CY7C4421V Datasheet, PDF (6/17 Pages) Cypress Semiconductor – Low-Voltage 64/256/512/1K/2K/4K/8K x 9 Synchronous FIFOs

CY7C4421V/4201V/4211V/4221V
CY7C4231V/4241V/4251V
RESET (RS)
DATA IN (D) _{18 9}
WRITE CLOCK (WCLK)
WRITE ENABLE 1 (WEN1)
WRITE ENABLE 2/LOAD
(WEN2/LD)
PROGRAMMABLE (PAF)
FULL FLAG (FF) # 1
CY7C42X1V
EF
FF
FULL FLAG (FF) # 2
9
Read Enable 2 (REN2)
RESET (RS)
9
READ CLOCK (RCLK)
READ ENABLE 1 (REN1)
CY7C42X1V
OUTPUT ENABLE (OE)
PROGRAMMABLE (PAE)
EMPTY FLAG (EF) #1
EF EMPTY FLAG (EF) #2
FF
9 ^{DATA OUT (Q)} 18
Read Enable 2 (REN2)
Figure 2. Block Diagram of 64 x 9, 256 x 9, 512 x 9, 1024 x 9, 2048 x 9, 4096 x 9, 8192 x 9 Low-Voltage Synchronous FIFO
Memory Used in a Width-Expansion Configuration
Document #: 38-06010 Rev. *A
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