERS
Electrical Specifications: Surface Mount and Through Hole. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
APPLICATION CIRCUITS
 10Base-T  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
 Ethernet   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
 MECHANICALS
 Surface Mount  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
 Through Hole  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
              
USA 858 674 8100USA 858 674 8100  Germany 49 7032 7806 0  Singapore 65 6287 8998  Shanghai 86 21 32181071  China 86 755 33966678  Taiwan 8Germany 49 7032 7806 0 Singapore 65 6287 8998 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 435676886 3 4643715
www.pulseeng.com 1 EC100.N (1/10)ISOLATION TRANSFORMERS
FOR 10BASE-T 
For Adapter Cards, MAUs, Hubs,
and Motherboard Applications
 Meets IEEE 802.3 specification
 Available with common mode chokes 
for EMI suppression
 Through hole, auto-insertable, 16-pin 
DIP package
Electrical Specifications @ 25C  Operating Temperature 0C to 70C
        Sine Wave Interwinding Leakage
Turns Ratio
Common
2
 Part                Primary  Inductance Capacitance Inductance DCR Hipot Schem. Mech 
(5%)
Mode
1 1
 Number  Pins  OCL Cww LL  ( MAX) (Vrms) 
Choke
 Transmit Receive   (H MIN) (pF MAX) (H MAX)    
 2
PAGES 6-7    PAGES 8-9
                                
SURFACE MOUNT
        
 23Z128SM 1CT:1.414CT 1CT:1CT 6-8/1-3  200 15 0.5 0.4 2000 T4 SMT5
 23Z356SM 1CT:1.414CT 1CT:1CT 6-8/1-3  200 12 0.5 0.6 2000 T7 SMT5
 23Z467SM 1CT:2CT 1CT:1CT 6-8/1-3  140 12 0.2 0.6 2000 T7 SMT5
 4
 E2023 1CT: 2.5CT 1CT: 1CT 6-8/1-3  200 15 0.5 0.4 2000 T10 SMT4
 E4001 1CT:2CT 1CT:1CT 6-8/1-3  112 8 0.3 0.8 3000 T5 SMT4
 
 3
 EX2024 1CT: 2.5CT 1CT:1CT 6-8/1-3  350 30 0.8 0.6 2000 T10 SMT4
 PE-65454 1:1.414 1:1 3-4/1-2  140 12 0.2 0.4 2000 T1 SMT2
 PE-65745 1CT: 1.414CT 1CT:1CT 6-8/1-3  140 12 0.2 0.3 1500 T4 SMT4
 PE-68023 1CT:2CT 1CT:1CT 1-3/6-8  200 12 0.3 1.0 1500 T6 SMT4
 PE-68048 1CT: 1.414CT 1CT:1CT 6-8/1-3  110 15 0.4 1.0 1500 T5 SMT4
 PE-68052 2CT:1CT 1CT:1CT 1-3/6-8  140 12 0.3 1.0 1500 T6 SMT4
 PE-68810  1:1 (4X) 1-2/3-4  140 12 0.2 0.4 2000 T3 SMT4
 1-2/3-4  
 PE-68820 1:1.414 (4X)   40 12 0.2 0.4 2000 T3 SMT4
     5-6/7-8        
THROUGH HOLE                         PAGE 6            PAGE 10
 23Z128 1CT:   2CT 1CT:1CT 6-8/1-3  140 15 0.5 0.4 2000 T4 TH3
1. OCL, Cww and LL are measured at 20 mVrms, 100 kHz.
2. For Tape & Reel packaging, add the suffix T to the end of the part number when ordering. e.g. E2023T.  
3. Part numbers denoted EX are extended temperature parts -40C to 85C, electrical specifications @ 25C.
4.  E2023NL is the RoHS compliant version of E2023.
              
USA 858 674 8100 Germany 49 7032 7806 0 Singapore 65 6287 8998 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768
www.pulseeng.com 2 EC100.N (1/10)