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| MC74VHC244 Datasheet, PDF (4/8 Pages) Motorola, Inc – Octal Bus Buffer | |||
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MC74VHC244
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3.0 ns)
Symbol
Parameter
tPLH,
tPHL
Maximum Propagation
Delay, A to YA or
B to YB
tPZL,
tPZH
Output Enable Time
OEA to YA or
OEB to YB
tPLZ,
tPHZ
Output Disable Time
OEA to YA or
OEB to YB
tOSLH, Output to Output Skew
tOSHL
Test Conditions
TA = 25°C
Min Typ Max
VCC = 3.3 ± 0.3 V
VCC = 5.0 ± 0.5 V
VCC = 3.3 ± 0.3 V
RL = 1 kΩ
VCC = 5.0 ± 0.5 V
RL = 1 kΩ
VCC = 3.3 ± 0.3 V
RL = 1 kΩ
VCC = 5.0 ± 0.5 V
RL = 1 kΩ
VCC = 3.3 ± 0.3 V
(Note 6)
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
5.8 8.4
8.3 11.9
3.9 5.5
5.4 7.5
6.6 10.6
9.1 14.1
4.7 7.3
6.2 9.3
10.3 14.0
6.7 9.2
1.5
VCC = 5.0 ± 0.5 V CL = 50 pF
1.0
(Note 6)
Cin Maximum Input
Capacitance
4
10
Cout Maximum Three--State
6
Output Capacitance
(Output in High--Impedance
State)
TA ⤠85°C
Min Max
1.0 10.0
1.0 13.5
1.0 6.5
1.0 8.5
1.0 12.5
1.0 16.0
1.0 8.5
1.0 10.5
1.0 16.0
1.0 10.5
1.5
1.0
10
--55°C ⤠TA
⤠125°C
Min Max Unit
1.0 11.0 ns
1.0 14.5
1.0 7.5
1.0 9.5
1.0 13.5 ns
1.0 17.0
1.0 9.5
1.0 11.5
1.0 17.0 ns
1.0 11.5
1.5 ns
1.5
10 pF
pF
Typical @ 25°C, VCC = 5.0V
CPD Power Dissipation Capacitance (Note 7)
19
pF
6. Parameter guaranteed by design. tOSLH = |tPLHm -- tPLHn|, tOSHL = |tPHLm -- tPHLn|.
7. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: ICC(OPR) = CPD ¯ VCC ¯ fin + ICC/8 (per bit). CPD is used to determine the no--load
dynamic power consumption; PD = CPD ¯ VCC2 ¯ fin + ICC ¯ VCC.
NOISE CHARACTERISTICS (Input tr = tf = 3.0 ns, CL = 50 pF, VCC = 5.0 V)
Symbol
VOLP
VOLV
VIHD
VILD
Parameter
Quiet Output Maximum Dynamic VOL
Quiet Output Minimum Dynamic VOL
Minimum High Level Dynamic Input Voltage
Maximum Low Level Dynamic Input Voltage
TA = 25°C
Typ
Max
Unit
0.6
0.9
V
--0.6
--0.9
V
3.5
V
1.5
V
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