L56DLI = DSP1641B + CSP1034AH (MQFP) (Desktop) L56DL = DSP1641C + CSP1034AH (MQFP) [+ optional PNP1A] (Desktop) L56LLI = DSP1641B + CSP1034AH (TQFP) (Laptop) L56LL = DSP1641C + CSP1034AH (TQFP) [+ optional PNP1A] (Laptop) 1034AH Line Codec 44-pin MQFP or 48-pin TQFP 1641B DSP Data/Fax/TAM/PnP 144-pin TQFP 1641C DSP Data/Fax/TAM 126-pin TQFP PNP1A 100-pin MQFPTFQP=Thin Quad Flat Package