CY7C43642 Datasheet, PDF (1/30 Pages) Cypress Semiconductor – 1K/4K/16K x36 x2 Bidirectional Synchronous FIFO

CY7C43642
CY7C43662
CY7C43682
1K/4K/16K x36 x2 Bidirectional
Synchronous FIFO
Features
• High-speed, low-power, bidirectional, First-In, First-Out
(FIFO) memories
• 1Kx36x2 (CY7C43642)
• 4Kx36x2 (CY7C43662)
• 16Kx36x2 (CY7C43682)
• 0.35-micron CMOS for optimum speed/power
• High speed 133-MHz operation (7.5-ns read/write cycle
times)
Logic Block Diagram
• Low power
— I_CC= 100 mA
— I_SB= 10 mA
• Fully asynchronous and simultaneous read and write
operation permitted
• Mailbox bypass register for each FIFO
• Parallel Programmable Almost Full and Almost Empty
flags
• Retransmit function
• Standard or FWFT mode user selectable
• 120-pin TQFP packaging
• Easily expandable in width and depth
CLKA
CSA
W/RA
ENA
MBA
RT2
RST1
FFA/IRA
AFA
FS0
FS1
A_0–35
EFA/ORA
AEA
Port A
Control
Logic
FIFO1,
Mail1
Reset
Logic
MBF2
Mail1
Register
1K/4K/16K
x36
Dual Ported
Memory
Write
Pointer
Read
Pointer
Status
Flag Logic
Programmable
Flag Offset
Registers
Timing
Mode
Status
Flag Logic
Write
Pointer
Read
Pointer
256/512/1K
4K/16K x36
Dual Ported
Memory
Mail2
Register
Port B
Control
Logic
MBF1
CLKB
CSB
W/RB
ENB
MBB
RT1
EFB/ORB
AEB
B_0–35
FWFT/STAN
FFB/IRB
AFB
FIFO2,
Mail2
Reset
Logic
RST2
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-06019 Rev. *B
Revised December 26, 2002