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M74HC244TTR

P1-P3P4-P6P7-P9P10-P10
M74HC244
4/10
AC ELECTRICAL CHARACTERISTICS (C
L
= 50 pF, Input t
r
= t
f
= 6ns)
CAPACITIVE CHARACTERISTICS
1) C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/8 (per circuit)
Symbol Parameter
Test Conditions Value
Unit
V
CC
(V)
C
L
(pF)
T
A
= 25°C
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
t
TLH
t
THL
Output Transition
Time
2.0
50
25 60 75 90
ns4.5 7121918
6.0 6101315
t
PLH
t
PHL
Propagation Delay
Time
2.0
50
36 90 115 135
ns4.5 12 18 23 27
6.0 10 15 20 23
2.0
150
51 130 165 195
ns4.5 17 26 33 39
6.0 14 22 28 33
t
PZL
t
PZH
High Impedance
Output Enable
Time
2.0
50
R
L
= 1 KΩ
48 125 155 190
ns4.5 16 25 31 38
6.0 14 21 25 32
2.0
150
R
L
= 1 KΩ
63 165 205 250
ns4.5 21 33 41 50
6.0 18 28 35 43
t
PLZ
t
PHZ
High Impedance
Output Disable
Time
2.0
50
R
L
= 1 KΩ
32 125 155 190
ns4.5 15 25 31 38
6.0 14 21 26 32
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
= 25°C
-40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
C
IN
Input Capacitance
5.0 5101010pF
C
OUT
Output
Capacitance
5.0 10 pF
C
PD
Power Dissipation
Capacitance (note
1)
5.0 33 pF
Obsolete Product(s) - Obsolete Product(s)
M74HC244
5/10
TEST CIRCUIT
C
L
= 50pF/150pF or equivalent (includes jig and probe capacitance)
R
1
= 1KΩ or equivalent
R
T
= Z
OUT
of pulse generator (typically 50Ω)
WAVEFORM 1: PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)
TEST SWITCH
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
V
CC
t
PZH
, t
PHZ
GND
Obsolete Product(s) - Obsolete Product(s)
M74HC244
6/10
WAVEFORM 2 : OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle)
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P10

M74HC244TTR

Mfr. #:
Buy M74HC244TTR
Manufacturer:
STMicroelectronics
Description:
Buffers & Line Drivers Octal Bus Buffer
Lifecycle:
New from this manufacturer.
Delivery:
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