The requested file:
https://pdf.datasheetcatalog.com/datasheets2/32/320059_1.pdf
is the data sheet for the following electronic components:

Mitel Semiconductor

#	Part Name	Description
1	MT8880	ISO2-CMOS Integrated DTMFTransceiver
2	MT8880CC	ISO2-CMOS Integrated DTMFTransceiver
3	MT8880CC-1	ISO2-CMOS Integrated DTMFTransceiver
4	MT8880CC/CC-1	Integrated DTMFTransceiver
5	MT8880CE	ISO2-CMOS Integrated DTMFTransceiver
6	MT8880CE-1	ISO2-CMOS Integrated DTMFTransceiver
7	MT8880CE/CE-1	Integrated DTMFTransceiver
8	MT8880CN	ISO2-CMOS Integrated DTMFTransceiver
9	MT8880CN-1	ISO2-CMOS Integrated DTMFTransceiver
10	MT8880CN/CN-1	Integrated DTMFTransceiver
11	MT8880CP	ISO2-CMOS Integrated DTMFTransceiver
12	MT8880CP-1	ISO2-CMOS Integrated DTMFTransceiver
13	MT8880CP/CP-1	Integrated DTMFTransceiver
14	MT8880CS	ISO2-CMOS Integrated DTMFTransceiver
15	MT8880CS-1	ISO2-CMOS Integrated DTMFTransceiver
16	MT8880CS/CS-1	Integrated DTMFTransceiver

Select the part name and then you can download the datasheet in PDF format.