參數(shù)資料
型號: CY62136EV30LL-45ZSXI
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: DRAM
英文描述: 2-Mbit (128K x 16) Static RAM
中文描述: 128K X 16 STANDARD SRAM, 45 ns, PDSO44
封裝: LEAD FREE, TSOP2-44
文件頁數(shù): 5/12頁
文件大小: 567K
代理商: CY62136EV30LL-45ZSXI
CY62136EV30
MoBL
Document #: 38-05569 Rev. *B
Page 5 of 12
Switching Characteristics
Over the Operating Range
[10, 11, 12, 13]
Parameter
Description
45 ns
Unit
Min.
Max.
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
Write Cycle
[13]
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
BW
t
SD
t
HD
t
HZWE
t
LZWE
Notes:
10.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
CC(typ)
/2, input
pulse levels of 0 to V
, and output loading of the specified I
/I
OH
as shown in the “AC Test Loads and Waveforms” section.
11. At any given temperature and voltage condition, t
HZCE
is less than t
LZCE
, t
HZBE
is less than t
LZBE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for any
given device.
12.t
, t
, t
, and t
transitions are measured when the outputs enter a high impedence state.
13.The internal Write time of the memory is defined by the overlap of WE, CE
= V
, BHE and/or BLE = V
. All signals must be ACTIVE to initiate a write and any
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.
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE LOW to Data Valid
OE LOW to Data Valid
OE LOW to LOW Z
[11]
OE HIGH to High Z
[11, 12]
CE LOW to Low Z
[11]
CE HIGH to High Z
[11, 12]
CE LOW to Power-Up
CE HIGH to Power-Down
BLE/BHE LOW to Data Valid
BLE/BHE LOW to Low Z
[11]
BLE/BHE HIGH to HIGH Z
[11, 12]
45
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
45
10
45
22
5
18
10
18
0
45
22
5
18
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
WE LOW to High-Z
[11, 12]
WE HIGH to Low-Z
[11]
45
35
35
0
0
35
35
25
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
18
10
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