cy62147ev30 Cypress Semiconductor Corporation., cy62147ev30 Datasheet - Page 5

• Manufacturer Part Number: cy62147ev30
• Description: 4-mbit 256k X 16 Static Ram
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-05440 Rev. *E
Switching Characteristics
Over the Operating Range
Notes
Read Cycle
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Write Cycle
t
t
t
t
t
t
t
t
t
t
t
12. 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
13. AC timing parameters are subject to byte enable signals (BHE or BLE) not switching when chip is disabled. See
14. At any temperature and voltage condition, t
15. t
16. The internal write time of the memory is defined by the overlap of WE, CE = V
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
DBE
LZBE
HZBE
WC
SCE
AW
HA
SA
PWE
BW
SD
HD
HZWE
LZWE
pulse levels of 0 to V
these signals can terminate a write by going inactive. The data input setup and hold timing must be referenced to the edge of the signal that terminates the write.
HZOE
Parameter
, t
HZCE
, t
[16]
HZBE
, and t
CC(typ)
HZWE
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
OE HIGH to High Z
CE LOW to Low Z
CE HIGH to High Z
CE LOW to Power Up
CE HIGH to Power Down
BLE/BHE LOW to Data Valid
BLE/BHE LOW to Low Z
BLE/BHE HIGH to HIGH Z
Write Cycle Time
CE LOW to Write End
Address Setup to Write End
Address Hold from Write End
Address Setup to Write Start
WE Pulse Width
BLE/BHE LOW to Write End
Data Setup to Write End
Data Hold from Write End
WE LOW to High-Z
WE HIGH to Low-Z
, and output loading of the specified I
transitions are measured when the outputs enter a high impedance state.
[12, 13]
Description
HZCE
[14]
is less than t
[14, 15]
[14]
[14, 15]
[14, 15]
[14]
[14]
[14, 15]
LZCE
OL
, t
/I
HZBE
OH
as shown in the
is less than t
45 ns (Ind’l/Auto-A)
IL
, BHE, BLE, or both = V
Min
45
10
10
10
45
35
35
35
35
25
10
5
0
0
0
0
LZBE
“AC Test Loads and Waveforms” on page
, t
HZOE
Max
45
45
22
is less than t
18
18
45
45
18
18
IL
. All signals must be active to initiate a write and any of
LZOE
CY62147EV30 MoBL
application note AN13842
Min
55
10
10
10
55
40
40
40
40
25
10
, and t
55 ns (Auto-E)
5
0
0
0
0
HZWE
is less than t
4.
Max
55
55
25
20
20
55
55
20
20
for further clarification.
LZWE
Page 5 of 12
CC(typ)
for any device.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
/2, input
®
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