Cypress CY62137EV30 Lembar Spesifikasi - Halaman 5

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Switching Characteristics

Parameter
Read Cycle
t
RC
t
AA
t
OHA
t
ACE
t
DOE
t
LZOE
t
HZOE
t
LZCE
t
HZCE
t
PU
t
PD
t
DBE
t
LZBE
t
HZBE
[14]
Write Cycle
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
BW
t
SD
t
HD
t
HZWE
t
LZWE
Notes:
10. BHE.BLE is the AND of both BHE and BLE. The chip can be deselected by either disabling the chip enable signals or by disabling both BHE and BLE.
11. Test conditions for all parameters other than tri-state parameters assume signal transition time of 3 ns (1V/ns) or less, timing reference levels of V
pulse levels of 0 to V
, and output loading of the specified I
CC(typ.)
12. At any given temperature and voltage condition, t
given device.
13. t
, t
, t
, and t
transitions are measured when the outputs enter a high- impedance state.
HZOE
HZCE
HZBE
HZWE
14. The internal Write time of the memory is defined by the overlap of WE, CE = V
of these signals can terminate a write by going INACTIVE. The data input set-up and hold timing should be referenced to the edge of the signal that terminates
the write.
Document #: 38-05443 Rev. *B
Over the Operating Range
Description
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE LOW to Data Valid
OE LOW to Data Valid
[12]
OE LOW to LOW Z
[12, 13]
OE HIGH to High Z
[12]
CE LOW to Low Z
[12, 13]
CE HIGH to High Z
CE LOW to Power-Up
CE HIGH to Power-Down
BLE/BHE LOW to Data Valid
[12]
BLE/BHE LOW to Low Z
[12, 13]
BLE/BHE HIGH to HIGH Z
Write Cycle Time
CE LOW to Write End
Address Set-Up to Write End
Address Hold from Write End
Address Set-Up to Write Start
WE Pulse Width
BLE/BHE LOW to Write End
Data Set-Up to Write End
Data Hold from Write End
[12, 13]
WE LOW to High-Z
[12]
WE HIGH to Low-Z
/I
OL
OH
is less than t
HZCE
LZCE
[11]
Min.
45
10
5
10
0
5
45
35
35
0
0
35
35
25
0
10
as shown in the "AC Test Loads and Waveforms" section.
, t
is less than t
, t
is less than t
HZBE
LZBE
HZOE
, BHE and/or BLE = V
. All signals must be ACTIVE to initiate a write and any
IL
IL
CY62137EV30
MoBL
45 ns
Max.
Unit
ns
45
ns
ns
45
ns
22
ns
ns
18
ns
ns
18
ns
ns
45
ns
45
ns
ns
18
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
18
ns
ns
/2, input
CC(typ)
, and t
is less than t
LZOE
HZWE
LZWE
Page 5 of 12
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