CY7C421-40PC Cypress Semiconductor Corp, CY7C421-40PC Datasheet - Page 9

• Manufacturer Part Number: CY7C421-40PC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C421-40PC

• Configuration: Dual
• Density: 4.5Kb
• Access Time (max): 40ns
• Word Size: 9b
• Organization: 512x9
• Sync/async: Asynchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: PDIP
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 35mA
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 28
• Lead Free Status / Rohs Status: Not Compliant

Switching Waveforms
Document #: 38-06001 Rev. *D
DATA OUT
DATA OUT
DATA IN
DATA IN
EF
FF
W
W
R
R
t
A
(continued)
Figure 10. Empty Flag and Read Data Flow-through Mode
Figure 11. Full Flag and Write Data Flow-through Mode
DATA VALID
t
WEF
t
t
RFF
t
WAF
RAE
t
HWZ
t
REF
t
WFF
t
WPF
t
DATA VALID
t
A
RPE
DATA VALID
t
SD
t
HD
CY7C419/21/25/29/33
Page 9 of 16
[+] Feedback
[+] Feedback
[+] Feedback