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HA12134A, HA12135A, HA12136A
Dolby B-Type Noise Reduction System
ADE-207-016B (Z) 3rd Edition Jun. 1999 Description
The HA12134A, HA12135A, HA12136A are silicon monolithic bipolar IC series providing dual channel Dolby B-type noise reduction system* in one chip. The circuit is used primarily to reduce the level of background noise introduced during recording and playback of audio signals on magnetic tape. HA12134A series provide the following functions and features.
Functions
* Dual Dolby B-type NR processor * NR ON/OFF control switch. * Record (encode)/playback (decode) control switch.
Features
* Separate record/playback input and output. Unprocessed signal output available in the encode and decode modes. * Reduction of external components count. * Small capacitor value for the reference voltage. * NR ON/OFF switching and REC/PB switching are provided internally. * 2-type package (DP-16, FP-16DA) * Wide range of operating supply voltage.
*
Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
HA12134A, HA12135A, HA12136A
Ordering Information
Type No HA12134A HA12134AF HA12135A HA12135AF HA12136A HA12136AF 580 450 Dolby Level (mVrms) 300 Package DP-16 FP-16DA DP-16 FP-16DA DP-16 FP-16DA
Block Diagram
REC IN GND PB IN BIAS
18 k 22 k
REC/PB PB OUT
DET
REC OUT
0.22
16
15
14
13
12
11
10
9
SW BIAS SW
BUF AMP
SIDE CHAIN
BUF AMP
SIDE CHAIN
1
2
3
4
+ 1 + 22
5
22 k
6
7
0.22
8
REC IN
V CC
PB IN
V REF NR ON/OFF
PB OUT
DET
REC OUT
Rev.3, Jun. 1999, page 2 of 27
HA12134A, HA12135A, HA12136A
Absolute Maximum Ratings (Ta = 25C, Unless otherwise specified.)
Item Supply voltage Power dissipation Operating temperature Storage temperature Lead temperature Note: 1. Soldering 10 sec. Symbol Vccmax Pd Topr Tstg TI Rating 16 250 -40 to +85 -55 to +125 260 Unit V mW C C C Note 1 Ta 85C Note
Rev.3, Jun. 1999, page 3 of 27
HA12134A, HA12135A, HA12136A
Electrical Characteristics (Ta = 25C, VCC = 12 V, Unless otherwise specified.)
Item Symbol Min 6.5 8.0 9.5 IQ HA12134A GVIA HA12135A HA12136A NR encode boost V 8 (9) (NR ON) V 8 (9) (NR OFF) -- 21.0 24.5 26.5 ENC-1.4 2.9 k (1) ENC-1.4 6.0 k (2) ENC-5 k 1.7 (1) ENC-5 k 6.7 (2) ENC-10 k (1) ENC-10 k (2) T.H.D (REC) Signal handling T.H.D (REC) HA12134A Vomax HA12135A (REC) HA12136A Signal/noise ratio (REC) Crosstalk (ENC) (Pin 8 - Pin 9) Control voltage for REC/PB S/N (REC) 62.0 68.0 -- dB Rg = 5.1 k weighted CCIR/ARM f = 1 kHz NR OFF
REC/PB 22 k 12 Measure
Typ 12.0 12.0 12.0 7 23.0 26.5 28.5 4.4 7.5 3.2 8.2 0.4 10.4 0.05 13.0
Max 16.0 16.0 16.0 -- 25.0 28.5 30.5 5.9 9.0 4.7 9.7 1.9 11.8 0.3 --
Unit V
Test conditions Enable functional operations
Operating voltage HA12134A Vope HA12135A HA12136A Quiescent current Voltage gain of input amp
mA dB
No signal, REC NR-ON Pin 1Pin 6 (Pin 16Pin 11) Vout = 0 dB, f = 1 kHz
dB dB dB dB dB dB % dB
f = 1.4 kHz V 8 (9) (NR OFF) = -20 dB f = 1.4 kHz V 8 (9) (NR OFF) = -30 dB f = 5 kHz V 8 (9) (NR OFF) = -20 dB f = 5 kHz V 8 (9) (NR OFF) = -30 dB f = 10 kHz V 8 (9) (NR OFF) = 0 dB f = 10 kHz V 8 (9) (NR OFF) = -40 dB f = 1 kHz V 8 (9) (NR ON) = 0 dB f = 1 kHz, T.H.D = 1% VCC = 6.5 V VCC = 8.0 V VCC = 9.5 V
-1.1 9.8 -- 12.0
CT RL 52.0 LR REC 2.5
60.0 --
-- VCC
dB V
PB Control voltage for NR ON/OFF ON
0.0 2.5
-- --
0.5 VCC V
NR Measure ON/OFF 5 22k
OFF Channel balance GVIA
0.0 -1.0
-- 0.0
0.5 1.0 dB
Rev.3, Jun. 1999, page 4 of 27
HA12134A, HA12135A, HA12136A
Electrical Characteristics (Ta = 25C, VCC = 12 V, Unless otherwise specified.) (cont)
Item Offset voltage V 8 (9) (NR-ON) - V 8 (9) (NR-OFF) Symbol Vorec Min -50 Typ 0.0 Max 50 Unit mV Test conditions REC mode VCC = 16.0 V
Test Circuit
R10 10k SW9 P R R11 5.1k SW1 OFF ON
To Vcc C11 + 0.68 C12 + 1 16 REC IN 15 GND 14 PB IN R9 18k 13 BIAS 12 REC/ PB SW8 REC PB R8 22k 11 PB OUT 10 DET C10 0.22 9 REC OUT C9 + 10 C8 + 10
R7 10k P R SW7
AC VOLT METER HP 400E or EQUIVALENT
R6 10k
L SW2 R R1 5.1k REC IN C1 + 1 Vcc 2 PB IN 3 NR PB VREF ON/OFF OUT 6 4 5 C13 C4 + + R3 1 22 22k ON OFF ON SW10 DC POWER SOURCE SW4 OFF DET 7 REC OUT
SW6
DISTORTION ANALYZER HP339A or EQUIVALENT OSCILLOSCOPE TEKTRO 475 or EQUIVALENT
AUDIO SG HP339A or EQUIVALENT
SW3 R2 10k
1 R P C2 + 0.68
C3 + 100
C7 R5 8+ C5 10 R 0.22 C6 P SW5 + 10 R4 10k
NOISE METER WITH CCIR/ ARM FILTER
Notes: 1. Resistor tolerances are 1% 2. Capacitor tolerances are 1% 3. Unit R: C: F
Rev.3, Jun. 1999, page 5 of 27
HA12134A, HA12135A, HA12136A
Pin Description (Ta = 25C, VCC = 12 V, No signal, The value in the table show typical value.)
Pin No. Symbol 1, 16 REC IN R (in) 56 k VDC 6.0 V Equivalent circuit
VCC
Description Recording (encode) input
56k VCC /2 GND
2 3, 14
VCC PB IN
--
12.0 V VCC
Power supply Playback (decode) input
100 k 6.0 V
100k VCC /2 GND 4 5 VREF -- 6.0 V -- Reference voltage
NR ON/OFF --
VCC
1k
Mode control pin for NR ON/OFF "H"NR ON "L"NR OFF
3 VBE 4 V BE 100k GND
6, 11
PB OUT
--
6.0 V
VCC
Playback (decode) output
100 100
GND
Rev.3, Jun. 1999, page 6 of 27
HA12134A, HA12135A, HA12136A
Pin Description (Ta = 25C, VCC = 12 V, No signal, The value in the table show typical value.) (cont)
Pin No. Symbol 7, 10 DET R (in) -- VDC 1.3 V Equivalent circuit
VCC
Description Time constant pin for the level detector
GND
8, 9
REC OUT
--
6.0 V
VCC
Recording (encode) output
100 100
GND
12
REC/PB
--
--
VCC
1k
Mode control pin for REC/PB (encode/decode) "H" REC (encode) "L" PB (decode)
3 VBE 4 VBE 100k GND
13
BIAS
--
1.0 V
VCC
Reference current input pin for the active filters
GND
15
GND
--
0V
--
Ground
Rev.3, Jun. 1999, page 7 of 27
HA12134A, HA12135A, HA12136A
10 No Signal 8
NR-ON
NR-OFF
HA12134A/5A/6A
Quiescent current I Q [mA]
6
4
2
0
4
6
8
10
12
14
16
18
Supply voltage Vcc [V]
Figure 1 Quiescent Current vs. Supply Voltage
3.0 HA12134A/5A/6A
Control voltage (REC/PB) [V]
2.5
REC Mode
2.0
1.5
1.0
PB Mode
0.5 0 4 6 8 10 12 14 16 18 Supply voltage Vcc [V]
Figure 2 REC/PB Control Voltage vs. Supply Voltage
Rev.3, Jun. 1999, page 8 of 27
HA12134A, HA12135A, HA12136A
3.0 HA12134A/5A/6A
Control voltage (NR-ON/OFF) [V]
2.5
2.0
NR-ON
1.5
1.0 0.5 0 4 6 8
NR-OFF
10
12
14
16
18
Supply voltage Vcc [V]
Figure 3 NR-ON/OFF Control Voltage vs. Supply Voltage
12 10
HA12136A
12 V
16 V -40 dB 9.5 V
Encode boost [dB]
8 -30 dB 6
4 -20 dB 2 -10 dB 0 100 200 0 dB 500 1k 2k 5k 10 k 20 k 50 k 100 k
Frequency [Hz]
Figure 4 Encode Boost vs. Frequency
Rev.3, Jun. 1999, page 9 of 27
HA12134A, HA12135A, HA12136A
HA12136A
30
PB Out NR-ON/OFF
Output gain Gv [dB]
20
10
REC Out NR-OFF
0 100 300 600 1 k 3k 6 k 10 k 30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 5 REC Mode Output Gain vs. Frequency
HA12136A
30
Output gain Gv [dB]
REC Out NR-ON PB Out NR-OFF
20
10
REC Out NR-OFF
0 100 300 600 1 k 3k 6 k 10 k 30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 6 PB Mode Output Gain vs. Frequency
Rev.3, Jun. 1999, page 10 of 27
HA12134A, HA12135A, HA12136A
HA12136A
0
Ripple rejection ratio R.R.R. [dB]
-10
-20
NR-ON
-30
NR-OFF
-40
100
200
400
1k
2k
4k
6k
10 k
20 k
Frequency [Hz]
Figure 7 REC Mode Ripple Rejection Ratio vs. Frequency
HA12136A
-10
Ripple rejection ratio R.R.R. [dB]
-20
-30
NR-OFF
-40
NR-ON
-50
100
200
400
1k
2k
4k
10 k
20 k
Frequency [Hz]
Figure 8 PB Mode Ripple Rejection Ratio vs. Frequency
Rev.3, Jun. 1999, page 11 of 27
HA12134A, HA12135A, HA12136A
10 HA12136A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 10 kHz 0.03 0.01 -25 1 kHz 100 Hz
-20
-15
-10
-5
0
5
10
15
20
V out [dB]
Figure 9 REC NR-OFF Total Harmonic Distortion vs. Output Level
10
HA12136A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 10 kHz 0.1 1 kHz 100 Hz 0.03 0.01 -25
-20
-15
-10
-5
0
5
10
15
20
V out [dB]
Figure 10 REC NR-ON Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 12 of 27
HA12134A, HA12135A, HA12136A
10 HA12136A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 100 Hz 10 kHz 0.03 0.01 -25 1 kHz
-20
-15
-10
-5
0
5
10
15
20
V out [dB]
Figure 11 PB NR-OFF Total Harmonic Distortion vs. Output Level
10
HA12136A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 100 Hz 0.03 0.01 -30 -25 -20 1 kHz -15 -10 -5 0 10 kHz
5
10
15
20
V out [dB]
Figure 12 PB NR-ON Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 13 of 27
HA12134A, HA12135A, HA12136A
20 19
Maximum output level Vomax [dB]
HA12136A PB NR-ON
18 17 16 15 14 13 12 11 10 8 9 10 11
REC NR-OFF PB NR-OFF REC NR-ON
12
13
14
15
16
Supply voltage V CC [V]
Figure 13 Maximum Output Level vs. Supply Voltage
90 HA12136A 85 80 REC NR-OFF PB NR-OFF REC NR-ON PB NR-ON
S/N [dB]
75 70 65 60 55 8 10
12
14
16
18
Supply voltage V CC [V]
Figure 14 REC/PB Signal To Noise Ratio vs. Supply Voltage
Rev.3, Jun. 1999, page 14 of 27
HA12134A, HA12135A, HA12136A
12 10 HA12135A 12 V 16 V -40 dB 8.0 V
Encode boost [dB]
8 -30 dB 6
4 -20 dB 2 -10 dB 0 100 200 0 dB 500 1k 2k 5k 10 k 20 k 50 k 100 k
Frequency [Hz]
Figure 15 Encode Boost vs. Frequency
HA12135A
30
PB Out NR-ON/OFF
Output gain Gv [dB]
20
10
REC Out NR-OFF
0 100 300 600 1 k 3k 6 k 10 k 30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 16 REC Mode Output Gain vs. Frequency
Rev.3, Jun. 1999, page 15 of 27
HA12134A, HA12135A, HA12136A
HA12135A
30
Output gain Gv [dB]
REC Out NR-ON PB-Out NR-OFF
20
10
REC Out NR-OFF
0 100 300 600 1 k 3k 6 k 10 k 30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 17 PB Mode Output Gain vs. Frequency
HA12135A
-10
Ripple rejection ratio R.R.R. [dB]
-20
NR-ON
-30
NR-OFF
-40
-50
100
200
400
1k
2k
4k
10 k
20 k
Frequency [Hz]
Figure 18 REC Mode Ripple Rejection Ratio vs. Frequency
Rev.3, Jun. 1999, page 16 of 27
HA12134A, HA12135A, HA12136A
HA12135A
-10
Ripple rejection ratio R.R.R. [dB]
-20
-30
-40
NR-OFF
-50
NR-ON
200 400 1k 2k 4k 10 k 20 k
100
Frequency [Hz]
Figure 19 PB Mode Ripple Rejection Ratio vs. Frequency
10
HA12135A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 10 kHz 0.03 1 kHz 0.01 -20 -15 -10 -5 0 V out [dB] 5 10 15 20 100 Hz
Figure 20 REC NR-OFF Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 17 of 27
HA12134A, HA12135A, HA12136A
10 HA12135A
3 1.0
T.H.D. [%]
V CC = 12 V
0.3 10 kHz 0.1 1 kHz 100 Hz 0.03 0.01 -20
-15
-10
-5
0 V out [dB]
5
10
15
20
Figure 21 REC NR-ON total Harmonic Distortion vs. Output Level
10
HA12135A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 100 Hz 10 kHz 0.03 1 kHz
0.01 -20
-15
-10
-5
0 V out [dB]
5
10
15
20
Figure 22 PB NR-OFF Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 18 of 27
HA12134A, HA12135A, HA12136A
10 HA12135A
3 1.0
T.H.D. [%]
VCC = 12 V
0.3 0.1 100 Hz 0.03 1 kHz 0.01 -20 -15 -10 -5 0 V out [dB] 5 10 15 20 10 kHz
Figure 23 PB NR-ON Total Harmonic Distortion vs. Output Level
22 HA12135A PB NR-ON
Maximum output level Vomax [dB]
20
18
REC NR-OFF PB NR-OFF REC NR-ON
16
14 12
10 7 8 9 10 11 12 13 14 15 16 Supply voltage V CC [V]
Figure 24 Maximum Output Level vs. Supply Voltage
Rev.3, Jun. 1999, page 19 of 27
HA12134A, HA12135A, HA12136A
90 HA12135A 85 80 REC NR-OFF PB NR-OFF REC NR-ON PB NR-ON
S/N [dB]
75 70 65 60 55 6 8 10
12
14
16
18
Supply voltage V CC [V]
Figure 25 REC/PB Signal to Noise Ratio vs. Supply Voltage
12 10
HA12134A
16 V 12 V -40 dB 6.5 V
Encode boost [dB]
8 -30 dB 6
4 -20 dB 2 0 100 200 -10 dB 0 dB 500 1k 2k 5k 10 k 20 k 50 k 100 k
Frequency [Hz]
Figure 26 Encode Boost vs. Frequency
Rev.3, Jun. 1999, page 20 of 27
HA12134A, HA12135A, HA12136A
HA12134A
30
PB Out NR-ON/OFF
Output gain Gv [dB]
20
10
REC Out NR-OFF
0 100 300 600 1 k 3k 6 k 10 k 30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 27 REC Mode Output Gain vs. Frequency
HA12134A
30
Output gain Gv [dB]
REC Out NR-ON
20
PB Out NR-OFF
10
0
REC Out NR-OFF
100
300 600 1 k
3k
6 k 10 k
30 k 60 k 100 k 300 k 600 k 1 M
Frequency [Hz]
Figure 28 PB Mode Output Gain vs. Frequency
Rev.3, Jun. 1999, page 21 of 27
HA12134A, HA12135A, HA12136A
HA12134A
-10
Ripple rejection ratio R.R.R. [dB]
-20
NR-ON
-30
-40
NR-OFF
-50
100
200
400
1k
2k
4k
10 k
20 k
Frequency [Hz]
Figure 29 REC Mode Ripple Rejection Ratio vs. Frequency
HA12134A
-10
Ripple rejection ratio R.R.R. [dB]
-20
-30
NR-OFF
-40
NR-ON
-50
100
200
400
1k
2k
4k
10 k
20 k
Frequency [Hz]
Figure 30 PB Mode Ripple Rejection Ratio vs. Frequency
Rev.3, Jun. 1999, page 22 of 27
HA12134A, HA12135A, HA12136A
10 HA12134A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1
10 kHz
0.03 1 kHz 0.01 -20 -15 -10 -5 0
100 Hz
5
10
15
20
25
V out [dB]
Figure 31 REC NR-OFF Total Harmonic Distortion vs. Output Level
10
HA12134A
3 1.0
T.H.D. [%]
V CC = 12 V
0.3 0.1 10 kHz 100 Hz 1 kHz
0.03
0.01 -20
-15
-10
-5
0
5
10
15
20
25
V out [dB]
Figure 32 REC NR-ON Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 23 of 27
HA12134A, HA12135A, HA12136A
10 HA12134A
3 1.0 VCC = 12 V
T.H.D. [%]
0.3 0.1 100 Hz 0.03 0.01 -20 1 kHz 10 kHz
-15
-10
-5
0
5
10
15
20
25
V out [dB]
Figure 33 PB NR-OFF Total Harmonic Distortion vs. Output Level
10
HA12134A
3 1.0 V CC = 12 V
T.H.D. [%]
0.3 0.1 100 Hz 0.03 1 kHz 0.01 -20 -15 -10 -5 0 5 10 kHz 10 15 20 25
V out [dB]
Figure 34 PB NR-ON Total Harmonic Distortion vs. Output Level
Rev.3, Jun. 1999, page 24 of 27
HA12134A, HA12135A, HA12136A
26 HA12134A
Maximum output level Vomax [dB]
24 22 20 18 16 14 12 5 6 7 8 9
PB NR-ON
REC NR-OFF, PB NR-OFF REC NR-ON
10
11
12
13
14
15
16
Supply voltage V CC [V]
Figure 35 Maximum Output Level vs. Supply Voltage
90 HA12134A 85 PB NR-ON 80 REC NR-OFF
S/N [dB]
75 PB NR-OFF 70 REC NR-ON 65 60 55 4 6 8 10 12 14 16 18 Supply voltage V CC [V]
Figure 36 REC/PB Signal To Noise Ratio vs. Supply Voltage
Rev.3, Jun. 1999, page 25 of 27
HA12134A, HA12135A, HA12136A
Package Dimesnsions
Unit: mm
19.20 20.00 Max 16 9
1 1.3
1.11 Max
8
7.40 Max
6.30
0.51 Min
2.54 Min 5.06 Max
7.62
2.54 0.25
0.48 0.10
0.25 - 0.05 0 - 15
Hitachi Code JEDEC EIAJ Weight (reference value)
+ 0.13
DP-16 Conforms Conforms 1.07 g
Unit: mm
10.06 10.5 Max 16 9
1
*0.22 0.05 0.20 0.04
8
0.80 Max
5.5
0.20 7.80 + 0.30 -
2.20 Max
1.15
1.27
0.10 0.10
0 - 8
0.70 0.20
*0.42 0.08 0.40 0.06
0.15
0.12 M
Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA -- Conforms 0.24 g
*Dimension including the plating thickness Base material dimension
Rev.3, Jun. 1999, page 26 of 27
HA12134A, HA12135A, HA12136A
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
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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 Strae 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) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 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 Telex: 40815 HITEC HX
Copyright ' Hitachi, Ltd., 1998. All rights reserved. Printed in Japan.
Rev.3, Jun. 1999, page 27 of 27

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