HA12237F Datasheet, PDF (5/33 Pages) Renesas Technology Corp – Audio Signal Processor for Cassette Deck

HA12237F
Functional Description
Power Supply Range
This IC designed to operate on single supply, shown by table 1.
Table 1 Supply Voltage
Single supply
Item
Power Supply Range
6.5 V to 15.0 V
Reference Voltage
This device provide the reference voltage of half the supply voltage that is the signal grounds. As the peculiarity of this
device, the capacitor for the ripple filter is very small about 1/100 compared with their usual value. The block diagram
is shown as figure 1.
V_CC
16
+
−
PB Line Amp. block
+
−
33
36
+ _{1 µF}
+
−
Lch REC-EQ block
Rch REC-EQ block
Figure 1 Block Diagram of Reference Supply Voltage
Operating Mode Control
HA12235F provide fully electronic switching circuits. And each operating mode control is controlled by parallel data
(DC voltage).
Table 2 Threshold Voltage (V_TH)
Pin No.
11 to 15
Lo
–0.2 to 0.5
Mid
—
Hi
2.4 to V_CC
Unit
V
Test Condition
Input Pin Measure
V
Notes: 1. Each pins are on pulled down with 100 kΩ internal resistor. Therefore, it will be low-level when each pins are
open.
2. Over shoot level and under shoot level of input signal must be the standardized.
(High: V_CC, Low: –0.2 V)
Test Mode
Test mode becomes when pin 20 is shorted to GND. Please open pin 20 on the occasion of mount.
Rev.1.00 Jun 15, 2005 page 5 of 32