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CY7C421 Datasheet(PDF) 8 Page - Cypress Semiconductor

Part # CY7C421
Description  256/512/1K/2K/4K x 9 Asynchronous FIFO
PDF  25 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C421 Datasheet(HTML) 8 Page - Cypress Semiconductor

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CY7C419/21/25/29/33
Document #: 38-06001 Rev. *B
Page 8 of 25
Switching Waveforms
Asynchronous Read and Write
Master Reset
Half-full Flag
Notes:
11. W and R
≥ V
IH around the rising edge of MR.
12. tMRSC = tPMR + tRMR.
DATA VALID
DATA VALID
DATA VALID
DATA VALID
tSD
tHD
tRC
tPR
tA
tRR
tA
tLZR
tDVR
tHZR
tWC
tPW
tWR
R
Q0–Q 8
W
D0–D 8
MR
R,W
HF
FF
EF
tMRSC
tPMR
tEFL
tHFH
tFFH
tRPW
tWPW
tRMR
[11]
[12]
HALF FULL+1
HALF FULL
HALF FULL
W
R
HF
tWHF
tRHF



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