This part is a kind of semiconductor called AD7528.

Function of this product has CMOS Dual 8-Bit Buffered Multiplying DAC.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

a FEATURES On-Chip Latches for Both DACs +5 V to +15 V Operation DACs Matched to 1% Four Quadrant Multiplication TTL/CMOS Compatible Latch Free (Protection Schottkys not Required) APPLICATIONS Digital Control of: Gain/Attenuation Filter Parameters Stereo Audio Circuits X-Y Graphics VDD DB0 DATA INPUTS DB7 CMOS Dual 8-Bit Buffered Multiplying DAC AD7528 FUNCTIONAL BLOCK DIAGRAM VREF A RFB A INPUT BUFFER OUT A LATCH DAC A AGND DAC A/ DAC B CS WR LATCH DGND DAC B CONTROL LOGIC AD7528 RFB B OUT B VREF B GENERAL DESCRIPTION ORDERING GUIDE1 Model2 AD7528JN AD7528KN AD7528LN AD7528JP AD7528KP AD7528LP AD7528JR AD7528KR AD7528LR AD7528AQ AD7528BQ AD7528CQ AD7528SQ AD7528TQ AD7528UQ Temperature Ranges –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85 [ ... ]

AD7528 PDF Datasheet Download