74HC91 데이터 시트보기 (PDF) - Philips Electronics
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74HC91 Datasheet PDF : 7 Pages
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Philips Semiconductors
Nine wide Schmitt trigger buffer;
open drain outputs; inverting
Product specification
74HC/HCT9114
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are given below.
Output capability: standard
ICC category: MSI
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
Tamb (°C)
SYMBOL PARAMETER
74HC
+25
−40 to +85
min. typ. max. min. max.
VT+
positive-going
threshold
0.70 1.13 1.50 0.70 1.50
1.75 2.37 3.15 1.75 3.15
2.30 3.11 4.20 2.30 4.20
VT−
negative-going
threshold
0.30 0.70 1.10 0.30 1.10
1.35 1.80 2.40 1.35 2.40
1.80 2.43 3.30 1.80 3.30
VH
hysteresis (VT+ − VT−) 0.2 0.43 0.80 0.18 0.80
0.4 0.57 1.00 0.40 1.00
0.5 0.68 1.10 0.50 1.10
−40 to +125
min.
0.70
1.75
2.30
0.30
1.35
1.80
0.15
0.40
0.50
max.
1.50
3.15
4.20
1.10
2.40
3.30
0.80
1.00
1.10
TEST CONDITIONS
UNIT
VCC
(V)
WAVEFORMS
V 2.0 Fig.6
4.5
6.0
V 2.0 Fig.6
4.5
6.0
V 2.0 Fig.6
4.5
6.0
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HC
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLZ propagation delay
An to Yn
tTHL
output transition time
36 110
140
165 ns 2.0 Fig.7
13 22
28
33
4.5
10 19
24
28
6.0
19 75
95
110 ns 2.0 Fig.7
7 15
19
22
4.5
6 13
16
19
6.0
December 1990
5
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