HA12173 Series
Table 3 Switching Truth Table
Pin No.
Low
High
13
B - NR
C - NR
14
NR - OFF
NR - ON
15
PB
REC
16
TAPE
RADIO
17
120 µ (NORMAL)
70 µ (METAL or CHROME)
18
FORWARD
REVERSE
19
SER (FF or REV)
REP (NORMAL SPEED)
Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 20 (DGND pin) as
reference pin. On split supply use, same V can be offered by connecting DGND pin to GND
TH
pin.
This means that it can be controlled directly by microprocessor. But power supply should be
over ±5 V, notwithstanding the prescription of table 1.
2. Each pins are on pulled down with 100 kΩ internal resistor.
Therefore, it will be low-level when each pins are open.
3. Over shoot level and under shoot level of input signal must be the standardized (High: 5.3 V,
Low: –0.2 V)
4. When connecting microcomputer or Logic-IC with HA12173 series directly, there is apprehension
of rush-current under some transition timming of raising voltage or falling voltage at VCC ON/OFF.
On using, connect protective resistors of 10 to 22 kΩ to all the control pins. It is shown is test
circuit on this data sheet. And pins fixed to low level should be preferably open.
5. Pay attention not to make digital GND voltage lower than GND voltage.
Rev.1, Nov. 1992, page 13 of 66