cy62137vll-70zxi Cypress Semiconductor Corporation., cy62137vll-70zxi Datasheet - Page 5

• Manufacturer Part Number: cy62137vll-70zxi
• Description: 2-mbit 128k X 16 Static Ram
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-05051 Rev. *E
Switching Characteristics
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
Notes:
10. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can
11. The minimum write cycle time for write cycle #3 (WE controlled, OE LOW) is the sum of t
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
DBE
LZBE
HZBE
WC
SCE
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
BW
6. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V, input levels of 0 to V
7. At any given temperature and voltage condition, t
8. t
9. If both byte enables are toggled together this value is 10 ns.
I
terminate a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write.
OL
HZOE
[9]
/I
OH
Parameter
, t
and 30 pF load capacitance.
HZCE
[10, 11]
, and t
HZWE
are specified with C
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
BHE/BLE LOW to Data Valid
BHE/BLE LOW to Low-Z
BHE/BLE 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
Data Set-up to Write End
Data Hold from Write End
WE LOW to High-Z
WE HIGH to Low-Z
BHE/BLE LOW to End of Write
Over the Operating Range
L
= 5 pF as in (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
Description
HZCE
[7]
[7]
[7, 8]
[7, 8]
[7, 8]
[7]
is less than t
LZCE
, t
HZOE
[6]
is less than t
Min.
55
10
55
45
40
10
45
25
50
5
0
5
0
5
0
0
HZWE
LZOE
55 ns
and t
, and t
SD
Max.
.
55
55
25
25
25
55
55
25
20
HZWE
is less than t
CC
typ., and output loading of the specified
Min.
70
10
10
70
60
60
50
30
10
60
CY62137V MoBL
5
0
5
0
0
0
LZWE
70 ns
for any given device.
Max.
70
70
35
25
25
70
70
25
25
Page 5 of 11
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
®
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