DM74LS253N

DM74LS253N Datasheet

DM74LS253 3-STATE Data Selector/Multiplexer

Part	Datasheet
DM74LS253N	DM74LS253N (pdf)

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DM74LS253 3-STATE Data Selector/Multiplexer DM74LS253 3-STATE Data Selector/Multiplexer Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully complementary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections. The 3-STATE outputs can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled at a high impedance state , the low impedance of the single enabled output will drive the bus line to a HIGH or LOW logic level. s 3-STATE version of DM74LS153 with same pinout s Schottky-diode-clamped transistors s Permit multiplexing from N-lines to one line s Performs parallel-to-serial conversion s Strobe/output control s High fanout totem-pole outputs s Typical propagation delay Data to output 12 ns Select to output 21 ns s Typical power dissipation 35 mW Ordering Code: Order Number Package Number Package Description DM74LS253M M16A 16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow DM74LS253N 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 Function Table Select Data Inputs Output Inputs Control B A C0 C1 C2 C3 G L X XX L H X XX L H X L XX L H X H XX H L X LX H L X HX H X XL H X XH Address Inputs A and B are common to both sections. H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance OFF Output Y Z L H L H L H L H 2000 Fairchild Semiconductor Corporation DS006416 DM74LS253 Logic Diagram DM74LS253 Absolute Maximum Ratings Note 1 Supply Voltage Input Voltage Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C Note 1 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” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions VCC VIH VIL IOH 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 Electrical Characteristics over recommended operating free air temperature range unless otherwise noted Parameter Conditions Input Clamp Voltage VCC = Min, II = −18 mA HIGH Level

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DM74LS253 3-STATE Data Selector/Multiplexer

DM74LS253 3-STATE Data Selector/Multiplexer

Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully complementary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections.

The 3-STATE outputs can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled at a high impedance state , the low impedance of the single enabled output will drive the bus line to a HIGH or LOW logic level.
s 3-STATE version of DM74LS153 with same pinout s Schottky-diode-clamped transistors s Permit multiplexing from N-lines to one line s Performs parallel-to-serial conversion s Strobe/output control s High fanout totem-pole outputs s Typical propagation delay

Data to output 12 ns Select to output 21 ns s Typical power dissipation 35 mW
Ordering Code:

Order Number Package Number

Package Description

DM74LS253M

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

DM74LS253N

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

Function Table

Select

Data Inputs

Output

Inputs

Control

B A C0 C1 C2 C3 G

L X XX

L H X XX

L H X L XX

L H X H XX

H L X LX

H L X HX

H X XL

H X XH

Address Inputs A and B are common to both sections. H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance OFF

Output

Y Z L H L H L H L H
2000 Fairchild Semiconductor Corporation DS006416

DM74LS253

Logic Diagram

DM74LS253

Absolute Maximum Ratings Note 1

Supply Voltage

Input Voltage

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

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

Note 1 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” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

VCC VIH VIL IOH 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

Electrical Characteristics
over recommended operating free air temperature range unless otherwise noted

Parameter

Conditions

Input Clamp Voltage

VCC = Min, II = −18 mA

HIGH Level

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Datasheet ID: DM74LS253N 513784