M74HC4851M1R Просмотр технического описания (PDF) - STMicroelectronics
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M74HC4851M1R Datasheet PDF : 15 Pages
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M74HC4851
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition
Value
Symbol
Parameter
VCC
(V)
TEST CIRCUIT 1
TA = 25°C
up to 85°C up to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
tPHL,tPLH Propagation Delay 2.0
Time, Analog Input 3.0
to Analog Output 3.3
19.5 25
29
12 15.5
17.5
11 14.5
16.5
32
19.5
18.5 ns
4.5
8.6 11.5
12.5
13.5
6.0
8 10
11
12
tPHL,tPLH Propagation Delay 2.0
Time
3.0
Channel-Select to
Analog Output
3.3
4.5
23 30
35
13.5 17.5
20
12.5 16.5
19
10 13
15
40
23
22 ns
17
6.0
9.5 12.5
14.5
16.5
tPHZtPZH Enable Disable
2.0
tPLZ,tPZL
Time, Enable or
Channel-Select to
Analog Output
3.0
3.3
4.5
95
105
115
90
100
110
85
95
105 ns
80
90
100
6.0
78
80
80
CIN Input Capacitance
(Digital Pins)
3.5 10
10
10 pF
CIN Input Capacitance
(Switches Off, Any
Single Analog
Pins)
6.7 15
15
pF
15
CIN Input Capacitance
(Switches Off, Any
Common Analog
Pins)
22 40
40
pF
40
CPD Power Dissipation 3.3
24
pF
Capacitance (*)
5.0
28
(*) CPD 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. ICC(opr) = CPD x VCC x fIN + ICC/8
INJECTION CURRENT COUPLING SPECIFICATION (TA= -55°C to +125°C)
Test Condition
Value
Symbol Parameter
VCC
(V)
TEST CIRCUIT 2
Typ.(1)
Max.
Unit
V∆OUT Shift of Output
3.3
Voltage of Enabled
5.0
Analog Channel
3.3
5.0
IIN ≤ 1mA, RS ≤ 3.9KΩ
IIN ≤ 10mA, RS ≤ 3.9KΩ
0.050
0.100
0.345
0.067
1.0
mV
1.0
5.0
5.0
3.3
5.0
IIN ≤ 1mA, RS ≤ 20KΩ
0.050
0.110
2.0
2.0
3.3
5.0
IIN ≤ 10mA, RS ≤ 20KΩ
0.050
0.024
20
20
1) Typical values are measured at TA=25°C e they are calculate as difference from VOUT without Injection Current and VOUT with Injection
Current.
IIN = total current injected into any other disabled channels, one at time.
5/15
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