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SN74LS155 の電気的特性と機能

SN74LS155のメーカーはON Semiconductorです、この部品の機能は「DUAL 1-OF-4 DECODER / DEMULTIPLEXER」です。


製品の詳細 ( Datasheet PDF )

部品番号 SN74LS155
部品説明 DUAL 1-OF-4 DECODER / DEMULTIPLEXER
メーカ ON Semiconductor
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SN74LS155 Datasheet, SN74LS155 PDF,ピン配置, 機能
SN74LS155
DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
The SN54 / 74LS156 is a high speed Dual 1-of-4
Decoder/Demultiplexer. This device has two decoders with common
2-bit Address inputs and separate gated Enable inputs. Decoder “a”
has an Enable gate with one active HIGH and one active LOW input.
Decoder “b” has two active LOW Enable inputs. If the Enable
functions are satisfied, one output of each decoder will be LOW as
selected by the address inputs. The LS156 has open collector outputs
for wired-OR (DOT-AND) decoding and function generator
applications.
The LS156 is fabricated with the Schottky barrier diode process for
high speed and are completely compatible with all Motorola TTL
families.
Schottky Process for High Speed
Multifunction Capability
Common Address Inputs
True or Complement Data Demultiplexing
Input Clamp Diodes Limit High Speed Termination Effects
ESD > 3500 Volts
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC Eb Eb A0 O3b O2b O1b O0b
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts (Connection
Diagram) as the Dual In-Line Pack-
age.
1 2 3 4 56 78
Ea Ea A1 O3a O2a O1a O0a GND
http://onsemi.com
DUAL 1-OF-4 DECODER/
DEMULTIPLEXER
LS156-OPEN-COLLECTOR
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
PIN NAMES
LOADING (Note a)
HIGH
LOW
A0, A1
Ea, Eb
Ea
O0 O3
Address Inputs
Enable (Active LOW) Inputs
Enable (Active HIGH) Input
Active LOW Outputs (Note b)
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges. The HIGH level drive for the LS156 must be established by an
external resistor.
© Semiconductor Components Industries, LLC, 2006
June, 2006 Rev. 7
1
1 2 13 3 14 15
E
DECODER a
012
A0
A1
3
A0 E
A1 DECODER b
0 123
765 4
9 10 11 12
VCC = PIN 16
GND = PIN 8
Publication Order Number:
SN74LS155/D
http://www.Datasheet4U.com

1 Page





SN74LS155 pdf, ピン配列
SN74LS155
SN54 / 74LS156
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC Supply Voltage
TA Operating Ambient Temperature Range
VOH Output Voltage — High
IOL Output Current — Low
Min Typ Max Unit
54 4.5 5.0 5.5
74 4.75 5.0 5.25
V
54 55 25 125 °C
74 0 25 70
54, 74
5.5 V
54 4.0 mA
74 8.0
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
VIH
Parameter
Input HIGH Voltage
Min Typ Max Unit
Test Conditions
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
54
VIL Input LOW Voltage 74
0.7
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage
0.65 1.5 V VCC = MIN, IIN = 18 mA
IOH
Output HIGH Current
54, 74
100 μA VCC = MIN, VOH = MAX
54, 74
VOL
Output LOW Voltage
74
0.25 0.4
0.35 0.5
V IOL = 4.0 mA
V IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IIH Input HIGH Current
IIL Input LOW Current
ICC Power Supply Current
20 μA VCC = MAX, VIN = 2.7 V
0.1 mA VCC = MAX, VIN = 7.0 V
0.4 mA VCC = MAX, VIN = 0.4 V
10 mA VCC = MAX
AC CHARACTERISTICS (TA = 25°C)
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay
Address, Ea or Eb to Output
Propagation Delay
Address to Output
Propagation Delay
Ea to Output
Limits
Min Typ Max
25 40
34 51
31 46
34 51
32 48
32 48
Unit
ns
ns
ns
Test Conditions
Figure 1
Figure 2
Figure 1
VCC = 5.0 V
CL = 15 pF
RL = 2.0 kΩ
VIN
VOUT
AC WAVEFORMS
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 1
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 2
http://onsemi.com
3
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共有リンク

Link :


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