DG409DJ Vishay, DG409DJ Datasheet - Page 12

• Manufacturer Part Number: DG409DJ
• Description: Analog Multiplexer Dual 4:1 16-Pin PDIP
• Manufacturer: Vishay
• Type: Analog Multiplexerr

Specifications of DG409DJ

• Package: 16PDIP
• Maximum On Resistance: 100@±15V Ohm
• Maximum Propagation Delay Bus To Bus: 250@±15V@-40C to 85C|180(Typ)@12V ns
• Maximum High Level Output Current: 30 mA
• Multiplexer Architecture: 4:1
• Maximum Turn-off Time: 150@±15V ns
• Maximum Turn-on Time: 180(Typ)@12V ns
• Power Supply Type: Single|Dual

DG408, DG409
Vishay Siliconix
APPLICATION HINTS
Overvoltage Protection
A very convenient form of overvoltage protection consists of
adding two small signal diodes (1N4148, 1N914 type) in
series with the supply pins (see figure 10). This arrangement
effectively blocks the flow of reverse currents. It also floats
the supply pin above or below the normal V+ or V- value. In
this case the overvoltage signal actually becomes the power
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see www.vishay.com/ppg?70062.
www.vishay.com
12
Enable In
Clock
(MUX On-Off Control)
In
8-Channel Sequential Multiplexer/Demultiplexer
NC
(Outputs)
Analog
Inputs
B
A
DM7493
r
01
IN
IN
+ 15 V
+ 15 V
r
02
GND
Q
Q
Q
Q
B
C
D
A
+ 15 V
S
S
S
S
S
S
S
S
A
NC
V+
1
2
3
4
5
6
7
8
0
A
DG408
GND
Fig. 10 - Overvoltage Protection Using Blocking Diodes
1
A
V
2
- 15 V
g
EN
V-
D
Analog
Output
S
X
(Input)
Reset Enable
Clock
Fig. 11
In
V+
V-
Differential 4-Channel Sequential Multiplexer/Demultiplexer
supply of the IC. From the point of view of the chip, nothing
has changed, as long as the difference VS - (V-) does not
exceed + 44 V. The addition of these diodes will reduce the
analog signal range to 1 V below V+ and 1 V above V-, but it
preserves the low channel resistance and low leakage
characteristics.
1N4148
1N4148
DG408
Differential
(Outputs)
Analog
Inputs
J
CLK
K
CLEAR
1/2 MM74C73
+ 15 V
GND
D
Q
Q
+ 15 V
NC
S
S
S
S
S
S
S
S
V+
1a
2a
3a
4a
1b
2b
3b
4b
A
0
DG409
GND
A
1
J
1/2 MM74C73
CLK
K
- 15 V
S10-1474-Rev. I, 05-Jul-10
EN
Document Number: 70062
V-
CLEAR
D
D
a
b
6
Differential
Q
Q
Outputs
(Inputs)
Analog
NC