Description
The AL440B is a high-performance FIFO (First-In-First-Out) field memory chip designed to buffer audio/video/graphic digital data for a wide range of applications.
The AL440B FIFO memory provides completely independent 8bit input and output ports that can operate at a maximum speed of 80 MHz. The built-in address and pointer control circuits provide a straightforward bus interface to serially read/write memory that can reduce inter-chip design efforts. Manufactured using a state-of-the-art embedded high density memory cell array, the AL440B uses high performance process technologies with extended controller functions (write mask, read skip, window mode read/write .. etc.), allowing easy operation of non-linearity and regional read/write FIFO for PIP, Digital TV, security system and video camera applications.

FEATUREs
• 4Mbits (512k x 8 bits) organization FIFO
• Independent 8-bit data I/O port operations
• Available in 2 speed grades: 80 and 40Mhz
• Input Enable control (write mask)
• Output Enable control (data skipping)
• Supports Input ready/Output ready flags
• Selectable control signal polarity
• Programmable window mode data access
   with mirroring function support
• Self-refresh
• 5V signals input tolerance
• 3.3V±10% power supply
• Standard 44-pin TSOP (II) package

APPLICATIONs
- Multimedia systems
- Video capture or editing systems for
   NTSC/PAL or SVGA resolution
- Security systems
- Scan rate converter
- PIP(Picture In Picture) video display
- TBC(Time Base Correction)
- Frame Synchronizer
- Digital Video Camera
- Hard Disk cache memory
- Buffer for Communication System

* 80MHz High-Speed Version
- DTV/HDTV video stream buffer