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MJQ - IC Transformer Selection Guide for T1/E1/CEPT/ISDN Quad Port

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IC
Manufacturer		 IC
Part Number		 Application Turns Ratio
Pri:Sec ±2%		 Part Number
Transmit Receive
Cirrus
(Crystal)		  C861534, 61535, 61544, 61574, 1585 T1 & PCM-30 1:2CT 1:2CT MJQ-006-40
 C861535A, C861574A, C861575, C86158A T1 1:1.15 1:2CT MJQ-002-40
 C861535A, C861574A, C861575, C86158A E1 1:2CT 1:2CT MJQ-006-40
 C86152 - 1:1.36CT 1:2CT MJQ-001-40
 C861583 T1 / E1 (3.3 V) 1:2 1:2 MJQ-017-40
 C861583 T1 / E1 (5.0 V) 1:1.15 1:1.15 MJQ-015-40
 C861584, C861584A IQ3 1:2CT 1:2CT MJQ-006-40
Dallas  DS2186, DS2187 - 1:1.36CT 1:2CT MJQ-001-40
 DS2151, DS2152, DS2153, DS2154 T1 / E 1 - Note 1 1:1.36CT 1:2CT MJQ-001-40
 DS21Q352, DS21Q354 3V Quadro 1:2CT 1:1CT MJQ-003-40
 DS21Q552, DS21Q554 5V Quadro 1:1.36CT 1:2CT MJQ-001-40
Exar  T5650, T5620, T5675, T5681, T5683 - 1:2CT 1:2CT MJQ-006-40
 56L22, 56L85, C240, C260, C262, C277 - 1:2CT 1:2CT MJQ-006-40
 T5793, T5794 Quad E1 - Note 2 1:1/1.26CT 1:2CT MJQ-007-40
 T5684 T1 1:1.36CT 1:2CT MJQ-001-40
 T7288 CEPT 1:1.36CT 1:2CT MJQ-001-40
 T5894 Quadro E1 1:2CT 1:2CT MJQ-006-40
 T5897 7 Kanal E1 1:2CT 1:2CT MJQ-006-40
Infineon
(Siemens)		  PEB2254, PEB2255 5V 1CT:1.41 1CT:1.41 MJQ-016-40
 PEB22554, PEB22504 3.3V 1:2.4 1:1 MJQ-022-40
 PEB22504 5V 1:1.5 1.41:1 MJQ-026-40
Level One  LXT300/301/305 - 1:2CT 1:2CT MJQ-006-40
 LXT304A/305A T1 1:1.15 1:2CT MJQ-002-40
 LXT304A/305A PCM-30/75/120° - Note 2 1:1/1.26 1:2CT MJQ-007-40
 LXT310/311 - 1:2CT 1:1CT MJQ-003-40
 LXT317/318 T1 / E1 1:2CT 1:2CT MJQ-006-40
 LXT317/318 T1 / E 1 - Optional 1:2 1:2CT MJQ-021-40
 LXT317/318 T1 / E 1 - Optional 1:2CT 1:1CT MJQ-003-40
 LXT331 E1 1:2CT 1:1CT MJQ-003-40
 LXT332 E1 1:2CT 1:2CT MJQ-006-40
 LXT332 E1 - Valgfri 1:2 1:2CT MJQ-021-40
 LXT334 Quadro E1 1:1.36CT 1:2CT MJQ-001-40
 LXT334 Quadro T1 1:2CT 1:1CT MJQ-003-40
 LXT335 Quadro E1 1:1.36CT 1:2CT MJQ-001-40
 LXT360/361/370 T1 / E1 1:2CT 1:1CT MJQ-003-40
 LXT380/381/384/386/388 T1 / E1 1:2CT 1:1CT MJQ-003-40
 LXT380/381/384/386/388 T1 / E1 1:2CT 1CT:2 MJQ-020-40
Lucent  T7288 CEPT 1:1.36CT 1:2CT MJQ-001-40
 T7289 DS1 1:1.15 1:2CT MJQ-002-40
 T7290 T1 & CEPT 1:1.36CT 1:2CT MJQ-001-40
 T7633 Quadro T1 / E1 1:2.1CT 1:2.1CT MJQ-029-40
 T7683 Quadro T1 1:2CT 1:2CT MJQ-006-40
 T7688 Quadro E1 1:1.36 1:1.36CT MJQ-012-40
 T7689 Quadro T1 1:1.14 1:1.14CT MJQ-009-40
 T7690 DS1 1:1.14 1:1.14CT MJQ-009-40
 T7690 CEPT 1:1.36 1:1.36CT MJQ-012-40
PMC-Sierra  PM4341, PM6341 - 1:1.36CT 1:2CT MJQ-001-40
 PM4314 - 1:1.36CT 1:2CT MJQ-001-40
 PM4351 Comet 1:2.42 1:2.42 MJQ-028-40
Conexant
Systems
(Rockwell)		  BT8370 T1 / E1 1:1.36CT 1:2CT MJQ-001-40
 CN8380 T1 / E1 1:2CT 1CT:2 MJQ-020-40
 R8069, R8069A, R8069B - 1:2CT 1:1CT MJQ-003-40
VLSI  VP14Q574 T1 1:1.15 1:2CT MJQ-002-40
 VP14Q574 E1 1:1.15 1:2CT MJQ-002-40
 VP14Q575 T1 1:1.15 1:2CT MJQ-002-40
 VP14Q575 E1 75R 1:1.15 1:2CT MJQ-002-40

Notes:
  1. Dallas IC's use either a 1:1,15 or a 1:1.36 ratio transformer depending on the application. Consult the Dallas application notes or contact us.
  2. To obtain a 1:1 secondary ratio connect the following secondary contacts: 39-40, 34-35, 39-30 and 24-25; a secondary ratio of 1:1.26 is obtained by connecting contacts: 38-40, 33-35, 28-30 and 23-25.