Cypress CY7C1020BN AC Test Loads and Waveforms, Switching Characteristics[5] Over the Operating Range

CY7C1020BN
Document #: 001-06443 Rev. ** Page 3 of 8
AC Test Loads and Waveforms
Switching Characteristics[5] Over the Operating Range
Parameter Description
7C1020BN-12 7C1020BN-15
UnitMin. Max. Min. Max.
Read Cycle
tRC Read Cycle Time 12 15 ns
tAA Address to Data Valid 12 15 ns
tOHA Data Hold from Address Change 3 3 ns
tACE CE LOW to Data Valid 12 15 ns
tDOE OE LOW to Data Valid 6 7 ns
tLZOE OE LOW to Low Z[6] 0 0 ns
tHZOE OE HIGH to High Z[6, 7] 6 7 ns
tLZCE CE LOW to Low Z[6] 3 3 ns
tHZCE CE HIGH to High Z[6, 7] 6 7 ns
tPU CE LOW to Power-Up 0 0 ns
tPD CE HIGH to Power-Down 12 15 ns
tDBE Byte Enable to Data Valid 6 7 ns
tLZBE Byte Enable to Low Z 0 0 ns
tHZBE Byte Disable to High Z 6 7 ns
Write Cycle[8]
tWC Write Cycle Time 12 15 ns
tSCE CE LOW to Write End 910 ns
tAW Address Set-Up to Write End 810 ns
tHA Address Hold from Write End 0 0 ns
tSA Address Set-Up to Write Start 0 0 ns
tPWE WE Pulse Width 810 ns
tSD Data Set-Up to Write End 6 8 ns
tHD Data Hold from Write End 0 0 ns
tLZWE WE HIGH to Low Z[6] 3 3 ns
tHZWE WE LOW to High Z[6, 7] 6 7 ns
tBW Byte Enable to End of Write 8 9 ns
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
IOL/IOH and 30-pF load capacitance.
6. At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
7. tHZOE, tHZBE, tHZCE, and tHZWE 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.
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.
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)
OUTPUT
R 481ΩR 481Ω
R2
255Ω
R2
255Ω
167 Equivalent to: THÉVENIN
EQUIVALENT
1.73V
30 pF
Rise Time: 1 V/ns Fall Time: 1 V/ns
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