HD74HC131
3-to-8-line Decoder/Demultiplexer with Edge-Triggered
Address Registers
核农学报Description
The HD74HC131 is 3-to-8 linedecoder. It has Address select inputs (A,B,C) and D type register. Address select data store to D type registers, during the positive going transition of the clock pulse.
Output control (G
1, G
2
) are independent of select input and CLK input, and when G
1
is low or G
2
= High,
all outputs is high.
Features
• High Speed Operation: t pd (CLK to Y) = 20 ns typ (C L = 50 pF)• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: V CC = 2 V to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I CC (static) = 4 µA max (Ta = 25°C)
HD74HC131
2
Function Table
Inputs Enable Select Outputs CLK G1G 2C B A Y 0Y 1Y 2Y 3Y 4Y 5Y 6Y 7X X H X X X H H H H H H H H X
L X X X X H H H H H H H H
L
H
L
X
X
X
Outputs corresponding to stored address, L; all others H
Pin Arrangement
HD74HC131 Logic Diagram
3
HD74HC131
4
DC Characteristics
Ta = 25°C
Ta = –40 to +85°C
Item Symbol V CC (V)Min Typ Max Min
Max Unit Test Conditions
赛尔号洛拉斯克
Input voltage
V IH
2.0 1.5—— 1.5—V
热解焚烧炉
4.5 3.15—— 3.15—6.0
4.2—— 4.2—V IL
2.0——0.5—0.5V 4.5—— 1.35—
1.356.0
—
—
1.8
— 1.8Output voltage
V OH
2.0 1.9 2.0— 1.9—V
Vin = V IH or V IL I OH = –20 µA
4.5 4.4 4.5— 4.4—6.0
5.9
6.0— 5.9—4.5 4.18—— 4.13—I OH = –4 mA 6.0
5.68——
5.63—I OH = –5.2 mA
V OL
2.0—0.00.1—0.1V
Vin = V IH or V IL I OL = 20 µA
4.5—0.00.1—0.16.0—0.00.1—
0.14.5——0.26—0.33I OL = 4 mA 6.0
——0.26—0.33I OL = 5.2 mA
Input current Iin 6.0——±0.1—±1.0µA Vin = V CC or GND
Quiescent supply current
I CC
6.0
oec管理模式
—
—
4.0
—
40
µA
Vin = V CC or GND, Iout = 0 µA
HD74HC131
5
AC Characteristics (C L = 50 pF, Input t r = t f = 6 ns)
Ta = 25°C
Ta = –40 to +85°C
Item Symbol V CC (V)Min Typ Max Min
Max Unit Test Conditions Propagation delay t PLH
2.0——210—265ns
CLK to Y
time
t PHL 4.5—2042—536.0——36—45t PLH 2.0——140—
175ns
G 1 or G 2 to Y
t PHL
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采取了哪些行动
4.5—1528—356.0——24—30Pulse widtht w
2.080——100—ns 4.5165—20—6.0
14——17—Setup time
t su
2.050——65—ns 4.5102—13—6.0
9——11—Hold time
辽宁同志t h
2.05——5—ns 4.55–1—5—6.0
5——5—Output rise/fall t TLH 2.0——75—95ns time
t THL 4.5—515—196.0——13—16Input capacitance
Cin
—
—
5
10
—
10
pF
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