Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
HEF4053 (continued)
Pinning
Y
0A
to Y
0C
Independent inputs/outputs
Y
1A
to Y
1C
Independent inputs/outputs
S
A
to S
c
Select inputs
E Enable input (active LOW)
Z
A
to Z
C
Common inputs/outputs
3. Function Table
Inputs Channel
E Sn On
L L Y
0
n-Zn
L
H Y
1
n-Zn
H X none
Notes
H=HIGH state (the more positive voltage)
L=LOW state (the less positive voltage)
X=STATE is immaterial
Pinning Diagram
Fig. 12 Schematic Diagram (One Switch)
Ratings
Limiting values in accordance with the Absolute Maximum System(IEC 134)
Supply voltage (with reference to V
DD
) V
EE
-18 to + 0,5 V
Note
To avoid drawing V
DD
current out of terminal Z, when switch current flows into terminals Y, the voltage
drop across the bidirecctional switch must not exceed 0,4 V. If the switch current flows into terminal Z,
no V
DD
current will flow out of terminals Y, in this case there is no limit for the voltage drop across the
switch, but the voltages at Y and Z may not exceed V
DD
or V
EE
4. Refer to Table 9 about Functions and Data of IC
s Each Pin.
18