Cypress Semiconductor CY7C1020BN Şartname Sayfası - Sayfa 3

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AC Test Loads and Waveforms
R 481Ω
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
(a)

Switching Characteristics

Parameter
Read Cycle
t
Read Cycle Time
RC
t
Address to Data Valid
AA
t
Data Hold from Address Change
OHA
t
CE LOW to Data Valid
ACE
t
OE LOW to Data Valid
DOE
t
OE LOW to Low Z
LZOE
t
OE HIGH to High Z
HZOE
t
CE LOW to Low Z
LZCE
t
CE HIGH to High Z
HZCE
t
CE LOW to Power-Up
PU
t
CE HIGH to Power-Down
PD
t
Byte Enable to Data Valid
DBE
t
Byte Enable to Low Z
LZBE
t
Byte Disable to High Z
HZBE
[8]
Write Cycle
t
Write Cycle Time
WC
t
CE LOW to Write End
SCE
t
Address Set-Up to Write End
AW
t
Address Hold from Write End
HA
t
Address Set-Up to Write Start
SA
t
WE Pulse Width
PWE
t
Data Set-Up to Write End
SD
t
Data Hold from Write End
HD
t
WE HIGH to Low Z
LZWE
t
WE LOW to High Z
HZWE
t
Byte Enable to End of Write
BW
Notes:
5. Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
I
/I
and 30-pF load capacitance.
OL
OH
6. At any given temperature and voltage condition, t
are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady-state
7. t
, t
, t
, and t
HZOE
HZBE
HZCE
HZWE
voltage.
8. The internal write time of the memory is defined by the overlap of CE LOW, WE LOW and BHE / BLE LOW. CE, WE and BHE / BLE must be LOW to initiate
a write, and the transition of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal
that terminates the write.
Document #: 001-06443 Rev. **
R 481Ω
5V
OUTPUT
R2
5 pF
255Ω
INCLUDING
JIG AND
SCOPE
(b)
167
Equivalent to: THÉVENIN
[5]
Over the Operating Range
Description
[6]
[6, 7]
[6]
[6, 7]
[6]
[6, 7]
is less than t
HZCE
LZCE
3.0V
10%
R2
GND
255Ω
Rise Time: 1 V/ns
OUTPUT
EQUIVALENT
7C1020BN-12
Min.
Max.
12
12
3
12
6
0
6
3
6
0
12
6
0
6
12
9
8
0
0
8
6
0
3
6
8
, t
is less than t
, and t
is less than t
HZOE
LZOE
HZWE
CY7C1020BN
ALL INPUT PULSES
90%
90%
10%
Fall Time: 1 V/ns
1.73V
30 pF
7C1020BN-15
Min.
Max.
15
15
3
15
7
0
7
3
7
0
15
7
0
7
15
10
10
0
0
10
8
0
3
7
9
for any given device.
LZWE
Page 3 of 8
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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