MB3793-34A
Power-Voltage Monitoring IC with
Watchdog Timer
Cypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600
Document Number: 002-08556 Rev. *A Revised March 31, 2016
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 fail-safe function for various application systems.
Features
■Precise detection of power voltage fall: 2.5%
■Detection voltage with hysteresis
■Low power dispersion: ICC = 38 A (Typ)
■Internal dual-input watchdog timer
■Watchdog timer halt function
■Independently-set watchdog and reset times
Application
Arcade Amusement etc.
Model No. Marking Code Detection voltage
MB3793-34A 3793AJ 3.4 V
MB3793-34A
Document Number: 002-08556 Rev. *A Page 2 of 26
Contents
Pin Assignment ................................................................3
Pin Description .................................................................3
Block Diagram .................................................................. 4
Block Functions ................................................................5
Absolute Maximum Ratings ............................................ 6
Recommended Operating Conditions ............................6
Electrical Characteristics .................................................7
DC Characteristics ......................................................7
AC Characteristics .......................................................8
Timing Diagram ................................................................9
Basic operation (Positive clock pulse) ........................9
Basic operation (Negative clock pulse) ....................10
Single-clock input monitoring
(Positive clock pulse) .................................................11
Inhibition operation (Positive clock pulse) .................12
Clock pulse input supplementation
(Positive clock pulse) ................................................. 13
Operation Sequence ....................................................... 14
Positive clock pulse input .......................................... 14
Negative clock pulse input ......................................... 14
Single-clock input monitoring .................................... 14
Description of Operations .......................................... 14
Typical Characteristics ................................................. 16
Application Example ...................................................... 19
Supply voltage monitor and watchdog timer ............. 19
Supply voltage monitor and watchdog timer stop ...... 20
Usage Precaution ........................................................... 21
Ordering Information ...................................................... 21
RoHS Compliance Information of
Lead (Pb) Free version ................................................... 22
Labeling Sample (Lead free version) ........................... 22
Marking Format (Lead Free version) ........................... 22
MB3793-34APNF Recommended Conditions
Of Moisture Sensitivity Level ........................................ 23
Package Dimensions 2...................................................... 4
Document History ........................................................... 25
MB3793-34A
Document Number: 002-08556 Rev. *A Page 3 of 26
1. Pin Assignment
2. Pin Description
Pin No. Symbol Description
1 RESET Outputs reset pin
2 CTW Sets watchdog timer monitoring time pin
3 CTP Sets power-on reset hold time pin
4 GND Ground pin
5 VCC Power supply pin
6INH
This pin forces the watchdog timer on/off. When this pin is High level, the
watchdog timer is stopped.
7 CK2 Inputs clock 2 pin
8 CK1 Inputs clock 1 pin
RESET
CTW
CTP
GND
CK1
CK2
INH
VCC
(FPT-8P-M02)
(TOP VIEW)
1
2
3
4
8
7
6
5
MB3793-34A
Document Number: 002-08556 Rev. *A Page 4 of 26
3. Block Diagram
I1 = 3 μA
..I2 = 30 μA
..
R1 =
435 kΩ
..
3
1
6
2
8
7
5
4
CTP
To V CC of all blocks
Pulse generator 1
Watchdog
timer
Reference
voltage
generator
To GND of
all blocks
Pulse generator 2
Output circuit
Logic circuit
RESET
INH
CTW
CK1
CK2
VCC
GND
Comp.S
−
+
VS
VREF = 1.24 V
..
R2 =
240 kΩ
..
MB3793-34A
Document Number: 002-08556 Rev. *A Page 5 of 26
4. 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 R1 and R2. When VS falls below 1.24 V, a reset signal is output. This function enables the MB3793 to
detect an abnormality within 1 s when the power is cut or falls abruptly.
2. Output circuit
The output circuit has a comparator to control the reset signal (RESET) output. When the voltage at the CTP pin for setting the
power-on reset hold time exceeds the threshold voltage, resetting is canceled.
Since the reset (RESET) output buffer has the CMOS organization, no pull-up resistor is needed.
3. Pulse generator
The pulse generator generates pulses when the voltage at the CK1 and CK2 input clock pins changes from Low level to High 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. Logic circuit
Logic circuit controls charging and discharging of the power-on reset hold time setting capacity (CTP) on a signal of Comp.S and
Watchdog timer.
MB3793-34A
Document Number: 002-08556 Rev. *A Page 6 of 26
5. Absolute Maximum Ratings
* : The 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.
6. Recommended Operating Conditions
* : 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 representatives beforehand.
Parameter Symbol Conditions Rating Unit
Min Max
Power supply voltage* VCC —-0.3+7 V
Input voltage*
CK1 VCK1 —
-0.3 VCC + 0.3
(≤+7) VCK2 VCK2 —
INH VINH —
Reset output voltage*
RESET
VOL
VOH
—-0.3
VCC + 0.3
(≤+7) V
Reset output current IOL
IOH
—-10+10mA
Power dissipation PDTa ≤ +85°C — 200 mW
Storage temperature Tstg — -55 +125 °C
Parameter Symbol Conditions Value Unit
Min Typ Max
Power supply voltage VCC —1.25.06.0V
Reset (RESET) output current IOL —0— + 5
mA
IOH —-5—0
Power-on reset hold time setting capacity CTP —0.0010.110μF
Watchdog-timer monitoring time setting
capacity* CTW — 0.001 0.01 1 μF
Operating ambient temperature Ta — -40 +25 +85 °C
MB3793-34A
Document Number: 002-08556 Rev. *A Page 7 of 26
7. Electrical Characteristics
7.1 DC Characteristics
* : This parameter is guaranteed by design, which is not supported by a final test.
(VCC = +5 V, Ta = +25°C)
Parameter Symbol Conditions Value Unit
Min Typ Max
Power current ICC1 After exit from reset — 38 50 μA
Detection voltage
VSL VCC falling Ta = +25°C 3.32 3.40 3.48 V
Ta = -40 to +85°C 3.27* 3.40 3.53*
VSH VCC rising Ta = +25°C 3.40 3.48 3.56 V
Ta = -40 to +85°C 3.35* 3.48 3.61*
Detection voltage
hysteresis difference VSHYS VSH - VSL 35 80 120 mV
CK input threshold voltage VCIH — 1.4* 1.9 2.5 V
VCIL — 0.8 1.3 1.8* V
CK input hysteresis VCHYS — 0.4* 0.6 0.8* V
INH input voltage VIIH — 3.5 — VCC V
VIIL — 0 — 0.8 V
Input current
(CK1,CK2,INH)
IIH VIH = VCC — 0 1.0 μA
IIL VIL = 0 V -1.0 0 — μA
Reset output voltage VOH IRESET = -5 mA 4.5 4.75 — V
VOL IRESET = +5 mA — 0.12 0.4 V
Reset-output minimum power
voltage VCCL IRESET = +50 μA—0.81.2V
MB3793-34A
Document Number: 002-08556 Rev. *A Page 8 of 26
7.2 AC Characteristics
*: The voltage range is 10% to 90% at testing the reset output transition time.
(VCC = 5 V, Ta = 25C)
Parameter Symbol Conditions Value Unit
Min Typ Max
Power-on reset hold time tPR CTP = 0.1 μF 80 130 180 ms
Watchdog timer monitoring time tWD CTW = 0.01 μF
CTP = 0.1 μF7.5 15 22.5 ms
Watchdog timer reset time tWR CTP = 0.1 μF 5 10 15 ms
CK input pulse width tCKW — 500 — — ns
CK input pulse cycle tCKT — 20 — — μs
Reset (RESET) output transition time Rising tr* CL = 50 pF — — 500 ns
Falling tf* CL = 50 pF — — 500 ns
MB3793-34A
Document Number: 002-08556 Rev. *A Page 9 of 26
8. Timing Diagram
8.1 Basic operation (Positive clock pulse)
CTP
RESET
INH
CTW
CK1
CK2
VSH
VCC
VSL
Vth
VH
VL
(1) (2) (3) (4)(5) (5) (6) (7) (8) (9) (10) (11) (12) (13)
tPR tWD tPR
tWR
tCKW
tCKT
MB3793-34A
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8.2 Basic operation (Negative clock pulse)
CTP
RESET
INH
CTW
CK1
CK2
VSH
VCC
VSL
Vth
VH
VL
tPR tWD tPR
tWR
tCKW
tCKT
(1) (2) (3) (4)(5) (5) (6) (7) (8) (9) (10) (11) (12) (13)
MB3793-34A
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8.3 Single-clock input monitoring (Positive clock pulse)
CTP
RESET
CTW
CK1
Vth
VH
VL
CK2
tWR
tWD
tCKT
tCKW
Note : 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.
MB3793-34A
Document Number: 002-08556 Rev. *A Page 12 of 26
8.4 Inhibition operation (Positive clock pulse)
CTP
RESET
INH
CTW
CK1
CK2
VSH
VCC
VSL
Vth
VH
VL
tPR tWD tPR
tWR
tCKW
(1) (2) (3) (4)(5) (5) (6) (7) (11) (8) (9) (10) (12) (13)
tCKT
MB3793-34A
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8.5 Clock pulse input supplementation (Positive clock pulse)
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.
MB3793-34A
Document Number: 002-08556 Rev. *A Page 14 of 26
9. Operation Sequence
9.1 Positive clock pulse input
Refer to “8.1. Basic operation (positive clock pulse)” under “8. Timing Diagram”.
9.2 Negative clock pulse input
Refer to “8.2. Basic operation (negative clock pulse)” under “8.Timing Diagram”.
The MB3793 operates in the same way whether it inputs positive or negative pulses.
9.3 Single-clock input 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.
Refer to “8.3. Single-clock input monitoring (positive clock pulse)” under “8.Timing Diagram”.
9.4 Description of Operations
The numbers given to the following items correspond to numbers 1 to 13 used in “8.Timing 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 3.48 V (Typ).
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).
The Vth value is about 3.6 V with VCC = 5.0 V
The power-on reset hold time tPR is set with the following equation:
tPR (ms) A CTP (F)
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 (F) C × CTP (μF)
The value of B is hardly affected by the power supply voltage; it is about 1500 with VCC = 5.0 V.
The value of C is 0.
For this reason:
tWD (ms) B × CTW (μF)
..
=
..
=
..
=
MB3793-34A
Document Number: 002-08556 Rev. *A Page 15 of 26
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 × CTP (F)
The value of D is 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 3.40 V (Typ).
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.
The inhibition (INH) pin must be connecting a voltage of more low impedance, to evade of the noise.
12.Cancelling 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.
..
=
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/CTW 10 or less, tWD [ms] B × CTW [μF]
tWR [ms] D × CTP [μF]
Values of A, B, C, and D
Note: The width of value of tPR, tWD and tWR becomes the same ratio as width (Min, Max) of each
specification value.
2. Example (when CTP = 0.1 μF and CTW = 0.01 μF)
ABCD Remark
1300 1500 0 100 VCC = 5.0 V
time
(ms)
Symbol VCC = 5.0 V
tPR 130
tWD 15
tWR 10
=
..
=
..
=
..
=
..
=
..
MB3793-34A
Document Number: 002-08556 Rev. *A Page 16 of 26
10. Typical Characteristics
(Continued)
45
40
35
30
25
20
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
MB3793
VINH VCC
(VINH = 0 V)
Ta = +25 °C
Ta = +85 °C
Ta = -40 °C
0
012345678910
0.1
0.2
0.3
0.4
0.5
0.6
3.2
-20-40 0 +20 +40 +60 +80 +100 +120
3.3
3.4
3.5
3.6
3.7
VSH
VSL
0 -1-2-3-4-5 -6-7 -8-9-10
Ta = +25 °C
Ta = +85 °C
Ta = -40 °C
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
ICC - VCC characteristics
Power current ICC (μA)
Power voltage VCC (V)
Watchdog timer monitoring
Detection voltage
VSH and VSL (V)
Operating ambient temperature Ta (C)
Reset output current I RESET (mA)
Reset output voltage
V RESET (V)
V RESET - I RESET characteristics
(P-MOS side)
V RESET - I RESET characteristics
(N-MOS side)
Reset output voltage
V RESET (V)
Reset output current I RESET(mA)
VSH, VSL - Ta characteristics
fCK= 1 kHz, Duty 10%
VL 0 V/VH VCC
CTW 0.01 μF, CTP 0.1 μF
MB3793-34A
Document Number: 002-08556 Rev. *A Page 17 of 26
(Continued)
7
6
5
4
3
2
1
0
01234567
Ta = +85 °C
Ta = +25 °C
Ta = -40 °C
-40 -20 0 +20 +40 +60 +80 +100 +120
0
20
40
60
80
100
120
140
160
180
200
220
240
260
at VCC = 5.0 V
−40 −20 0 +20 +40 +60 +80 +100 +120
0
2
4
6
8
10
12
14
16
18
20
22
24
26
at VCC = 5.0 V
−40 −20 0 +20 +40 +60 +80 +100 +120
0
2
4
6
8
10
12
14
16
18
20
22
24
26
at VCC = 5.0 V
VRESET - VCC characteristics
Power voltage VCC (V)
Reset output voltage
VRESET (V)
Pull-up resistance: 100 k
tPR - Ta characteristics
Operating ambient temperature Ta (C)
Power-on reset hold time
tPR (ms)
tWR - Ta characteristics tWD - Ta characteristics
Operating ambient temperature Ta (C) Operating ambient temperature Ta (C)
Watchdog timer reset time
tWR (ms)
Watchdog timer monitoring time
tWD (ms)
MB3793-34A
Document Number: 002-08556 Rev. *A Page 18 of 26
(Continued)
104
103
102
101
1
10 −1
10−410−310−210−1110
1102
Ta = −40 °C
Ta = +25 °C
Ta = +85 °C
103
102
101
1
10−1
10−410−310−210−1110
1102
10−2
Ta = −40 °C
Ta = +25 °C
Ta = +85 °C
103
102
101
1
10−1
10−410−310−210−1110
1
10−5
Ta = −40 °C
Ta = +25 °C
Ta = +85 °C
CTP = 0.01 μF
tPR - CTP characteristics tWR - CTP characteristics
Power-on reset hold time
tPR (ms)
Power-on reset time setting capacitance
CTP (F)
Power-on reset time setting capacitance
CTP (F)
tWD - CTW characteristics
Watchdog timer monitoring time
tWD (ms)
Watchdog timer monitoring time setting capacitance
CTW (F)
Watchdog timer reset time
tWR (ms)
MB3793-34A
Document Number: 002-08556 Rev. *A Page 19 of 26
11. Application Example
11.1 Supply voltage monitor and watchdog timer
11.1.1 1-clock monitor
11.1.2 2-clock monitor
5
2
3
6
4
7
8
1
RESET VCC
RESET
CK
GND
GND
GND
CTW*CTP*
VCC
VCC
CTW
CTP CK1
CK2INH
MB3793
* : Use a capacitor with less leakage current.
Microprocessor
2
3
6
1
8
7
4
5
VCC
CTW* CTP*
GND
INH GND
VCC
CTP
CTW RESET
CK1
CK2
RESET
CK
GND
VCC RESET
CK
GND
VCC
MB3793
* : Use a capacitor with less leakage current.
Microprocessor1 Microprocessor2
MB3793-34A
Document Number: 002-08556 Rev. *A Page 20 of 26
11.2 Supply voltage monitor and watchdog timer stop
3. Setting of compulsory reset
GND
C
TW
*C
TP
*
V
CC
RESET V
CC
CK
GND
RESET V
CC
CK
GND
HALT
HALT
5
2
3
6
4
7
8
1
RESET
GND
V
CC
INH
CTW
CK1
CK2
CTP
MB3793
* : Use a capacitor with less leakage current.
Microprocessor1 Microprocessor2
* : Use a capacitor with less leakage current.
It is possible for the RESET pin to fix to “L” if the CTP pin is short-circuited to GND.
Take care not to change the value of the CTP capacity because of the influence of Tr that is used at
the time.
5
2
3
6
4
7
8
1
RESET VCC
RESET
CK
GND
GND
GND
CTW
*CTP
*
RESIN
10 kΩ
VCC
VCC
CTW
CTP CK1
CK2INH
MB3793
Microprocessor
MB3793-34A
Document Number: 002-08556 Rev. *A Page 21 of 26
12. Usage Precaution
1. Do not configure the IC over the maximum ratings
If the lC is used over the maximum ratings, the LSl may be permanently damaged.
It is preferable for the device to normally operate within the recommended usage conditions. Usage outside of these conditions
can have a bad effect on the reliability of the LSI.
2. Use the devices within recommended operating conditions
The recommended operating conditions are under which the LSl is guaranteed to operate.
The electrical ratings are guaranteed when the device is used within the recommended operating conditions and under the condi-
tions stated for each item.
3. Printed circuit board ground lines should be set up with consideration for common impedance
4. Take appropriate measures against static electricity
• Containers for semiconductor materials should have anti-static protection or be made of conductive material.
• After mounting, printed circuit boards should be stored and shipped in conductive bags or containers.
• Work platforms, tools, and instruments should be properly grounded.
• Working personnel should be grounded with resistance of 250 k to 1 M between body and ground.
5. Do not apply negative voltages
The use of negative voltages below –0.3 V may create parasitic transistors on LSI lines, which can cause malfunctions.
13. Ordering Information
Part number Package Remarks
MB3793-34APNF 8-pin plastic SOP
(FPT-8P-M02)
MB3793-34A
Document Number: 002-08556 Rev. *A Page 22 of 26
14. RoHS Compliance Information of Lead (Pb) Free version
The LSI products of Cypress with “E1” are compliant with RoHS Directive , and has observed the standard of lead, cadmium, mercury,
Hexavalent chromium, polybrominated biphenyls (PBB) , and polybrominated diphenyl ethers (PBDE).
The product that conforms to this standard is added “E1” at the end of the part number.
15. Labeling Sample (Lead free version)
16. Marking Format (Lead Free version)
2006/03/01
ASSEMBLED IN JAPAN
G
QC PASS
(3N) 1MB123456P-789-GE1
1000
(3N)2 1561190005 107210
1,000
PCS
0605 - Z01A
1000
1/1
1561190005
MB123456P - 789 - GE1
MB123456P - 789 - GE1
MB123456P - 789 - GE1
Pb
Lead-free mark
JEITA logo JEDEC logo
The part number of a lead-free product has the
trailing characters “E1”.
“ASSEMBLED IN CHINA” is printed on the label of a
product assembled in China.
3793AJ
XXXX
E1 XXX
Lead Free version
SOP-8
(FPT-8P-M02)
MB3793-34A
Document Number: 002-08556 Rev. *A Page 23 of 26
17. MB3793-34APNF Recommended Conditions Of Moisture Sensitivity Level
[Temperature Profile for FJ Standard IR Reflow]
1. IR (infrared reflow)
2. Manual soldering (partial heating method)
Conditions : Temperature 400°C Max
Times : 5 s max/pin
Item Condition
Mounting Method IR (infrared reflow) , Manual soldering (partial heating method)
Mounting times 2 times
Storage period
Before opening Please use it within two years after
Manufacture.
From opening to the 2nd
reflow Less than 8 days
When the storage period after
opening was exceeded
Please processes within 8 days
after baking (125°C, 24H)
Storage conditions 5°C to 30°C, 70%RH or less (the lowest possible humidity)
260 °C
(e)
(d')
(d)
255 °C
170 °C
190 °C
RT (b)
(a)
(c)
to
Note : Temperature : the top of the package body
(a) Temperature Increase gradient : Average 1°C/s to 4°C/s
(b) Preliminary heating : Temperature 170°C to 190°C, 60s to 180s
(c) Temperature Increase gradient : Average 1°C/s to 4°C/s
(d) Peak temperature : Temperature 260°C Max; 255°C or more, 10s or less
(d’) Main heating : Temperature 230°C or more, 40s or less
or
Temperature 225°C or more, 60s or less
or
Temperature 220°C or more, 80s or less
(e) Cooling : Natural cooling or forced cooling
H rank : 260°C Max
Main heating
MB3793-34A
Document Number: 002-08556 Rev. *A Page 24 of 26
18. Package Dimensions
8-pin plastic SOP Lead pitch 1.27 mm
Package width
×
package length
3.9 × 5.05 mm
Lead shape Gullwing
Sealing method Plastic mold
Mounting height 1.75 mm MAX
Weight 0.06 g
8-pin plastic SOP
(FPT-8P-M02)
(FPT-8P-M02)
C
2002 FUJITSU LIMITED F08004S-c-4-7
1.27(.050)
3.90±0.30 6.00±0.40
.199 –.008
+.010
–0.20
+0.25
5.05
0.13(.005)
M
(.154±.012) (.236±.016)
0.10(.004)
14
58
0.44±0.08
(.017±.003)
–0.07
+0.03
0.22
.009 +.001
–.003
45˚
0.40(.016)
"A" 0~8˚
0.25(.010)
(Mounting height)
Details of "A" part
1.55±0.20
(.061±.008)
0.50±0.20
(.020±.008)
0.60±0.15
(.024±.006)
0.15±0.10
(.006±.004)
(Stand off)
0.10(.004)
*1
*2
Dimensions in mm (inches).
Note: The values in parentheses are reference values.
©2002-2008 FUJITSU MICROELECTRONICS LIMITED F08004S-c-4-8
Note 1) *1 : These dimensions include resin protrusion.
Note 2) *2 : These dimensions do not include resin protrusion.
Note 3) Pins width and pins thickness include plating thickness.
Note 4) Pins width do not include tie bar cutting remainder.
MB3793-34A
Document Number: 002-08556 Rev. *A Page 25 of 26
Document History
Spansion Publication Number: DS04-27407-1E
Document Title: MB3793-34A Power-Voltage Monitoring IC with Watchdog Timer
Document Number: 002-08556
Revision ECN Orig. of
Change
Submission
Date Description of Change
** —TAOA 11/30/2009 Migrated to Cypress and assigned document number 002-08556.
No change to document contents or format.
*A 5199120 TAOA 03/31/2016 Updated to Cypress format.
Document Number: 002-08556 Rev. *A Revised March 31, 2016 Page 26 of 26
MB3793-34A
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