Watchdog Timer. M5295AP Datasheet

M5295AP Timer. Datasheet pdf. Equivalent

M5295AP Datasheet
Recommendation M5295AP Datasheet
Part M5295AP
Description Watchdog Timer
Feature M5295AP; M5295AL/AP/AFP Watchdog Timer REJ03D0780-0200 Rev.2.00 Jun 15, 2007 Description M5295A is a semicond.
Manufacture Renesas
Datasheet
Download M5295AP Datasheet




Renesas M5295AP
M5295AL/AP/AFP
Watchdog Timer
REJ03D0780-0200
Rev.2.00
Jun 15, 2007
Description
M5295A is a semiconductor integrated circuit which is designed for system reset to detect +5 V power supply.
This IC keeps the operation microcomputer watching. When the system is abnormal, it generates reset output until the
system returns to normal states of the system.
It is possible to vary the two detective voltage by connecting the resistor, so it is suitable to high quality and high
performance system.
Features
Watchdog timer
Power on reset timer
Low circuit current: 0.8 mA (Typ, VCC = 5 V)
Wide supply voltage range: VCC(max) = 15 V
Application
Microcomputer system
Recommended Operating Condition
Supply voltage range: 4 V to 15 V
Rated supply voltage: 5 V
Block Diagram
F.F
F.F
+
+
W.D.T
F.F
49.6k
+
20.4k
51.2k
+
18.8k
1.24V
Reference voltage
generator circuit
20k 30k
1
WD
2
TC
3
RST1
4
GND
5
ADJ1
678
VCC
RST2
ADJ2
REJ03D0780-0200 Rev.2.00 Jun 15, 2007
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Renesas M5295AP
M5295AL/AP/AFP
Pin Arrangement
M5295AL
8 ADJ2
7 RST2
6 VCC
5 ADJ1
4 GND
3 RST1
2 TC
1 WD
(Top view)
Outline: PRSS0008AA-A (8P5) [AL]
M5295AP
M5295AFP
WD 1
8 ADJ2
TC 2
7 RST2
RST1 3
GND 4
6 VCC
5 ADJ1
(Top view)
Outline: PRDP0008AA-A (8P4) [AP]
PRSP0008DE-C [AFP] (recommend)
PRSP0008DA-A (8P2S-A) [AFP] (not recommend for new design)
REJ03D0780-0200 Rev.2.00 Jun 15, 2007
Page 2 of 12



Renesas M5295AP
M5295AL/AP/AFP
Absolute Maximum Ratings
Item
Supply voltage
Input voltage
Output voltage
Output current
Power dissipation
Thermal derating
Operating temperature
Storage temperature
Symbol
VCC
VIN
VOUT
IOUT
Pd
Kθ
Topr
Tstg
(Ta = 25°C, unless otherwise noted)
Ratings
Unit
15 V
–10 to +10
15
V
V
10 mA
800(AL)/625(AP)/440(AFP)
mW
8.0(AL)/6.25(AP)/4.4(AFP)
mW/°C
–20 to +75
–55 to +125
°C
°C
Electrical Characteristics
DC Characteristics
Item
WD input current
WD input voltage
TC output current
TC input current
Threshold voltage of
watchdog timer
Output voltage
Output leakage current
VCC detective voltage (1)
VCC detective voltage (2)
ADJ1 voltage
ADJ2 voltage
RST1 on voltage
RST2 on voltage
Circuit current
Symbol
IIH
IIL
VIH
VIL
IOUT
IIN
VTH3(H)
VTH3(L)
VOL
Ileak
VTH1
VTH2(H)
VTH2(L)
VTH2
V5
V8
RST1
RST2
ICC
Min
0.06
–0.05
2
3.7
1.7
4.05
4.5
4.45
0.05
1.17
1.07
Typ
0.15
–0.1
3.3
4
2
0.1
4.25
4.7
4.6
0.1
1.46
1.34
0.8
(Ta = 25°C, unless otherwise noted)
Max
0.25
–0.15
0.8
–1
4.3
2.3
0.5
5
4.45
4.9
4.75
0.2
1.75
1.61
0.5
0.5
1.5
Unit
mA
V
Test Conditions
Pin
WD VIN = 5V
VIN = –5V
WD
µA TC VIN = 1.5V
mA TC VOUT = 4.2V
V TC
V RST1 IOUT = 1mA
µA RST2 VOUT = 15V
V VCC
V VCC
V ADJ1
V ADJ2
V RST1 VCC = 1.2V, RL = 4.7k
V RST2 VCC = 1.2V, RL = 4.7k
mA VCC
DC Characteristics
Test Conditions
Item
Symbol
Min
Typ
Max Unit Pin
Watchdog timer
TWD
— 1.1CR1
s RST1
0.5 1.1 1.7 ms
C = 0.1µF, R1 = 10k
Reset timer (1)
tRST(1)
— 0.5CR1
s RST1
0.2 0.5 1.1 ms
C = 0.1µF, R1 = 10k
Reset timer (2)
tRST(2)
— 830C —
s RST1 R1 = 10k
40 83 220 µs
C = 0.1µF, R1 = 10k
Input pulse watch
tWDIN
3 — — µs WD
Transmittal delay time
td1
— 20 — µs RST1
td2 — 10 —
RST2
REJ03D0780-0200 Rev.2.00 Jun 15, 2007
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