CY7C421-40JC Cypress Semiconductor Corp, CY7C421-40JC Datasheet - Page 7

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

Specifications of CY7C421-40JC

• Density: 4Kb
• Word Size: 9b
• Sync/async: Asynchronous
• Expandable: Yes
• Package Type: LCC
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06001 Rev. *B
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RC
A
RR
PR
LZR
DVR
HZR
WC
PW
HWZ
WR
SD
HD
MRSC
PMR
RMR
RPW
WPW
RTC
PRT
RTR
EFL
HFH
FFH
REF
RFF
WEF
WFF
WHF
RHF
RAE
RPE
WAF
WPF
XOL
XOH
Parameter
[6,9]
[9,10]
[6,9,10]
[6,9]
Read Cycle Time
Access Time
Read Recovery Time
Read Pulse Width
Read LOW to Low Z
Data Valid After Read HIGH
Read HIGH to High Z
Write Cycle Time
Write Pulse Width
Write HIGH to Low Z
Write Recovery Time
Data Set-Up Time
Data Hold Time
MR Cycle Time
MR Pulse Width
MR Recovery Time
Read HIGH to MR HIGH
Write HIGH to MR HIGH
Retransmit Cycle Time
Retransmit Pulse Width
Retransmit Recovery Time
MR to EF LOW
MR to HF HIGH
MR to FF HIGH
Read LOW to EF LOW
Read HIGH to FF HIGH
Write HIGH to EF HIGH
Write LOW to FF LOW
Write LOW to HF LOW
Read HIGH to HF HIGH
Effective Read from Write HIGH
Effective Read Pulse Width After EF HIGH
Effective Write from Read HIGH
Effective Write Pulse Width After FF HIGH
Expansion Out LOW Delay from Clock
Expansion Out HIGH Delay from Clock
Over the Operating Range
Description
[7, 8]
(continued)
Min.
40
10
30
40
30
10
18
40
30
10
30
30
40
30
10
30
30
7C419–30
7C421–30
7C424–30
7C425–30
7C429–30
7C433–30
3
5
5
0
Max.
30
20
40
40
40
30
30
30
30
30
30
30
30
30
30
Min.
50
10
40
50
40
10
20
50
40
10
40
40
50
40
10
40
40
7C419–40
7C420–40
7C421–40
7C424–40
7C425–40
7C429–40
7C432–40
7C433–40
3
5
5
0
CY7C419/21/25/29/33
Max.
40
20
50
50
50
35
35
35
35
35
35
35
35
40
40
Min.
80
15
65
80
65
15
30
80
65
15
65
65
80
65
15
65
65
7C420–65
7C421–65
7C424–65
7C425–65
7C428–65
7C429–65
7C433–65
3
5
5
0
Max.
65
20
80
80
80
60
60
60
60
60
60
60
60
65
65
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Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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