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M74HC251B1R

P1-P3P4-P6P7-P9P10-P11
M74HC251
4/11
RECOMMENDED OPERATING CONDITIONS
DC SPECIFICATIONS
Symbol Parameter Value Unit
V
CC
Supply Voltage
2 to 6 V
V
I
Input Voltage 0 to V
CC
V
V
O
Output Voltage 0 to V
CC
V
T
op
Operating Temperature
-55 to 125 °C
t
r
, t
f
Input Rise and Fall Time V
CC
= 2.0V
0 to 1000 ns
V
CC
= 4.5V
0 to 500 ns
V
CC
= 6.0V
0 to 400 ns
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.
V
IH
High Level Input
Voltage
2.0 1.5 1.5 1.5
V4.5 3.15 3.15 3.15
6.0 4.2 4.2 4.2
V
IL
Low Level Input
Voltage
2.0 0.5 0.5 0.5
V4.5 1.35 1.35 1.35
6.0 1.8 1.8 1.8
V
OH
High Level Output
Voltage
2.0
I
O
=-20 µA
1.9 2.0 1.9 1.9
V
4.5
I
O
=-20 µA
4.4 4.5 4.4 4.4
6.0
I
O
=-20 µA
5.9 6.0 5.9 5.9
4.5
I
O
=-4.0 mA
4.18 4.31 4.13 4.10
6.0
I
O
=-5.2 mA
5.68 5.8 5.63 5.60
V
OL
Low Level Output
Voltage
2.0
I
O
=20 µA
0.0 0.1 0.1 0.1
V
4.5
I
O
=20 µA
0.0 0.1 0.1 0.1
6.0
I
O
=20 µA
0.0 0.1 0.1 0.1
4.5
I
O
=4.0 mA
0.17 0.26 0.33 0.40
6.0
I
O
=5.2 mA
0.18 0.26 0.33 0.40
I
I
Input Leakage
Current
6.0
V
I
= V
CC
or GND
± 0.1 ± 1 ± 1 µA
I
OZ
High Impedance
Output Leakage
Current
6.0
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
± 0.5 ± 5 ± 10 µA
I
CC
Quiescent Supply
Current
6.0
V
I
= V
CC
or GND
44080µA
M74HC251
5/11
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
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.
t
TLH
t
THL
Output Transition
Time
2.0 30 75 95 115
ns4.5 8151923
6.0 7131620
t
PLH
t
PHL
Propagation Delay
Time
(D - Y, W)
2.0 64 130 165 195
ns4.5 16 26 33 39
6.0 14 22 28 33
t
PHL
Propagation Delay
Time
(A, B, C -Y, W)
2.0 80 160 200 240
ns4.5 20 32 40 48
6.0 17 27 34 41
t
PZL
t
PZH
High Impedance
Output Enable
Time
2.0
R
L
= 1 KΩ
36 90 115 135
ns4.5 11 18 23 27
6.0 9152023
t
PLZ
t
PHZ
High Impedance
Output Disable
Time
2.0
R
L
= 1 KΩ
26 85 105 130
ns4.5 13 17 21 26
6.0 11 14 18 22
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
PD
Power Dissipation
Capacitance (note
1)
5.0 62 pF
M74HC251
6/11
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 TIME (f=1MHz; 50% duty cycle)
TEST SWITCH
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
V
CC
t
PZH
, t
PHZ
GND
P1-P3P4-P6P7-P9P10-P11

M74HC251B1R

Mfr. #:
Buy M74HC251B1R
Manufacturer:
STMicroelectronics
Description:
Encoders, Decoders, Multiplexers & Demultiplexers 8-Ch Multiplexer
Lifecycle:
New from this manufacturer.
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