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IN74LS161 の電気的特性と機能

IN74LS161のメーカーはIK Semiconductorです、この部品の機能は「4-Bit Binary Counter」です。


製品の詳細 ( Datasheet PDF )

部品番号 IN74LS161
部品説明 4-Bit Binary Counter
メーカ IK Semiconductor
ロゴ IK Semiconductor ロゴ 




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IN74LS161 Datasheet, IN74LS161 PDF,ピン配置, 機能
TECHNICAL DATA
Synchronous 4 Bit Counters; Binary,
Direct Reset
IN74LS161
This synchronous, presettable counter features an internal carry look-
ahead for application in high-speed counting designs. Synchronous
operation is provided by having all flip-flops clocked simultaneously so
that the outputs change conicident with each other when so instructed by
the count-enable inputs and internal gating.
This mode of operation eliminates the output counting spikes that are
normally associated with asynchronous (ripple clock) counters. A buffered
clock input triggers the four flip-flops on the rising (positive-going) edge
of the clock input wave form.
This counter is fully programmable; that is the outputs may be preset
to either level. As presetting is synchronous setting up a low level at the
load input disables the counter and causes the outputs to agree with the
setup data after the next clock pulse regardless of the levels of the enable
inputs.
The carry look-ahead circuitry provides for cascading counters for n-
bit synchronous applications without additional gating. Instrumental in
accomplishiing this function are two counter-enable inputs and a ripple
carry output. Both countenable inputs (ENABLE P and ENABLE T)
must be high to count, and ENABLE T is fed forward to enable the
ripple carry output. The ripple carry output thus enabled will produce a
high-level output pulse with a duration approximately equal to the high
level portion of the QA output. The high-level overflow ripple carry
pulse can be enable successive cascaded stages. Transitions at the
ENPor ENT are allowed regardless of the level of the clock input.
ORDERING INFORMATION
IN74LS161N Plastic
IN74LS161D SOIC
TA = 0° to 70° C for all packages
PIN ASSIGNMENT
Internal Look-Ahead for Fast Counting
Carry Output for n-Bit Cascading
Synchronous Counting
Synchronously Programmable
Load Control Line
Diode-Clamped Inputs
LOGIC DIAGRAM
www.datasheet4u.com
PIN 16 =VCC
PIN 8 = GND
1

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IN74LS161 pdf, ピン配列
IN74LS161
DC ELECTRICAL CHARACTERISTICS over full operating conditions
Guaranteed Limit
Symbol
Parameter
Test Conditions
Min Max Unit
VIK Input Clamp Voltage
VCC = min, IIN = -18 mA
-1.5 V
VOH High Level Output Voltage VCC = min, IOH = -0.4 mA
2.7
V
VOL Low Level Output Voltage VCC = min, IOL = 4 mA
0.4 V
VCC = min, IOL = 8 mA
0.5
IIH High Level Input Current VCC = max Data or enable P
20 µA
VIN =2.7 V Load, clock or
enable T
40
Reset
20
VCC = max Data or enable P
0.1 mA
VIN =7.0 V Load, clock or
enable T
0.2
Reset
0.1
IIL Low Level Input Current VCC = max Data or enable P
-0.4 mA
VIN =0.4 V
Load, clock or
enable T
Reset
-0.8
IO Output Short Circuit Current VCC = max, VO = 0 V
(Note 1)
-20 -100 mA
ICC Supply All outputs high VCC = max (Note 2)
Current
31 mA
All outputs low VCC = max (Note 3)
32
Note 1: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 2: ICCH is measured with the load high, then again with the load low, with all other inputs high and all outputs
open.
Note 3: ICCL is measured with the clock input high, then again with the clock input low, with all other inputs low and all
outputs open.
3


3Pages


IN74LS161 電子部品, 半導体
IN74LS161
N SUFFIX PLASTIC DIP
(MS - 001BB)
A
16 9
B
18
FL
C
-T- SEATING
PLANE
N
G
KM
D
H
NOTES:
0.25 (0.010) M T
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
J
Symbol
A
B
C
D
F
G
H
J
K
L
M
N
Dimension, mm
MIN MAX
18.67 19.69
6.1 7.11
5.33
0.36 0.56
1.14 1.78
2.54
7.62
0° 10°
2.92 3.81
7.62 8.26
0.2 0.36
0.38
D SUFFIX SOIC
(MS - 012AC)
A
16 9
H BP
1G
8
C
R x 45
-T-
D
SEATING
K PLANE
0.25 (0.010) M T C M
J
F
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B 0.25 mm (0.010) per side.
Symbol
A
B
C
D
F
G
MH
J
K
M
P
R
Dimension, mm
MIN MAX
9.8 10
3.8 4
1.35 1.75
0.33 0.51
0.4 1.27
1.27
5.72
0° 8°
0.1 0.25
0.19 0.25
5.8 6.2
0.25 0.5
6

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
IN74LS161

4-Bit Binary Counter

IK Semiconductor
IK Semiconductor
IN74LS164

8-Bit Parallel-Out Shift Register

IK Semiconductor
IK Semiconductor


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