Datenblatt-pdf.com


ELM409 Schematic ( PDF Datasheet ) - ELM

Teilenummer ELM409
Beschreibung Versatile Debounce Circuit
Hersteller ELM
Logo ELM Logo 




Gesamt 8 Seiten
ELM409 Datasheet, Funktion
ELM409
Versatile Debounce Circuit
Description
The ELM409 is digital filter circuit that is used to
interface mechanical contacts to electronic circuits.
All mechanical contacts, whether from switches,
relays, etc. will have inherent ‘bounce’ when they
make or break a connection. When that contact is
used for the electrical input to a digital circuit, the
bounces can easily be incorrectly interpreted as
multiple inputs. The ELM409 contains all of the logic
that is typically required to remove the bounce from
such signals, and provide a signal that has only one
transition.
In addition to providing the standard debounce
function, the ELM409 may also be configured for
other useful functions such as generating pulses or
alternating output levels on signal transitions.
No external components are needed for the
operation of the ELM409, as all timing and logic
functions are performed internally.
Applications
• Pushbutton interface for logic circuits
• Limit switch monitoring
• Time delay generation
• Power on sequencing
Features
• Standard and extra long debounce times
• Schmitt input provides hysteresis
• Complementary circuit outputs
• Needs no external timing components
• Low power CMOS design - typically 1 mA at 5V
• Wide supply range - 3.0 to 5.5 volt operation
• High current drive outputs
Connection Diagram
PDIP and SOIC
(top view)
VDD 1
A2
B3
C4
8 VSS
7 Out
6 Out
5 In
Block Diagram
In 5
ABC
234
Control Logic
500 msec
debounce
edge
detectors
pulse
generator
25 msec
debounce
edge
detectors
toggle
circuit
7 Out
6 Out
ELM409DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
1 of 8
Free Datasheet http://www.datasheet4u.com/






ELM409 Datasheet, Funktion
ELM409 Operation (continued)
The following diagrams provide a pictorial view of
each of the eight ELM409 options:
Input
(pin 5)
ABC = 000 or 001
Output
(pin 7)
ABC = 010 or 011
Output
(pin 7)
ABC = 100 or 101
Output
(pin 7)
ABC = 110
Output
(pin 7)
ABC = 111
Output
(pin 7)
25 msec or 500 msec
50 msec
25 msec or 500 msec
25 msec or 500 msec
50 msec
25 msec or 500 msec
25 msec or 500 msec
Figure 5. ELM409 Timing Diagrams
ELM409
ELM409DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
6 of 8
Free Datasheet http://www.datasheet4u.com/

6 Page







SeitenGesamt 8 Seiten
PDF Download[ ELM409 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
ELM401Rotary Encoder Debounce CircuitELM
ELM
ELM402Rotary DecoderELM
ELM
ELM403Rotary DecoderELM
ELM
ELM404Rotary DecoderELM
ELM
ELM405Rotary DecoderELM
ELM

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche