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CY62256VLL-70SNXC Datasheet(PDF) 5 Page - Cypress Semiconductor

Part # CY62256VLL-70SNXC
Description  256K (32K x 8) Static RAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY62256VLL-70SNXC Datasheet(HTML) 5 Page - Cypress Semiconductor

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CY62256V
Document #: 38-05057 Rev. *F
Page 5 of 12
Switching Characteristics Over the Operating Range[7]
Parameter
Description
CY62256V-70
Unit
Min.
Max.
Read Cycle
tRC
Read Cycle Time
70
ns
tAA
Address to Data Valid
70
ns
tOHA
Data Hold from Address Change
10
ns
tACE
CE LOW to Data Valid
70
ns
tDOE
OE LOW to Data Valid
35
ns
tLZOE
OE LOW to Low-Z[8]
5ns
tHZOE
OE HIGH to High-Z[8, 9]
25
ns
tLZCE
CE LOW to Low-Z[8]
10
ns
tHZCE
CE HIGH to High-Z[8, 9]
25
ns
tPU
CE LOW to Power-up
0
ns
tPD
CE HIGH to Power-down
70
ns
Write Cycle[10, 11]
tWC
Write Cycle Time
70
ns
tSCE
CE LOW to Write End
60
ns
tAW
Address Set-up to Write End
60
ns
tHA
Address Hold from Write End
0
ns
tSA
Address Set-up to Write Start
0
ns
tPWE
WE Pulse Width
50
ns
tSD
Data Set-up to Write End
30
ns
tHD
Data Hold from Write End
0
ns
tHZWE
WE LOW to High-Z[8, 9]
25
ns
tLZWE
WE HIGH to Low-Z[8]
10
ns
Notes:
7. Test conditions assume signal transition time of 5 ns or less timing reference levels of VCC/2, input pulse levels of 0 to VCC, and output loading of the specified
IOL/IOH and 50 pF load capacitance.
8. At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
9. tHZOE, tHZCE, and tHZWE are specified with CL = 5 pF as in (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage.
10. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can
terminate a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write.
11. The minimum write cycle time for write cycle #3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.
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