DP8521AV

The DP8521AV is designed as the video RAM controller that provides a low cost, single chip interface between video RAM and all 8-, 16- and 32-bit systems. And this device generates all the required access control signal timing for VRAMs. An on-chip refresh request clock is used to automatically refresh the VRAM array.

Features of the DP8521AV are:(1)on chip high precision delay line to guarantee critical VRAM access timing parameters; (2)microCMOS process for low power; (3)high capacitance drivers for RAS, CAS, DT/OE and VRAM address on chip; (4)on chip support for nibble, page and static column VRAMs; (5)byte enable signals on chip allow byte writing in a word size up to 16 bits with no external logic; (6)selection of controller speeds: 20 MHz and 25 MHz; (7)on board Port A/Port B (DP8522A only)/refresh arbitration logic; (8)direct interface to all major microprocessors (application notes available); (9)4 RAS and 4 CAS drivers (the RAS and CAS configuration is programmable).

The absolute maximum ratings of the DP8521AV can be summarized as:(1)temperature under bias:0 to +70C;(2)storage temperature:-65 to +150;(3)all input or output voltage with respect to GND:-0.5V to +7V;(4)power dissipation @ 20 MHz: 0.5 W. If you want to know more information such as the electrical characteristics about the DP8521AV, please download the datasheet in www.seekic.com or www.chinaicmart.com .