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參數資料
| 型號： | KK74HC138AN |
| 廠商： | KODENSHI CORP. |
| 英文描述： | Replacement for Texas Instruments part number SN74LS20N. Buy from authorized manufacturer Rochester Electronics. |
| 中文描述： | 1 - 8解碼器/解復用器 |
| 文件頁數： | 1/6頁 |
| 文件大?。?/td> | 176K |
| 代理商： | KK74HC138AN |
TECHNICAL DATA
K K
74HC138A
1-of-8 Decoder/Demultiplexer
ORDERING INFORMATION
KK
74HC138AN Plastic
KK
74HC138AD SOIC
T
A
= -55
°
to 125
°
C for all packages
The
KK
74HC138A is identical in pinout to the LS/ALS138. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
The
KK
74HC138A decodes a three-bit Address to one-of-eight active-
low outputs. This device features three Chip Select inputs, two active-low
and one active-high to facilitate the demultiplexing, cascading, and chip-
selecting functions. The demultiplexing function is accomplished by using
the Address inputs to select the desired device output; one of the Chip
Selects is used as a data input while the other Chip Selects are held in
their active states.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
μ
A
High Noise Immunity Characteristic of CMOS Devices
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
CS1 CS2 CS3
A2 A1 A0
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X X H
X H X
L X X
X X X
X X X
X X X
H H H H H H H H
H H H H H H H H
H H H H H H H H
H L L
H L L
H L L
H L L
L L L
L L H
L H L
L H H
L H H H H H H H
H L H H H H H H
H H L H H H H H
H H H L H H H H
H L L
H L L
H L L
H L L
H L L
H L H
H H L
H H H
H H H H L H H H
H H H H H L H H
H H H H H H L H
H H H H H H H L
H = high level (steady state)
L = low level (steady state)
X = don’t care
1
相關PDF資料 |
PDF描述 |
|---|---|
| KK74HC139A | Replacement for Texas Instruments part number SN74LS21N. Buy from authorized manufacturer Rochester Electronics. |
| KK74HC139AD | Dual 1-of-4 Decoder/Demultiplexer |
| KK74HC139AN | Dual 1-of-4 Decoder/Demultiplexer |
| KK74HC14A | Replacement for Texas Instruments part number 54AC11011/BEA. Buy from authorized manufacturer Rochester Electronics. |
| KK74HC14AD | Replacement for Texas Instruments part number 54AC11011/BFA. Buy from authorized manufacturer Rochester Electronics. |
相關代理商/技術參數 |
參數描述 |
|---|---|
| KK74HC139A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Dual 1-of-4 Decoder/Demultiplexer |
| KK74HC139AD | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Dual 1-of-4 Decoder/Demultiplexer |
| KK74HC139AN | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Dual 1-of-4 Decoder/Demultiplexer |
| KK74HC14A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Hex Schmitt-Trigger Inverter |
| KK74HC14AD | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Hex Schmitt-Trigger Inverter |
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