參數(shù)資料
型號(hào): SN74AHCT27
廠商: Texas Instruments, Inc.
英文描述: Triple 3-Input Positive-NOR Gates(三3輸入正或非門)
中文描述: 三3輸入正和或非門(三3輸入正或非門)
文件頁(yè)數(shù): 2/5頁(yè)
文件大?。?/td> 104K
代理商: SN74AHCT27
SN54AHCT27, SN74AHCT27
TRIPLE 3-INPUT POSITIVE-NOR GATES
SCLS364 – MAY 1997
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram, each gate (positive logic)
A
B
C
Y
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range, V
I
(see Note 1)
Output voltage range, V
O
(see Note 1)
Input clamp current, I
IK
(V
I
< 0)
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
)
Continuous output current, I
O
(V
O
= 0 to V
CC
)
Continuous current through V
CC
or GND
Package thermal impedance,
θ
JA
(see Note 2): D package
–0.5 V to 7 V
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DB package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–0.5 V to V
CC
+ 0.5 V
–20 mA
±
20 mA
±
25 mA
±
50 mA
127
°
C/W
158
°
C/W
78
°
C/W
170
°
C/W
–65
°
C to 150
°
C
recommended operating conditions (see Note 3)
SN54AHCT27
MIN
SN74AHCT27
MIN
UNIT
MAX
MAX
VCC
VIH
VIL
VI
VO
IOH
IOL
t/
v
TA
NOTE 3: Unused inputs must be held high or low to prevent them from floating.
Supply voltage
4.5
5.5
4.5
5.5
V
High-level input voltage
2
2
V
Low-level input voltage
0.8
0.8
V
Input voltage
0
5.5
0
5.5
V
Output voltage
0
VCC
–8
0
VCC
–8
V
High-level output current
mA
Low-level output current
8
8
mA
Input transition rise or fall rate
20
20
ns/V
°
C
Operating free-air temperature
–55
125
–40
85
P
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