MC74LCX74_12 Datasheet, PDF (6/8 Pages) ON Semiconductor – Low-Voltage CMOS Dual D-Type Flip-Flop

MC74LCX74
SDn, CDn
t_w
Vcc
Vmi
CPn
0V
t_rec
Vcc
Vmi
0V
WAVEFORM 3 − RECOVERY TIME
t_R = t_F = 2.5 ns from 10% to 90%; f = 1 MHz; t_w = 500 ns
CPn
SDn, CDn, CPn
Vmi
t_w
t_w
Vmi
Vcc
Vmi
0V
Vcc
Vmi
0V
WAVEFORM 4 − PULSE WIDTH
t_R = t_F = 2.5 ns (or fast as required) from 10% to 90%;
Output requirements: V_OL ≤ 0.8 V, V_OH ≥ 2.0 V
Symbol
Vmi
Vmo
3.3 V + 0.3 V
1.5 V
1.5 V
Vcc
2.7 V
1.5 V
1.5 V
2.5 V + 0.2 V
Vcc/2
Vcc/2
Figure 3. AC Waveforms (Continued)
PULSE
GENERATOR
V_CC
DUT
R_T
C_L
R_L
C_L = 50 pF at V_CC = 3.3 ± 0.3 V or equivalent (includes jig and probe capacitance)
C_L = 30 pF at V_CC = 2.5 ± 0.2 V or equivalent (includes jig and probe capacitance)
R_L = R₁ = 500 W or equivalent
R_T = Z_OUT of pulse generator (typically 50 W)
Figure 4. Test Circuit
http://onsemi.com
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