DS04-27400-9E
FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP For power supply applications
BIPOLAR
Power Supply Monitor
MB3771
■DESCRIPTION
The Fujitsu MB3771 is designed to monitor the v oltage level of one or tw o po w er supplies (+5 V and an arbitrary
voltage) in a microprocessor circuit, memory board in large-size computer, for example.
If the circuit’s power supply de viates more than a specified amount, then the MB3771 gener ates a reset signal to
the microprocessor. Thus, the computer data is protected from accidental erasure.
Using the MB3771 requires few exter nal components. To monitor only a +5 V supply, the MB3771 requires the
connection of one exter nal capacitor. The level of an arbitrary detection voltage is deter mined by two exter nal
resistors. The MB3771 is a vailable in an 8-pin Dual In-Line, Single In-Line P ackage or space sa ving Flat Package.
■FEATURES
• Precision voltage detection (VSA = 4.2 V ± 2.5 %)
• User selectable threshold level with hysterisis (VSB = 1.23 V ± 1.5 %)
• Monitors the voltage of one or two power supplies (5 V and an arbitrary voltage, >1.23 V)
• Usable as over voltage detector
• Low voltage output for reset signal (VCC = 0.8 V Typ)
• Minimal number of external components (one capacitor Min)
• Low power dissipation (ICC = 0.35 mA Typ, VCC = 5 V)
• Detection threshold voltage has hysteresis function
• Reference voltage is connectable.
■PACKAGES
8-pin plastic DIP 8-pin plastic SIP 8-pin plastic SOP
(DIP-8P-M01) (SIP-8P-M03) (FPT-8P-M01)
MB3771
2
■
■■
■PIN ASSIGNMENT
■
■■
■BLOCK DIAGRAM
CT
VSC
OUTC
GND
RESET
VSA
VSB /RESIN
VCC
1
2
3
4
8
7
6
5
(TOP VIEW)
(DIP-8P-M01)
(FPT-8P-M01)
RESET
VSA
VSB / RESIN
VCC
GND
OUTC
VSC
CT
8
7
6
5
4
2
3
1
(FRONT VIEW)
(SIP-8P-M03)
VSA
VSB / RESIN
RESET
≅ 1.24 V
≅ 12 µA≅ 10 µA
≅ 1.24 V
REFERENCE VOLTAGE
≅ 40 kΩ
−
+
Comp. A
Comp. B R
S
Q
VCC
VSC
GND
CTOUTC
7
6
5
2
4
38
1
Comp. C
+
−
−
+
++
−
−
≅ 100 kΩ
MB3771
3
■
■■
■FUNCTIONAL DESCRIPTIONS
Comparators Comp .A and Comp .B apply a h ysteresis to the detected voltage , so that when the voltage at either
the VSA or VSB pin falls below 1.23 V the RESET output signal goes to “low” level.
Comp. B may be used to detect any given voltage(Sample Application 3), and can also be used as a forced
reset pin (with reset hold time) with TTL input (Sample Application 6).
Note that if Comp.B is not used, the VSB pin should be connected to the VCC pin (Sample Application 1).
Instantaneous breaks or drops in the power supply can be detected as abnormal conditions by the MB3771
within a 2 µs interval. However because momentar y breaks or drops of this duration do not cause problems in
actual systems in some cases, a delayed trigger function can be created b y connecting capacitors to the VSA or
VSB pin (Sample Application 8).
Because the RESET output has built-in pull-up resistance, there is no need to connect to external pull-up
resistance when connected to a high impedance load such as a CMOS logic IC.
Comparator Comp. C is an open-collector output comparator without hysteresis, in which the polarity of input/
output characteristics is reversed. Thus Comp. C is useful for over-voltage detection (Sample Application 11)
and positive logic RESET signal output (Sample Application 7), as well as for creating a reference voltage
(Sample Application 10).
Note that if Comp. C is not used, the VSC pin should be connected to the GND pin (Sample Application 1).
■
■■
■FUNCTION EXPLANATION
(1) When VCC rises to about 0.8V, RESET goes low.
(2) When VCC reaches VS +VHYS, CT then begins charging. RESET remains low during this time
(3) RESET goes high when CT begins charging.
TPO := CT × 10 5 (Refer to CT pin capacitance vs. hold time )
(4) When VCC level dropps lower then VS, then RESET goes low and CT starts discharging.
(5) When VCC level reaches VS + VHYS, then CT starts charging.
In the case of vo ltage sagging, if the period from the time VCC goes lower than or equal to VS to the time VCC
reaches VS +VHYS again, is longer than tPI, (as specified in the AC Characteristics), CT is discharged and charged
successively.
(6) After TPO passes, and VCC level exceeds VS + VHYS, then RESET goes high.
(7) Same as Point 4.
(8) RESET remains low until VCC drops below 0.8V.
VCC
CTRESET
1
2
3
4
8
7
6
5RESET
VCC
VS
0.8 V
VHYS
(1) (2) (3) (4) (5) (6) (7) (8)
TPO TPO
t
t
MB3771
4
■
■■
■ABSOLUTE MAXIMUM RATINGS
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
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.
Parameter Symbol Rating Unit
Min Max
Power supply voltage VCC −0.3 +20 V
Input voltage
VSA −0.3 VCC + 0.3 ( < +20) V
VSB −0.3 +20 V
VSC −0.3 +20 V
Power dissipation PD200 (Ta ≤ 85 °C) mW
Storage temperature Tstg −55 +125 °C
Parameter Symbol Value Unit
Min Max
Power supply voltage VCC 3.5 18 V
Output current IRESET 020mA
IOUTC 06mA
Operating ambient temperature Top −40 +85 °C
MB3771
5
■
■■
■ELECTRICAL CHARACTERISTICS
1. DC Characteristics (VCC = 5 V, Ta = + 25 °C)
Parameter Symbol Conditions Value Unit
Min Typ Max
Power supply current ICC1 VSB = 5 V, VSC = 0 V 350 500 µA
ICC2 VSB = 0 V, VSC = 0 V 400 600 µA
Detection voltage
VSAL
(DOWN) VCC 4.10 4.20 4.30 V
Ta = −40 °C to +85 °C 4.05 4.20 4.35 V
VSAH (UP) VCC 4.20 4.30 4.40 V
Ta = −40 °C to +85 °C 4.15 4.30 4.45 V
Hysterisis width VHYSA 50 100 150 mV
Detection voltage VSB VSB 1.212 1.230 1.248 V
Ta = −40 °C to +85 °C 1.200 1.230 1.260 V
Deviation of detection voltage ∆VSB VCC = 3.5 V to 18 V 310mV
Hysterisis width VHYSB 14 28 42 mV
Input current IIHB VSB = 5 V 0 250 nA
IILB VSB = 0 V 20 250 nA
Output voltage
VOHR IRESET = −5 µA, VSB = 5 V 4.5 4.9 V
VOLR IRESET = 3mA, VSB = 0 V 0.28 0.4 V
IRESET = 10mA, VSB = 0 V 0.38 0.5 V
Output sink current IRESET VOLR = 1.0 V, VSB = 0 V 20 40 mA
CT charge current ICT VSB = 5 V, VCT = 0.5 V 9 12 16 µA
Input current IIHC VSC = 5 V 0 500 nA
IILC VSC = 0 V 50 500 nA
Detection voltage VSC 1.225 1.245 1.265 V
Ta = −40 °C to +85 °C 1.205 1.245 1.285 V
Deviation of detection voltage ∆VSC VCC = 3.5 V to 18 V 310mV
Output leakage current IOHC VOHC = 18 V 01 µA
Output voltage VOLC IOUTC = 4 mA, VSC = 5 V 0.15 0.4 V
Output sink current IOUTC VOLC = 1.0 V, VSC = 5 V 6 15 mA
Reset operation minimum
supply voltage VCCL VOLR = 0.4 V, IRESET = 200 µA0.8 1.2 V
MB3771
6
2. AC Characteristics (VCC = 5 V, Ta = + 25 °C, CT = 0.01 µF)
*1: In case of VSB termination.
*2: In case of VSC termination.
Parameter Symbol Conditions Value Unit
Min Typ Max
VSA, VSB input pulse width tPI 5.0 µs
Reset hold time tPO 0.5 1.0 1.5 ms
RESET rise time trRL = 2.2 kΩ,
CL = 100 pF 1.0 1.5 µs
RESET fall time tf0.1 0.5 µs
Propagation delay time
tPD*1210 µs
tPHL*2RL = 2.2 kΩ,
CL = 100 pF 0.5 µs
tPLH*21.0 µs
MB3771
7
■
■■
■APPLICATION CIRCUIT
1. 5V Power Supply Monitor
Monitored by VSA. Detection threshold voltage is VSAL and VSAH
2. 5V Power Supply Voltage Monitor (Externally Fine-Tuned Type)
The VSA detection voltage can be adjusted externally.
Resistance R1 and R2 are set sufficiently lower than the IC internal partial voltage resistance, so that the detection
voltage can be set using the ratio between resistance R1 and R2. (See the table below).
•R
1, R2 calculation formula (when R1 << 100 kΩ, R2 <<40 kΩ)
VSAL := (R1 + R2 ) × VSB /R2 [V], VSAH := (R1 + R2 ) × (VSB + VHYSB) / R2 [V]
R1 (kΩ)R
2 (kΩ)Detection voltage : VSAL (V) Detection voltage : VSAH (V)
10 3.9 4.37 4.47
9.1 3.9 4.11 4.20
VCC
CT
RESET
MB3771
1
2
3
4
8
7
6
5Logic
circuit
V
CC
C
T
RESET
MB3771
1
2
3
4
8
7
6
5
R
1
R
2
Logic
Circuit
MB3771
8
3. Arbitrary Voltage Supply Monitor
(1) Case: VCC ≤
≤≤
≤ 18 V
• Detection Voltage can be set by R1 and R2.
Detection Voltage = (R1 + R2) × VSB/R2
• Connect Pin 7 to VCC when VCC less than 4.45 V.
• Pin 7 can be opened when VCC greater than 4.45 V
Power Dissipation can be reduced.
Note : Hysteresis of 28 mV at VSB at termination is available.
Hysteresis width dose not depend on (R1 + R2).
(2) Monitoring VCC > 18 V
• Detection Voltage can be set by R1 and R2
Detection Voltage = (R1 + R2) × VSB/R2
• The RESET signal output is := 0V (low level) and := 5 V (high leve l). V CC voltage cannot be output.
Do not pull up RESET to VCC.
• Changing the resistance ratio betw een R4 and R5 changes the constant voltage output, thereby changing the
voltage of the high level RESET output. Note that the constant voltage output should not exceed 18 V.
• The 5 V output can be used as a power supply for control circuits with low current consumption.
• In setting the R3 resistance le vel, caution should be giv en to the power consumption in the resistor. The table
below lists sample resistance values for reference (using 1/4 Ω resistance).
• Values are actual measured values (using IOUTC = 100 µA, VOLC = 0.4 V). Lowering the resistance value of R3
reduces the minimum supply v oltage of the RESET output, b ut requires resistance with higher allow able loss .
VCC (V) Detection
voltage (V) RESET Output min.
power suppl y v olta ge (V) R1 (MΩ
ΩΩ
Ω) R2 (kΩ
ΩΩ
Ω) R3 (kΩ
ΩΩ
Ω) Output Current
(mA)
140 100 6.7 1.6 20 110 < 0.2
100 81 3.8 1.3 20 56 < 0.5
40 33 1.4 0.51 20 11 < 1.6
VCC
CT
RESET
MB3771
1
2
3
4
8
7
6
5
R1
R2
VCC
CT
RESET
1
2
3
4
8
7
6
5
R3
R1
R2
R4:
R5:
33 kΩ
0.47 µF
100 kΩ
5 V output(Stablized)
MB3771
9
4. 5 V and 12 V Power Supply Monitor (2 types of power supply monitor VCC1 = 5 V, VCC2 =12 V)
• 5 V is monitored b y VSA. Detection voltage is about 4.2 V
• 12 V is monitored by VSB. When R1 = 390 kΩ and R2 = 62 kΩ, Detection voltage is about 9.0 V.Generally the
detection voltage is determined by the following equation.
Detection Voltage = (R1 + R2) × VSB/R2
5. 5 V and 12 V Power Suppl y Monitor (RESET signal is generated b y 5 V, VCC1 = 5 V, VCC2 = 12 V)
• 5 V is monitored b y VSA, and generates RESET signal when VSA detects voltage sagging.
• 12 V is monitored by VSC, and generates its detection signal at OUTC.
• The detection voltage of 12 V monitoring and its hysterisis is determined by the following equations.
Detection voltage = R1 + R2 + R3 × VSC (8.95 V in the circuit above)
R2 + R3
Hysterisis width = R1 (R3 − R3 // R4) × VSC (200 mV in the circuit above)
(R2 + R3) (R2 + R3 // R4)
VCC2
CT
MB3771
1
2
3
4
8
7
6
5
R1: 390 kΩ
R2: 62 kΩ
RESET
VCC1
Logic
circuit
VCC2
CT
MB3771
1
2
3
4
8
7
6
5
R1: 390 kΩ
R2: 33 kΩ
RESET
VCC1
IRQ
R L: 10 kΩ
R5: 100 kΩ
R3: 30 kΩ
R4: 510 kΩ
or
Port Logic Circuit
MB3771
10
6. 5 V Power Supply Monitor with forced RESET input (VCC = 5 V)
RESIN is an TTL compatible input.
7. 5 V Power Supply Monitor with Non-inverted RESET
In this case, Comparator C is used to invert RESET signal. OUTC is an open-collector output.
RL is used an a pull-up resistor.
8. Supply Voltage Monitoring with Delayed Trigger
When the voltage shown in the diagram below is applied at VCC, the minimum value of the input pulse width is
increased to 40 µs (when C1 = 1000 pF).
The formula for calculating the minimum value of the input pulse width [TPI] is:
TPI [µs] := 4 × 10-2 × C1 [pF]
RESIN
CT
MB3771
1
2
3
4
8
7
6
5
RESET
VCC
Logic Circuit
CT
MB3771
1
2
3
4
8
7
6
5
RL: 10 kΩ
VCC
RESET
CT
MB3771
1
2
3
4
8
7
6
5
VCC
TP
RESET
C1
5 V
4 V
MB3771
11
9. Dual (Positive/Negative) Power Supply Voltage Monitoring (VCC = 5 V, VEE = Negative Power
Supply)
Monitors a 5 V and a negative (any given level) power supply. R1, R2, and R3 should be the same value.
Detection Voltage = VSB − VSB × R4/R3
Example if VEE = −5 V, R4 = 91 kΩ
Then the detected voltage = −4.37 V
In cases where VEE ma y be output when VCC is not output, it is necessary to use a Schottky barrier diode (SBD).
10. Reference Voltage Generation and Voltage Sagging Detection
(1) 9V Reference Voltage Generation and 5V/9V Monitoring
Detection Voltage = 7.2 V
In the abov e examples, the output v oltage and the detection v oltage are determined by the following equations:
Detection Voltage = (R1 + R2) × VSB/R2
CT
MB3771
1
2
3
4
8
7
6
5
RESET
VCC
VEE
0.22 µF
R4
R5 : 5.1 kΩ
R3 :
20 kΩR1 : 20 kΩ
R2 : 20 kΩ
SBD
CT
MB3771
1
2
3
4
8
7
6
5
RESET
V
CC : 5 V
0.47 µF
R
5 : 3 kΩ
R3 :
7.5 kΩR
1: 300 kΩ
R
2: 62 kΩ
R4 :
1.2 kΩ
15 V
9 V (≅ 50 mA)
MB3771
12
(2) 5 V Reference Voltage Generation and 5V Monitoring (No.1)
Detection Voltage = 4.2 V
In the abov e examples, the output v oltage and the detection v oltage are determined by the following equations:
Output Voltage = (R3 + R4) × VSC/R4
(3) 5 V Reference Voltage Generation and 5 V Monitoring (No. 2)
The v alue of R1 should be calculated from the current consumption of the MB3771, the current flowing at R2 and
R3, and the 5 V output current. The table below provides sample resistance values for reference.
(4) 1.245 V Reference Voltage Generation and 5 V Monitoring
Resistor R1 determines Reference current. Using 1.2 kΩ as R1, reference current is about 2 mA.
VCC (V) R1 (kΩ) Output Current (mA)
40 11 < 1.6
24 6.2 < 1.4
15 4.7 < 0.6
CT
MB3771
1
2
3
4
8
7
6
5
RESET
0.47 µF
R5 : 3 kΩ
R3 : 3.6 kΩ
R4 : 1.2 kΩ
15 V
5 V(≅ 50 mA)
CT
1
2
3
4
8
7
6
5
RESET
VCC
0.47 µF
R3 : 33 kΩ
R1
R2 :
100 kΩ
5 V
GND
CT
1
2
3
4
8
7
6
5
RESET
VCC
(5 V)
0.47 µF
R1 : 10 kΩ
GND
Reference Voltage
1.245 V Typ
MB3771
13
11. Low Voltage and Over Voltage Detection (VCC = 5 V)
VSH has no hysteresis. When over voltage is detected, RESET is held in the constant time as well as when
low voltage is detected.
VSL = (R1 + R2) × VSB/R2
VSH = (R3 + R4) × VSC/R4
12. Detection of Abnormal State of Power Supply System (VCC = 5 V)
• This Example circuit detects abnormal low/over voltage of power supply voltage and is indicated by LED
indicator. LED is reset by the CLEAR key.
• The detection levels of low/over voltages are determined by VSA, and R1 and R2 respectively.
CT
1
2
3
4
8
7
6
5
RESET
VCC
R1
MB3771
R2
R3
R4
RESET
VCC
VSL VSH
1
2
3
4
8
7
6
5
VCC
R1MB3771 R3: 620 Ω
R4:
1 kΩto 100 kΩ
CLEAR
R2
LED
MB3771
14
13. Back-up Power Supply System (VCC = 5 V)
• Use CMOS Logic and connect VDD of CMOS logic with VCCO.
• The back-up battery works after CS goes high as V2 < V1.
• During tPO, memory access is prohibited.
• CS‘s threshold voltage V1 is determined by the following equation:
V1 = VF + (R1 + R2 + R3) × VSB/R3
When V1 is 4.45 V or less, connect 7 pin with VCC.
When V1 is 4.45 V or more, 7 pin can be used to open.
• The voltage to change V2 is provided as the following equation:
V2 = VF + (R1 + R2 + R3) × VSC/ (R2 + R3)
However, please set V2 to 3.5 V or more.
VCC
V1
V2
CS
VCCO
TPO
t
t
t
1
2
3
4
8
7
6
5
VCC
MB3771
R3: 56 kΩ
CT
R 2: 6.2 kΩ
R 1: 100 kΩ
R4 >1 kΩ
R 5: 100 kΩ
R 6: 100 kΩVCCO
CS
D1
V F 0.6 V
*: Diode has been added to prevent Comp.C from malfunctionig when VCC voltage is low.
Set V1 and V2 with care given to VF temperature characteristics (typically negative temperature
characteristics).
MB3771
15
■
■■
■TYPICAL CHARACTERISTICS
(Continued)
700
600
500
400
300
200
100
00 5 10 15 20
85°C
25°C
−40°C
85°C
−40°C
25°C
700
600
500
400
300
200
100
00 5 10 15 20
85°C
25°C
−40°C
85°C
5
4
3
2
1
0012345
Ta =
25°C−40°C
85°C4.0
−50 −25 0 25 50 75 100
4.1
4.2
4.3
4.4
4.5
VSAH
VSAL
1.20
−50 −25 0 25 50 75 100
1.25
1.30
VSBH
VSBL
1.20
−50 −25 0 25 50 75 100
1.25
1.30
−40°C
25°C
Ta =
Ta =
Power supply current ICC1 (µA)
Power supply current vs. power supply voltage Detection voltage (VSC) vs. anbient temperature
Power supply current vs. power supply voltage
Output (RESET) voltage vs. power supply voltage
Power supply voltage VCC (V)
Power supply voltage VCC (V)
Power supply voltage VCC (V)
Detection voltage VSC (V)
Detection voltage VSBH,VSBL (V)
Power supply current ICC2 (µA)
Output voltage VRESET (V)
Detection voltage VSAH,VSAL (V)
Anbient temperature Ta (°C)
Detection voltage (VSB) vs. anbient temperature
Anbient temperature Ta (°C)
Detection voltage (VSA) vs. anbient temperature
Anbient temperature Ta (°C)
MB3771
16
(Continued)
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
0 5 10 15 20
0 5 10 15 20
0102030 5040
0− 5−10 −15
5.0
4.5
4.0
1.5
1.0
0.5
0
2.0
1.0
0
1.0
0.5
0
10
1
100 m
10 m
1 m
100 µ
10 µ
1 µ10 p
100 p1000 p
0.01µ1 p 0.1 µ1 µ10 µ100 µ0 5 10 15 20
VSBH
VSC
VSBL Ta =
85°C
25°C
Ta =
− 40°C
Ta =
85°C
25°C
85°C
25°C
− 40°C
Ta =
85°C
− 40°C
− 40°C
− 40°C25°C
85°C
Ta =
25°C
Power supply voltage VCC (V)
Power supply voltage VCC (V)
Output current IRESET (µA)
Reset voltage (RESET) vs. output current
Detection voltage (VSB, VSC) vs. Power supply voltage
Output (RESET) voltage vs. output current
Output sink current IRESET (mA)
Output sink current IOUTC (mA)
Output voltage (OUTC) vs. output current
Output voltage VOHR (V)
Output voltage VOLR (V)
Output voltage VOLC (V)
Detection voltage VSC, VSBL,VSBH (V)
Reset hold time vs. power supply voltage (CT = 0.01µF)
CT pin capacitance vs. reset hold time
Reset hold time tPO (ms)
Reset hold time tPO (s)
CT pin capacitance CT (F)
MB3771
17
■
■■
■NOTES ON USE
• Take account of common impedance when designing the earth line on a printed wiring board.
• Take measures against static electricity.
- For semiconductors, use antistatic or conductive containers.
- When storing or carrying a printed circuit board after chip mounting, put it in a conductive bag or container.
- The work table, tools and measuring instruments must be grounded.
- The worker must put on a grounding device containing 250 kΩ to 1 MΩ resistors in series.
• Do not apply a negative voltage
- Applying a negative voltage of −0.3 V or less to an LSI may generate a parasitic transistor, resulting in
malfunction.
■
■■
■ORDERING INFORMATION
Part number Package Remarks
MB3771P 8-pin Plastic DIP
(DIP-8P-M01)
MB3771PS 8-pin Plastic SIP
(SIP-8P-M03)
MB3771PF 8-pin Plastic SOP
(FPT-8P-M01)
MB3771
18
■
■■
■PACKAGE DIMENSIONS
(Continued)
8-pin Plastic DIP
(DIP-8P-M01)
C
1994 FUJITSU LIMITED D08006S-2C-3
0.89 +0.35
–0.30
–0.30
+0.40
9.40
–0
0.99 1.52 +0.30
–0
+.014
–.012
.035
.370 –.012
+.016
.060 –0
+.012
+.012
–0
.039
4.36(.172)MAX
3.00(.118)MIN
2.54(.100)
TYP
0.46±0.08
(.018±.003)
0.25±0.05
(.010±.002)
0.51(.020)MIN
7.62(.300)
TYP
15°MAX
1 PIN INDEX 6.20±0.25
(.244±.010)
+0.30
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
MB3771
19
(Continued)
(Continued)
8-pin Plastic SIP
(SIP-8P-M03)
C
1994 FUJITSU LIMITED S08010S-3C-2
1.52 +0.30
–0
INDEX-1
INDEX-2
–0.35
+0.15
19.65
–0
+0.30
0.99
+.006
–.014
.774
.039 –0
+.012
+.012
–0
.060
2.54(.100)
TYP 0.50±0.08
(.020±.003)
4.00±0.30
(.157±.012)
8.20±0.30
(.323±.012)
6.20±0.25
(.244±.010)
(.128±.010)
3.26±0.25
0.25±0.05
(.010±.002)
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
MB3771
20
(Continued)
8-pin Plastic SOP
(FPT-8P-M01)
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.
C
2002 FUJITSU LIMITED F08002S-c-6-7
0.13(.005)
M
Details of "A" part
7.80±0.405.30±0.30
(.209±.012) (.307±.016)
.250
–.008
+.010
–0.20
+0.25
6.35
INDEX
1.27(.050)
0.10(.004)
14
58
0.47±0.08
(.019±.003)
–0.04
+0.03
0.17
.007
+.001
–.002
"A" 0.25(.010)
(Stand off)
0~8
˚
(Mounting height)
2.00
+0.25
–0.15
.079
+.010
–.006
0.50±0.20
(.020±.008)
0.60±0.15
(.024±.006)
0.10
+0.10
–0.05
–.002
+.004
.004
*
1
0.10(.004)
*
2
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
MB3771
FUJITSU LIMITED
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F0308
FUJITSU LIMITED Printed in Japan