HA12211NT Renesas Electronics Corporation., HA12211NT Datasheet - Page 10

• Manufacturer Part Number: HA12211NT
• Description: Audio Signal Processor For Cassette Deck Deck 1 Chip
• Manufacturer: Renesas Electronics Corporation.

HA12211NT
Operating Mode Control
This IC provides fully electronic switching circuits. And each operating mode control is controlled by
parallel data (DC voltage).
Table 2
Pin No.
20, 21, 22, 23
24
Note:
Block Diagram
This IC can be constructed for simple system which has little external parts by used the head serving both
as Recording and Play back because of REC return SW built-in.
With output Hi-Z of REC-EQ and input muting, this IC is realized not only REC mute attenuation
sufficiently but reducing pop noise in REC muting.
Note: Referring to Parallel Data Format also.
Rev.2, Jun. 1997, page 8 of 34
B head
A head
1. 20 to 23 pins are pulled down Lo level, and 24 pin is pulled to Mid level by the inside resistor
2. Over shoot level and under shoot level of input signal must be the standardized.
100kΩ.
(High: V
Threshold Voltage (Vth)
Lo
0.0 to 2.5
0.0 to 1.0
CC
, Low: –0.2V)
Vref
RECOUT
R1
PB IN (B)
PB IN (A)
2
4
5
8
Mid
—
2.0 to 3.0
Figure 2 Block Diagram (Lch)
Hi-Z SW
RETURN SW
B
A
10
R7
+
–
Hi
4.0 to V
4.0 to V
–
+
C7
CC
CC
REC - EQ
12
Unit
V
V
Normal Speed
Normal Tape
PB - A, Tape IN Select
14
Test Condition
Input Pin
+
–
17
29
27
19
R18
R9
C11
PBOUT
C9
Tape IN
AUX IN
V
Measure