CY7C43643 Datasheet, PDF (1/29 Pages) Cypress Semiconductor – 1K/4K/16K x36 Unidirectional Synchronous FIFO with Bus Matching

CY7C43643
CY7C43663
CY7C43683
1K/4K/16K x36 Unidirectional Synchronous
FIFO with Bus Matching
Features
• High-speed, low-power, Unidirectional, First-in,
First-out (FIFO) memories w/bus matching capabilities
• 1Kx36 (CY7C43643)
• 4Kx36 (CY7C43663)
• 16Kx36 (CY7C43683)
• 0.35-micron CMOS for optimum speed/power
• High-speed 133-MHz operation (7.5 ns read/write cycle
times)
• Low power
— I_CC = 100 mA
— I_SB = 10 mA
Table 1.
Logic Block Diagram
• Fully asynchronous and simultaneous read and write
operation permitted
• Mailbox bypass register for each FIFO
• Parallel and Serial Programmable Almost Full and
Almost Empty flags
• Retransmit function
• Standard or FWFT mode user selectable
• Partial Reset
• Big or Little Endian format for word or byte bus sizes
• 128-pin TQFP packaging
• Easily expandable in width and depth
CLKA
CSA
W/RA
ENA
MBA
RT
MRS1
MRS2
PRS
FF/IR
AF
SPM
FS0/SD
FS1/SEN
A_0–35
Port A
Control
Logic
FIFO,
Mail1
Mail2
Reset
Logic
36
Mail1
Register
1K/4K/16K
x36
Dual Ported
Memory
Write
Pointer
Read
Pointer
Status
Flag Logic
Programmable
Flag Offset
Registers
Timing
Mode
Port B
Control
Logic
MBF1
CLKB
CSB
W/RB
ENB
MBB
BE
BM
SIZE
EF/OR
AE
36
B_0–35
BE/FWFT
MBF2
Mail2
Register
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-06021 Rev. *B
Revised December 26, 2002