FUJITSU MB3793

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27402-2E
ASSP
POWER-VOLTAGE MONITORING
IC WITH WATCHDOG TIMER
MB3793-42/30
DESCRIPTION
The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog
timer.
8-PIN PLASTIC DIP
(DIP-8P-M01)
A reset signal is output when the power is cut or falls abruptly. When the power recovers
normally after resetting, a power-on reset signal is output to microprocessor units (MPUs).
An internal watchdog timer with two inputs for system operation diagnosis can provide a
fail-safe function for various application systems.
Two models with detection voltages of 4.2 and 3.0 V are available. There is also a mask
option that can detect voltages of 4.9 to 3.0 V in 0.1-V steps.
The model numbers are MB3793-42 or -30 corresponding to the detected voltage. The
model number and package code are as shown below.
Model No.
Package code
Detection voltage
MB3793-42
3793-A
4.2 V
MB3793-30
3793-N
3.0 V
8-PIN PLASTIC SOL
(FPT-8P-M02)
FEATURES
•
Precise detection of power voltage fall: ±2.5%
•
Detection voltage with hysteresis
•
Low power dispersion: ICC = 27 µA (reference)
•
Internal dual-input watchdog timer
•
Watchdog-timer halt function (by inhibition pin)
•
Independently-set watchdog and reset times
•
Mask option for detection voltage (4.9 to 3.0 V, 0.1-V steps)
This device contains circuitry to protect the inputs against
damage due to high static voltages or electric fields. However,
it is advised that normal precautions be taken to avoid
application of any voltage higher than maximum rated voltages
to this high impedance circuit.
1
MB3793-42/30
■
PIN ASSIGNMENT
(TOP VIEW)
RESET
1
8
CK1
CTW
2
7
CK2
CTP
3
6
INH
GND
4
5
VCC
(DIP-8P-M01)
(FPT-8P-M02)
■
2
PIN DESCRIPTION
Pin No.
Symbol
1
RESET
2
Description
Pin No.
Symbol
Description
Outputs reset
5
VCC
Power supply
CTW
Sets monitoring time
6
INH
Inhibits watchdog timer function
3
CTP
Sets power-on reset hold time
7
CK2
Inputs clock 2
4
GND
Ground
8
CK1
Inputs clock 1
MB3793-42/30
■
BLOCK DIAGRAM
(5) VCC
To VCC of all blocks
I1 ≈ 3µA
I2 ≈ 30µA
Q
CTP (3)
S
RSFF2
Output buffer
RESET
(1)
Q
R
+
Q
S
-
RSFF1
R1 ≈ 280 to
760 kΩ
Comp. O
Q
R
INH (6)
Comp. S
CTW(2)
Watchdog timer
Reference
voltage
generator
-
VS
+
Pulse generator 1
VREF ≈ 1.24 V
CK1 (8)
R1 ≈ 240 kΩ
Pulse generator 2
CK2 (7)
To GND of all blocks
(4) GND
3
MB3793-42/30
■
BLOCK FUNCTIONS
1. Comp. S
Comp. S is a comparator with hysteresis to compare the reference voltage with a voltage (VS) that is the result of dividing the power voltage
(VCC) by resistors 1 and 2. When VS falls below 1.24 V, a reset signal is output. This function enables the MB3793 to detect an abnormality
within 1 µs when the power is cut or falls abruptly.
2. Comp. O
Comp. O is a comparator to control the reset signal (RESET) output and compares the threshold voltage with the voltage at the CTP pin for
setting the power-on reset hold time. When the voltage at the CTP pin exceeds the threshold voltage, resetting is canceled.
3. Reset output buffer
Since the reset (RESET) output buffer has CMOS organization, no pull-up resistor is needed.
4. Pulse generator
The pulse generator generates pulses when the voltage at the CK1 and CK2 clock pins changes to High from Low level (positive-edge trigger)
and exceeds the threshold voltage; it sends the clock signal to the watchdog timer.
5. Watchdog timer
The watchdog timer can monitor two clock pulses. Short-circuit the CK1 and CK2 clock pins to monitor a single clock pulse.
6. Inhibition pin
The inhibition (INH) pin forces the watchdog timer on/off. When this pin is High level, the watchdog timer is stopped.
7. Flip-flop circuit
The flip-flop circuit RSFF1 controls charging and discharging of the power-on reset hold time setting capacity (CTP). The flip-flop circuit RSFF2
switches the charging accelerator for charging CTP during resetting on/off. This circuit only functions during resetting and does not function at
power-on reset.
4
MB3793-42/30
■
STANDARD CONNECTION
VCC
VCC
RESET
CTW
RESET
CTP
CTW
MB3793
CK1
VCC
RESET
VCC
Microprocessor 1
Microprocessor 2
CK
CK
CTP
GND
GND
CK2
INH
GND
Equation of time-setting capacitances (CTP and CTW) and set time
tPR (ms) ≈ A x CTP (µF)
tWD (ms) ≈ B x CTW (µF) + C x CTP (µF)
CTP
However, when —— ≤ about 10,
CTW
tWD (ms) ≈ B x CTW (µF)
tWR (ms) ≈ D x CTP (µF)
Values of A, B, C, and D
A
B
C
D
MB3793-42
Model No.
1300
1500
3
100
Remark
MB3793-30
750
1600
4
55
(Example) When CTP = 0.1 µF and CTW = 0.01 µF,
• MB3793-42
• MB3793-30
tPR ≈ 130 [ms]
tPR ≈ 75 [ms]
tWD ≈ 15 [ms]
tWD ≈ 16 [ms]
tWR ≈ 10 [ms]
tWR ≈ 5.5 [ms]
5
MB3793-42/30
■
TIMING CHART
1. Basic operation (Positive clock pulse)
VCC
VSH
VSL
VCCL
tCKW
CK1
CK2
INH
CTP
Vth
VH
CTW
VL
tPR
RESET
tPR
tWR
(1) (2)
6
tWD
(3)(4) (5)
(5)
(6) (7)
(8)
(9)
(10)
(11)
(12)
(13) (14)
MB3793-42/30
2. Basic operation (Negative clock pulse)
VSH
VSL
VCC
VCCL
tCKW
CK1
CK2
INH
Vth
CTP
VH
CTW
VL
tPR
RESET
tWD
tPR
tWR
(1) (2)
(3)(4) (5)
(5)
(6) (7)
(8)
(9)
(10)
(11)
(12)
(13) (14)
7
MB3793-42/30
3. Single-clock input monitoring (Positive clock pulse)
CK1
CK2
CTP Vth
VH
CTW
VL
RESET
8
tWR
MB3793-42/30
4. Inhibition operation (Positive clock pulse)
VSH
VCC VSL
VCCL
tCKW
CK1
CK2
INH
Vth
CTP
VH
CTW
VL
tPR
RESET
tWD
tPR
tWR
(1) (2)
(3)(4) (5)
(5)
(6) (7)
(8)
(9) (10)
(11)
(12)
(13) (14)
9
MB3793-42/30
5. Clock pulse input (Positive clock pulse)
a
CK1
b
CK2
VH
CTW
VL
The MB3793 watchdog timer monitors Clock 1 (CK1) and Clock 2 (CK2) pulses alternately. When a CK2 pulse
is detected after detecting a CK1 pulse, the monitoring time setting capacity (CTW) switches to charging from
discharging.
When two consecutive pulses occur on one side of this alternation before switching, the second pulse is ignored.
In the above figure, pulses a and b are ignored.
■
OPERATION SEQUENCE
The operation sequence is explained by using Timing Chart 1.
The following item numbers correspond to the numbers in Timing Chart 1.
(1) When the power voltage (VCC) reaches about 0.8 V (VCCL), a reset signal is output.
(2) When VCC exceeds the rising-edge detection voltage (VSH), charging of power-on reset hold time setting capacitance (CTP) is started.
VSH is about 4.3 V in the MB3793-42 and 3. 07 V in the MB3793-30.
(3) When the voltage at the CTP pin setting the power-on reset hold time exceeds the threshold voltage (Vth), resetting is canceled and
the voltage at the RESET pin changes to High level to start charging of the watchdog-timer monitoring time setting capacitance (CTW).
Vth is about 3.6 V in the MB3793-42 and 2.4 V in the MB3793-30.
The power-on reset hold time (tPR) can be calculated by the following equation.
tPR (ms) ≈ A x CTP (µF)
Where, A is about 1300 in the MB3793-42 and 750 in the MB3793-30.
(4) When the voltage at the CTW pin setting the monitoring time reaches High level (VH), CTW switches to discharging from charging. VH
is about 1.24 V (reference value) in both the MB3793-42 and MB3793-30.
(5) When clock pulses are input to the CK2 pin during CTW discharging after clock pulses are input to the CK1 pin—positive-edge trigger,
CTW switches to charging.
(6) If clock pulse input does not occur at either the CK1 or CK2 clock pins during the watchdog-timer monitoring time (tWD), the CTW voltage
falls below Low level (VL), a reset signal is output, and the voltage at the RESET pin changes to Low level. VL is about 0.24 V in both
the MB3793-42 and MB3793-30.
tWD can be calculated from the following equation.
tWD (ms) ≈ B x CTW (µF) + C x CTP (µF)
Where, B is about 1500 in the MB3793-42 and 1600 in the MB3793-30. C is about 3 in the MB3793-42 and 4 in the MB3793-30; it is
much smaller than B.
CTP
Hence, when —— ≤ 10, the calculation can be simplified as follows:
CTW
tWD (ms) ≈ B x CTW (µF)
10
MB3793-42/30
(7) When the voltage of the CTP pin exceeds Vth again as a result of recharging CTP, resetting is canceled and the watchdog timer restarts
monitoring.
The watchdog timer reset time (tWR) can be calculated by the following equation.
tWR (ms) ≈ D x CTP (µF)
Where, D is about 100 in the MB3793-42 and 55 in the MB3793-30.
(8) When VCC falls below the rising-edge detection voltage (VSL), the voltage of the CTP pin falls and a reset signal is output, and the
voltage at the RESET pin changes to Low level. VSL is about 4.2 V in the MB3793-42 and 3.0 V in the MB3793-30.
(9) When VCC exceeds VSH, CTP begins charging.
(10) When the voltage of the CTP pin exceeds Vth, resetting is canceled and the watchdog timer restarts.
(11) When an inhibition signal is input (INH pin is High level), the watchdog timer is halted forcibly.
In this case, VCC monitoring is continued ((8) - (9)) without the watchdog timer.
The watchdog timer does not function unless this inhibition input is canceled.
(12) When the inhibition input is canceled (INH pin is Low level), the watchdog timer restarts.
(13) When the VCC voltage falls below VSL after power-off, a reset signal is output.
Similar operation is also performed for negative clock-pulse input (Timing Chart 2).
Short-circuit the clock pins CK1 and CK2 to monitor a single clock. The basic operation is the same but the clock pulses are monitored at every
other pulse (Timing Chart 3).
■
ABSOLUTE MAXIMUM RATINGS
(Ta = +25°C)
Parameter
Power voltage*
Input voltage
Reset output voltage
(direct current)
Symbol
LImits
Symbo
VCC
-0.3 to +7
V
-0.3 to +7
V
CK1
VCK1
CK2
VCK2
INH
VINH
RESET
IOL
IOH
-10 to +10
mA
PD
200
mW
Tstg
-55 to +125
°C
Allowable loss (Ta ≤ +85°C)
Storage temperature
*The power voltage is based on the ground voltage (0 V).
Note: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be
restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
■
RECOMMENDED OPERATING CONDITIONS
Limits
Parameter
Symbol
Unit
Min.
Typical
Max.
Reset (RESET) output current
IOL
IOH
-5
-
+5
mA
Power-on reset hold time setting capacity
CTP
0.001
-
10
µF
Watchdog-timer monitoring time setting capacity
CTW
0.001
-
1
µF
Watchdog timer monitoring time
tWD
0.1
-
1500
ms
Operating ambient temperature
Ta
-40
-
+85
°C
Note: These recommended operation conditions guarantee normal logic operation of an LSI circuit. The limits of the AC and DC electrical
characteristics are guaranteed within these recommended conditions.
11
MB3793-42/30
■
ELECTRICAL CHARACTERISTICS
1. DC Characteristics
(VCC = +5 V (MB3793-42), VCC = +3.3 V (MB3793-30), Ta = +25°C)
Limits
Parameter
Symbol
Test Conditions
Unit
Min.
Typical
Max.
ICC1
Watchdog timer operation*
-
27
50
ICC2
Watchdog timer halt**
-
25
45
ICC1
Watchdog timer operation*
-
25
45
ICC2
Watchdog timer halt**
-
24
45
Ta = +25°C
4.10
4.20
4.30
VSL
VCC falling
Ta = -40 to +85°C
4.05
4.20
4.35
Ta = +25°C
4.20
4.30
4.40
Ta = -40 to +85°C
4.15
4.30
4.45
Ta = +25°C
2.90
3.00
3.10
Ta = -40 to +85°C
2.85
3.00
3.15
Ta = +25°C
2.97
3.07
3.17
Ta = -40 to +85°C
2.92
3.07
3.22
50
100
150
mV
30
70
110
mV
MB3793-42
Power current
MB3793-30
µA
µA
V
MB3793-42
VSH
VCC rising
Detection voltage
VSL
V
VCC falling
V
MB3793-30
VSH
Detection voltage
hysteresis difference
VCC rising
V
MB3793-42
VSHYS
VSH - VSL
MB3793-30
VthCH
-
(1.4)
1.9
(2.5)
V
VthCL
-
(0.8)
1.3
(1.8)
V
Clock-input hysteresis
VCHYS
-
(0.4)
0.6
(0.8)
V
Inhibition-input threshold voltage
VthIN
-
0.8
1.5
2.0
V
Clock-input threshold voltage
Input current
CK1
CK2
INH
IIH
VCK = VCC
-
0
1.0
µA
IIL
VCK = 0 V
-1.0
0
-
µA
VOH
IRESET = -5 mA
4.5
4.75
-
V
VOL
IRESET = +5 mA
-
0.12
0.4
V
VOH
IRESET = -3 mA
2.8
3.10
-
V
VOL
IRESET = +3 mA
-
0.12
0.4
V
VCCL
IRESET = +50 µA
-
0.8
1.2
V
MB3793-42
Reset output voltage
MB3793-30
Reset-output minimum power voltage
*At clock input pins CK1 and CK2, the pulse input frequency is 1 kHz and the pulse amplitude is 0 V to VCC.
**Inhibition input is at High level.
12
MB3793-42/30
2. AC Characteristics
(VCC = +5 V (MB3793-42), VCC = +3.3 V (MB3793-30), Ta = +25°C)
Parameter
Power-on reset hold time
Watchdog timer monitoring time
Watchdog timer reset time
Symbol
MB3793-42
tPR
MB3793-30
MB3793-42
tWD
MB3793-30
MB3793-42
tWR
MB3793-42
Clock (CK1, CK2) input pulse duration
Reset (RESET) output transition
time*
Limits
Test Conditions
Typical
Max.
80
130
180
ms
30
75
120
ms
7.5
15
22.5
ms
8
16
24
ms
5
10
15
ms
2.0
5.5
9
ms
500
-
-
ns
CTP = 0.1 µF
CTW = 0.01 µF
CTP = 0.1 µF
CTP = 0.1 µF
-
tCKW
Unit
Min.
Rising
tTLH
CL = 50pF
-
-
500
ns
Falling
tTHL
CL = 50pF
-
-
500
ns
*The voltage range is 10% to 90% at testing the reset output transition time.
■
WATCHDOG TIMER USE EXAMPLE
1. Monitoring Two Clocks
VCC
(5)
VCC
RESET (1)
(2) CTW
RESET
(3) CTP
MB3793
CK1 (8)
CTW
CTP
VCC
RESET
VCC
Microprocessor 1
Microprocessor 2
CK
CK
GND
GND
CK2 (7)
INH
(6)
GND
(4)
13
MB3793-42/30
2. Monitoring Single Clock
VCC
(5)
VCC
RESET (1)
(2) CTW
RESET
(3) CTP
CTW
VCC
Microprocessor
MB3793
CK1 (8)
CK
CTP
GND
CK2 (7)
INH
(6)
GND
(4)
3. Watchdog Timer Stopping
VCC
(5)
VCC
RESET (1)
(6) INH
(2) CTW
RESET
(3) CTP
CTW
Microprocessor 1
MB3793
CK1 (8)
CK
HALT
GND
CTP
CK2 (7)
GND
(4)
14
VCC
RESET
VCC
Microprocessor 2
CK
HALT
GND
MB3793-42/30
REFERENCE CHARACTERISTIC CURVES (FOR MB3793-42)
Power Current - Power Voltage
Detection Voltage - Ambient Temperature
40
4.5
Watchdog timer monitoring (VINH = 0 V)
Ta = -40 to +85°C
35
VSH (Ta = +25°C)
30
4.4
MAX
Detection voltage:
VSH and VSL (V)
Watchdog timer stopping (VINH = VCC)
ICC (µA)
Power current:
25
20
Reset (VCC < VSH)
Inhibited
15
10
MAX
4.3
TYP
VSH
TYP
4.2
MIN
VSL
MB3793-42
f = 1 kHz
VINH
Duty ≈ 10%
VCC
MIN
4.1
VL = 0 V
VH = VCC
VSL (Ta = +25°C)
CTW
CTP
0.01 µF
0.1 µF
Ta = -40 to +85°C
4.0
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10
-40
-20
0
20
40
60
80
100
Power voltage: VCC (V)
Ambient temperature: Ta (°C)
Reset Output Voltage - Reset Output Current
Reset Output Voltage - Reset Output Current
(P-MOS side)
(N-MOS side)
5.0
500
Ta = -40°C
4.9
Ta = +25°C
Reset output voltage:
VRESET (mV)
Reset output voltage:
VRESET (V)
■
4.8
4.7
4.6
400
Ta
VRESET
RON
-40°C
98 mV
19.6 Ω
+25°C
135 mV
27 Ω
+85°C
167 mV
33.4 Ω
IRESET
5 mA
Ta = +25°C
300
4.5
Ta = +85°C
Ta = +85°C
4.4
200
4.3
4.2
4.1
Ta
VRESET
RON
-40°C
4.800 V
40 Ω
+25°C
4.750 V
50 Ω
+85°C
4.707 V
58.6 Ω
IRESET
100
-5 mA
Ta = -40°C
4.0
0
0
-1
-2
-3
-4
-5
-6
-7
Reset output current: IRESET (mA)
-8
-9
-10
0
1
2
3
4
5
6
7
8
9
10
Reset output current: IRESET (mA)
15
MB3793-42/30
Reset-on Reset Time - Ambient Temperature
Reset Output Voltage - Power Voltage
(when VCC rising)
7
260
Pull-up resistance: 100 kΩ
240
6
Ta = -40 to +85°C
5
200
Ta = +25°C
180
4
Power-on reset time:
tPR (ms)
Reset output voltage:
VRESET (V)
220
3
Ta = +85°C
2
Ta = +25°C
MAX
160
140
TYP
120
100
1
80
Ta = -40°C
MIN
0
0
1
2
3
4
5
6
60
7
40
Power voltage: VCC (V)
20
0
-40
-20
0
20
40
60
80
100
Ambient temperature: Ta (°C)
Watchdog Timer Reset Time - Ambient Temperature
Watchdog Timer Monitoring Time - Ambient
(when monitoring)
26
Temperature
26
24
24
Ta = -40 to +85°C
Ta = -40 to +85°C
22
22
20
20
18
18
Ta = +25°C
Watchdog timer
monitoring time:
tWD (ms)
Watchdog timer reset time:
tWR (ms)
MAX
Ta = +25°C
16
MAX
14
12
16
TYP
14
12
TYP
10
10
MIN
8
8
6
6
MIN
4
4
2
2
0
-40
-20
0
20
40
60
80
Ambient temperature: Ta (°C)
16
100
0
-40
-20
0
20
40
60
Ambient temperature: Ta (°C)
80
100
MB3793-42/30
Power-on Reset Time - CTP Capacitance
Reset Time - CTP Capacitance
103
103
102
102
Reset Time:
tWR (ms)
Power-on reset time:
tPR (ms)
104
Ta = -40°C
1
10
Ta = -40°C
101
Ta = +25°C
1
1
Ta = +25°C
Ta = +85°C
Ta = +85°C
10-1
10-1
10-4
10-3
10-2
10-1
101
1
10-2
10-4
102
10-3
10-2
10-1
1
101
102
Power-on reset time setting capacitance: CTP (µF)
Power-on reset time setting capacitance: CTP (µF)
Watchdog-Timer Monitoring Time - CTW Capacitance
Watchdog-Timer Monitoring Time - CTW Capacitance
(under Ta condition)
104
103
103
Ta = -40°C
CTP = 1 µF
102
Watchdog-timer
monitoring time:
tWD (ms)
Watchdog-timer
monitoring time:
tWD (ms)
102
Ta = +25°C
10
1
Ta = +85°C
CTP = 0.1 µF
1
10
1
1
10-1
10-1
CTP = 0.01 µF
10-5
10-4
10-3
10-2
10-1
1
101
Watchdog-timer monitoring time setting capacitance: CTW (µF)
10-5
10-4
10-3
10-2
10-1
1
101
Watchdog-timer monitoring time setting capacitance: CTW (µF)
17
MB3793-42/30
■
PACKAGE DIMENSIONS
8-LEAD PLASTIC DUAL IN-LINE PACKAGE
+.016
.370 –.012
(9.40 +0.40 )
–0.30
INDEX
+.012
.039 – 0
(0.99 +0.30 )
–0
+.014
.035 –.012
+0.35
(0.89 –0.30 )
15°MAX
.244±.010
(6.20±0.25)
.300(7.62)
TYP
+.012
.060 –0
+0.30
(1.52 –0 )
.010±.002
(0.25±0.05)
.172(4.36)MAX
.020(0.51)
MIN
.100(2.54)
TYP
1991 FUJITSU LIMITED D08006S-2C
18
.118(3.00)MIN
.018±.003
(0.46±0.08)
Dimensions in
inches (millimeters)
MB3793-42/30
8-LEAD PLASTIC FLAT PACKAGE
(CASE No.: FPT-8P-M02)
+.010
.199–.008
.061±.008
(1.55±0.20)
+0.25
(5.05–0.20)
(MOUNTING HEIGHT)
.006±.004
(0.15±0.10)
.236±.016
(6.00±0.40)
45°
.154±.012
(3.90±0.30)
.016(0.40)
.017±.004
.050(1.27)
TYP
(0.42±0.10)
Ø.005(0.13)
M
(STAND OFF HEIGHT)
.197±.012
(5.00±0.30)
.020±.008
(0.50±0.20)
.008±.002
(0.20±0.05)
Details of “A” part
.016(0.40)
“A”
.008(0.20)
.004(0.10)
.150(3.81)
REF
1991 FUJITSU LIMITED F08004S-2C
.007(0.18)
MAX
.026(0.65)
MAX
Dimensions in
inches (millimeters)
19
MB3793-42/30
FUJITSU LIMITED
For further information please contact:
Japan
FUJITSU LIMITED
Corporate Global Business Support Division
Electronic Devices
KAWASAKI PLANT, 4-1-1, Kamikodanaka
Nakahara-ku, Kawasaki-shi
Kanagawa 211-88, Japan
Tel: (044) 754-3753
Fax: (044) 754-3329
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FUJITSU MICROELECTRONICS, INC.
Semiconductor Division
3545 North First Street
San Jose, CA 95134-1804, U.S.A.
Tel: (408) 922-9000
Fax: (408) 432-9044/9045
Europe
FUJITSU MIKROELEKTRONIK GmbH
Am Siebenstein 6-10
63303 Dreieich-Buchschlag
Germany
Tel: (06103) 690-0
Fax: (06103) 690-122
Asia Pacific
FUJITSU MICROELECTRONICS ASIA PTE. LIMITED
No. 51 Bras Basah Road,
Plaza By The Park,
#06-04 to #06-07
Singapore 189554
Tel: 336-1600
Fax: 336-1609
All Rights Reserved.
Circuit diagrams utilizing Fujitsu products are included as a
means of illustrating typical semiconductor applications. Complete information sufficient for construction purposes is not necessarily given.
The information contained in this document has been carefully
checked and is believed to be reliable. However, Fujitsu assumes no responsibility for inaccuracies.
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use with equipments which require extremely high reliability
such as aerospace equipments, undersea repeaters, nuclear control systems or medical equipments for life support.
F9603
 FUJITSU LIMITED Printed in Japan
20