PRELIMINARY
CY14B104L, CY14B104N
Document #: 001-07102 Rev. *F
Page 9 of 22
AC Test Conditions
Input Pulse Levels ....................................................0V to 3V
Input Rise and Fall Times (10% - 90%) ........................ <5 ns
Input and Output Timing Reference Levels .................... 1.5V
Notes
10. WE must be HIGH during SRAM read cycles.
11. Device is continuously selected with CE and OE both LOW.
12. Measured ±200 mV from steady state output voltage.
13. If CE is LOW and then WE goes LOW, the output goes into high impedance state afetr tHZWE time period.
AC Switching Characteristics
In the following table, the AC switching characteristics are listed.
Parameters
Description
15 ns
25 ns
45 ns
Unit
Cypress
Parameters
Alt
Parameters
Min
Max
Min
Max
Min
Max
SRAM Read Cycle
tACE
tACS
Chip Enable Access Time
15
25
45
ns
tRC
[10]
tRC
Read Cycle Time
15
25
45
ns
tAA
[11]
tAA
Address Access Time
15
25
45
ns
tDOE
tOE
Output Enable to Data Valid
10
12
20
ns
tOHA
tOH
Output Hold After Address Change
3
3
3
ns
tLZCE
[12]
tLZ
Chip Enable to Output Active
3
3
3
ns
tHZCE
[12]
tHZ
Chip Disable to Output Inactive
7
10
15
ns
tLZOE
[12]
tOLZ
Output Enable to Output Active
0
0
0
ns
tHZOE
[12]
tOHZ
Output Disable to Output Inactive
7
10
15
ns
tPU
[9]
tPA
Chip Enable to Power Active
0
0
0
ns
tPD
[9]
tPS
Chip Disable to Power Standby
15
25
45
ns
tDBE
-
Byte Enable to Data Valid
10
12
22
ns
tLZBE
-
Byte Enable to Output Active
0
0
0
ns
tHZBE
-
Byte Disable to Output Inactive
7
10
22
ns
SRAM Write Cycle
tWC
tWC
Write Cycle Time
15
25
45
ns
tPWE
tWP
Write Pulse Width
10
20
30
ns
tSCE
tCW
Chip Enable To End of Write
15
20
30
ns
tSD
tDW
Data Setup to End of Write
5
10
15
ns
tHD
tDH
Data Hold After End of Write
0
0
0
ns
tAW
tAW
Address Setup to End of Write
15
20
30
ns
tSA
tAS
Address Setup to Start of Write
0
0
0
ns
tHA
tWR
Address Hold After End of Write
0
0
0
ns
tHZWE
[12,13]
tWZ
Write Enable to Output Disable
7
10
15
ns
tLZWE
[12]
tOW
Output Active after End of Write
3
3
3
ns
tBW
-
Byte Enable to End of Write
15
20
30
ns
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