74HC14 Datasheet, PDF (5/8 Pages) NXP Semiconductors – Hex inverting Schmitt trigger

Philips Semiconductors
Hex inverting Schmitt trigger
Product specification
74HC/HCT14
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Transfer characteristics are
given below.
Output capability: standard
I_CC category: SSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
nA
0.3
Transfer characteristics for 74HCT
Voltages are referenced to GND (ground = 0 V)
SYMBOL PARAMETER
T_amb (°C)
74HCT
+25
−40 to +85
min. typ. max. min. max.
−40 to +125
min. max.
UNIT
TEST CONDITIONS
V_CC
(V)
WAVEFORMS
V_T+
positive-going
1.2 1.41 1.9 1.2 1.9 1.2 1.9 V
4.5 Figs 6 and 7
threshold
1.4 1.59 2.1 1.4 2.1 1.4 2.1
5.5
V_T−
negative-going
0.5 0.85 1.2 0.5 1.2 0.5 1.2 V
4.5 Figs 6 and 7
threshold
0.6 0.99 1.4 0.6 1.4 0.6 1.4
5.5
V_H
hysteresis
(V_T+ −V_T−)
0.4 0.56 −
0.4 −
0.4 −
V
4.5 Figs 6 and 7
0.4 0.60 −
0.4 −
0.4 −
5.5
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
SYMBOL PARAMETER
74HCT
+25
−40 to +85
min. typ. max. min. max.
t_PHL/ t_PLH propagation delay
20 34
43
nA, to nY
t_THL/ t_TLH output transition
7 15
19
time
−40 to +125
min. max.
51
22
UNIT
ns
ns
TEST CONDITIONS
V_CC
(V)
WAVEFORMS
4.5 Fig.8
4.5 Fig.8
September 1993
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