DM74LS156M

DM74LS156M Datasheet


DM74LS155<br>• DM74LS156 Dual 2-Line to 4-Line Decoders/Demultiplexers

Part Datasheet
DM74LS156M DM74LS156M DM74LS156M (pdf)
Related Parts Information
DM74LS155N DM74LS155N DM74LS155N
DM74LS156N DM74LS156N DM74LS156N
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DM74LS155
• DM74LS156 Dual 2-Line to 4-Line Decoders/Demultiplexers

DM74LS155
• DM74LS156 Dual 2-Line to 4-Line Decoders/Demultiplexers

These TTL circuits feature dual 1-line-to-4-line demultiplexers with individual strobes and common binary-address inputs in a single 16-pin package. When both sections are enabled by the strobes, the common address inputs sequentially select and route associated input data to the appropriate output of each section. The individual strobes permit activating or inhibiting each of the 4-bit sections as desired. Data applied to input C1 is inverted at its outputs and data applied at C2 is true through its outputs. The inverter following the C1 data input permits use as a 3-to-8line decoder, or 1-to-8-line demultiplexer, without external gating. Input clamping diodes are provided on these circuits to minimize transmission-line effects and simplify system design.
s Applications Dual 2-to-4-line decoder Dual 1-to-4-line demultiplexer 3-to-8-line decoder 1-to-8-line demultiplexer
s Individual strobes simplify cascading for decoding or demultiplexing larger words
s Input clamping diodes simplify system design s Choice of outputs:

Totem-pole DM74LS155 Open-collector DM74LS156
Ordering Code:

Order Number Package Number

Package Description

DM74LS155M

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74LS155N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide

DM74LS156M

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74LS156N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram
2000 Fairchild Semiconductor Corporation DS006395

DM74LS155
• DM74LS156

Function Tables
3-Line-to-8-Line Decoder or 1-Line-to-8-Line Demultiplexer

Inputs

Outputs

Select

Strobe Or Data

C Note 1 B A G Note 2
2-Line-to-4-Line Decoder or 1-Line-to-4-Line Demultiplexer

Select BA XX LL LH HL HH XX

Inputs Strobe

G1 H L X

Data C1 X H L

Outputs
1Y0 1Y1 1Y2

H = HIGH level L = LOW level X = don’t care

Note 1 C = inputs C1 and C2 connected together

Note 2 G = inputs G1 and G2 connected together

Select BA XX LL LH HL HH XX

Inputs Strobe

G2 H L X

Data C2 X L H

Outputs
2Y0 2Y1 2Y2 2Y3

Logic Diagram

DM74LS155
• DM74LS156

Absolute Maximum Ratings Note 3

Supply Voltage

Input Voltage

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range
−65°C to +150°C

Note 3 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

DM74LS155 Recommended Operating Conditions

VCC VIH VIL VOH IOL TA

Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature

Units

DM74LS155 Electrical Characteristics
More datasheets: C1131/28 1 | N5030L 17 | N5030L 1 | N1030 1 | 1131/31 M12-2202 | 814 | AP2501AMP-13 | 95-21SURC/S530-A3/TR9 | DM74LS155N | DM74LS156N


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Datasheet ID: DM74LS156M 513768