CY7C421-25JI Cypress Semiconductor Corp, CY7C421-25JI Datasheet - Page 5

• Manufacturer Part Number: CY7C421-25JI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C421-25JI

• 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: -40C to 85C
• Operating Temperature Classification: Industrial
• 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
Notes:
10. t
Parameter
RC
A
RR
PR
LZR
DVR
HZR
WC
PW
HWZ
WR
SD
HD
MRSC
PMR
RMR
RPW
WPW
RTC
PRT
RTR
7. Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V and output loading of the specified I
8. See the last page of this specification for Group A subgroup testing information.
9. t
capacitance, as in part (a) of AC Test Load and Waveforms, unless otherwise specified.
at ±100 mV from the steady state.
HZR
HZR
[6,9]
[9,10]
[6,9,10]
[6,9]
transition is measured at +200 mV from V
and t
DVR
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
use capacitance loading as in part (b) of AC Test Load and Waveforms.
Description
Over the Operating Range
OL
and –200 mV from V
OH
. t
[7, 8]
Min.
7C419–10
7C421–10
7C425–10
7C429–10
7C433–10
DVR
20
10
10
20
10
10
20
10
10
10
10
20
10
10
3
5
5
6
0
transition is measured at the 1.5V level. t
Max.
10
15
Min.
7C419–15
7C421–15
7C425–15
7C429–15
7C433–15
25
10
15
25
15
10
25
15
10
15
15
25
15
10
3
5
5
8
0
Max.
15
15
CY7C419/21/25/29/33
Min.
7C420–20
7C421–20
7C424–20
7C425–20
7C428–20
7C429–20
7C433–20
30
10
20
30
20
10
12
30
20
10
20
20
30
20
10
3
5
5
0
HWZ
Max.
20
15
and t
OL
LZR
/I
Min.
OH
7C420–25
7C421–25
7C424–25
7C425–25
7C429–25
7C432–25
7C433–25
35
10
25
35
25
10
15
35
25
10
25
25
35
25
10
3
5
5
0
transition is measured
and 30 pF load
Max.
Page 5 of 25
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18
Unit
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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