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CY62256LL-55ZE Datasheet(PDF) 5 Page - Cypress Semiconductor

Part No. CY62256LL-55ZE
Description  256K (32K x 8) Static RAM
Download  14 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY62256LL-55ZE Datasheet(HTML) 5 Page - Cypress Semiconductor

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CY62256
Document #: 38-05248 Rev. *F
Page 5 of 14
Switching Characteristics Over the Operating Range[7]
Parameter
Description
CY62256
−55
CY62256
−70
Unit
Min.
Max.
Min.
Max.
Read Cycle
tRC
Read Cycle Time
55
70
ns
tAA
Address to Data Valid
55
70
ns
tOHA
Data Hold from Address Change
5
5
ns
tACE
CE LOW to Data Valid
55
70
ns
tDOE
OE LOW to Data Valid
25
35
ns
tLZOE
OE LOW to Low-Z[8]
55
ns
tHZOE
OE HIGH to High-Z[8, 9]
20
25
ns
tLZCE
CE LOW to Low-Z[8]
55
ns
tHZCE
CE HIGH to High-Z[8, 9]
20
25
ns
tPU
CE LOW to Power-up
0
0
ns
tPD
CE HIGH to Power-down
55
70
ns
Write Cycle[10, 11]
tWC
Write Cycle Time
55
70
ns
tSCE
CE LOW to Write End
45
60
ns
tAW
Address Set-up to Write End
45
60
ns
tHA
Address Hold from Write End
0
0
ns
tSA
Address Set-up to Write Start
0
0
ns
tPWE
WE Pulse Width
40
50
ns
tSD
Data Set-up to Write End
25
30
ns
tHD
Data Hold from Write End
0
0
ns
tHZWE
WE LOW to High-Z[8, 9]
20
25
ns
tLZWE
WE HIGH to Low-Z[8]
55
ns
Notes:
7. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
IOL/IOH and 100 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 ±500 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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