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CY7C1049BV33-17ZI Datasheet(PDF) 4 Page - Cypress Semiconductor

Part # CY7C1049BV33-17ZI
Description  512K x 8 Static RAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1049BV33-17ZI Datasheet(HTML) 4 Page - Cypress Semiconductor

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CY7C1049BV33
Document #: 38-05139 Rev. *A
Page 4 of 10
AC Switching Characteristics[4] Over the Operating Range
-12
-15
-17
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
Read Cycle
tpower
VCC(typical) to the First Access
[5]
11
1
µs
tRC
Read Cycle Time
12
15
17
ns
tAA
Address to Data Valid
12
15
17
ns
tOHA
Data Hold from Address Change
3
3
3
ns
tACE
CE LOW to Data Valid
12
15
17
ns
tDOE
OE LOW to Data Valid
6
7
8
ns
tLZOE
OE LOW to Low Z
0
0
0
ns
tHZOE
OE HIGH to High Z[6, 7]
678
ns
tLZCE
CE LOW to Low Z[7]
33
3
ns
tHZCE
CE HIGH to High Z[6, 7]
678
ns
tPU
CE LOW to Power-Up
0
0
0
ns
tPD
CE HIGH to Power-Down
12
15
17
ns
Write Cycle[8, 9]
tWC
Write Cycle Time
12
15
17
ns
tSCE
CE LOW to Write End
101213
ns
tAW
Address Set-Up to Write End
10
12
13
ns
tHA
Address Hold from Write End
0
0
0
ns
tSA
Address Set-Up to Write Start
0
0
0
ns
tPWE
WE Pulse Width
10
12
13
ns
tSD
Data Set-Up to Write End
7
8
9
ns
tHD
Data Hold from Write End
0
0
0
ns
tLZWE
WE HIGH to Low Z[7]
33
3
ns
tHZWE
WE LOW to High Z[6, 7]
678
ns
Notes:
4.
Test conditions assume signal transition time of 3 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 30-pF load capacitance.
5.
This part has a voltage regulator which steps down the voltage from 5V to 3.3V internally. T.power time has to be provided initially before a read/write operation
is started.
6.
tHZOE, tHZCE, and tHZWE are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured ± 500 mV from steady-state voltage.
7.
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.
8.
The internal write time of the memory is defined by the overlap of CE LOW, and WE LOW. CE and WE must be LOW to initiate a write, and the transition of either of
these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates the write.
9.
The minimum write cycle time for Write Cycle No. 3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.


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