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CY7C421-10JC Datasheet(PDF) 5 Page - Cypress Semiconductor

Part # CY7C421-10JC
Description  256/512/1K/2K/4K x 9 Asynchronous FIFO
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C421-10JC Datasheet(HTML) 5 Page - Cypress Semiconductor

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CY7C419/21/25/29/33
Document #: 38-06001 Rev. *C
Page 5 of 17
Switching Characteristics Over the Operating Range[7, 8]
Parameter
Description
–10
–15
–20
–25
Unit
Min
Max
Min
Max
Min
Max
Min
Max
tRC
Read Cycle Time
20
25
30
35
ns
tA
Access Time
10
15
20
25
ns
tRR
Read Recovery Time
10
10
10
10
ns
tPR
Read Pulse Width
10
15
20
25
ns
tLZR[6,9]
Read LOW to Low Z
3
3
3
3
ns
tDVR[9,10]
Data Valid After Read HIGH
5
5
5
5
ns
tHZR[6,9,10]
Read HIGH to High Z
15
15
15
18
ns
tWC
Write Cycle Time
20
25
30
35
ns
tPW
Write Pulse Width
10
15
20
25
ns
tHWZ[6,9]
Write HIGH to Low Z
5
5
5
5
ns
tWR
Write Recovery Time
10
10
10
10
ns
tSD
Data Set-Up Time
6
8
12
15
ns
tHD
Data Hold Time
0
0
0
0
ns
tMRSC
MR Cycle Time
20
25
30
35
ns
tPMR
MR Pulse Width
10
15
20
25
ns
tRMR
MR Recovery Time
10
10
10
10
ns
tRPW
Read HIGH to MR HIGH
10
15
20
25
ns
tWPW
Write HIGH to MR HIGH
10
15
20
25
ns
tRTC
Retransmit Cycle Time
20
25
30
35
ns
tPRT
Retransmit Pulse Width
10
15
20
25
ns
tRTR
Retransmit Recovery Time
10
10
10
10
ns
tEFL
MR to EF LOW
20
25
30
35
ns
tHFH
MR to HF HIGH
20
25
30
35
ns
tFFH
MR to FF HIGH
20
25
30
35
ns
tREF
Read LOW to EF LOW
10
15
20
25
ns
tRFF
Read HIGH to FF HIGH
10
15
20
25
ns
tWEF
Write HIGH to EF HIGH
10
15
20
25
ns
tWFF
Write LOW to FF LOW
10
15
20
25
ns
tWHF
Write LOW to HF LOW
10
15
20
25
ns
tRHF
Read HIGH to HF HIGH
10
15
20
25
ns
tRAE
Effective Read from Write HIGH
10
15
20
25
ns
tRPE
Effective Read Pulse Width After EF HIGH
10
15
20
25
ns
tWAF
Effective Write from Read HIGH
10
15
20
25
ns
tWPF
Effective Write Pulse Width After FF HIGH
10
15
20
25
ns
tXOL
Expansion Out LOW Delay from Clock
10
15
20
25
ns
tXOH
Expansion Out HIGH Delay from Clock
10
15
20
25
ns
Notes
7. Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V and output loading of the specified IOL/IOH and 30 pF load capacitance,
as in part (a) of AC Test Load and Waveforms, unless otherwise specified.
8. See the last page of this specification for Group A subgroup testing information.
9. tHZR transition is measured at +200 mV from VOL and –200 mV from VOH. tDVR transition is measured at the 1.5V level. tHWZ and tLZR transition is measured at
±100 mV from the steady state.
10. tHZR and tDVR use capacitance loading as in part (b) of AC Test Load and Waveforms.
[+] Feedback


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