74HCU04U Ver la hoja de datos (PDF) - Philips Electronics

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74HCU04U

Hex inverter

Philips Electronics 

Philips Semiconductors

Hex inverter

Product specification

74HCU04

Fig.10 Test set-up for measuring forward

transconductance gfs = dio/dvi at vo is constant

(see also graph Fig.11).

APPLICATION INFORMATION

Some applications for the “HCU04” are:

• Linear amplifier (see Fig.12)

• In crystal oscillator designs (see Fig.13)

• Astable multivibrator (see Fig.14)

Fig.11 Typical forward transconductance gfs as a

function of the supply voltage VCC at

Tamb = 25°C.

ZL > 10 kΩ; AOL = 20 (typ.)

Au = –-1----+-----RR----------12-----A--(--O-1---L-+-----A-----O---L---)--;

VO max (p-p) ≈ VCC −2 V centered at 1⁄2VCC

3 kΩ ≤ R1, R2 ≤ 1 MΩ

Typical unity gain bandwidth product is 5 MHz.

CI (see Fig.15)

AOL = open loop amplification

Au = voltage amplification

Fig.12 HCU04 used as a linear amplifier.

September 1993

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