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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
UnitMin. 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]
67ns
t
LZCE
CE
LOW to Low Z
[6]
33 ns
t
HZCE
CE
HIGH to High Z
[5, 6]
67ns
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]
33 ns
t
HZWE
WE
LOW to High Z
[5, 6]
67ns
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
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(a)
(b)
≤ 3 ns ≤ 3 ns
OUTPUT
R1 480Ω
R1 480Ω
R2
255Ω
R2
255Ω
167Ω
Equivalent to: THÉVENIN EQUIVALENT
1.73V
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