CY7C421-15VI Cypress Semiconductor Corp, CY7C421-15VI Datasheet - Page 9

• Manufacturer Part Number: CY7C421-15VI
• Description: FIFO Mem Async Dual Depth/Width Uni-Dir 512 x 9 28-Pin SOJ
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C421-15VI

• Package: 28SOJ
• Configuration: Dual
• Bus Directional: Uni-Directional
• Density: 4.5 Kb
• Organization: 512x9
• Data Bus Width: 9 Bit
• Timing Type: Asynchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: -40 to 85 °C

Document #: 38-06001 Rev. *B
Switching Waveforms
Last Write to First Read Full Flag
Last Read to First Write Empty Flag
Retransmit
Notes:
13. EF, HF and FF may change state during retransmit as a result of the offset of the read and write pointers, but flags will be valid at t
14. t
DATA OUT
RTC
= t
FL/RT
PRT
R,W
FF
EF
W
W
R
R
[13]
+ t
RTR
.
t
t
REF
WFF
LAST WRITE
LAST READ
t
A
(continued)
VALID
t
PRT
t
RTC
[14]
FIRST WRITE
FIRST READ
t
t
WEF
RFF
t
RTR
ADDITIONAL
ADDITIONAL
WRITES
READS
FIRST WRITE
FIRST READ
CY7C419/21/25/29/33
VALID
RTC
.
Page 9 of 25
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