HA12207NT
Audio Signal Processor for Cassette Deck
ADE-207-197B (Z)
3rd Edition
Jun. 1999
Description
HA12207NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each
electronic control switch in one chip.
Functions
• PB equalizer
× 2 channel
• REC equalizer
× 2 channel
• Each electronic control switch to change REC/PB etc.
• REC MUTE
• REC head return switch
Features
• REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics.
• PB equalizer circuit built-in.
• REC /PB of high speed mode are possible with TYPE 1(Normal tape).
• Controllable from direct micro-computer output.
• Available to reduce substrate-area because of high integration and small external parts.
• As the pins arrangement resembles HA12185NT, it can design the board that is replaced with
HA12185NT.
HA12207NT
Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal,
The value in the table show typical value.)
Pin No.
Pin Name
Note
1
VCC
V = VCC
2
RECOUT (L)
V = Vref
Equivalent Circuit
Pin Description
VCC pin
VCC
REC-EQ output
GND
3
RECOUT (R)
4
REC-RETURN
V = Vref
V ’= Vref
VCC
REC return
I
V
4
V’
5 pin, 6 pin
I
GND
5
PB-IN B (L)
6
PB-IN B (R)
7
VREF
PB B Deck input
V = Vref
V’ = VCC / 2
Reference
VCC
+ –
PB-IN
10k
V'
V
10k
GND
8
PB-IN A (L)
V = Vref
VCC
PB A deck input
V
9
PB-IN A (R)
Rev.3, Jun. 1999, page 2 of 27
HA12207NT
Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal,
The value in the table show typical value.)
Pin No.
Pin Name
Note
10
PB-NF (L)
PB-IN = Vref
Equivalent Circuit
Pin Description
VCC
PB EQ feed back
PB-IN
330k
180
7
11
PB-NF (R)
12
PB-EQ (L)
PBOUT = Vref
NAB output
PBOUT
GND
13
PB-EQ (R)
20
REC IN (R)
VCC
V = Vref
REC-EQ input
V
100k
Vref 7
21
REC IN (L)
14
PBOUT (R)
15
PBOUT (L)
V = Vref
VCC
PB output
GND
Rev.3, Jun. 1999, page 3 of 27
HA12207NT
Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal,
The value in the table show typical value.)
Pin No.
Pin Name
Note
16
A/B
I = 20µA
Equivalent Circuit
Pin Description
VCC
Mode control input
I
22k
100k
GND
17
HSP
18
MUTE
19
IREF
V = 1.9V
Equalizer
reference current
input
V
22
GND
Rev.3, Jun. 1999, page 4 of 27
GND pin
1
VCC
22
GND
21
5.6k
2
20
Bias
5.6k
3
R-ch
REC-IN(L)
L-ch
REC-OUT(L)
REC-IN(R)
REC-OUT(R)
12dB
19
IREF
REC-EQ
4
REC-RETURN
PB-IN
5
B(L)
18
HSP
B(R)
PB-IN
L-ch
6
17
+
470µ
7
16
/B
VREF
PB-OUT(L)
B
R-ch
(R)
+
–
120µ
60µ
PB-EQ PB-EQ
13
12
A
14
(L)
PB-IN
PB-IN PB-NF PB-NF
9
8
10
11
(L)
(R)
A(L)
A(R)
15
PB-OUT(R)
0.01µ 0.01µ
Unit R : Ω
C:F
GND
VCC
HA12207NT
Block Diagram
Rev.3, Jun. 1999, page 5 of 27
HA12207NT
Parallel Data Format
Pin No.
Pin Name
L
H
17
HSP
Normal *
Hi speed
16
A/B
Ain active *
Bin active
Return SW ON *
Return SW OFF
REC OUT active *
REC OUT HIZ
MUTE ON *
MUTE OFF
18
MUTE
Note: Unforced pin state
Rev.3, Jun. 1999, page 6 of 27
HA12207NT
Functional Description
Power Supply Range
HA12207NT is designed to operate on single supply, shown by table 1.
Table 1
Supply Voltage
Item
Power Supply Range
Single Supply
9.5V to 15.0V
Reference Voltage
As AC reference (Vref) of this IC has not a current drivability, Vref fluctuates by A/B switching of PB-EQ.
Provided it causes you anxiety, please supply 7 pin with approximate 1/2 VCC voltage.
For example, a suitable circuit is shown by figure 1.
This IC has a capacitor charger for the Vref, indicated to the pin interface circuit figure.
1
VCC
Lch PB-EQ Reference voltage
Lch REC-EQ Reference voltage
470Ω
Rch REC-EQ Reference voltage
Rch PB-EQ Reference voltage
22
7
GND
Vref
+
470µF
Figure 1 Reference Voltage Circuit
Rev.3, Jun. 1999, page 7 of 27
HA12207NT
Operating Mode Control
HA12207NT provides fully electronic switching circuits. And each operating mode control is controlled by
parallel data (DC voltage).
Table 2 shows the control voltage of each control input pin.
Table 2
Control Voltage (Vth)
Pin No.
Lo
Hi
Unit
16, 17
0.0 to 1.0
4.0 to VCC
V
Test Condition
Input Pin
Measure
V
18
Note:
0.0 to 3.0
4.0 to VCC
V
1. Each pin is pulled down with 100kΩ internal resistor. 16 to 18 pins are low-level when each pin is
open.
2. Over shoot level and under shoot level of input signal must be the standardized.
(High: Less than VCC, Low: More than –0.2V)
Block Diagram
Figure 2 shows the block diagram.
As this IC is built-in REC return switch, the configuration system can be simple system using a few
external component and the REC/PB head.
As this IC adopted Hi-z SW of REC-EQ output and the input mute system, it realizes REC mute
attenuation and pop-noise reduction securing in REC mute.
About these logics, please look at the Parallel Data Format.
RECOUT
–
+
2
REC - EQ
REC IN
21
Hi-Z SW
4
RETURN SW
B head
PB IN(B)
5
8
A head
B
PBOUT
15
+
–
A
PB IN(A)
7
Vref
10
13
Figure 2 Block Diagram (Lch)
Rev.3, Jun. 1999, page 8 of 27
Normal Speed
PB - A
HA12207NT
Level Block Diagram
The gain establishment of PB-EQ considers PB output level {(external AMP+PB AMP)=300mV(Dolby
Level)} like figure 3 as the target.
Regarding REC-EQ adjust the gain in front of input to this IC.
The level diagram of 1kHz is shown figure 4. (Normal speed)
Similarly to PB, it consider Dolby level as a standard. And R1 needs the value more than 5.6kΩ.
Because mode establishment resistances are built-in, REC-EQ frequency characteristics are respectively
fixed value.
In case the change of the frequency characteristics are necessary, please inquire the responsible agent
because the adjustment of resistors is necessary.
300mV
(Dolby level)
HA12134A
63.6mV
0.6mV
40.5dB
PB-EQ
20dB
Dolby IC
Figure 3 PB Level Block Diagram (Normal Speed, 1kHz)
Rev.3, Jun. 1999, page 9 of 27
HA12207NT
1.8V
REC - EQ Clip level
300mV
(Dolby level)
263mV
100mV
1kHz
REC - EQ
Figure 4 REC Level Block Diagram (Normal Speed, 1kHz)
Absolute Maximum Rating (Ta = 25°C)
Item
Symbol
Rating
Unit
Max supply voltage
VCC max
16
V
Power dissipation
Pd
500
mW
Operating temperature
Topr
–40 to +75
°C
Storage temperature
Tstg
–55 to +125
°C
Operating voltage
Vopr
9.5 to 15
V
Note: HA12207NT operates on single supply voltage.
Rev.3, Jun. 1999, page 10 of 27
Note
Ta≤75°C
IQ
VIL(1)
VIL(2)
VIH
CT PB/REC(1)
Quiescent current
Logical threshold
—
—
50
60
THD PB
VN PB
CT R/L(1)
CT A/B
PB-EQ THD
PB-EQ noise voltage
PB-EQ
channel separation
PB-EQ crosstalk
Note: 1. Large level without clipping
2. VCC=9.5V, Vref=4.75V
PB-EQ
maximum output
70
0.1
90
60
40.5
36.2
30.5
0.6
37.5
33.2
27.5
0.3
PB-EQ gain
GV PB(1)
GV PB(2)
GV PB(3)
Vomax PB
22.4
—
—
—
60
70
16.0
-0.2
-0.2
4.0
50
dB
dB
dB
Vrms
dB
mA
V
V
V
dB
A/B
A/B
A/B
A/B
A
—
—
—
A/B
A
/B
—
dB
A
B
A/B
0.5 %
180 µVrms A/B
A/B
—
dB
43.5
39.2
33.5
—
—
32.0
1.0
3.0
VCC
—
Min Typ Max Unit
CT PB/REC(2) 60
PB-REC crosstalk
Symbol
Item
1k
10k
20k
1k
Normal
Normal
High
Normal
Normal Mute
Normal Mute
Normal Mute
Normal Mute
1k
1k
—
1k
1k
Normal Mute
OFF
Mute
Mute
Mute
Mute
—
—
—
—
1k
fin
(Hz)
MUTE
—
—
—
Mute
OFF
Normal
—
—
—
Normal
HSP
Test Condition
IC Condition
L
R
L
15
15
15
15
2
6
9
5
8
14 15
14
14
14
14
3
*1
8/5
8/5
8/5
8/5
8
9/6 8/5 14 15
Rg=820Ω, DIN-AUDIO 9/6 8/5 14 15
8/5 9/6 14 15
9/6
9/6
9/6
9/6
9
20 21 14 15
R
0.6
—
*1
THD=1%*2
PB-EQ → REC-EQ
*1
0.6
0.6
0.6
—
REC-EQ → PB-EQ
—
—
—
—
*1
No signal
Vin
(mVrms)Other
16, 17
18
16, 17, 18
1
COM
Application Terminal
Input Output
HA12207NT
Electrical Characteristics (Ta = 25°C, VCC = 10.5V, Vref = 5.25V)
Rev.3, Jun. 1999, page 11 of 27
Normal Mute
OFF
Normal Mute
OFF
Mute
OFF
A
A
10.3 12.3 14.3 dB
18.7 21.7 24.7 dB
GV REC-NN2
GV REC-NN3
Rev.3, Jun. 1999, page 12 of 27
High
Normal Mute
OFF
Normal Mute
Normal Mute
OFF
Normal Mute
OFF
A
A
A
A
A
19.9 22.9 25.9 dB
GV REC-HN3
0.35 0.7
56
—
52
THD REC
S/N REC
REC-EQ THD
REC-EQ S/N
Note: 3. Large level without clipping
4. VCC=9.5V, Vref=4.75V
Vrms
—
1.8
1.2
Vomax REC
REC-EQ
maximum output
—
%
—
80
70
R-MUTE ATT
REC-MUTE
attenuation
dB
%
dB
—
60
50
CT R/L(2)
A
High
A
12.1 14.1 16.1 dB
GV REC-HN2
Normal Mute
OFF
Mute
OFF
Mute
OFF
High
A
10.6 dB
9.1
7.6
GV REC-HN1
REC-EQ
channel separation
REC-EQ frequency
response
High speed
Normal Mute
OFF
A
9.9
dB
8.4
6.9
GV REC-NN1
HSP
REC-EQ frequency
response
Normal speed
/B
Symbol
Item
Min Typ Max Unit
Test Condition
IC Condition
—
1k
1k
1k
1k
20k
10k
2k
10k
5k
1k
fin
(Hz)
L
R
—
100
Rg=5.1kΩ, A-WTG
20 21 3
20 21 3
20 21 3
20 21 3
*3
—
20 21 3
*3
20 21 3
20 21 3
20 21 3
20 21 3
20 21 3
THD=1%*4
R
20 21 3
10
10
10
10
10
10
Vin
(mVrms)Other
2
2
2
2
2
2
2
2
2
2
2
L
COM
Application Terminal
Input Output
HA12207NT
Electrical Characteristics (Ta = 25°C, VCC = 10.5V, Vref = 5.25V) (cont)
AC VM1
ON
Audio-SG
OFF
SW4
C14
470µ
VCC2
VCC1
+
SW8
R14
470
R1
5.6k
SW10
Ain
Bin
SW9
4
Lch
Rch SW7
+
Rch
Lch
Rch
Lch
R2
5.6k
C2
2.2µ
3
+
2
C1
2.2µ
1
C13
100µ R13
470
+
DC
DC
SOURCE 1 SOURCE 2
PB
REC
19
+
20
C11
0.1µ
VCC
+
21
C12
0.1µ
REC-IN(L)
REC-OUT (L)
R9
22k
REC-IN(R)
REC-OUT (R)
GND
22
R10
5.1k
NotMute
R3
820
5
16
Hi
820
C3
22µ
+ R4
6
C4
22µ
+
7
+
15
R5
820
C10
2.2µ
SW1
17
SW2
Ain
HA12207NT (DP-22S)
18
Mute
SW3
B(L)
R11
5.1k
IREF
REC-RETURN
Nor
IREF
B(R)
R8
10k
+
8
820
C5
22µ
14
+ R6
C9
2.2µ
R7
10k
9
PB-OUT(L)
A(L)
C6
22µ
+
10
11
12
C8
0.01µ
C7
0.01µ
SW11
13
Rch
PB⋅EQ(L)
PB-NF(L)
Lch
PB-OUT(R)
A(R)
Lch
PB⋅EQ(R)
PB-NF(R)
Rch
Bin
/B
VREF
SW5
SW6
DISTORTION
SW12
OSCILLO NOISE
SCOPE METER
Unit R : Ω
C:F
NOISE METER WITH
AÆWTG FILTER
AND DIN-AUDIO FILTER
AC VM2 ANALYZER
REC
PB
HA12207NT
Test Circuit
Rev.3, Jun. 1999, page 13 of 27
HA12207NT
Characteristic Curves
Quiescent Current vs. Supply Voltage
Quiescent Current (mA)
25
Ain, Normal speed
Ain, High speed
Bin, Normal speed
Bin, High speed
20
15
10
8
10
12
Supply Voltage (V)
16
14
VTH vs. Supply Voltage (1)
4
Ain/Bin
VIH
VTH (V)
3
VIL
2
VIL VIH
Check level ±0.5dB
1
8
Rev.3, Jun. 1999, page 14 of 27
10
12
Supply Voltage (V)
14
16
HA12207NT
VTH vs. Supply Voltage (2)
4
Speed Normal/High
VTH (V)
3
VIH
VIL
2
VIL VIH
Check level ±0.5dB
1
8
10
12
Supply Voltage (V)
16
14
VTH vs. Supply Voltage (3)
4
Mute ON/OFF
VIH
VIL
VTH (V)
3
2
VIL VIH
Check level ±0.5dB
1
8
10
12
Supply Voltage (V)
14
16
Rev.3, Jun. 1999, page 15 of 27
HA12207NT
Altered Reference Voltage vs. External Impedance
500
VCC
Vref
1
7
VCC=10.5V
Normal speed
R
400
∆ Vref (mV)
R
300
200
100
0
100
500
1k
5k 10k
50k 100k
External Bleeder Resistor R (Ω)
500k 1M
REC-EQ→PB-EQ Mode Crosstalk vs. Frequency
0
RIN=60mVrms=0dB
VCC=10.5V
Crosstalk (dB)
–20
–40
Normal speed
–60
High speed
–80
–100
10
100
Rev.3, Jun. 1999, page 16 of 27
1k
10k
Frequency (Hz)
100k
1M
HA12207NT
PB-EQ→REC-EQ Mode Crosstalk vs. Frequency
0
PBOUT=100mVrms=0dB
VCC=10.5V
Crosstalk (dB)
–20
–40
High speed
–60
Normal speed
–80
–100
10
100
1k
10k
Frequency (Hz)
100k
1M
Ripple Rejection Ratio vs. Frequency (1)
PBOUT Ripple Rejection Ratio (dB)
0
Ain
VCC=10.5V
–20
High speed
–40
Normal speed
–60
–80
–100
10
100
1k
10k
Frequency (Hz)
100k
1M
Rev.3, Jun. 1999, page 17 of 27
HA12207NT
Ripple Rejection Ratio vs. Frequency (2)
0
VCC=10.5V
RECOUT Ripple Rejection Ratio (dB)
Normal speed
–10
High speed
–20
–30
–40
–50
10
100
1k
10k
Frequency (Hz)
100k
1M
PB-EQ Gain vs. Frequency
70
Ain=Vin=0.6mVrms
VCC=10.5V
PB-EQ Gain (dB)
60
50
40
Normal speed
High speed
30
20
10
Rev.3, Jun. 1999, page 18 of 27
100
1k
Frequency (Hz)
10k
100k
HA12207NT
PB-EQ Maximum Output Level vs. Supply Voltage
Maximum Output Level Vomax (Vrms)
4.5
100Hz (30kHz L.P.F.)
1kHz (400Hz H.P.F. + 30kHz L.P.F)
10kHz (400Hz H.P.F. + 80kHz L.P.F)
Normal speed
4.0
3.5
3.0
2.5
2.0
1.5
1.0
8
10
12
Supply Voltage (V)
16
14
Noise Voltage vs. Supply Voltage
80
Normal speed
DIN-AUDIO
70
Noise Voltage (µVrms)
High speed
60
Normal speed
50
40
CCIR/ARM
30
High speed
20
8
10
12
Supply Voltage (V)
14
16
Rev.3, Jun. 1999, page 19 of 27
HA12207NT
PB-EQ Total Harmonic Distortion vs. Output Level
Total Harmonic Distortion (%)
1.0
100Hz (30kHz L.P.F.)
1kHz (400Hz H.P.F. + 30kHz L.P.F)
10kHz (400Hz H.P.F. + 80kHz L.P.F)
Normal speed, VCC=10.5V
0.1
0.01
–20
–10
0
Output Level (dBs)
20
10
PB-EQ Crosstalk (Ain→Bin) vs. Frequency
0
Vin=+20dB=6mVrms
VCC=10.5V
Crosstalk (dB)
–20
–40
–60
Normal speed
–80
High speed
–100
10
100
Rev.3, Jun. 1999, page 20 of 27
1k
10k
Frequency (Hz)
100k
1M
HA12207NT
PB-EQ Crosstalk (Bin→Ain) vs. Frequency
0
Vin=+20dB=6mVrms
VCC=10.5V
Crosstalk (dB)
–20
–40
Normal speed
High speed
–60
–80
–100
10
100
1k
10k
Frequency (Hz)
100k
1M
PB-EQ Channel Separation (Lch→Rch) vs. Frequency
0
Channel Separation (dB)
–20
–40
Normal speed
–60
High speed
–80
–100
10
100
1k
10k
Frequency (Hz)
100k
1M
Rev.3, Jun. 1999, page 21 of 27
HA12207NT
PB-EQ Channel Separation (Rch→Lch) vs. Frequency
0
Channel Separation (dB)
–20
Normal speed
–40
High speed
–60
–80
–100
10
100
1k
10k
Frequency (Hz)
100k
1M
REC-EQ Gain vs. Frequency
40
VCC=10.5V
Vin=10mVrms
Normal speed
REC-EQ Gain (dB)
30
High speed
20
10
0
100
Rev.3, Jun. 1999, page 22 of 27
500
1k
5k
Frequency (Hz)
10k
50k
100k
HA12207NT
REC-EQ Maximum Output Level vs. Supply Voltage
Maximum Output Level Vomax (Vrms)
4.5
100Hz (30kHz L.P.F.)
1kHz (400Hz H.P.F. + 30kHz L.P.F)
10kHz (400Hz H.P.F. + 80kHz L.P.F)
Normal speed
4.0
3.5
3.0
2.5
2.0
1.5
1.0
8
10
12
Supply Voltage (V)
16
14
Signal to Noise Ratio vs. Supply Voltage
70
Vin=10mVrms
A-WTG
Signal to Noise Ratio S/N (dB)
65
High speed
60
Normal speed
55
50
45
40
8
10
12
Supply Voltage (V)
14
16
Rev.3, Jun. 1999, page 23 of 27
HA12207NT
REC-EQ Total Harmonic Distortion vs. Output Level
10
Total Harmonic Distortion (%)
100Hz (30kHz L.P.F.)
1kHz (400Hz H.P.F. + 30kHz L.P.F)
10kHz (400Hz H.P.F. + 80kHz L.P.F)
Normal speed, VCC=10.5V
1.0
0.1
0.01
–20
–10
0
Output Level (dBv)
20
10
REC-EQ Channel Separation (Lch→Rch) vs. Frequency
0
Channel Separation (dB)
–20
–40
Normal speed
–60
High speed
–80
–100
100
Rev.3, Jun. 1999, page 24 of 27
1k
10k
Frequency (Hz)
100k
1M
HA12207NT
Mute Attenuation vs. Frequency
0
Normal speed
VCC=10.5V
–40
–60
–80
–100
100
1k
10k
Frequency (Hz)
1M
100k
REC-RETURN SW Resistor vs. Input Level
200
175
REC-RETURN SW Resistor (Ω)
Mute Attenuation (dB)
–20
VCC=10.5V
R=
820
V
1020 – 1
R
150
125
R.Return Bin
4
5
+
100µ
1
V
2 CC
820Ω
100
V
Vin=775mVrms
75
50
f=100, 1k, 10kHz
25
–40
–30
–20
–10
Input Level (dBm)
0
10
Rev.3, Jun. 1999, page 25 of 27
HA12207NT
Package Dimensions
Unit: mm
19.2
20.32 Max
22
6.3
1
7.4 Max
12
11
1.0
1.78 ± 0.25
0.48 ± 0.10
0.51 Min
1.17 Max
2.90 Min 5.06 Max
0.89
7.62
+ 0.10
0.25 – 0.05
0˚ – 15˚
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
Rev.3, Jun. 1999, page 26 of 27
DP-22NS
—
Conforms
0.90 g
HA12207NT
Disclaimer
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
Sales Offices
Hitachi, Ltd.
Semiconductor & Integrated Circuits.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
URL
NorthAmerica
: http://semiconductor.hitachi.com/
Europe
: http://www.hitachi-eu.com/hel/ecg
Asia
: http://sicapac.hitachi-asia.com
Japan
: http://www.hitachi.co.jp/Sicd/indx.htm
For further information write to:
Hitachi Semiconductor
(America) Inc.
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
Hitachi Europe GmbH
Electronic Components Group
Dornacher Straße 3
D-85622 Feldkirchen, Munich
Germany
Tel: <49> (89) 9 9180-0
Fax: <49> (89) 9 29 30 00
Hitachi Europe Ltd.
Electronic Components Group.
Whitebrook Park
Lower Cookham Road
Maidenhead
Berkshire SL6 8YA, United Kingdom
Tel: <44> (1628) 585000
Fax: <44> (1628) 585160
Hitachi Asia Ltd.
Hitachi Tower
16 Collyer Quay #20-00,
Singapore 049318
Tel : <65>-538-6533/538-8577
Fax : <65>-538-6933/538-3877
URL : http://www.hitachi.com.sg
Hitachi Asia Ltd.
(Taipei Branch Office)
4/F, No. 167, Tun Hwa North Road,
Hung-Kuo Building,
Taipei (105), Taiwan
Tel : <886>-(2)-2718-3666
Fax : <886>-(2)-2718-8180
Telex : 23222 HAS-TP
URL : http://www.hitachi.com.tw
Hitachi Asia (Hong Kong) Ltd.
Group III (Electronic Components)
7/F., North Tower,
World Finance Centre,
Harbour City, Canton Road
Tsim Sha Tsui, Kowloon,
Hong Kong
Tel : <852>-(2)-735-9218
Fax : <852>-(2)-730-0281
URL : http://www.hitachi.com.hk
Copyright Hitachi, Ltd., 2000. All rights reserved. Printed in Japan.
Colophon 2.0
Rev.3, Jun. 1999, page 27 of 27