74HC1G14 Datasheet, PDF (9/14 Pages) NXP Semiconductors – Inverting Schmitt-trigger

NXP Semiconductors
74HC1G14; 74HCT1G14
Inverting Schmitt trigger
200
∆I_CC(AV)
(µA)
150
100
t_f = 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 14 and 15.
74HC1G14 and 74HCT1G14 used in relaxation oscillator circuit, see Figure 16.
Remark: All values given are typical unless otherwise specified.
mna036
positive-going
edge
200
∆I_CC(AV)
(µA)
150
100
mna058
positive-going
edge
50
negative-going
50
edge
negative-going
edge
0
0
2.0
4.0
6.0
V_CC (V)
0
0
2
4 _{VCC (V)} 6
Fig 14. ∆I_CC(AV) for 74HC1G14 devices; linear change of Fig 15. ∆I_CC(AV) for 74HCT1G14 devices; linear change
V_I between 0.1 × V_CC to 0.9 × V_CC
of V_I between 0.1 × V_CC to 0.9 × V_CC
R
C
mna035
For 74HC1G14: f = _T-¹-- ≈ ₀---_.--₈----_×-¹----_R----_C---
For 74HCT1G14: f = _T-¹-- ≈ ₀---_.--₆---₇---¹-_×-----_R----_C---
Fig 16. Relaxation oscillator using 74HC1G14 and 74HCT1G14
74HC_HCT1G14_4
Product data sheet
Rev. 04 — 17 July 2007
© NXP B.V. 2007. All rights reserved.
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