Level One Cross Reference

  Level One       Cirrus         Hardware Compatible           Software Compatible    Same Transformer                            Comments                                    New Design-in Changes

  LXT300Z        CS61577                  Yes                         Yes                    Yes             6Hz knee (C) vs 3Hz (L)                                None known
  LXT301Z        CS61577                  Yes                         Yes                    Yes                                                                    None known

  LXT304A        CS61575                  Yes                         Yes            Application dependant   Tx low (C) vs HiZ (L) when no TCLK                     CS61575 (Need new transformers or remove
                                                                                                                                                                    R3&R4). Review Data Sheet for Specifics

  LXT305A       CS61535A                  Yes                         Yes                    Yes             (C) has wider RCLK duty cycle                          CS61535A (Need to remove the 100kohm
                                                                                                                                                                    resister tied to 5v supply at pin23)


   LXT307        CS61577                  Yes                         Yes            Application dependant   (C) E1/T1 VS. (L) E1,no Jitter attenuation, AMI only   Need different turns.


   LXT307       CS61304A                  Yes                         Yes                    Yes             (C) E1/T1 VS. (L) E1,no Jitter attenuation, AMI only   CS61575 (Need new transformers)


   LXT310        CS61581                  Yes                         Yes                    Yes             T1/E1 LH/SH (C) vs T1 LH (L)                           None known

   LXT318        CS61581                  Yes                         Yes                    Yes             T1/E1 LH/SH (C) vs E1 LH (L). Software compatible in None known
                                                                                                             in Host mode only
   LXT332       CS61584A        Yes with minor changes                 No                    Yes             3.3/5V, T1/E1, JTAG, Arbitrary Waveform Generator,     None known
                            (specifically changing 5V supply                                                 Match Impedance Transmitters, Excessive Zero
                                   with a 3.3V supply)                                                       Detection, Individual channel power down, Local
                                                                                                             Loopback 2 (C) vs 5V only, T1/E1, QRSS
                                                                                                             Generator, DFM, high freq output clock (L)

   LXT350        CS61581        Yes with minor changes                 No                    Yes             T1/E1 LH/SH (C) vs T1/E1 SH (L)                        None known
                            (specifically changing 5V supply
                                   with a 3.3V supply)
   LXT359        CS61581        Yes with minor changes                 No                    Yes             T1/E1 LH/SH (C) vs T1 LH/SH (L)                        None known
                            (specifically changing 5V supply
                                   with a 3.3V supply)
   LXT360        CS61581        Yes with minor changes                 No                    Yes             T1/E1 LH/SH (C) vs T1/E1 LH/SH (L); TX Impedance       Remove external resistors on TX
                            (specifically changing 5V supply                                                 matching, AWG(C); 40% lower power(L)                   line(R3/R4)
                                   with a 3.3V supply)
   LXT38x        CS6158x        Yes with minor changes                Yes            Application dependant   15% lower power. Matched impedance output(fewer        CS61581, CS61583, CS61584A
                            (specifically changing 5V supply                                                 external components. True 3.3V operation.(C)
                                   with a 3.3V supply)                                                       Needs 5V for Transmitter to maintain return loss (L)


   LTX381        CS61884        Yes with minor changes                N/A                     No             15% lower power, lower return loss                     None known
                            (specifically changing 5V supply
                                   with a 3.3V supply)

   LTX380        CS61880        Yes with minor changes                Yes                     No             15% lower power, AWG                                   None known
                            (specifically changing 5V supply
                                   with a 3.3V supply)



   LXT384        CS61884        Yes with minor changes                Yes                    Yes             15% lower power, AWG, internal imp matching,           None known
                            (specifically changing 5V supply                                                 customizable pulses,IEEE 1194.1 Only, 3.3V(no 5V
                                   with a 3.3V supply)                                                       supply needed) (C) vs. 5V needed to maintain
                                                                                                             return loss, (L)
   LXT970         CS8952                  Yes                         Yes                     NA             Need re-routing of signals but same footprint. AN127 CS8952 (8952T being not supported)