Cypress CY62138EV30 Lembar Spesifikasi - Halaman 5

Jelajahi secara online atau unduh pdf Lembar Spesifikasi untuk Perangkat Keras Komputer Cypress CY62138EV30. Cypress CY62138EV30 9 halaman. 2-mbit (256k x 8) mobl static ram

Halaman Cetak
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
[12]
Write Cycle
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
SD
t
HD
t
HZWE
t
LZWE
Switching Waveforms
Read Cycle No. 1 (Address Transition Controlled)
ADDRESS
DATA OUT
PREVIOUS DATA VALID
Notes:
9. Test Conditions for all parameters other than three-state parameters assume signal transition time of 3 ns or less (1 V/ns), timing reference levels of V
input pulse levels of 0 to V
, and output loading of the specified I
CC(typ)
10. At any given temperature and voltage condition, t
11. t
, t
, and t
transitions are measured when the output enter a high-impedance state.
HZOE
HZCE
HZWE
12. The internal write time of the memory is defined by the overlap of WE, CE = V
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.
13. Device is continuously selected. OE, CE = V
14. WE is HIGH for read cycle.
Document #: 38-05577 Rev. *A
(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
[10]
OE LOW to Low Z
[10,11]
OE HIGH to High Z
[10]
CE LOW to Low Z
[10, 11]
CE HIGH to High Z
CE LOW to Power-up
CE HIGH to Power-up
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
Data Set-up to Write End
Data Hold from Write End
[10, 11]
WE LOW to High Z
[10]
WE HIGH to Low Z
[13, 14]
t
AA
t
OHA
/I
OL
is less than t
, t
HZCE
LZCE
.
IL
[9]
Min.
45
10
10
45
35
35
35
25
10
t
RC
as shown in the "AC Test Loads and Waveforms" section.
OH
is less than t
, and t
is less than t
HZOE
LZOE
HZWE
. All signals must be ACTIVE to initiate a write and any of these signals can
IL
CY62138EV30
MoBL
45 ns
Max.
Unit
45
45
22
5
18
18
0
45
0
0
0
18
DATA VALID
for any given device.
LZWE
Page 5 of 9
®
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
/2,
CC(typ)
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