Datasheet MB3771 Specification

FUJITSU SEMICONDUCTOR

DATA SHEET

ASSP For power supply applications

BIPOLAR

Power Supply Monitor

MB3771

DESCRIPTION

■

The Fujitsu MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary
voltage) in a microprocessor circuit, memory board in large-size computer, for example.
If the circuit’s po wer 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 external capacitor. The level of an arbitrary detection voltage is determined by two external
resistors. The MB3771 is av ailable in an 8-pin Dual In-Line, Single In-Line P ackage or space sa ving Flat Pac kage.

DS04-27400-11E

FEATURES

■

• Precision voltage detection (V

• User selectable threshold level with hysteresis (V

• 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 (V

• Minimal number of external components (one capacitor Min)

• Low power dissipation (I

• Detection threshold voltage has hysteresis function

• Reference voltage is connectable.

• One type of package (SOP-8pin : 1 type)

APPLICATION

■

• Industrial Equipment

• Arcade Amusement etc.

SA = 4.2 V ± 2.5 %)

= 0.8 V Typ)

CC

= 0.35 mA Typ, VCC = 5 V)

CC

= 1.23 V ± 1.5 %)

SB

Copyright©2003-2006 FUJITSU LIMITED All rights reserved

MB3771

V

D

PIN ASSIGNMENT

■

(TOP VIEW)

BLOCK DIAGRAM

■

CT

VSC

OUTC

GND

1

2

3

4

(FPT-8P-M01)

8

7

6

5

RESET

SA

V

VSB /RESIN

V

CC

CC

V

5

−

38

OUTC

≅ 1.24 V

2

VSC

+

4

GN

≅ 1.24 V

VSA

≅ 100 kΩ

7

≅ 40 kΩ

+

−

Comp. A

+

SB / RESIN

6

−

Comp. B

REFERENCE VOLTAGE

+

−

RSQ

1

CT

≅ 12 µA ≅ 10 µA

+

−

Comp. C

RESET

2

MB3771

V

t

t

FUNCTIONAL DESCRIPTIONS

■

Comparators Comp.A and Comp .B apply a h ysteresis to the detected voltage , so that when the voltage at either
the V

Comp. B ma y be used to detect any given v oltage(APPLICA TION CIRCUIT 3 : Arbitr ary Voltage Supply Monitor),
and can also be used as a forced reset pin (with reset hold time) with TTL input (APPLICATION CIRCUIT 6 :
5V Power Supply Monitor with forced RESET

Note that if Comp.B is not used, the V
Power Supply Monitor).

Instantaneous breaks or drops in the power supply can be detected as abnormal conditions by the MB3771
within a 2 µs interval. However because momentary breaks or drops of this duration do not cause problems in
actual systems in some cases, a delay ed trigger function can be created b y connecting capacitors to the V
V

or VSB pin falls below 1.23 V the RESET output signal goes to “low” level.

SA

input (VCC = 5 V) ).

pin should be connected to the VCC pin (APPLICATION CIRCUIT 1 : 5V

SB

pin (APPLICATION CIRCUIT 8 : Supply Voltage Monitoring with Delayed Trigger).

SB

SA

or

Because the RESET

output has built-in pull-up resistance, there is no need to connect to exter nal 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 (APPLICATION CIRCUIT
11 : Low V oltage and Over V oltage Detection (V
CIRCUIT 7 : 5 V Power Supply Monitor with Non-inverted RESET

= 5 V) ) and positive logic RESET signal output (APPLICATION

CC

), as well as for creating a reference voltage

(APPLICATION CIRCUIT 10 : Reference Voltage Generation and Voltage Sagging Detection).
Note that if Comp. C is not used, the V

pin should be connected to the GND pin (APPLICATION CIRCUIT 1 :

SC

5V Power Supply Monitor).

FUNCTION EXPLANATION

■

HYS

V

VS

VCC

RESET

0.8 V

PO

T

(1) (2) (3) (4) (5) (6) (7) (8)

TPO

CC

CT

1

8

2

7

3

6

4

5

RESET

(1) When VCC
(2) When V
(3) RESET

T

PO

(4) When V
(5) When V

In the case of voltage sagging, if the period from the time V
reaches V

rises to about 0.8V, RESET goes low.
reaches V

CC

S +VHYS

, CT then begins charging. RESET remains low during this time

goes high when CT begins charging.

:= CT × 10

5

(Refer to “CT

level drops lower then VS, then RESET goes low and CT starts discharging.

CC

level reaches VS + V

CC

+V

S

again, is longer than tPI, (as specified in the AC Characteristics), CT is discharged and

HYS

pin capacitance vs. reset hold time” in “TYPICAL CHARACTERISTICS”.)

, then CT starts charging.

HYS

goes lower than or equal to VS to the time VCC

CC

charged successively.

(6) After T

passes, and VCC level exceeds VS + V

PO

, then RESET goes high.

HYS

(7) Same as Point 4.
(8) RESET

remains low until VCC drops below 0.8V.

3

MB3771

ABSOLUTE MAXIMUM RATINGS

■

Parameter Symbol

Unit

Min Max

Rating

Power supply voltage V

V

Input voltage

V
V

Power dissipation P

CC

SA

SB

SC

D

−0.3 +20 V

−0.3 V

CC + 0.3 ( < +20) V

−0.3 +20 V

−0.3 +20 V
⎯ 200 (Ta ≤ 85 °C) mW

Storage temperature Tstg −55 +125 °C

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

Power supply voltage V

I

CC

RESET

Min Max

3.5 18 V
020mA

Value

Unit

Output current

I

OUTC

06mA

Operating ambient temperature Ta −40 +85 °C

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.

4

ELECTRICAL CHARACTERISTICS

■

1. DC Characteristics

Parameter Symbol Conditions

MB3771

= 5 V, Ta = + 25 °C)

(VCC

Value

Min Typ Max

Unit

Power supply current

I
I

V

(DOWN)

Detection voltage

SAH

V

Hysteresis width V

Detection voltage V

Deviation of detection voltage ∆V
Hysteresis width V

I

Input current

I

V

Output voltage

V

Output sink current I

RESET

CT charge current I

CC1

CC2

SAL

(UP)

HYSA

SB

SB

HYSB

IHB

ILB

OHR

OLR

CT

VSB = 5 V, VSC = 0 V ⎯ 350 500 µA
VSB = 0 V, V
V

CC

0 V ⎯ 400 600 µA

SC =

4.10 4.20 4.30 V

Ta = −40 °C to +85 °C 4.05 4.20 4.35 V

CC

V

4.20 4.30 4.40 V

Ta = −40 °C to +85 °C 4.15 4.30 4.45 V

⎯ 50 100 150 mV

V

SB

1.212 1.230 1.248 V
Ta = −40 °C to +85 °C 1.200 1.230 1.260 V
VCC = 3.5 V to 18 V ⎯ 310mV

⎯ 14 28 42 mV
VSB = 5 V ⎯ 0 250 nA
VSB = 0 V ⎯ 20 250 nA
I

= −5 µA, VSB = 5 V 4.5 4.9 ⎯ V

RESET

I

= 3mA, VSB = 0 V ⎯ 0.28 0.4 V

RESET

I

= 10mA, VSB = 0 V ⎯ 0.38 0.5 V

RESET

V

= 1.0 V, VSB = 0 V 20 40 ⎯ mA

OLR

VSB = 5 V, VCT = 0.5 V 9 12 16 µA

Input current

I
I

Detection voltage V

Deviation of detection voltage ∆V
Output leakage current I

OHC

Output voltage V
Output sink current I
Reset operation minimum

supply voltage

OUTC

V

IHC

ILC

OLC

CCL

SC

VSC = 5 V ⎯ 0 500 nA
VSC = 0 V ⎯ 50 500 nA

⎯ 1.225 1.245 1.265 V
Ta = −40 °C to +85 °C 1.205 1.245 1.285 V
VCC = 3.5 V to 18 V ⎯ 310mV

SC

V

= 18 V ⎯ 01 µA

OHC

I

= 4 mA, VSC = 5 V ⎯ 0.15 0.4 V

OUTC

V

= 1.0 V, VSC = 5 V 6 15 ⎯ mA

OLC

V

= 0.4 V, I

OLR

= 200 µA ⎯ 0.8 1.2 V

RESET

5

MB3771

2. AC Characteristics

Parameter

, VSB input pulse width t

V

SA

Reset hold time t

Symbol Conditions

PI

PO

⎯ 5.0 ⎯⎯µs
⎯ 0.5 1.0 1.5 ms

= 5 V, Ta = + 25 °C, CT = 0.01 µF)

(VCC

Value

Min Typ Max

Unit

RESET
RESET

rise time t
fall time t

Propagation delay time

*1: In case of V
*2: In case of V

termination.

SB

termination.

SC

t
t

t

PD

PHL

PLH

r

f

1

*

2

*

2

*

RL = 2.2 kΩ,
C

= 100 pF

L

RL = 2.2 kΩ,
C

= 100 pF

L

⎯⎯210 µs

⎯ 1.0 1.5 µs
⎯ 0.1 0.5 µs

⎯ 0.5 ⎯ µs
⎯ 1.0 ⎯ µs

6

APPLICATION CIRCUIT

■

1. 5V Power Supply Monitor

MB3771

Monitored by VSA. Detection threshold voltage is V

VCC

SAL

and V

SAH

MB3771

CT

1

2
3
4

8

7
6
5

RESET

Logic

circuit

2. 5V Power Supply Voltage Monitor (Externally Fine-Tuned Type)

The VSA detection voltage can be adjusted externally.
Resistance R

voltage can be set using the ratio between resistance R

•R

, R2 calculation formula (when R1 << 100 kΩ, R2 <<40 kΩ)

1

V

:= (R

SAL

and R2 are set sufficiently lower than the IC internal partial voltage resistance, so that the detection

1

and R2. (Refer to the table below).

1

1 + R2

) × V

SB /R2

[V], V

SAH

:= (R

1 + R2

) × (V

SB + VHYSB)

/ R2 [V]

1

(kΩ)R

R

2

(kΩ)

Detection voltage

: V

SAL

Detection voltage

(V)

10 3.9 4.37 4.47

9.1 3.9 4.11 4.20

V

CC

MB3771

1
2

C

T

3
4

8
7
6

5

RESET

R

1

Logic

R

Circuit

2

: V

SAH

(V)

7

MB3771

V

T

3. Arbitrary Voltage Supply Monitor

(1) Case: VCC ≤ 18 V

• Detection Voltage can be set by R
Detection Voltage = (R

+ R2) × VSB/R

1

• Connect Pin 7 to VCC when VCC less than 4.45 V.

• Pin 7 can be opened when V
Power Dissipation can be reduced.

and R2.

1

2

greater than 4.45 V

CC

Note : Hysteresis of 28 mV at V

Hysteresis width dose not depend on (R

at termination is available.

SB

1

VCC

+ R2).

MB3771

CT

(2) Monitoring V

CC

> 18 V

• Detection Voltage can be set by R
Detection Voltage = (R1 + R2) × VSB/R

1
2
3

4

and R

1

2

8
7
6

5

2

R

R2

1

RESET

• The RESET signal output is := 0V (low level) and := 5 V (high level). VCC voltage cannot be output.
Do not pull up RESET

• Changing the resistance ratio between R

to VCC.

and R5 changes the constant voltage output, thereby changing the

4

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 R

resistance level, caution should be given to the power consumption in the resistor. The tab le

3

below lists sample resistance values for reference (using 1/4 Ω resistance).

CC

(V)

V

Detection

voltage

(V)

RESET

Output min.

power supply v oltage (V)

1

(MΩ) R2 (kΩ) R3 (kΩ)

R

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

• Values are actual measured values (using I

= 100 µA, V

OUTC

= 0.4 V). Lowering the resistance value of R

OLC

3

reduces the minimum supply voltage of the RESET output, but requires resistance with higher allo wab le loss .

CC

3

R

5 V output(Stablized)

0.47 µF

1
2

3
4

8
7

6
5

RESE

R1

R2

CT

R4:

100 kΩ

R

5:

33 kΩ

8

MB3771

4. 5 V and 12 V Power Supply Monitor (2 types of power supply monitor V

CC1

= 5 V, V

• 5 V is monitored by VSA. Detection voltage is about 4.2 V

• 12 V is monitored by V

. When R1 = 390 kΩ and R2 = 62 kΩ, Detection voltage is about 9.0 V.Generally the

SB

detection voltage is determined by the following equation.
Detection Voltage = (R

+ R2) × VSB/R

1

VCC2

VCC1

2

MB3771

1

CT

2
3

4

5. 5 V and 12 V Po wer Suppl y Monitor (RESET signal is generated by 5 V, V

8
7

6
5

R

1: 390 kΩ

R2: 62 kΩ

RESET

Logic

circuit

CC1

= 5 V, V

• 5 V is monitored by VSA, and generates RESET signal when VSA detects voltage sagging.

• 12 V is monitored by V

, and generates its detection signal at OUTC.

SC

• The detection voltage of 12 V monitoring and its hysteresis is determined by the following equations.

+ R2 + R

Detection voltage =

1

R

R

2

+ R

3

× V

3

SC

(8.95 V in the circuit above)

CC2

=12 V)

CC2

= 12 V)

Hysteresis width =

V
V

CC2

CC1

R

(R3 − R3 // R4)

1

(R

+ R3) (R2 + R3 // R4)

2

1

: 390 kΩ

R

R

2

: 33 kΩ

R

4

: 510 kΩ

R

3

: 30 kΩ

× V

R

5

: 100 kΩ

SC

(200 mV in the circuit above)

L

: 10 kΩ

R

MB3771

1
2
3
4

C

T

8
7
6
5

RESET

or

IRQ

Port Logic Circuit

9

MB3771

6. 5 V Power Supply Monitor with forced RESET input (VCC = 5 V)

RESIN is an TTL compatible input.

RESIN

VCC

MB3771

1

2

C

T

3
4

8

7

6
5

RESET

Logic Circuit

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.

V

CC

RL: 10 kΩ

CT

RESET

MB3771

1
2
3
4

8
7

6
5

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 C

The formula for calculating the minimum value of the input pulse width [T
T

[µs] := 4 × 10-2 × C1 [pF]

PI

CC

V

10

1

5 V

4 V

= 1000 pF).

TP

CT

MB3771

1
2
3
4

] is:

PI

8
7
6
5

RESET

C1

MB3771

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 = V

SB

Example if VEE = −5 V, R4 = 91 kΩ

Then the detected voltage = −4.37 V

− V

× R4/R

SB

3

In cases where V

may be output when VCC is not output, it is necessary to use a Schottky barrier diode (SBD).

EE

V

CC

R5 : 5.1 kΩ

4

R

V

EE

0.22 µF

C

T

3

R
20 kΩ

SBD

:

MB3771

1

2

3

4

8

7

6

5

R

1

R

2

RESET

: 20 kΩ

: 20 kΩ

10. Reference Voltage Generation and Voltage Sagging Detection

(1) 9V Reference Voltage Generation and 5V/9V Monitoring

Detection Voltage = 7.2 V

In the above e xamples , the output v oltage and the detection v oltage are determined by the f ollowing equations:

Detection Voltage = (R

+ R2) × VSB/R

1

2

15 V

V

CC

: 5 V

R

5

: 3 kΩ

MB3771

8
7
6
5

3

:

R

7.5 kΩ

R

4

:

1.2 kΩ

RESET

9 V (≅ 50 mA)

R

1

: 300 kΩ

R

2

: 62 kΩ

0.47 µF

C

T

1
2
3

4

11

MB3771

T

G

T

(

(2) 5 V Reference Voltage Generation and 5V Monitoring (No.1)

Detection Voltage = 4.2 V

In the above e xamples , the output v oltage and the detection v oltage are determined by the f ollowing equations:

Output Voltage = (R

15 V

(3) 5 V Reference Voltage Generation and 5 V Monitoring (No. 2)

+ R4) × VSC/R

3

CT

0.47 µF

4

5 : 3 kΩ

R

MB3771

1
2
3

4

8
7
6
5

R

3 : 3.6 kΩ

4 : 1.2 kΩ

R

RESET

5 V(≅ 50 mA)

The value of R
R

, and the 5 V output current. The table below provides sample resistance values for reference.

3

should be calculated from the current consumption of the MB3771, the current flowing at R2 and

1

CC

(V) R1 (kΩ)

V

Output Current

40 11 < 1.6
24 6.2 < 1.4
15 4.7 < 0.6

V

CC

1

R

1

ND

8
7

2
3

6

4

C

T

R2 :
100 kΩ

3

: 33 kΩ

R

5

0.47 µF

RESE

5 V

(4) 1.245 V Reference Voltage Generation and 5 V Monitoring

Resistor R

determines Reference current. Using 1.2 kΩ as R1, reference current is about 2 mA.

1

(mA)

VCC

5 V)

GND

CT

0.47 µF

R

1 : 10 kΩ

1
2
3

4

8
7
6

5

RESE

Reference Voltage

1.245 V Typ

12

MB3771

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.

V

= (R1 + R2) × VSB/R

SL

VSH = (R3 + R4) × VSC/R

RESET

V

2

4

V

CC

R

R

3

1

MB3771

1
2

R

4

C

T

V

SL

V

SH

CC

3
4

8
7
6
5

RESET

R

2

12. Detection of Abnormal State of Power Supply System (VCC = 5 V)

• This Example circuit detects abnormal low/over v o ltage 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 V

CC

V

R1

MB3771

1
2

R

2

3
4

8
7
6
5

, and R1 and R2 respectively.

SA

LED

R3: 620 Ω

R

4:

1 kΩ to 100 kΩ

CLEAR

13

MB3771

V

13. Back-up Power Supply System (VCC = 5 V)

• Use CMOS Logic and connect VDD of CMOS logic with V

• The back-up battery works after CS goes high as V

• During t

• CS‘s threshold voltage V
V

= VF + (R1 + R2 + R3) × VSB/R

1

When V1 is 4.45 V or less, connect 7 pin with VCC.
When V

• The voltage to change V
V

= VF + (R1 + R2 + R3) × VSC/ (R2 + R3)

2

However, please set V

, memory access is prohibited.

PO

is determined by the following equation:

1

3

is 4.45 V or more, 7 pin can be used to open.

1

is provided as the following equation:

2

to 3.5 V or more.

2

VCC

V1
V2

CS

< V1.

2

CCO

.

t

TPO

t

CCO

t

CC

V

MB3771

1

C

T

2

3

4

8
7
6

5

R

3

: 56 kΩ

D

1

V

F

0.6 V

1

: 100 kΩ

R

R 2: 6.2 kΩ

4

>1 kΩ

R

R

5

: 100 kΩ

R

6

: 100 kΩ

V

CS

CCO

* : Diode has been added to prevent Comp.C from malfunctioning when VCC voltage is low.

Set V

and V2 with care given to VF temperature characteristics (typically negative temperature

1

characteristics).

14

TYPICAL CHARACTERISTICS

■

Power supply current (I

power supply voltage

700

A)

µ

(

600

CC1

500

400

300

200

100

0

Power supply current I

Ta =

+25°C

−40°C

+85°C

−40°C

+25°C

+85°C

0 5 10 15 20

Power supply voltage V

CC1

) vs.

CC

(V)

SC

Detection voltage (V

) vs.

Operating ambient temperature

1.30

(V)

SC

1.25

Detection voltage V

1.20

− 50 −25 0 +25 +50 +75 +100

Operating ambient temperature Ta (°C)

MB3771

Power supply current (I

power supply voltage

A)

700

µ

(

600

CC2

500

400

300

200

100

Power supply current I

Ta =

+85°C

−40°C

−40°C

+25°C

+85°C

0

0 5 10 15 20

Power supply voltage V

Output voltage (RESET

5

(V)

4

RESET

3

2

CC2

) vs.

+25°C

CC

(V)

) vs. power supply voltage

SB

Detection voltage (V

) vs.

Operating ambient temperature

(V)

1.30

SBL

,V

SBH

1.25

1.20

−50 −25 0 +25 +50 +75 +100

Detection voltage V

Operating ambient temperature Ta (°C)

Detection voltage (V

SA

) vs.

Operating ambient temperature

4.5

(V)

SAL

4.4

,V

SAH

4.3

4.2

SBH

V

VSBL

SAH

V

VSAL

Ta =

1

+25°C

+85°C

Output voltage V

0

0123 45

−40°C

Power supply voltage V

CC

(V)

4.1

4.0

−50 −25 0 +25 +50 +75 +100

Detection voltage V

Operating ambient temperature Ta (°C)

(Continued)

15

MB3771

(Continued)

Detection voltage (V

1.27

(V)

SBH

,V

SBL

, V

SC

1.26

1.25

1.24

1.23

1.22

1.21

1.20
0 5 10 15 20

SBH

V

V

SC

V

SBL

Power supply voltage VCC (V)

Detection voltage V

Reset hold time (tPO) vs.

power supply voltage (C

1.5

(ms)

PO

1.0

SB

, VSC) vs. Power supply voltage

T

= 0.01µF)

Ta =

− 40°C

+25°C

+85°C

Output voltage (V

5.0

OHR

) vs. output current

(V)

OHR

4.5

Output voltage V

4.0
0 − 5 −10 −15

Output current I

OLR

Output voltage (V

2.0

) vs. output sink current

Ta =

− 40°C

RESET

Ta =

+25°C

(µA)

− 40°C

(V)

OLR

1.0

+85°C

+85°C

0.5

Reset hold time t

0

0 5 10 15 20

Power supply voltage V

Reset hold time (t

10

1

(s)

PO

100 m

10 m

1 m

µ

100

10

µ

Reset hold time t

1

µ

10 p

1 p 0.1 µ1 µ10 µ100

PO

) vs. CT pin capacitance

Ta =

− 40°C

100 p 1000 p

+25°C

0.01

+85°C

µ

CT pin capacitance (F)

CC

(V)

+25°C

Output voltage V

0

0102030 5040

RESET

OLC

(mA)

) vs.

Output sink current I

Output voltage (V

output sink current

1.0

(V)

OLC

0.5

Output voltage V

µ

0

0 5 10 15 20

Output sink current I

Ta =

− 40°C
+25°C

OUTC

+85°C

(mA)

16

MB3771

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

MB3771PF-❏❏❏

MB3771PF-❏❏❏E1

RoHS Compliance Information of Lead (Pb) Free version

■

The LSI products of Fujitsu with “E1” are compliant with RoHS Directive , and has observed the standard of
lead, cadmium, mercury, Hexavalent chromium, polybrominated biphen yls (PBB) , and polybrominated diphenyl
ethers (PBDE) .

The product that conforms to this standard is added “E1” at the end of the part number.

MARKING FORMAT (Lead Free version)

■

Lead-Free version

8-pin Plastic SOP

(FPT-8P-M01)

8-pin Plastic SOP

(FPT-8P-M01)

Conventional version

Lead Free version

3771

E1XXXX

INDEX

XXX

17

MB3771

LABELING SAMPLE (Lead free version)

■

MB123456P - 789 - GE1

(3N) 1MB123456P-789-GE1

lead-free mark

JEITA logo JEDEC logo

1000

G

Pb

(3N)2 1561190005 107210

1,000

PCS

MB123456P - 789 - GE1

2006/03/01

MB123456P - 789 - GE1

1561190005

QC PASS

ASSEMBLED IN JAPAN

1/1

0605 - Z01A

Lead-Free version

1000

18

MB3771

MB3771PF-

■

E1 Recommended Conditions of Moisture Sensitivity Level

❏❏❏

Item Condition

Mounting Method IR (infrared reflow) , Manual soldering (partial heating method)

Mounting times 2 times

Before opening

Storage period

From opening to the 2nd

When the storage period after

opening was exceeded

Storage conditions 5 °C to

reflow

30 °C, 70%RH or less (the lowest possible humidity)

Please use it within two years after

Manufacture.

Less than 8 days

Please processes within 8 days

after baking (125 °C, 24H)

[Temperature Profile for FJ Standard IR Reflow]
(1) IR (infrared reflow)

H rank : 260 °C Max.

260 °C

255 °C

220 °C

170 °C

to

190 °C

RT

(a)

(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) Actual heating : Temperature 260 °C MAX; 255 °C or more, 10s or less
(d’) Main heating : Temperature 230 °C or more, 40s or less

Temperature 225 °C or more, 60s or less
Temperature 220 °C or more, 80s or less

(e) Cooling : Natural cooling or forced cooling

Note : Temperature : the top of the package body

(2) Manual soldering (partial heating method)

Conditions : Temperature 400 °C MAX

(b)

(c)

(d)

(d')

(e)

or
or

Times : 5 s max/pin

19

MB3771

PACKAGE DIMENSIONS

■

8-pin plastic SOP Lead pitch 1.27 mm

8-pin plastic SOP

(FPT-8P-M01)

1

6.35

*

(FPT-8P-M01)

+.010

+0.25

–.008

–0.20

.250

58

Package width

package length

×

5.3 × 6.35 mm

Lead shape Gullwing

Sealing method Plastic mold

Mounting height 2.25 mm MAX

Weight 0.10 g

Code

(Reference)

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.

0.17
.007

+0.03
–0.04

+.001
–.002

P-SOP8-5.3×6.35-1.27

14

1.27(.050)

C

2002 FUJITSU LIMITED F08002S-c-6-7

INDEX

0.10(.004)

0.10(.004)

2

*

(.209±.012) (.307±.016)

0.47±0.08

(.019±.003)

0.13(.005)

7.80±0.405.30±0.30

Details of "A" part

"A"

M

Dimensions in mm (inches).
Note: The values in parentheses are reference values.

2.00
.079

0.25(.010)

˚

0~8

0.50±0.20

(.020±.008)

0.60±0.15

(.024±.006)

+0.25
–0.15

(Mounting height)

+.010
–.006

+0.10

0.10

–0.05
+.004

–.002

.004

(Stand off)

20

MB3771

FUJITSU LIMITED

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, such as descriptions of function and application
circuit examples, in this document are presented solely for the
purpose of reference to show examples of operations and uses of
Fujitsu semiconductor device; Fujitsu does not warrant proper
operation of the device with respect to use based on such
information. When you develop equipment incorporating the
device based on such information, you must assume any
responsibility arising out of such use of the information. Fujitsu
assumes no liability for any damages whatsoever arising out of
the use of the information.
Any information in this document, including descriptions of
function and schematic diagrams, shall not be construed as license
of the use or exercise of any intellectual property right, such as
patent right or copyright, or any other right of Fujitsu or any third
party or does Fujitsu warrant non-infringement of any third-party’s
intellectual property right or other right by using such information.
Fujitsu assumes no liability for any infringement of the intellectual
property rights or other rights of third parties which would result
from the use of information contained herein.
The products described in this document are designed, developed
and manufactured as contemplated for general use, including
without limitation, ordinary industrial use, general office use,
personal use, and household use, but are not designed, developed
and manufactured as contemplated (1) for use accompanying fatal
risks or dangers that, unless extremely high safety is secured, could
have a serious effect to the public, and could lead directly to death,
personal injury, severe physical damage or other loss (i.e., nuclear
reaction control in nuclear facility, aircraft flight control, air traffic
control, mass transport control, medical life support system, missile
launch control in weapon system), or (2) for use requiring
extremely high reliability (i.e., submersible repeater and artificial
satellite).
Please note that Fujitsu will not be liable against you and/or any
third party for any claims or damages arising in connection with
above-mentioned uses of the products.
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.

Edited Business Promotion Dept.

F0605