MC74HCT244A_06 Datasheet, PDF (3/8 Pages) ON Semiconductor – Octal 3−State Noninverting Buffer/Line Driver/Line Receiver with LSTTL−Compatible Inputs

MC74HCT244A
AC ELECTRICAL CHARACTERISTICS (V_CC = 5.0 V ± 10%, C_L = 50 pF, Input t_r = t_f = 6 ns)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Guaranteed Limit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol
Parameter
– 55 to 25_C v 85_C v 125_C Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLH,
t_PHL
Maximum Propagation Delay, A to YA or B to YB
(Figures 1 and 3)
20
25
30
ns
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tPLZ,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ t_PHZ
Maximum Propagation Delay, Output Enable to YA or YB
(Figures 2 and 4)
26
33
39
ns
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPZL,
t_PZH
Maximum Propagation Delay, Output Enable to YA or YB
(Figures 2 and 4)
22
28
33
ns
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tTLH,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _tTHL
Maximum Output Transition Time, Any Output
(Figures 1 and 3)
12
15
18
ns
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Cin Maximum Input Capacitance}
10
10
10
pF
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Cout Maximum Three−State Output Capacitance}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{(Output in High−Impedance State)}
15
15
15
pF
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{NOTE:For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON}
Semiconductor High−Speed CMOS Data Book (DL129/D).
Typical @ 25°C, V_CC = 5.0 V
C_PD Power Dissipation Capacitance (Per Enabled Output)*
55
pF
* Used to determine the no−load dynamic power consumption: P_D = C_PD V_CC2f + I_CC V_CC. For load considerations, see Chapter 2 of the
ON Semiconductor High−Speed CMOS Data Book (DL129/D).
SWITCHING WAVEFORMS
t_r
INPUT
A OR B
t_PLH
OUTPUT
YA OR YB
2.7 V
1.3 V
0.3 V
90%
1.3 V
10%
t_TLH
Figure 2.
t_f
3V
GND
t_PHL
t_THL
ENABLE
A OR B
OUTPUT Y
OUTPUT Y
1.3 V
t_PZL
t_PLZ
1.3 V
t_PZH t_PHZ
1.3 V
Figure 3.
3V
GND
HIGH
IMPEDANCE
10% V_OL
90% VOH
HIGH
IMPEDANCE
http://onsemi.com
3