HV20420/HV20620
Truth Table
Notes:
D0 D1 D2 D3 D4 D5 D6 D7 LE CL SW0 SW1 SW2 SW3 SW4 SW5 SW6 SW7
1. The eight switches operate
independently.
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
OFF
ON
2. Serial data is clocked in on
the L→ H transition CLK.
H
L
OFF
ON
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 flows through
the latch.
H
L
OFF
ON
H
L
OFF
ON
4. D
is high when switch 7 is
OUT
H
on.
L
OFF
ON
5. Shift register clocking has no
effect on the switch states if
LE is H.
H
L
OFF
ON
6. The clear input overrides all
other inputs.
H
L
OFF
ON
H
L
H
X
X
OFF
ON
X
X
X
X
X
X
X
X
X
X
X
X
X
X
HOLD PREVIOUS STATE
OFF OFF OFF OFF OFF OFF OFF OFF
Test Circuits
VPP –10V
RL 10KΩ
ISOL
VPP –10
VOUT
VOUT
100KΩ RL
VNN +10
15V
15V
15V
VPP
VNN
VPP
VNN
VDD
VPP
VNN
VPP
VNN
VDD
VPP
VNN
VPP
VNN
VDD
GND
GND
GND
13
Switch OFF Leakage
DC Offset ON/OFF
TON/TOFF Test Circuit
+VSPK
VIN = 10 VP–P
V
IN = 10 VP–P
@5MHz
@5MHz
VOUT
–VSPK
50Ω
50Ω
VOUT
NC
RL
50Ω
1K
15V
15V
15V
VPP
VNN
VPP
VNN
VDD
VPP
VNN
VPP
VNN
VDD
VPP
VNN
VPP
VNN
VDD
GND
GND
GND
VOUT
V
IN
VOUT
V
IN
KO = 20Log
KCR = 20Log
OFF Isolation
Output Voltage Spike
Crosstalk
13-35
SUPERTEX [ Supertex, Inc ]
