74HC2G14 Datasheet, PDF (12/19 Pages) NXP Semiconductors – Inverting Schmitt-triggers

NXP Semiconductors
74HC2G14; 74HCT2G14
Dual inverting Schmitt trigger
2.0
I_CC
(mA)
1.0
mna031
3.0
I_CC
(mA)
2.0
1.0
mna032
0
0
2.5
V_I (V)
5.0
a. V_CC = 4.5 V.
Fig 10. Typical 74HCT2G14 transfer characteristics
0
0
b. V_CC = 5.5 V.
3.0
V_I (V)
6.0
16. Application information
The slow input rise and fall times cause additional power dissipation, this can be
calculated using the following formula:
P_add = f_i × (t_r × ∆I_CC(AV) + t_f × ∆I_CC(AV)) × V_CC where:
P_add = additional power dissipation (µW);
f_i = input frequency (MHz);
t_r = input rise time (ns); 10 % to 90 %;
t_f = input fall time (ns); 90 % to 10 %;
∆I_CC(AV) = average additional supply current (µA).
∆I_CC(AV) differs with positive or negative input transitions, as shown in Figure 11 and
Figure 12.
An example of a relaxation circuit using the 74HC2G14/74HCT2G14 is shown
in Figure 13.
74HC_HCT2G14_1
Product data sheet
Rev. 01 — 11 October 2006
© NXP B.V. 2006. All rights reserved.
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