Date: November 16, 1999 Sheet 1 of 1
Size Document Number REV
A3 (C) 1995 - 1999 SC12APL1 01
Title
IPC@CHIP SC12 PIN17-PFAIL/RES-OUT
Garbenheimer Strasse 38
Germany - 35578 Wetzlar
IPC GmbH
VCCVCC VCCVCC
o
1N4007
1N4148
5VDC
DC Power supply
Main
Supply
VPFAIL
32
Vcc
200E 1N4148
3
2
1
8
4
U1A
LM393
LINK & TRAFFIC LED
2,5V
VREF=
1K
LM385 100nF 20K
** R1
RES-OUT
1K
VCC
5
6
7
8
4
U1B
LM393
20K
10K
VCC
@CHIP
17
GND
0,8V = RES active
1,2V = NMI active
16
* CAP
This is an Analog-Comparator-Input that activates NMI.
PFAIL = Power Fail is used to monitor main supply voltage, not main Vcc+5VDC.
RES-OUT = LOW active Reset Out to any external Logik.
* CAP = Value is dependent from the saveable amount of data.
** R1 = 20000 *
VPFAIL - 0,7V
2,5V
- 1
Gepr.: JW 15.11.99
Gez. : IB 16.11.99
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