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参数资料
| 型号： | SN74LS156DR2 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | LS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO16 |
| 封装： | SOIC-16 |
| 文件页数： | 2/4页 |
| 文件大小： | 78K |
| 代理商： | SN74LS156DR2 |
5-2
FAST AND LS TTL DATA
SN54/74LS155
SN54/74LS156
LOGIC DIAGRAM
Ea Ea
A0
A1
EbEb
O0a
O1a
O2a
O3a
O0b
O1b
O2b
O3b
14
12
6
7
3
4
5
9
11
12
10
13
15
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
FUNCTIONAL DESCRIPTION
The LS155 and LS156 are Dual 1-of-4 Decoder/Demulti-
plexers with common Address inputs and separate gated
Enable inputs. When enabled, each decoder section accepts
the binary weighted Address inputs (A0, A1) and provides four
mutually exclusive active LOW outputs (O0–O3). If the Enable
requirements of each decoder are not met, all outputs of that
decoder are HIGH.
Each decoder section has a 2-input enable gate. The
enable gate for Decoder “a” requires one active HIGH input
and one active LOW input (EaEa). In demultiplexing applica-
tions, Decoder “a” can accept either true or complemented
data by using the Ea or Ea inputs respectively. The enable gate
for Decoder “b” requires two active LOW inputs (EbEb). The
LS155 or LS156 can be used as a 1-of-8 Decoder/Demulti-
plexer by tying Ea to Eb and relabeling the common connection
as (A2). The other Eb and Ea are connected together to form
the common enable.
The LS155 and LS156 can be used to generate all four
minterms of two variables. These four minterms are useful in
some applications replacing multiple gate functions as shown
in Fig. a. The LS156 has the further advantage of being able to
AND the minterm functions by tying outputs together. Any
number of terms can be wired-AND as shown below.
f = (E + A0 + A1) (E + A0 + A1) (E + A0 + A1)
(E + A0 + A1)
where E = Ea + Ea; E = Eb + Eb
Figure a
E
A0
A1
E
A0
A1
E
A0
A1
E
A0
A1
O0
O1
O2
O3
E
A0
A1
E
A0
A1
E
A0
A1
E
A0
A1
O0
O1
O2
O3
TRUTH TABLE
ADDRESS
ENABLE “a”
OUTPUT “a”
ENABLE “b”
OUTPUT “b”
A0
A1
Ea
O0
O1
O2
O3
Eb
O0
O1
O2
O3
X
L
X
H
X
H
X
XX
HH
H
X
HH
H
L
LH
LL
HH
H
L
LL
HH
H
LH
H
L
LH
H
L
HH
LH
HL
H
L
LH
HL
H
L
H
L
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
相关PDF资料 |
PDF描述 |
|---|---|
| SN74LS156JS | LS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, CDIP16 |
| SN74LS157NDS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| SN74LS157NS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| SN74LS157JS | LS SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDIP16 |
| SN74LS162AN | LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDIP16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS156DRE4 | 功能描述:编码器、解码器、复用器和解复用器 Dual 2 to 4-Line Decoder/DeMltplxr RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS156DRG4 | 功能描述:编码器、解码器、复用器和解复用器 Dual 2Ln To 4Ln Decodr Demultiplexer RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS156N | 功能描述:编码器、解码器、复用器和解复用器 Dual 2 to 4-Line Decoder/DeMltplxr RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS156N | 制造商:Texas Instruments 功能描述:Logic - Demultiplexer IC |
| SN74LS156N3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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