AL4V93/95 16K, 64K-Bit Line FIFO Applications Multimedia System Video line capture TBC(Time Base Corrector) Hard Disk cache memory Anti-skip audio data buffer • • • • • • • • Description High performance, low-power, FIFO(FirstIn First-Out) memory 2K x9 bit I/O port (AL4V93) 8K x9 bit I/O port (AL4V95) High clock speed (100MHz) Fully independent read/write access Output enable control (data skipping) 3.3V±10% power supply with 5V tolerant Standard 32-pin TQFP Ordering Information +3.3V±10% 17 Power Supply 18 32-pin plastic TQFP and PLCC 25 16 26 15 27 AVERLOGIC 14 28 AL4V9x x-xx-xx xxxx xxxx 13 29 30 31 12 11 10 32 TQFP PACKAGE TOP VIEW 8 7 5 4 3 2 9 1 AL4V93, AL4V95 Package 19 20 Part number 21 22 23 24 The AL4V93/95 series memory products are high-performance, low-power 9-bit read/write FIFO (First-In-First-Out) memory chips. They are specially designed to buffer high speed streaming data for a wide range of data buffering applications, such as optical disk data caching, video line data buffering. 6 - Features /OE Input data bus WCLK /WEN /WRST Input Buffer (2k, 8k) x9 Memory Array Output Buffer Write Control Logic Write Pointer Output data bus Read Control Logic Read Pointer Offset Regissers RCLK /REN /RRST Timing & Logic Control AL4V9x FIFO Block Diagram The 9-bit input and output ports operate independently at a maximum speed of 100MHz. The built-in address decoder and pointer managing circuits provide a straightforward bus interface to serially read/write memory that reduces inter-chip design efforts. The AL4V9x embedded memory array and high performance process technologies with extended controller functions (read skip, fixed and programmable status flags... etc.) offer flexible memory management. The input data is synchronous with a freerunning clock (WCLK), and input-enable pins (/WEN). Data is written into the FIFO on every clock when enable pins are asserted. The output is synchronous with the other freerunning clock (RCLK) and enables (/REN). An Output Enable pin (/OE) is provided at the read port for tri-state control of the output port. DISTRIBUTED BY: The AL4V9x series are operating in 3.3V power supply with 5V signal tolerant input. These chips are available as a 32-pin TQFP Package. AVERLOGIC TECHNOLOGIES, INC. TEL: 1 408 361-0400 e-mail: [email protected] URL: www.averlogic.com AVERLOGIC TECHNOLOGIES, CORP. TEL: 886 2-87523988 e-mail: [email protected] URL: www.averlogic.com.tw October 30, 2004