HA12167FB/HA12169FB
19
Operating Mode Control
HA12167FB/HA12169FB provides fully electronic switching circuits. All switches are controlled by serial
data.
Table 2 Threshold Voltage (VTH)
Pin No. Lo Hi Unit
42 –0.2 to 1.5 3.5 to 5.3 V
39, 40, 41 –0.2 to 1.0 4.0 to 5.3 V
Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 47 (DGND pin) as
reference pin. On split supply use, same VTH can be offered by connecting DGND pin to GND
pin.
This means that it can be controlled directly by micro processor.
2. Each pins are on pulled down with 100 k internal resistor.
Therefore, it will be low-level when each pins are open.
3. Note on serial data inputting
(a) The clock frequency on CLK must be less than 500 kHz.
(b) Over shoot level and under shoot level of input signal must be the value shown below.
When connecting microcomputer or Logic-IC with HA12167FB/HA12169FB directly, there is
apprehension of rash-current under some transition timming of raising voltage or falling voltage at V
CC
ON/OFF.
For this countermeasure, connect 10 k to 20 k resistor with each pins. It is shown in test circuit on this
data sheet.
In case of changing NR-ON/OFF at the C-mode, for the countermeasure of the noise of pop, perform the
following processes.
In case of changing NR-OFF to NR-ON at C-mode. C-mode, NR-OFF → B-mode, NR-OFF → B-mode,
NR-ON → C-mode, NR-ON.
In case of changing NR-ON to NR-OFF at C-mode. C-mode, NR-ON → B-mode, NR-ON → B-mode,
NR-OFF → C-mode, NR-OFF.
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