FUJITSU MB3793-37PF

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27403-2E
ASSP For Power Supply Applications
BIPOLAR
Power Voltage Monitoring IC
with Watchdog Timer
MB3793-37A
■ DESCRIPTION
The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog timer.
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 fall-safe function for various applicaiton systems.
There is also a mask option that can detect voltages of 4.9 to 2.4 V in 0.1-V steps.
The model number is MB3793-37A corresponding to the detected voltage. The model number and package code
are as shown below.
Model No.
Package code
Detection voltage
MB3793-37A
3793AF
3.7 V
■ FEATURES
•
•
•
•
•
•
Precise detection of power voltage fall: ±2.5%
Detection voltage with hysteresis
Low power dispersion: ICC = 30 µA (reference)
Internal dual-input watchdog timer
Watchdog-timer halt function (by inhibition pin)
Independently-set wacthdog and reset times
■ PACKAGE
8-pin, Plastic SOP
8-pin, Plastic SOL
(FPT-8P-M01)
(FPT-8P-M02)
MB3793-37A
■ PIN ASSIGNMENT
(Top view)
RESET
1
8
CK1
CTW
2
7
CK2
CTP
3
6
INH
GND
4
5
VCC
(FPT-8P-M01)
(FPT-8P-M02)
■ PIN DESCRIPTION
2
Pin no.
Symbol
1
RESET
2
Descriptions
Pin no.
Symbol
Descriptions
Outputs reset pin
5
VCC
Power supply pin
CTW
Watchdog timer monitor time
setting pin
6
INH
Inhibit pin
3
CTP
Power-on reset hold time
setting pin
7
CK2
Inputs clock 2 pin
4
GND
Ground pin
8
CK1
Inputs clock 1 pin
MB3793-37A
■ BLOCK DIAGRAM
To VCC of all blocks
. 3 µA
I1 =
.
5 VCC
I2 .=. 30 µA
CTP 3
.
R1 =
.
494 kΩ
Logic circuit
RESET 1
Output circuit
INH 6
Comp.S
CTW 2
Watchdog
timer
Reference
voltage
generator
−
VS
+
Pulse generator 1
. 1.24 V
VREF =
.
CK1 8
R2 .=.
240 kΩ
Pulse generator 2
CK2 7
To GND of
all blocks
4 GND
3
MB3793-37A
■ BLOCK DESCRIPTION
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 ans abnomality within 1 µs when the power is cut or falls abruptly.
2. Output circuit
The output circuit contains a RESET output control comparator that compares the voltage at the CTP pin to the
threshold voltage to release the RESET output if the CTP pin voltage exceeds the threshold value.
Since the reset (RESET) output buffer has CMOS organization, no pull-up resistor is needed.
3. 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.
4. Watchdog timer
The watchdog timer can monitor two clock pulses. Short-circuit the CK1 and CK2 clock pins to monitor a single
clock pulse.
5. Inhibition pin
The inhibition (INH) pin forces the watchdog timer on/off. When this pin is High level, the watchdog timer is stopped.
6. Logic circuit
The logic circuit contains flip-flops.
Flip-flop RSFF1 controls the charging and discharging of the power-on reset time setting capacitor (CTP).
Flip-flop RSFF2 turns on/off the circuit that accelerates charging of the power-on reset time setting capacitor
(CTP) at a reset. The RSFF2 operates only at a reset; it does not operate at a power-on reset when the power is
turned on.
4
MB3793-37A
■ ABSOLUTE MAXIMUM RATINGS
(Ta = +25°C)
Parameter
Symbol
Conditions
VCC
—
CK1
VCK1
—
CK2
VCK2
—
INH
IINH
—
RESET
IOL
IOH
Power supply voltage*
Input voltage
Reset output current
Allowable loss
Storage temperature
Rating
Unit
Min.
Max.
–0.3
+7
V
–0.3
+7
V
—
–10
+10
mA
PD
Ta ≤ +85°C
—
200
mW
Tstg
—
–55
+125
°C
* : The power supply voltage is based on the ground voltage (0 V).
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
■ RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Conditions
Power supply voltage
VCC
Reset (RESET) output current
Value
Unit
Min.
Typ.
Max.
—
1.2
—
6.0
V
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
Operating temperature
Ta
—
–40
—
+85
°C
* : The watchdog timer monitor time range depends on the rating of the setting capacitor.
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device's electrical characteristics are warranted when the device is
operated within these ranges.
Always use semiconductor devices within their recommended operating condition ranges. Operation
outside these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representatives beforehand.
5
MB3793-37A
■ ELECTRICAL CHARACTERISTICS
1. DC Characteristics
(VCC = +5 V, Ta = +25°C)
Parameter
Symbol
Power supply current
ICC1
After exit from reset
VSL
VCC falling
VSH
VCC rising
Detection voltage
Detection voltage hysteresis
difference
Clock-input threshold voltage
Clock-input hysteresis
Inhibition-input voltage
Input current
(CK1, CK2, INH)
Reset output voltage
Reset-output minimum
power voltage
Value
Conditions
Ta = +25°C
Ta = –40°C to +85°C
Ta = +25°C
Ta = –40°C to +85°C
Min.
Typ.
Max.
—
30
50
3.60
3.70
3.80
(3.55)*
3.70
(3.85)*
3.69
3.79
3.89
(3.64)*
3.79
(3.94)*
Unit
µA
V
V
VSHYS
VSH – VSL
40
85
130
mV
VCIH
CK rising
(1.4)*
1.9
2.5
V
VCIL
CK falling
0.8
1.3
(1.8)*
V
V
VCHTS
—
(0.4)*
0.6
(0.8)*
VIIH
—
3.5
—
—
VIIL
—
—
0
0.8
V
IIH
VCK = 5 V
—
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
VCCL
IRESET = +50 µA
—
0.8
1.2
V
* : The values enclosed in parentheses ( ) are setting assurance values.
2. AC Characteristics
(VCC = +5 V, Ta = +25°C)
Parameter
Symbol
Conditions
Value
Min.
Max.
130
180
ms
—
—
µs
Power-on reset hold time
tPR
CTP = 0.1 µF
VCC input pulse width
tPI
CTP = 0.1 µF
(110)*
VCC delay time
tPD
CTP = 0.1 µF
—
20
(100)*2
µs
Watchdog timer reset time
tWD
CTW = 0.01 µF,
CTP = 0.1 µF
7.5
15
22.5
ms
Watchdog timer reset time
tWR
CTP = 0.1 µF
5
10
15
ms
Clock input pulse width
tCKW
—
500
—
—
ns
Clock input pulse cycle
tCKT
—
20
—
—
µs
Reset (RESET) output transition
time*1
80
2
Rising
tr*1
CL = 50 pF
—
—
500
ns
Falling
tf*2
CL = 50 pF
—
—
500
ns
*1:The voltage range is 10% to 90% at testing the reset output transition time.
*2:The values enclosed in parentheses ( ) are setting assurance values.
6
Unit
Typ.
MB3793-37A
■ DIAGRAM
1. Basic operation (Positive clock pulse)
VSH
VSL
VCC
tCKW
CK1
tCKT
CK2
INH
Vth
CTP
VH
CTW
VL
RESET
tWD
tPR
(1) (2)
(3)
(4)(5) (5)
tPR
tWR
(6) (7)
(8) (9)
(10)
(11)
(12)
(13)
7
MB3793-37A
2. Basic operation (Negative clock pulse)
VSH
VSL
VCC
tCKW
CK1
tCKT
CK2
INH
Vth
CTP
VH
CTW
VL
RESET
tPR
(1) (2)
8
tWD
(3)
(4)(5) (5)
tPR
tWR
(6) (7)
(8) (9)
(10)
(11)
(12)
(13)
MB3793-37A
3. Single-clock input monitoring (Positive clock pulse)
tCKW
CK1
CK2
tCKT
Vth
CTP
VH
CTW
VL
RESET
Note:
tWD
tWR
The MB3793 can monitor only one clock.
The MB3793 checks the clock signal at every other input pulse. Therefore, set watchdog timer
monitor time tWD to the time that allows the MB3793 to monitor the period twice as long as the input
clock pulse.
9
MB3793-37A
4. Inhibition operation (Positive clock pulse)
VSH
VSL
VCC
tCKW
CK1
CK2
INH
Vth
CTP
VH
CTW
VL
RESET
tPR
(1) (2)
10
tWD
(3)
(4)(5) (5)
tPR
tWR
(6) (7)
(11) (8) (9)
(10)
(12)
(13)
MB3793-37A
5. Clock pulse input supplementation (Positive clock pulse)
*1
CK1
*2
CK2
VH
CTW
VL
Note:
The MB3793 watchdog timer monitors Clock1 (CK1) and Clock2 (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, pulse *1 and *2 are ignored.
■ OPERATION SEQUENCE
1. Positive clock pulse input
See “1. Basic operation (positive clock pulse)” under “■ DIAGRAM.”
2. Negative clock pulse input
See “2. Basic operation (negative clock pulse)” under “■ DIAGRAM.”
The MB3793 operates in the same way whether it inputs positive or negative pulses.
3. Clock monitoring
To use the MB3793 while monitoring only one clock, connect clock pins CK1 and CK2.
Although the MB3793 operates basically in the same way as when monitoring two clocks, it monitors the clock
signal at every other input pulse.
See “3. Single-clock input monitoring (positive clock pulse)” under “■ DIAGRAM.”
4. Description of Operations
The numbers given to the following items correspond to numbers (1) to (13) used in “■ DIAGRAM.”
(1) The MB3793 outputs a reset signal when the supply voltage (VCC) reaches about 0.8 V (VCCL)
(2) If VCC reaches or exceeds the rise-time detected voltage VSH, the MB3793 starts charging the power-on
reset hold time setting capacitor CTP. At this time, the output remains in a reset state. The VSH value is about
3.79 V.
(3) When CTP has been charged for a certain period of time TPR (until the CTP pin voltage exceeds the threshold
voltage (Vth) after the start of charging), the MB3793 cancels the reset (setting the RESET pin to “H” level
from “L” level).
11
MB3793-37A
The Vth value is about 3.6 V with VCC = 5.0 V
The power-on reset hold timer monitor time tPR is set with the following equation:
tPR (ms) .=. A × CTP (µF)
The value of A is about 1300 with VCC = 5.0 V. The MB3793 also starts charging the watchdog timer monitor
time setting capacitor (CTW).
(4) When the voltage at the watchdog timer monitor time setting pin CTW reaches the “H” level threshold voltage
VH, the CTW switches from the charge state to the discharge state.
The value of VH is always about 1.24 V regardless of the detected voltage.
(5) If the CK2 pin inputs a clock pulse (positive edge trigger) when the CTW is being discharged in the CK1-CK2
order or simultaneously, the CTW switches from the discharge state to the charge state.
The MB3793 repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses with the system
logic circuit operating normally.
(6) If no clock pulse is fed to the CK1 or CK2 pin within the watchdog timer monitor time tWD due to some problem
with the system logic circuit, the CTW pin is set to the “L” level threshold voltage VL or less and the MB3793
outputs a reset signal (setting the RESET pin to “L” level from “H” level).
The value of VL is always about 0.24 V regardless of the detected voltage.
The watchdog timer monitor time tWD is set with the following equation:
tWD (ms) .=. B × CTW (µF)
The value of B is hardly affected by the supply voltage; it is about 1500 with VCC = 5.0 V.
(7) When a certain period of time tWR has passed (until the CTP pin voltage reaches or exceeds Vth again after
recharging the CTP), the MB3793 cancels the reset signal and starts operating the watchdog timer.
The watchdog timer monitor reset time tWR is set with the following equation:
tWR (ms) .=. D x CTP (µF)
The value of D is about 100 with VCC = 5.0 V.
The MB3793 repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses. If no clock
pulse is input, the MB3793 repeats operations (6) and (7).
(8) If VCC is lowered to the fall-time detected voltage (VSL) or less, the CTP pin voltage decreases and the
MB3793 outputs a reset signal (setting the RESET pin to “L” level from “H” level).
The value of VSL is 3.7 V
(9) When VCC reaches or exceeds VSH again, the MB3793 starts charging the CTP.
(10) When the CTP pin voltage reaches or exceeds Vth, the MB3793 cancels the reset and restarts operating
the watchdog timer. It repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses.
(11) Making the inhibit pin active (setting the INH pin to “H” from “L”) forces the watchdog timer to stop operation.
This stops only the watchdog timer, leaving the MB3793 monitoring VCC (operations (8) to (10)).
The watchdog timer remains inactive unless the inhibit input is canceled.
(12) Canceling the inhibit input (setting the INH pin to “L” from “H”) restarts the watchdog timer.
(13) The reset signal is output when the power supply is turned off to set VCC to VSL or less.
12
MB3793-37A
■ TYPICAL CHARACTERISTICS
Power supply current-Power supply voltage
Detection voltage-Ambient temperature
40
4.0
Ta = −40°C to +85°C
35
Power supply current: ICC (µA)
25
Watchdog timer monitoring
(VINH = 0 V)
20
15
10
MB3793-37A
VINH
f = 1 kHz
Duty = 10%
VL = 0 V
VH = VCC
VCC
Detection voltage: VSH and VSL (V)
VSH (Ta = +25°C)
30
3.9
MAX
MAX
3.8
TYP
3.7
MIN
3.6
VSL (Ta = +25°C)
CTP
CTW
0.01 µF 0.1 µF
(Ta = −40°C to +85°C)
−40 −20 0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10
20
40
60
80 100
Power supply voltage: VCC (V)
Ambient temperature: Ta (°C)
Reset output voltage-Reset output current
(P-MOS side)
Reset output voltage-Reset output current
(N-MOS side)
Ta = −40°C
4.9
Ta = +25°C
4.8
4.7
4.6
4.5
4.4
4.3
4.2
Ta
VRESET
RON IRESET
−40°C 98 mV 19.6 Ω
+25°C 135 mV 27 Ω +5 mA
+85°C 167 mV 33.4 Ω
500
Ta = +85°C
Ta
VRESET
RON IRESET
−40°C 4.800 V 40 Ω
+25°C 4.750 V 50 Ω −5 mA
+85°C 4.707 V 58.6 Ω
Reset output voltage: VRESET (mV)
5.0
Reset output voltage: VRESET (V)
VSL
MIN
3.5
0
VSH
TYP
400
Ta = +25°C
300
Ta = +85°C
200
100
Ta = −40°C
4.1
4.0
0
−1 −2 −3 −4 −5 −6 −7
−8 −9 −10
Reset output current: IRESET (mA)
0
0
1
2
3
4
5
6
7
8
9
10
Reset output current: IRESET (mA)
(Continued)
13
MB3793-37A
Reset-on reset time-Ambient temperature
(when VCC rising)
Reset output voltage-Power supply voltage
260
7
Pull-up resistance: 100 kΩ
240
220
5
Power-on reset time: tPR (ms)
Reset output voltage: VRESET (V)
6
4
3
Ta = +85°C
2
Ta = +25°C
1
Ta = −40°C
0
0
1
2
3
4
5
6
Ta = −40°C to +85°C
200
Ta = +25°C
180
MAX
160
140
120
TYP
100
80
MIN
60
7
40
Power supply voltage: VCC (V)
20
0
−40 −20
0
20 40
60 80 100
Ambient temperature: Ta (°C)
Watchdog timer reset time-Ambient
temperature (when monitoring)
26
26
24
24
Ta = −40°C to +85°C
Watchdog timer monitoring time: tWD (ms)
22
Watchdog timer reset time: tWR (ms)
Watchdog timer monitoring time-Ambient
temperature
20
18
16
Ta = +25°C
14
MAX
12
TYP
10
8
6
MIN
4
MAX
22
20
Ta = +25°C
18
16
TYP
14
12
10
8
MIN
6
4
2
0
Ta = −40°C to +85°C
2
−40 −20
0
0
20 40
60 80 100
Ambient temperature: Ta (°C)
−40 −20
0
20 40
60 80 100
Ambient temperature: Ta (°C)
(Continued)
14
MB3793-37A
(Continued)
Reset time-CTP capacitance
103
104
103
10
Reset time: tWR (ms)
Power-on reset time: tPR (ms)
Power-on reset time-CTP capacitance
Ta = −40°C
2
Ta = +25°C
101
Ta = +85°C
1
10 −1
10−4
10−3
10−2
10−1
102
Ta = −40°C
10
1
1
Ta = +25°C
Ta = +85°C
−1
10
101
1
102
Power-on reset time setting capacitance: CTP (µF)
10−2
10−4
10−3
10−2
10−1
1
101
102
Power-on reset time setting capacitance: CTP (µF)
Watchdog-timer monitoring time: tWD (ms)
Watchdog-timer monitoring time-CTW capacitance
103
Ta = −40°C
102
Ta = +25°C
1
10
1
Ta = +85°C
−1
10
10−5
10−4
10−3
10−2
10−1
1
101
Watchdog-timer monitoring time
setting capacitance: CTW (µF)
15
MB3793-37A
■ APPLICATION EXAMPLE
1. Supply voltage monitor and watchdog timer (1-clock monitor)
VCC
5
VCC
2 CTW
RESET 1
M B 3 7 9 3
RESET
CTW*
3 CTP
CTP*
CK1 8
VCC
Microprocessor
CK
6 INH
GND
4
CK2 7
GND
GND
* : Use a capacitor with less leakage current.
The MB3793 monitors the clock (CK1/2) at every other input pulse.
2. Supply voltage monitor and watchdog timer stop
VCC
6 INH
5
VCC
RESET 1
RESET
M B 3 7 9 3
2 CTW
CK1 8
VCC
Microprocessor 1
CK
HALT
GND
CTW*
CTP*
3 CTP
GND
CK2 7
4
GND
* : Use a capacitor with less leakage current.
16
RESET
VCC
Microprocessor 2
CK
HALT
GND
MB3793-37A
■ TYPICAL APPLICATION
VCC
5
VCC
2 CTW
RESET 1
RESET
MB3793
CTW*
CTP*
3 CTP
VCC
Microprocessor 1
CK1 8
GND
VCC
Microprocessor 2
CK
CK
GND
6 INH
RESET
GND
CK2 7
4
GND
* : Use a capacitor with less leakage current.
1. Equation of time-setting capacitances (CTP and CTW) and set time
.
tPR [ms] =. A × CTP [µF]
.
tWD [ms] =. B × CTW [µF] + C × CTP [µF]
.
However, when CTP ≤ about 10, tWD [ms] =. B × CTW [µF]
CTW
.
tWR [ms] =. D × CTP [µF]
Values of A, B, C, and D
A
B
C
D
Remark
1300
1500
0
100
VCC = 5.0 V
2. (Example) when CTP = 0.1 µF and CTW = 0.01 µF
tPR
time
(msec)
tWD
tWR
.
=. 130
.
=. 15
.
=. 10
17
MB3793-37A
■ ORDERING INFORMATION
Part number
18
Package
MB3793-37PF
8-pin Plastic SOP
(FPT-8P-M01)
MB3793-37PNF
8-pin Plastic SOL
(FPT-8P-M02)
Remarks
MB3793-37A
■ PACKAGE DIMENSIONS
8-pin Plastic SOP
(FPT-8P-M01)
+0.25
2.25(.089)MAX
(Mounting height)
+.010
6.35 –0.20 .250 –.008
0.05(.002)MIN
(STAND OFF)
5.30±0.30
(.209±.012)
INDEX
1.27(.050)
TYP
0.45±0.10
(.018±.004)
3.81(.150)REF
+0.40
6.80 –0.20
7.80±0.40
(.307±.016)
+.016
.268 –.008
+0.05
Ø0.13(.005)
M
0.15 –0.02
+.002
.006 –.001
0.50±0.20
(.020±.008)
Details of "A" part
0.20(.008)
0.50(.020)
"A"
0.18(.007)MAX
0.10(.004)
C
1994 FUJITSU LIMITED F08002S-4C-4
0.68(.027)MAX
Dimensions in mm (inches)
(Continued)
19
MB3793-37A
(Continued)
8-pin Plastic SOL
(FPT-8P-M02)
+0.25
+.010
5.05 –0.20 .199 –.008
1.55±0.20(.061±.008)
(Mounting height)
0.15±0.10
(STAND OFF)
(.006±.004)
3.90±0.30
(.154±.012)
6.00±0.40
(.236±.016)
5.00±0.30
(.197±.012)
45°
0.40(.016)
1.27(.050)TYP
0.42±0.10
(.017±.004)
Ø0.13(.005)
M
0.20±0.05
(.008±.002)
0.50±.020
(.020±.008)
Details of "A" part
0.40(.016)
"A"
3.81(.150)REF
0.10(.004)
0.20(.008)
0.18(.007)MAX
0.65(.026)MAX
C
20
1994 FUJITSU LIMITED F08004S-2C-4
Dimensions in mm (inches)
MB3793-37A
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 211-8588, Japan
Tel: 81(44) 754-3763
Fax: 81(44) 754-3329
http://www.fujitsu.co.jp/
North and South America
FUJITSU MICROELECTRONICS, INC.
Semiconductor Division
3545 North First Street
San Jose, CA 95134-1804, USA
Tel: (408) 922-9000
Fax: (408) 922-9179
Customer Response Center
Mon. - Fri.: 7 am - 5 pm (PST)
Tel: (800) 866-8608
Fax: (408) 922-9179
http://www.fujitsumicro.com/
Europe
FUJITSU MIKROELEKTRONIK GmbH
Am Siebenstein 6-10
D-63303 Dreieich-Buchschlag
Germany
Tel: (06103) 690-0
Fax: (06103) 690-122
http://www.fujitsu-ede.com/
Asia Pacific
FUJITSU MICROELECTRONICS ASIA PTE LTD
#05-08, 151 Lorong Chuan
New Tech Park
Singapore 556741
Tel: (65) 281-0770
Fax: (65) 281-0220
All Rights Reserved.
The contents of this document are subject to change without
notice. Customers are advised to consult with FUJITSU sales
representatives before ordering.
The information and circuit diagrams in this document are
presented as examples of semiconductor device applications,
and are not intended to be incorporated in devices for actual use.
Also, FUJITSU is unable to assume responsibility for
infringement of any patent rights or other rights of third parties
arising from the use of this information or circuit diagrams.
FUJITSU semiconductor devices are intended for use in
standard applications (computers, office automation and other
office equipment, industrial, communications, and measurement
equipment, personal or household devices, etc.).
CAUTION:
Customers considering the use of our products in special
applications where failure or abnormal operation may directly
affect human lives or cause physical injury or property damage,
or where extremely high levels of reliability are demanded (such
as aerospace systems, atomic energy controls, sea floor
repeaters, vehicle operating controls, medical devices for life
support, etc.) are requested to consult with FUJITSU sales
representatives before such use. The company will not be
responsible for damages arising from such use without prior
approval.
Any semiconductor devices have an inherent chance of
failure. You must protect against injury, damage or loss from
such failures by incorporating safety design measures into your
facility and equipment such as redundancy, fire protection, and
prevention of over-current levels and other abnormal operating
conditions.
If any products described in this document represent goods or
technologies subject to certain restrictions on export under the
Foreign Exchange and Foreign Trade Law of Japan, the prior
authorization by Japanese government will be required for
export of those products from Japan.
http://www.fmap.com.sg/
F9901
 FUJITSU LIMITED Printed in Japan
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