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HV2221 Datasheet(PDF) 5 Page - Supertex, Inc

Part # HV2221
Description  Low Charge Injection, 8-Channel, Unipolar, Negative High Voltage, Analog Switch
PDF  8 Pages
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Manufacturer  SUTEX [Supertex, Inc]
Direct Link  http://www.supertex.com
Logo SUTEX - Supertex, Inc

HV2221 Datasheet(HTML) 5 Page - Supertex, Inc

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5
HV2221
Truth Table
D0
D1
D2
D3
D4
D5
D6
D7
LE
CLR
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LL
L
Off
HL
L
On
LLL
Off
HL
L
On
X
X
X
X
X
X
X
X
H
L
Hold Previous State
X
X
X
X
X
X
X
X
X
H
All Switches Off
Notes:
1. The eight switches operate independently.
2. Serial data is clocked in on the L to H transition of the CLK.
3. The switches go to a state retaining their present condition at the rising edge of LE. When LE is low the shift register data flow through the latch.
4. D
OUT is high when data in the shift register 7 is high.
5. Shift register clocking has no effect on the switch states if LE is high.
6. The CLR clear input overrides all other inputs.
Logic Timing Waveforms
DATA
IN
LE
CLOCK
DATA
OUT
OFF
ON
OUT
(TYP )
V
50%
50%
50%
50%
t WLE
t
SD
t
SU
t
h
50%
50%
t OFF
50%
t DO
t ON
t WCL
CLR
D
N– 1
D
N
D
N+ 1
50%
50%
90%
10%



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