MITSMI MM1099BF, MM1099AD, MM1099AF, MM1099AS, MM1099BD Datasheet
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MITSUMI
1432
8567
SOP-8C/DIP-8B
System Reset (Built-in Watch Dog Timer) MM1099
System Reset (Built-in Watch Dog Timer)
Monolithic IC MM1099
Outline
The function of this IC series MM1099 is to accurately reset systems, a generating reset signal at the time of
instantaneous supply voltage off or lowering in varied CPU and other logic system.
Further, with the watch dog timer built-in it can diagnose the operation of the system, intermittently
generating reset pulses when they operate erroneously to prevent runaway.
Features
1. Built-in watch dog timer
2. Low current consumption 130µA TYP.
3. Low operating threshold voltage V
4. Watch dog stop function (RCT terminal)
5. Long clock monitoring time
T
PR (POWER ON) : TWD (clock monitoring)=1 : 1
6. Fewer outer components
CC=0.8V
Package
DIP-8B (MM1099AD, MM1099BD)
SOP-8C (MM1099AF, MM1099BF)
SIP-8A (MM1099AS, MM1099BS)
Applications
1. Reset circuit for microcomputers, CPU and MPU.
2. Reset circuit for logic circuitry.
3. Monitoring of microcomputer system, etc.
Pin Assignmemt
1 TC
2 N.C
3 CK
4 GND
5 V
CC
13572468
1 TC
2 N.C
3 CK
4 GND
5 V
CC
6 RCT
7 V
8 RESET
S
-----------------------------------------------------------
SIP-8A
6 RCT
7 V
8 RESET
S
-----------------------------------------------------------
MITSUMI
Pin Description
System Reset (Built-in Watch Dog Timer) MM1099
Pin No.
Pin name
Variable terminals TWD, TWR and TPR TPR (mS) = 5000 CT (µF)
1 TC
The time for TWD, TWR and TPR to be TWD (mS) = 500 CT (µF)
determined by the external capacitor. T
2 N.C
3 CK
4 GND
5 V
6 RCT
7 V
8 RESET
Clock input terminal Inputs the clock from the logic system.
Ground terminal
CC
Voltage detection MM1099A 3.2V MM1099B 4.2V
Watchdog timer stop pin Operation modes: Operation OPEN, Stop connect to GND
S
Detect voltage variable terminal
Reset output pin (low output)
Absolute Maximum Ratings
Item Symbol Rating Units
Power supply voltage V
CK pin input voltage V
S pin input voltage VVS
V
Voltage applied to RCT pin V
Voltage applied to RESET
Allowable loss Pd 300 mW
Storage temperature T
----------------------------------------------------
CC max.
CK
RCT
pin VOH
STG
Function
WR(mS) = 100 CT (µF)
-
0.3~+10 V
-
0.3~VCC+0.3 (
-
0.3~VCC+0.3 (
-
0.3~VCC+0.3 (
-
0.3~VCC+0.3 (
-
40~+125
<
+10) V
=
<
+10) V
=
<
+10) V
=
<
+10) V
=
°
C
Recommended Operating Conditions
Item Symbol Rating Units
Power supply voltage V
----------------------------------------------------
RESET
sync current IOL 0~1.0 mA
Clock monitoring time setting T
Clock rise and fall times t
TC pin capacitance C
Operating temperature T
CC +2.2~+7.0 V
WD 0.1~1000 mS
FC, tRC <100 µS
T 0.0002~2 µF
OP
-
25~+75
°
C
MITSUMI
System Reset (Built-in Watch Dog Timer) MM1099
Electrical Characteristics (DC)
Item Symbol Measurement conditions Min. Typ. Max. Units
Consumption current
Detection voltage
Detection voltage temperature coefficient
Hysteresis voltage
CK input threshold V
CK input current
Output voltage MM1099A
(High) MM1099B 4.0 4.5
Output voltage (Low)
R output sync current I
MM1099A
CC During watchdog timer operation
I
MM1099B 130 195
MM1099A
V
MM1099B 4.05 4.20 4.35
MM1099A
V
MM1099B 4.15 4.30 4.45
VS/ T ±0.01 %/°C
MM1099A
HYS
V
MM1099B 50 100 150
I
I
V
OL1 I =0.5mA, VS=0V 0.2 0.4
V
OL2 I =1.0mA, VS=0V 0.3 0.5
V
OL V =1.0V, VS=0V 1 2 mA
(Except where noted otherwise, MM1099A : V
CC
=3.6V, Ta=25°C, MM1099B : VCC=5.0V)
(100) (150)
µA
SL
SH
VS=OPEN, VCC
VS=OPEN, VCC
3.10 3.20 3.30
3.15 3.25 3.35
25 50 100
VSH-VSL, VCC
TH 0.8 1.2 2 V
IH A : VCK=3.6V, B : VCK=5.0V 0 1
mV
µA
IL VCK=0V
OH
----------------------------------------------------
RESET
I=-1µA, VS=OPEN
----------------------------------------------------
RESET
----------------------------------------------------
RESET
----------------------------------------------------
RESET
-
12-6
3.0 3.4
-
2
V
V
V
T charge current
C
Minimum operating power
supply voltage to ensure RESET
---------------------------------------------------
I
CT1
I
CT2
CCL 0.8 1.0 V
V
VTC=1.0V during watchdog timer operation-0.16-0.24-0.48 µA
VTC=1.0V during power ON reset operation-0.16-0.24-0.48 µA
----------------------------------------------------
RESET
V =0.4V
----------------------------------------------------
RESET
I =0.1mA
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