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U5020M-FP PDF Datasheet ( 特性, スペック, ピン接続図 )

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



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U5020M-FP Datasheet, U5020M-FP 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)

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