74HC14; 74HCT14
NXP Semiconductors
Hex inverting Schmitt trigger
11. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; CL = 50 pF; for test circuit see Figure 7.
Symbol Parameter
Conditions
Tamb = 25 C
Tamb = 40 C to Unit
+125 C
Min
Typ
Max
Max
Max
(85 C) (125 C)
74HC14
[1]
tpd
propagation delay nA to nY; see Figure 6
VCC = 2.0 V
-
-
-
-
41
15
12
12
125
25
-
155
31
-
190
38
-
ns
ns
ns
ns
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
21
26
32
[2]
tt
transition time
see Figure 6
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
-
-
19
7
75
15
13
-
95
19
15
-
110
22
19
-
ns
ns
ns
pF
6
[3]
[1]
CPD
power dissipation per package; VI = GND to VCC
capacitance
7
74HCT14
tpd
propagation delay nA to nY; see Figure 6
VCC = 4.5 V
-
-
-
-
20
17
7
34
-
43
-
51
-
ns
ns
ns
pF
VCC = 5.0 V; CL = 15 pF
[2]
[3]
tt
transition time
power dissipation per package;
capacitance VI = GND to VCC 1.5 V
VCC = 4.5 V; see Figure 6
15
-
19
-
22
-
CPD
8
[1] tpd is the same as tPHL and tPLH
.
[2] tt is the same as tTHL and tTLH
.
[3] CPD is used to determine the dynamic power dissipation (PD in W):
PD = CPD VCC2 fi N + (CL VCC2 fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CL VCC2 fo) = sum of outputs.
74HC_HCT14
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 19 September 2012
6 of 21
NXP [ NXP ]
