dg221 ETC-unknow, dg221 Datasheet - Page 6

• Manufacturer Part Number: dg221
• Description: Quad Spst Cmos Analog Switch With Latches
• Manufacturer: ETC-unknow

Applications
Notes:
a.
DG221
6
WR may be held at “0” for temporary operation similar to DG201A/DG201B. With WR at “0” SW
IN
0
1
0
1
1
1
1
Address Bus
WR
IN
Data Bus
0
1
1
0
1
1
2
IN
Truth Table
0
1
1
1
0
1
3
CS
Address
Decoder
IN
0
1
1
1
1
0
4
Figure 8.
WR
0
0
0
0
0
0
The TL081 is used as an output buffer while
the voltage divider provides attenuation.
a
P-Controlled Analog Signal Attenuator
Switch
IN
IN
IN
IN
WR
All
None
1
2
3
4
On
1
2
3
4
GND
DG221
WR
+15 V
0
0
0
0
V+
D
C
D
C
D
C
D
C
Q
Q
Q
Q
–15 V
V–
IN
Output Attenuation for Figure 8
0
1
1
1
1
S
S
S
S
D
D
D
D
1
2
3
4
1
2
3
4
1
IN
will remain on as long as IN
1
0
1
1
2
S-52881—Rev. C, 28-Apr-97
IN
1
1
0
1
3
–
TL081
+
V
IN
9 M
900 k
90 k
9 k
1 k
IN
1
1
1
0
4
1
Siliconix
is held at “0”.
Gain
0.1
0.01
0.001
0.0001
V
O