www.elektronik.si

[amper]

Pozdravljeni
Mene pa zanima zakaj ima IC CD4009 dvojno napajalno napetost. Na nožici 1 Vcc in na nožici 16 Vdd.

LP

[dkone]

Kopirano iz datasheeta:


These hex buffers are monolithic complementary MOS
(CMOS) integrated circuits. The N- and P-channel enhancement
mode transistors provide a symmetrical circuit with
output swings essentially equal to the supply voltage. This
results in high noise immunity over a wide supply voltage
range. No DC power other than that caused by leakage current
is consumed during static conditions. All inputs are protected
against static discharge. These gates may be used
as hex buffers, CMOS to DTL or TTL interface or as CMOS
current drivers. Conversion ranges are from 3V to 15V providing

Connect VCC to DTL or TTL supply.
Connect VDD to COS/MOS supply.

Vcc je za TTL nivoje (5V)
Vdd pa za CMOS (15V)

Naj me kdo popravi...

[jur]

Chip lahko deluje kot logic level converter iz CMOS na TTL. To pomeni, da na vhod pripelješ napetost ki ni samo od 0 - 5 voltov, ampak od 0 do 20. Del elektronike napajaš z napetostjo, ki jo konvertiraš v TTL. Nikakor pa napajanje ni negativno! Negativnega je dovoljeno le do -0.5 volta. Če je bolj negativno, bo scvrlo chip.

Jur

[amper]

a moram potem na oba priključiti 12v če želim imeti na izhodu 12v

[Roadracer]

[aly]

Prebereš Datasheet, ali po domače RTFM!

[.]

Brisana vsebina odstranjenega uporabnika.