M62008FP Datasheet PDF - Mitsubishi
| Part Number | M62008FP | |
| Description | LOW POWER 2 OUTPUT SYSTEM RESET IC SERIES | |
| Manufacturers | Mitsubishi | |
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MITSUBISHI<Dig.Ana.INTERFACE>
M62001L,FP/M62002L,FP/M62003L,FP/M62004L,FP/
M62005L,FP/M62006L,FP/M62007L,FP/M62008L,FP
LOW POWER 2 OUTPUT SYSTEM RESET IC SERIES
DESCRIPTION
The M62001~8 are semiconductor integrated circuits whose
optimum use is for the detection of the rise and fall in the
power supply to a microcomputer system in order to reset or
release the microcomputer system.
The M62001~8 carry out voltage detection in 2 steps and
have 2 output pins.As Bi-CMOS process and low power
dissipating circuits are employed,they output optimum signals
through each output pin to a system that requires RAM
backup, As output signals,interruption(INT) and compulsive
reset(RESET) signals are available.The interruption
signal(INT) is used to alter the microcomputer from normal
mode to backup mode and vice versa. these output signals are
classified into pulse type(M62001~M62004) and hold type
(M62005~M62008).
FEATURES
• Bi-CMOS process realizes a configuration of low current
dissipating circuits.
Circuit current
Icc=5µA(Typ.,normal mode,Vcc=5.0V)
Icc=1µA(Typ.,backup mode,Vcc=2.5V)
•Two-step detection of supply voltage
Detection voltage in normal mode (2 types)
Vs=4.45V/4.25V(Typ.)
Detection voltage in backup mode
VBATT=2.15V(Typ.)
•Two outputs
Reset output (RESET):Output of compulsive reset signal
Interruption output(INT):Output of interruption signal
•Two types of output forms:CMOS and open drain
•Two types of interruption output (INT) signals
Pulse type (M62001~M62004)
Hold type
(M62005~M62008)
•Two types of outline packages
5-pin plastic SIP (single in-line package)
8-pin plastic SOP (mini flat package)
•Output based on RAM backup mode (See the timing chart.)
PIN CONFIGURATION (TOP VIEW)
5 Vcc
4 Cd
3 RESET
2 INT
1 GND
Outline 5P5T(M62001L~8L)
RESET
Cd
Vcc
NC
1
2
3
4
8 INT
7 GND
6 NC
5 NC
Outline 8P2S-A(M62001FP~8FP)
NC:NO CONNECTION
APPLICATION
Prevention of malfunction of microcomputer systems in
electronic,equipment such as OA equipment, industrial
equipment,and home-use electronic appliances.
BLOCK DIAGRAM
Vcc
5
+
-
INTERRUPTION SIGNAL
GENERATION BLOCK
2 INT
+
-
RESET SIGNAL
GENERATION BLOCK
3 RESET
1
GND(GROUND PIN)
4
Cd(PIN TO DELAY CAPACITANCE)
NOTE:This is an example showing pin Nos.of M62001L~8L.(See PIN CONFIGURATION.)
MITSUBISHI
ELECTRIC
( 1 /6)
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MITSUBISHI<Dig.Ana.INTERFACE>
M62001L,FP/M62002L,FP/M62003L,FP/M62004L,FP/
M62005L,FP/M62006L,FP/M62007L,FP/M62008L,FP
LOW POWER 2 OUTPUT SYSTEM RESET IC SERIES
OPERATION PRINCIPLE
DESCRIPTION
In general,the memory backup function of
a microcomputer,as shown in figure,uses two diodes to switch
between main power supply and backup power supply.The
M62001~M62008 are ICs that,in such memory backup
operation,monitor in 2 steps each voltage on the VDD line.
VDD
Vcc
MAIN POWER
SUPPLY
BACKUP
POWER
SUPPLY
INT
RESET
M62001
INT
RESET
MICROCOMPUTER
SYSTEM
The ICs have an intelligent sequence such as substantial
hysteresis action of RESET toward normal state at restoration of
supply voltage,as well as 2-step detection in low power
dissipation mode.
OPERATION IN DETAIL
1.Two Step Detection
The ICs perform 2-step detection of supply voltage and have 2
output pins (INT and RESET).Although they have 2 comparators
for 2-step detection,they differ significantly from such that are
simply provided with independent detectors,because the RESET
output signal is dependent at power-up and the like upon the
INT output signal.
3.RESET Output (Detection of 2.15V)
The RESET outputs a signal to prevent the microcomputer from
malfunctioning due to a drop in supply voltage.
When powering up,RESET is kept at low level until the supply
voltage reaches VSH.If the supply voltage rises to VSH,RESET
is set to high level.By inserting a capacitor between the Cd pin
and GND,it is possible to produce a desired delay time (td).To
set a delay time,equation below is used.
td.=.1.52X105 XCd(sec)
Once the supply voltage has exceeded VSH and the RESET
output is set to high level,RESET maintains the high level until
the supply voltage drops to VBATT.When the supply voltage
drops to VBATT,RESET goes low thereby resetting and
initializing the microcomputer.
The RESET output has a large hysteresis voltage of
approximately 2V between the rise in supply voltage at power-
up and its fall.
RESET OUTPUT VOLTAGE VS.
SUPPLY VOLTAGE
5
4
3
2.INT output (Detection of 4.45V and 4.25V)
The INT output at the power-up of supply voltage detects VSH
(4.45V/4.25V)to inform the microcomputer system of the fact
that the supply voltage has reached its normal level.When the
supply voltage drops from its normal level to
VSL(4.45V/4.25V)an interruption signal is output to alter the
microcomputer system into RAM backup mode. The
microcomputer at this point enters sleep state and secures
memory by a stop command issued by the interruption
signal.These detection voltage ,VSH the rise,and VSL the fall,of
supply voltage,have a 100-mV hysteresis voltage between
themselves. VSH-VSL.=. 100(mV)
2
VBATT
1
VSH
0
23 4 5
SUPPLY VOLTAGE Vcc
INT OUTPUT VOLTAGE VS.
SUPPLY VOLTAGE
5
4
3
VSL VSH
2
1
0
4.0 4.2 4.4 4.6 4.8 5.0
SUPPLY VOLTAGE Vcc(V)
MITSUBISHI
ELECTRIC
( 5 /6)
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| Information | Total 6 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ M62008FP.PDF Datasheet ] | |
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