cym1841c ETC-unknow, cym1841c Datasheet - Page 4

• Manufacturer Part Number: cym1841c
• Description: 256k X 32 Static Ram Module
• Manufacturer: ETC-unknow

Switching Characteristics
READ CYCLE
t
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
t
t
t
Shaded area contains preliminary information.
Notes:
Parameter
RC
AA
OHA
ACS
DOE
LZOE
HZOE
LZCS
HZCS
PD
WC
SCS
AW
HA
SA
PWE
SD
HD
LZWE
HZWE
4.
5.
6.
7.
Test conditions assume signal transition times of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
I
At any given temperature and voltage condition, t
t
The internal write time of the memory is defined by the overlap of CS LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can
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
HZCS
/I
OH
and t
and 30-pF load capacitance.
HZWE
Read Cycle Time
Address to Data Valid
Output Hold from Address Change
CS LOW to Data Valid
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
CS LOW to Low Z
CS HIGH to High Z
CS HIGH to Power-Down
Write Cycle Time
CS 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 HIGH to Low Z
WE LOW to High Z
[7]
are specified with C
Description
[5]
[6]
[5, 6]
L
Over the Operating Range
= 5 pF as in part (b) of AC Test Loads and Waveforms. Transition is measured 500 mV from steady-state voltage.
HZCS
is less than t
Min.
12
12
10
1841C-12
3
0
3
9
9
0
2
7
1
0
0
LZCS
for any given device. These parameters are guaranteed by design and not 100% tested.
[4]
Max.
12
12
12
4
7
7
7
5
Min.
15
15
10
10
13
1841C-15
3
0
3
0
2
8
1
0
0
Max.
15
15
15
8
8
8
7
Min.
20
10
20
15
18
15
13
1841A-20
1841C-20
3
0
0
2
2
0
0
Max.
20
20
13
15
20
20
15
Min.
25
10
25
20
20
20
15
1841A-25
1841C-25
3
0
0
2
2
0
0
CYM1841A
CYM1841C
Max.
25
25
15
15
20
25
15
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns