CY7C421-20VXCT Cypress Semiconductor Corp, CY7C421-20VXCT Datasheet - Page 7

• Manufacturer Part Number: CY7C421-20VXCT
• Description: CY7C421-20VXCT
• Manufacturer: Cypress Semiconductor Corp
• Series: CY7Cr

Specifications of CY7C421-20VXCT

• Function: Asynchronous
• Memory Size: 4.6K (512 x 9)
• Data Rate: 50MHz
• Access Time: 10ns
• Voltage - Supply: 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOJ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Switching Waveforms
Document #: 38-06001 Rev. *C
Notes
11. W and R ≥ V
12. t
MRSC
= t
R, W
PMR
Q
D
0
0
[11]
IH
–Q
–D
MR
HF
HF
EF
FF
+ t
W
R
W
around the rising edge of MR
R
RMR
8
8
.
HALF FULL
t
LZR
t
PW
t
A
Figure 4. Asynchronous Read and Write
t
t
WHF
RC
t
t
t
SD
t
HFH
FFH
EFL
DATA VALID
t
WC
DATA VALID
Figure 5. Master Reset
Figure 6. Half-full Flag
t
t
PMR
MRSC
t
RR
t
DVR
t
HD
[12]
t
WR
t
A
t
PR
HALF FULL+1
t
t
WPW
RPW
DATA VALID
t
RMR
DATA VALID
t
HZR
CY7C419/21/25/29/33
t
RHF
HALF FULL
Page 7 of 17
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