(China (Mainland))
Product Summary
The AL422B is a 3M-Bits FIFO Field Memory, and is configured as 393,216 words x 8 bit FIFO (first in first out). The AL422B is very user-friendly since all complicated DRAM operations are already managed by the internal DRAM controller. Current sources of similar memory (field memory) in the market provide limited memory size which is only enough for holding one TV field, but not enough to hold a whole PC video frame which normally contains 640x480 or 720x480 bytes. The AL422B provides 50% more memory to support high resolution for digital PC graphics or video applications. The 50% increase in speed also expands the range of applications.
Parametrics
AL422B absolute maximum ratings: (1)VDD Supply Voltage: -1.0 ~ +7.0 V; (2)VP Pin Voltage: -1.0 ~ VDD +0.5 V; (3)IO Output Current: -20 ~ +20 mA; (4)TAMB Ambient Op. Temperature: 0 ~ +70 °C; (5)Tstg Storage temperature: -55 ~ +125 °C.
Features
AL422B features: (1)384K (393,216)x 8 bits FIFO organization; (2)Support VGA, CCIR, NTSC, PAL and HDTV resolutions; (3)Independent read/write operations (different I/O data rates acceptable); (4)High speed asynchronous serial access; (5)Read/write cycle time: 20ns; (6)Access time: 15ns; (7)Output enable control (data skipping); (8)Self refresh; (9)5V or 3.3V power supply; (10)Standard 28-pin SOP package.
Diagrams
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