MC74LVX259
http://onsemi.com
6
TIMING REQUIREMENTS Input tr = tf = 3.0 ns
Symbol
Parameter
Test Conditions
TA = 25°C
TA = ≤ 85°C
Unit
Min
Typ
Max
Min
Max
tw
Minimum Pulse Width, Reset or Enable
VCC = 2.7 V
4.5
5.0
ns
VCC = 3.3 V ± 0.3 V
4.5
5.0
tsu
Minimum Setup Time, Address or Data to Enable
VCC = 2.7 V
4.0
4.0
ns
VCC = 3.3 V ± 0.3 V
3.0
3.0
th
Minimum Hold Time, Enable to Address or Data
VCC = 2.7 V
2.0
2.0
ns
VCC = 3.3 V ± 0.3 V
2.0
2.0
tr, tf
Maximum Input, Rise and Fall Times
VCC = 2.7 V
400
300
ns
VCC = 3.3 V ± 0.3 V
300
300
*Includes all probe and jig capacitance
Figure 5. Switching Waveform
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Q
DATA
IN
50%
tPLH
tPHL
tf
GND
VCC
50%
Figure 6. Switching Waveform
tr
50%
tPHL
50%
tPHL
DATA
IN
ADDRESS
SELECT
OUTPUT
Q
VCC
GND
VCC
GND
VCC
GND
Figure 7. Switching Waveform
Figure 8. Switching Waveform
Figure 9. Switching Waveform
50%
tw
50%
tPHL
DATA IN
OUTPUT Q
RESET
VCC
GND
VCC
GND
VCC
GND
VCC
GN
D
DATA IN
OUTPUT Q
ENABLE
DATA IN OR
ADDRESS
SELECT
ENABLE
VCC
GND
VCC
GND
tw
50%
tPHL
50%
tsu
th(H)
tsu
Figure 10. Test Circuit