74HC27 Philips, 74HC27 Datasheet - Page 5

• Manufacturer Part Number: 74HC27
• Description: Triple 3-input NOR gate
• Manufacturer: Philips

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
AC WAVEFORMS
PACKAGE OUTLINES
See
December 1990
CC
INPUT
nA, nB, nC
SYMBOL PARAMETER
t
t
PHL
THL
Fig.6 Waveforms showing the input (nA, nB, nC) to output (nY) propagation delays and the output transition times.
Triple 3-input NOR gate
(1) HC : V
category: SSI
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
/ t
/ t
TLH
PLH
HCT: V
M
M
r
propagation delay
output transition time
= 1.3 V; V
= t
nA, nB, nC to nY
= 50%; V
CC
UNIT LOAD COEFFICIENT
1.50
f
= 6 ns; C
per input, multiply this value by the unit load coefficient shown in the table below.
I
I
= GND to V
= GND to 3 V.
L
= 50 pF
CC
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
min.
12
7
typ.
25
CC
21
15
max. min.
) for a unit load of 1 is given in the family specifications.
.
T
74HCT
5
amb
40 to 85
( C)
26
19
max.
min. max.
40 to 125
32
22
.
ns
ns
UNIT
4.5
4.5
74HC/HCT27
V
TEST CONDITIONS
(V)
CC
Product specification
Fig.6
Fig.6
WAVEFORMS