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)