Cypress CY7C1019BN Manual De Usuario
CY7C1019BN
Document #: 001-06425 Rev. **
Page 3 of 8
AC Test Loads and Waveforms
Switching Characteristics
[4]
Over the Operating Range
Parameter
Description
-12
-15
Unit
Min.
Max.
Min.
Max.
Read Cycle
t
RC
Read Cycle Time
12
15
ns
t
AA
Address to Data Valid
12
15
ns
t
OHA
Data Hold from Address Change
3
3
ns
t
ACE
CE LOW to Data Valid
12
15
ns
t
DOE
OE LOW to Data Valid
6
7
ns
t
LZOE
OE LOW to Low Z
0
0
ns
t
HZOE
OE HIGH to High Z
[5, 6]
6
7
ns
t
LZCE
CE LOW to Low Z
[6]
3
3
ns
t
HZCE
CE HIGH to High Z
[5, 6]
6
7
ns
t
PU
CE LOW to Power-Up
0
0
ns
t
PD
CE HIGH to Power-Down
12
15
ns
Write Cycle
[7, 8]
t
WC
Write Cycle Time
12
15
ns
t
SCE
CE LOW to Write End
9
10
ns
t
AW
Address Set-Up to Write End
8
10
ns
t
HA
Address Hold from Write End
0
0
ns
t
SA
Address Set-Up to Write Start
0
0
ns
t
PWE
WE Pulse Width
8
10
ns
t
SD
Data Set-Up to Write End
6
8
ns
t
HD
Data Hold from Write End
0
0
ns
t
LZWE
WE HIGH to Low Z
[6]
3
3
ns
t
HZWE
WE LOW to High Z
[5, 6]
6
7
ns
Notes:
4. 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
OL
/I
OH
and 30-pF load capacitance.
5. t
HZOE
, t
HZCE
, and t
HZWE
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 voltage.
6. At any given temperature and voltage condition, t
HZCE
is less than t
LZCE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for any given device.
7. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. CE and WE must be LOW to initiate a write, and the transition of any
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.
8. The minimum write cycle time for Write Cycle no. 3 (WE controlled, OE LOW) is the sum of t
HZWE
and t
SD
.
90%
10%
3.0V
GND
90%
10%
ALL INPUT PULSES
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
JIG AND
SCOPE
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
JIG AND
SCOPE
(a)
(b)
≤ 3 ns
≤ 3 ns
OUTPUT
R1 480
Ω
R1 480
Ω
R2
255
Ω
R2
255
Ω
167
Ω
Equivalent to: THÉVENIN EQUIVALENT
1.73V