HA12173 Series
Audio Signal Processor for Car Deck and Cassette Deck
(Dolby B/C-type NR with PB Amp)
ADE-204-016
1st Edition
Nov. 1992
Description
HA12173 series are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor
and PB equalizer system in one chip.
Functions
PB equalizer
2 channel
Dolby B/C-NR
2 channel
Music sensor
1 channel
Features
Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully
electronic control switching built-in.
2 type of input selection (RADIO/TAPE) is available.
Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.
Available to change music sensing level by external resistor.
Music sensing level selection is available with fully electronic control switching built-in.
Available to change frequency response of music sensor.
NR-ON/OFF and REC/PB fully electronic control switching built-in.
4 type of PB-out level.
Available to allow common PCB designs with HA12163 series.
*
Dolby is a trademark of Dolby Laboratories Licensing Corporation.
A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
HA12173 Series
Rev.1, Nov. 1992, page 2 of 66
Ordering Information
Operating voltage range*
1
Products
PB-OUT level
REC-OUT level
Dolby-level
Min
Max
HA12173
300 mVrms
300 mVrms
300 mVrms
7.0V
16V
HA12174
450 mVrms
300 mVrms
300 mVrms
8.0V
16V
HA12175
580 mVrms
300 mVrms
300 mVrms
9.5V
16V
HA12177
775 mVrms
300 mVrms
300 mVrms
12.0V
16V
Note:
1. The minimum operating voltage of HA12173 series are defferent from the HA12163 series
(Dolby B - type).
Pin Description (V
CC
= 9 V Single supply, Ta = 25C, No signal, The value in the table
show typical value)
Pin No.
Terminal
name
Zin
DC
voltage Equivalent circuit
Description
2, 41
TAI
100 k
V
CC
/2
V
CC
/ 2
Tape input
4, 39
RAI
Radio input
25
MSI
Music sensor
rectifier input
10, 33
HLS DET
--
2.5 V
Time constant
pin for rectifier
11, 32
LLS DET
3
BIAS
--
0.28 V
GND
Reference
current input
HA12173 Series
Rev.1, Nov. 1992, page 3 of 66
Pin Description (V
CC
= 9 V Single supply, Ta = 25C, No signal, The value in the table
show typical value) (cont)
Pin No.
Terminal
name
Zin
DC
voltage Equivalent circuit
Description
24
MS DET
--
V
CC
GND
Time constant
pin for rectifier
19
MS GV
100 k
--
DGND
GND
Mode control
input
40
RIP
--
V
CC
/2
Ripple filter
HA12173 Series
Rev.1, Nov. 1992, page 4 of 66
Pin Description (V
CC
= 9 V Single supply, Ta = 25C, No signal, The value in the table
show typical value) (cont)
Pin No.
Terminal
name
Zin
DC
voltage Equivalent circuit
Description
43, 56
EQ OUT
--
V
CC
/2
GND
V
CC
Equalizer output
6, 37
PB OUT
Play back
(Decode) output
30
MS V
REF
Reference
voltage buffer
output
26
MA OUT
Music sensor
amp output
47, 52
V
REF
Reference
voltage buffer
output
12, 31
REC OUT
Recording
(Encode) output
8, 35
SS2
Spectral skewing
amp. output
44, 55
EQ OUT-M
--
V
CC
/2
GND
V
CC
Equalizer output
(Metal)
HA12173 Series
Rev.1, Nov. 1992, page 5 of 66
Pin Description (V
CC
= 9 V Single supply, Ta = 25C, No signal, The value in the table
show typical value) (cont)
Pin No.
Terminal
name
Zin
DC
voltage Equivalent circuit
Description
21
MS OUT
--
--
D GND
MS V
CC
Music sensor
output to MPU
22
V
CC
--
V
CC
--
Power supply
23
MS V
CC
20
D GND
--
0V
--
Digital (Logic)
ground
27
MS GND
Music sensor
ground
49, 50
GND
Ground
48, 51
FIN
--
V
CC
/2
PB - EQ input for
forward
46, 53
RIN
PB - EQ input for
reverse
45, 54
NFI
Negative
feedback
terminal of PB -
EQ amp.
28
NOI
Negative
feedback input
for normal speed
29
FFI
Negative
feedback input
for FF or REW
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