The requested file:
https://pdf.datasheetcatalog.com/datasheet/QT/H11AA814.pdf
is the data sheet for the following electronic components:

QT Optoelectronics

#	Part Name	Description
1	H11A817	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
2	H11A817A	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
3	H11A817B	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
4	H11A817C	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
5	H11A817D	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
6	H11AA814	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS
7	H11AA814A	4-PIN PHOTOTRANSISTOR OPTOCOUPLERS

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