DS2148 データシートの表示（PDF） - Maxim Integrated

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DS2148

5V E1/T1/J1 Line Interface Unit

Maxim Integrated 

DS2148/DS21Q48

1.2 Document Revision History

1) 100Ω/60Ω termination reversed in Internal Rx Termination Select tables, 091799.

2) Add DS21Q48 pinout, 092899.

3) Correct VSM pin number in Q48 (12 x 12 BGA) from G5 to G4, 120699.

4) Add timing diagram for Status Register (write access mode); Add mechanical dimensions for the

quad version, 032900.

5) Timing diagram for Status Register (write access mode) added; elaboration on burst mode bit; add

mechanical dimensions for the quad version, 050300.

6) Changes to datasheet to indicate 5V only part, 011801.

7) Added supply current measurement; added thermal characteristics of quad package, 092001.

8) Corrected typos and removed instances of 3V operation, 082504.

9) In Absolute Maximum Ratings, changed the spec for soldering temperature from IPC/JEDEC J-STD-

020A to J-STD-020; defined the storage temperature range as –55°C to +125°C.

10) Added lead-free packages to Ordering Information table on page 1; updated style of data sheet,

011206.

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