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PDF M74HC4851 Data sheet ( Hoja de datos )
| Número de pieza | M74HC4851 | |
| Descripción | SINGLE 8 CHANNEL ANALOG MUX/DEMUX WITH INJECTION CURRENT PROTECTION | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M74HC4851
SINGLE 8 CHANNEL ANALOG MUX/DEMUX
WITH INJECTION CURRENT PROTECTION
s LOW POWER DISSIPATION:
ICC = 2µA(MAX.) at TA=25°C
s INJECTION CURRENT PROTECTION:
V∆OUT<1mV at VCC=5V IIN≤1mA RS≤3.9KΩ
s "ON" RESISTANCE at TA=25°C:
215Ω TYP. (VCC = 3.0V)
150Ω TYP. (VCC = 4.5V)
160Ω TYP. (VCC = 6V)
s FAST SWITCHING:
tpd = 8.6ns (TYP.) at TA = 25 °C, VCC = 4.5V
s WIDE OPERATING SUPPLY VOLTAGE
RANGE: VCC = 2V TO 6V
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28 % VCC (MIN.)
s PIN AND FUNCTION COMPATIBLE WITH
SERIES 4051, 4851
s LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
s ESD PERFORMANCE:
HBM > 2000V (JESD22-A114B);
MM > 200V
DESCRIPTION
The M74HC4851 is a single eight-channel analog
MULTIPLEXER/DEMULTIPLEXER fabricated
with silicon gate C2MOS technology.
It is pin to pin compatible with the equivalent to
standard HC4051 and MC14051, but feature
injection current effect control. This make this
device expecially suited for usage in automotive
applications where voltages in excess of normal
PIN CONNECTION AND IEC LOGIC SYMBOLS
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
T&R
SOP M74HC4851M1R M74HC4851RM13TR
TSSOP
M74HC4851TTR
logic voltage are common. The injection current
effect control allows signals at disabled input
channels to exceed the supply voltage range or go
down ground without affecting the signal of the
enabled analog channel. This eliminated the need
for external diode-resistor networks typically esed
to keep the analog channel signals within the
supply voltage range. This analog switch is
bidirectional and digitally controlled. It have three
binary control inputs A, B, abd C to select 1 of 8 to
be turned on, and connected to the output, and a
INH input to disable all channel.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
September 2002
1/11
1 page  
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
Time, Analog Input
to Analog Output
tPHL,tPLH Propagation Delay
Time
Channel-Select to
Analog Output
tPHZtPZH Enable Disable
tPLZ,tPZL
Time, Enable or
Channel-Select to
Analog Output
CIN Input Capacitance
(Digital Pins)
CIN Input Capacitance
(Switches Off, Any
Single Analog
Pins)
CIN Input Capacitance
(Switches Off, Any
Common Analog
Pins)
CPD Power Dissipation
Capacitance (*)
2.0
3.0
3.3
4.5
6.0
2.0
3.0
3.3
4.5
6.0
2.0
3.0
3.3
4.5
6.0
3.3
5.0
19.5
12
11
8.6
8
23
13.5
12.5
10
9.5
25
15.5
14.5
11.5
10
30
17.5
16.5
13
12.5
95
90
85
80
78
3.5 10
6.7 15
29
17.5
16.5
12.5
11
35
20
19
15
14.5
105
100
95
90
80
10
15
22 40
24
28
40
32
19.5
18.5
13.5
12
40
23
22
17
16.5
115
110
105
100
80
10
15
ns
ns
ns
pF
pF
pF
40
pF
(*) 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)
Symbol Parameter
Test Condition
VCC
(V)
TEST CIRCUIT 2
Value
Typ.(1)
Max.
Unit
V∆OUT Shift of Output
Voltage of Enabled
Analog Channel
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
IIN ≤ 1mA, RS ≤ 3.9KΩ
IIN ≤ 10mA, RS ≤ 3.9KΩ
IIN ≤ 1mA, RS ≤ 20KΩ
IIN ≤ 10mA, RS ≤ 20KΩ
0.050
0.100
0.345
0.067
0.050
0.110
0.050
0.024
1.0 mV
1.0
5.0
5.0
2.0
2.0
20
20
1) Typical values are measured at TA=25°C e they are calculate as differance from Vout without Injection Current and Vout with Injection
Current.
IIN = total current injected into any other disabled channels, one at time.
5/11
5 Page 
M74HC4851
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
© The ST logo is a registered trademark of STMicroelectronics
© 2002 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.
© http://www.st.com
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| PDF Descargar | [ Datasheet M74HC4851.PDF ] | |
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