BD37531FV-E2 ROHM [Rohm], BD37531FV-E2 Datasheet - Page 34

• Manufacturer Part Number: BD37531FV-E2
• Description: Sound Processors with Built-in 3-band Equalizer
• Manufacturer: ROHM [Rohm]

●Notes for use
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BD37531FV,BD37532FV,BD37533FV,BD37534FV
www.rohm.com
3. About Mute terminal(15pin) when power supply is off
1. Absolute maximum rating voltage
2. About a signal input part
4. About TEST Pin
1）About constant set up of input coupling capacitor
2) About the input selector SHORT
When it impressed the voltage on VCC more than the absolute maximum rating voltage, circuit currents increase
rapidly, and there is absolutely a case to reach characteristic deterioration and destruction of a device.
In particular in a serge examination of a set, when it is expected the impressing serge at VCC terminal (24pin),
please do not impress the large and over the absolute maximum rating voltage (including a operating voltage
+ serge ingredient (around 14V)).
In the signal input terminal, the constant setting of input coupling capacitor C(F) be sufficient input
impedance R
SHORT mode is the command which makes switch S
terminals, and makes resistance small. Switch S
A constant time becomes small at the time of this command twisting to the resistance inside the capacitor
connected outside and LSI. The charge time of a capacitor becomes short. Since SHORT mode turns ON the switch
of S
Any voltage shall not be supplied to Mute terminal (15pin) when power-supply is off.
Please insert a resistor (about 2.2kΩ) to Mute terminal in series, if voltage is supplied to mute terminal
in case. (Please refer Application Circuit Diagram.)
About TEST Pin, please use with OPEN.
About BD37531FV and BD37532FV, 14,16,17pin are TEST Pin. About BD37533FV, 16,17pin are TEST Pin.
SH
C〔F〕
and makes it low impedance, please use it at the time of a non-signal.
INPUT
IN
(Ω) inside IC and please decide. The first HPF characteristic of RC is composed.
〔Ω〕
RIN
Ｓ
Ｓ
SH
=ON an input selector part and input impedance RIN of all
34/37
SH
is OFF when not choosing a SHORT command.
A(f)
G〔dB〕
0
A(f)

1

(2πfCR
(2πfCR
IN
IN)
)
2
Technical Note
2010.03 - Rev.A
2
f〔Hz〕