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U5020M の電気的特性と機能

U5020MのメーカーはTEMIC Semiconductorsです、この部品の機能は「Digital Window Watchdog Timer」です。


製品の詳細 ( Datasheet PDF )

部品番号 U5020M
部品説明 Digital Window Watchdog Timer
メーカ TEMIC Semiconductors
ロゴ TEMIC Semiconductors ロゴ 




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U5020M Datasheet, U5020M PDF,ピン配置, 機能
Digital Window Watchdog Timer
U5020M
Description
The digital window watchdog timer, U5020M, is a CMOS
integrated circuit. In application where safety is critical,
it is especially important to monitor the microcontroller.
Normal microcontroller operation is indicated by a cycli-
cally transmitted trigger signal, which is received by a
window watchdog timer within a defined time window. A
missing or a wrong trigger signal makes the watchdog
timer reset the microcontroller. The IC is tailored for
microcontrollers which can work in both full-power and
sleep mode. With an additional voltage monitoring
(power-on reset and supply voltage drop reset) U5020M
offers a complete monitoring solution for microsystems
in automotive and industrial applications.
Features
D Low current consumption: IDD < 100 mA
D RC–oscillator
D Internal reset during power-up and supply voltage
drops (POR)
D “Short” trigger window for active mode
“long” trigger window for sleep mode
D Cyclical wake-up of microcontroller in sleep mode
D Trigger input
D Six wake-up inputs
D Reset output
D Enable output
Ordering Information
Extended Type Number
U5020M–FP
Block Diagram
Package
SO16
C
R1 VDD 10 nF
VDD
OSC 15
RC
13
C1 Oscillator
Reset 10
OSC
Remarks
95 10387
Input ts 16
mC OSC
State machine
9
External
Trigger 11 Input signal
switching
Enable circuitry
conditioning
Mode 12
Power–on
POR reset
POR Test logic
Wake up 3–8
14
GND
21
Test Test
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A3, 27-Feb-97
Preliminary Information
1 (8)

1 Page





U5020M pdf, ピン配列
U5020M
1000.00
100.00
t (ms)
10.00
1.00
1
C1 = 500 pF
10 100
R1 (kW)
Figure 3. Period t vs. R1, @ C1 = 500 pF
4.5 V
5.0 V
5.5 V
1000
95 10636
VDD
Reset Out
Mode
Pin 13
to t6
Pin 10
t1
Figure 4. Power-up reset and mode switchover
Pin 12
95 10637
Supply Voltage Monitoring, Pin 10
The integrated power-on reset (POR) circuitry sets the
internal logic to a defined basic status and generates a
reset pulse at the reset output, Pin 10, during ramp-up of
the supply voltage and in the case of voltage drops of the
supply. A hysteresis in the POR threshold prevents the
circuit from oscillating. During ramp–up of the supply
voltage the reset output stays active for time, to, in order
to bring the microcontroller in its defined reset status (see
figure 4). Pin 10 has an open-drain output.
Switch-over Mode Time, Pin 12
The switch-over mode time enables the synchronous
operation of micro and watchdog. After the power-up
reset time the watchdog has to be switched to its
monitoring mode by the micro with a “low” signal
transmitted to the mode pin (Pin 12) within the time out
period, t1,. If the low signal does not occur within time,
t1, (see figure 4) the watchdog generates a reset pulse, t6,
and the time, t1, starts again. Micro and watchdog are
synchronized with the switchover mode time, t1, each
time a reset pulse is generated.
Microcontroller in Active Mode
Monitoring with the “Short” Trigger
Window
After the switch-over mode the watchdog works in the
short watchdog mode and expects a trigger pulse from the
microcontroller within the defined time window, t3,
(enable time). The watchdog generates a reset pulse
which resets the microcontroller if
D the trigger pulse duration is too long,
D the trigger pulse is within the disable time, t2
D there is no trigger pulse
Figure 5 shows the pulse diagram with a missing trigger
pulse.
TELEFUNKEN Semiconductors
Rev. A3, 27-Feb-97
Preliminary Information
3 (8)


3Pages


U5020M 電子部品, 半導体
U5020M
Electrical Characteristics
VDD = 5 V; Tamb = 25 °C; reference point is ground (Pin14); figure 4, unless otherwise specified
Parameters
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSupply voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁCurrent consumption
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower-on reset
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower-on reset
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower-on reset
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInputs
Upper threshold (“1”)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLower threshold (“0”)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInput voltage range
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInput current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOutput Pin 9
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMax. output current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁUpper output voltage (“1”)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLower output voltage (“0”)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOutput Pin 10
Max. output current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLower output voltage (“0”)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTiming
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebounce period
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDebounce period
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMax. trigger pulse period
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower-up reset time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTime out period
Short disable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁShort enable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLong disable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLong enable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLong disable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLong enable time
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁReset out time
Test Conditions / Pins Symbol
WR1 = 66 k
Pin 13
Pin 13
VDD
IDD
Logic functions Pin 13
Threshold
Pin 13
Hysteresis
Pin 13
Pins 3 to 8, 11, 12 and 16
VDD
VPOR
Vhys
VIH
VIL
VIN
Depending on pin
I IN
IOUT = 1mA
IOUT = –1mA
IOUT
VOH
VOL
IOUT = –1mA
IOUT
VOL
Trig, Mode, Pins 11 and 12
Wake-up 1–6, Pins 3 to 8
Input switch = low (0)
Pin 16
Input switch = low (0)
Pin 16
Input switch = high (1)
Pin 16
Input switch = high (1)
Pin 16
to
t1
t2
t3
t4
t5
t4
t5
t6
Min.
4.5
1
4.0
–0.4
–20
2
4.5
2
3
96
Typ. Max. Unit
5.5 V
m100 A
V
3.8 V
100 mV
1.0
VDD + 0.2
20
V
V
V
mA
mA
V
0.5 V
mA
0.5 V
45
201
1112
130
124
71970
30002
1200
400
40
4
128
cyc
cyc
cyc
cyc
cyc
cyc
cyc
cyc
cyc
cyc
cyc
cyc
6 (8) TELEFUNKEN Semiconductors
Preliminary Information
Rev. A3, 27-Feb-97

6 Page



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共有リンク

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部品番号部品説明メーカ
U5020M

Digital Window Watchdog Timer

TEMIC Semiconductors
TEMIC Semiconductors
U5020M-FP

Digital Window Watchdog Timer

TEMIC Semiconductors
TEMIC Semiconductors


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