T1E1 and T3E3 Transformer Se

Abstract: This applicaTIon note lists vender transformers that meet the specificaTIons required for use with Maxim Single-Chip Transceivers (SCTs) and Line Interface Units (LIUs). Recommended transformers are made based on the following transformer specificaTIons: turns raTIo, primary inductance, leakage inductance, interwinding capacitance, and DC resistance for both 5V and 3.3V operation. Actual results are dependant on the integrity of the PCB design and other termination circuitry and should be verified by the customer.

IntroductionThis application note applies to the following products:

T1/E1 LIUs T1 SCTs E1 SCTs T1/E1 SCTs T1/E1 Ethernet/Serial TDM T3/E3 LIUs T3/E3 SCTs DS2148 DS2151 DS2153 DS2156 DS33R11 DS3150 DS3170 DS21348 DS2152 DS2154 DS2155 DS33R41 DS3151 DS3171 DS21Q48 DS21352 DS21354 DS21Q55   DS3152 DS3172 DS21Q348 DS21552 DS21554 DS21455   DS3153 DS3173 DS21448 DS21Q552 DS21Q554 DS21458   DS3154 DS3174 DS2149 DS21Q352 DS21Q354 DS26502   DS3251 DS3181 DS21349 DS2196 DS21Q59 DS26503   DS3252 DS3182 DS26303   DS21Q58 DS26504   DS3253 DS3183 DS26324   DS21Q50 DS26518   DS3254 DS3184 DS26334     DS26519   DS32504         DS26521   DS32506         DS26522   DS32508         DS26524   DS32512         DS26528      
Table 1 shows the specifications for our 5V devices and Table 2 shows the specifications for our 3.3V devices. The specifications for selecting an appropriate transformer are given in the data sheets for each device and repeated below for simplicity. Table 3 lists the transformer part numbers from multiple vendors and matches them with the parts listed above.

Table 1. Transformer Specifications for 5V Operation Specification Recommended Value Turns Ratio, 5V Applications 1:1 (RX) and 1:15 or 1:1.36 (TX) ±5% Primary Inductance 600µH minimum Leakage Inductance 1.0µH maximum Interwinding Capacitance 40pF maximum   Transmit Transformer DC Resistance Primary (Device Side) 1.2Ω maximum Secondary 1.2Ω maximum   Receive Transformer DC Resistance Primary (Device Side) 1.2Ω maximum Secondary 1.2Ω maximum
Table 2. Transformer Specifications for 3.3V Operation Specification Recommended Value Turns Ratio, 3.3V Applications 1:1 (RX) and 1:2 (TX) ±2% Primary Inductance 600µH minimum Leakage Inductance 1.0µH maximum Interwinding Capacitance 40pF maximum   Transmit Transformer DC Resistance Primary (Device Side) 1.0Ω maximum Secondary 2.0Ω maximum   Receive Transformer DC Resistance Primary (Device Side) 1.5Ω maximum Secondary 1.2Ω maximum
Table 3. Transformer Part Information Vendor Part Turns Ratio No.
of Ports Package Type No.
of Pins Temp
Range Hierarchy Maxim Device Pulse PE-65388 1:1.15CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 PE-65586 1:1.36CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 PE-65351 1:2CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 PE-64936 1CT:1 RX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 PE-65565 1:1.15CT and 1:2CT 1 Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TX1315 1CT:1CT RX only Surface Mount 6 -40°C to
+85°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 TX1320 1CT:1.36CT TX Only Surface Mount 6 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 TX1277 1CT:1CT and 1CT:2CT 1 Surface Mount 14 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59, DS33R11, DS33R41 PE-68882 1CT:1.15CT and 1CT:1CT 1 Surface Mount 14 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 PE-64952 1:2CT and 1:1.36 1 Through Hole 14 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 PE-64953 1:2CT and 1:2CT 1 Through Hole 14 0°C to
+70°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 PE-65865 1:1.15CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 T1076 1:1.15CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 T1136 1CT:1CT and 1CT:1.36CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 PE-68678 1CT:1CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 PE-68877 1CT:1CT and 1CT:2CT 1 Surface Mount 12 -40°C to
+85°C T1/E1 DS33R11, DS33R41 T1094 1CT:1CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TX1099 1CT:1:0.8 and 1CT:1:0.8 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21348, DS21Q348, DS21448, DS26502, DS26503, DS26504, DS26521, DS26522, DS33R11 TX1467 1CT:1:1 and 1CT:1:1 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TX1473 1:2 and 1:1 4 Surface Mount 32 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 T1068 1:2CT and 1:1CT 4 Surface Mount 40 0°C to
+70°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TX1475 1CT:1CT and 1CT:2CT 4 Surface Mount 32 -40°C
to
+85°C T1/E1 DS26324, DS26334, DS26518, DS26519, DS26524, DS26528 T1114 1CT:1CT and 1CT:2CT 4 Surface Mount 40 -40°C to
+85°C T1/E1 DS26303 T1108 1:2CT and 1:1CT 4 Surface Mount 40 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TX1292 1:1.36 and 1:1 4 Surface Mount 40 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 PE-65968 1:2CT RX or TX Surface Mount 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184, DS3251, DS3252, DS3253, DS3254 PE-65969 1:2CT RX or TX Through Hole 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3170, DS3171, DS3172, DS3173, DS3174, DS3181, DS3182, DS3183, DS3184 T3002 1:2CT RX or TX Surface Mount 6 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 T3012 1:2CT RX or TX Surface Mount 6 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 T3021 1:2CT and 1:2CT 1 Surface Mount 16 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 T3047 1:1 4 Surface Mount 32 -40°C to
+85°C T3/E3 DS32501, DS32502, DS32503, DS32504, DS32512 T3049 1:2 4 Surface Mount 32 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3170, DS3171, DS3172, DS3173, DS3174, DS3181, DS3182, DS3183, DS3184 HALO Electronics TG38-1505A 1:1.15CT TX only Through Hole 6 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TD70-1205A 1:1.36CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TD15-1205A 1:2CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 TD02-1205A 1CT:1 RX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 TG04-1505NS 1CT:1CT RX only Surface Mount 6 -40°C to
+85°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 TG15-1505NS 1CT:2CT TX only Surface Mount 6 -40°C to
+85°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 TG38-1505NS 1:1.15CT TX only Surface Mount 6 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TG70-1505NS 1:1.36CT TX only Surface Mount 6 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TD63-1505D 1:1.15CT and 1:2CT 1 Through Hole 14 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TG63-1505N1 1:1.15CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TG35-1505N1 1CT:1.15CT and 1CT:1CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 TGSP-1467N1 1CT:1:1 and 1CT:1:1 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TG28-1505N1 1CT:1CT and 1CT:1.36C 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 TG74-1205N1 1CT:1CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 TG83-S006NU 1:2 and 1:1 4 Surface Mount 32 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 TG74-1205N1 1CT:1CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 TG07-0206NS 1:2CT TX or RX only Surface Mount 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154 TD07-0206NE 1:2CT TX or RX only Through Hole 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154 TG07-0356NS 1:2CT TX or RX only Surface Mount 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154 TG07-0406N1 1:2CT and 1:2CT 1 Surface Mount 16 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154 TG05-0206NU 1:2 4 Surface Mount 32 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154 Bel S553-3855-02 1:1.15CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 S553-0013-02 1:2CT and 1:1.36 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 S553-0013-01 1CT:2CT and 1:1 1 Surface Mount 16 0°C to
+70°C T1/E1 DS21352, DS21354, DS2148, DS2155, DS2196, DS21Q352, DS21Q354, DS21Q48 S554-3184-01 1:2CT 1 Surface Mount 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 0554-3184-01 1:2CT 1 Through Hole 6 0°C to
+70°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 S553-6500-H5 1CT:1:1 and 1CT:1:1 4 Surface Mount 32 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21554, DS21Q552, DS21Q554 S554-6500-21 1:2 4 Surface Mount 32 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 S553-6500-C8 1:2 and 1:1 4 Surface Mount 32 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 0553-0013-RC 1:1.15CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 0553-0013-BC 1CT:1 RX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 0553-0013-1J 1:2CT and 1:2CT 1 Through Hole 14 0°C to
+70°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 0553-0013-2J 1:2CT and 1:1.36 1 Through Hole 14 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 T2099S 1CT:1CT and 1CT:1.36CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS2148, DS21Q48, DS21552, DS21Q552, DS21554, DS21Q554 T2006 1:1.15CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 T2007 1:1.36CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 T2028S 1:1.15CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 T0034 1:2CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 S553-6500-76 1CT:1CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2196, DS21348, DS21Q348, DS21448, DS21352, DS21Q352, DS21354, DS21Q354 S553-6500-E6 1CT:1CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS21348, DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 S553-6500-H6 1CT:1:0.8 and 1CT:1:0.8 1 Surface Mount 32 -40°C to
+85°C T1/E1 DS21348, DS21Q348, DS21448, DS2155, DS2156 Coev PT-311 1:1.36CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 PT-311ET 1:1.36CT TX only Through Hole 6 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS21Q552, DS21554, DS21Q554 PT-306 1:2CT TX only Through Hole 6 0°C to
+70°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 PT-306ET 1:2CT TX only Through Hole 6 -40°C to
+85°C T1/E1 DS2155, DS2156, DS21Q55, DS21455, DS21458, DS21Q50, DS21Q58, DS21Q59 PT-312 1CT:1 RX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 PT-312ET 1CT:1 RX only Through Hole 6 -40°C to
+85°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 PT-323 1:1 RX only Through Hole 6 0°C to
+70°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 PT-323ET 1:1 RX only Through Hole 6 -40°C to
+85°C T1/E1 DS2196, DS2151, DS2152, DS2153, DS2154, DS21348, DS21Q348, DS21448, DS2148, DS21Q48, DS21352, DS21Q352, DS21354, DS21Q354, DS21552, DS2121Q552, DS21554, DS21Q554 SMD601-05 1:1.15CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 SMD601-05ET 1:1.15CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS2151, DS2152, DS2153, DS2154, DS21552, DS21Q552, DS21554, DS21Q554 SMD606-05 1CT:1CT and 1CT:2CT 1 Surface Mount 16 0°C to
+70°C T1/E1 DS21352, DS21354 SMD606-05ET 1CT:1CT and 1CT:2CT 1 Surface Mount 16 -40°C to
+85°C T1/E1 DS21352, DS21354 SM01-T304M 1:2CT 1 Surface Mount 6 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184 MGBBT-00019 1:2 4 Surface Mount 32 -40°C to
+85°C T3/E3 DS3150, DS3151, DS3152, DS3153, DS3154, DS3181, DS3182, DS3183, DS3184

T1/E1 and T3/E3 Transformer Selection InformationIf you have further questions on T1/E1 or T3/E3 transformer selection for our devices, please contact the Telecommunication Applications support team by email at telecom.support@dalsemi.com, or call 01-972-371-6555. For more information about specific transformers, please consult the manufacturers using the information listed below.

Vendor List Address Phone Fax Website Pulse Engineering Inc.
12220 World Trade Drive
San Diego, CA 92128 858-674-8100 858-674-8262 www.pulseeng.com HALO Electronics Inc.
1861 Landings Drive
Mountain View, CA 94043 650-903-3800 650-903-9300 www.haloelectronics.com Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302 201-432-0463 201-432-9542 www.belfuse.com Coev Magnetics (Tyco)
3003 9th Avenue SW
Watertown, SD 57201 605-886-3326 605-884-3640 www.coev.net