DG221 データシートの表示（PDF） - Vishay Semiconductors
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DG221 Datasheet PDF : 6 Pages
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DG221
Test Circuits
+15 V
V+
2V
S
D
VO
IN
GND WR V–
RL
1 kW
CL
35 pF
–15 V
3V
Logic
Input 0 V
Switch
Input
VS
Switch
Output
VO
CL (includes fixture and stray capacitance)
VO = VS
RL
RL + rDS(on)
Figure 2. Switching Time
50%
tr < 10 ns
tf < 10 ns
90%
tON
tOFF
+15 V
0V
WR
V+
2V
S
D
VO
IN
RL
CL
GND
V–
1 kW
35 pF
–15 V
CL (includes fixture and stray capacitance)
3V
WR
0V
3V
IN
0V
VS
VOUT
VO
tON, WR
50%
90%
tr < 10 ns
tf < 10 ns
tOFF, WR
VO = VS
RL
RL + rDS(on)
Figure 3. WR Switching Time
3V
IN
3V
WR
VOUT
50%
tS
tH
tS
tH
50%
tW
tH = Hold Time
tS = Setup Time
tW = WR Pulse Width
The latches are level sensitive. When WR is held low the latches are transparent and the switches
respond to the digital inputs. The digital inputs are latched on the rising edge of WR.
Figure 4. WR Setup Conditions
4
Siliconix
S-52881—Rev. C, 28-Apr-97
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