749014 查看數據表（PDF） - Philips Electronics
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749014 Datasheet PDF : 7 Pages
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Philips Semiconductors
Nine wide Schmitt trigger buffer/line driver;
inverting
Product specification
74HC/HCT9014
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are given below.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
An
0.3
TRANSFER CHARACTERISTICS FOR 74HCT
Voltages are referred to GND (ground = 0 V)
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HCT
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
VT+
positive-going threshold 0.9 1.50 2.0 0.9 2.0 0.9 2.0 V 4.5 Figs 6 and 7
1.2 1.70 2.1 1.2 2.1 1.2 2.1
5.5
VT−
negative-going threshold 0.7 1.06 1.4 0.7 1.4 0.7 1.4 V 4.5 Figs 6 and 7
0.8 1.27 1.7 0.8 1.7 0.8 2.7
5.5
VH
hysteresis (VT+ − VT−)
0.2 0.44 0.8 0.2 0.8 0.2 0.8 V
4.5 Figs 6 and 7
0.2 0.44 0.8 0.2 0.8 0.2 0.8
5.5
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
+25
typ. max.
74HCT
−40 to +85
min. max.
−40 to +125
min. max.
UNIT
VCC
(V)
WAVEFORMS
tPHL/ tPLH propagation delay
An to Yn
19 32
40
tTHL/ tTLH output transition time
7 15
19
48 ns 4.5 Fig.8
22 ns 4.5 Fig.8
December 1990
6
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