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參數(shù)資料
| 型號(hào)： | SN74AHCT161 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-Bit Synchronous Binary Counters(4位二進(jìn)制同步計(jì)數(shù)器) |
| 中文描述： | 4位同步二進(jìn)制計(jì)數(shù)器（4位二進(jìn)制同步計(jì)數(shù)器） |
| 文件頁(yè)數(shù)： | 6/10頁(yè) |
| 文件大小： | 224K |
| 代理商： | SN74AHCT161 |
SN54AHCT161, SN74AHCT161
4-BIT SYNCHRONOUS BINARY COUNTERS
SCLS368A – MAY 1997 – REVISED JUNE 1997
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range
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
113
°
C/W
131
°
C/W
78
°
C/W
149
°
C/W
–65
°
C to 150
°
C
recommended operating conditions (see Note 3)
SN54AHCT161
MIN
SN74AHCT161
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
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
°
C
TYP
SN54AHCT161
SN74AHCT161
UNIT
MIN
4.4
MAX
MIN
4.4
MAX
MIN
4.4
MAX
VOH
IOH = –50 A
IOH = –8 mA
IOL = 50 A
IOL = 8 mA
VI = VCC or GND
VI = VCC or GND,
One input at 3.4 V,
Other inputs at VCC or GND
VI = VCC or GND
4 5 V
4.5 V
4.5
V
3.94
3.8
3.8
VOL
4 5 V
4.5 V
0.1
0.1
0.1
V
0.36
±
0.1
0.44
±
1
40
0.44
±
1
40
II
ICC
5.5 V
A
IO = 0
5.5 V
4
A
ICC
5.5 V
1.35
1.5
1.5
mA
Ci
5 V
2
10
10
pF
This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.
P
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