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DM74LS253

Features: · TRI-STATE version of LS153 with same pinout· Schottky-diode-clamped transistors· Permit multiplexing from N-lines to one line· Performs parallel-to-serial conversion· Strobe/output control· High fanout totem-pole outputs· Typical propagation delay Data to output 12 ns Select to output ...

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SeekIC No. : 004327234 Detail

DM74LS253: Features: · TRI-STATE version of LS153 with same pinout· Schottky-diode-clamped transistors· Permit multiplexing from N-lines to one line· Performs parallel-to-serial conversion· Strobe/output contr...

DM74LS253 Data Sheet

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Part Number:
DM74LS253
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· TRI-STATE version of LS153 with same pinout
· Schottky-diode-clamped transistors
· Permit multiplexing from N-lines to one line
· Performs parallel-to-serial conversion
· Strobe/output control
· High fanout totem-pole outputs
· Typical propagation delay
    Data to output 12 ns
    Select to output 21 ns
·Typical power dissipation 35 mW
· Alternate Military/Aerospace device (54LS253) is available.
   Contact a National Semiconductor Sales Office/Distributor for specifications


Specifications

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage ..................................................7V
Input Voltage ....................................................7V
Operating Free Air Temperature Range
DM54LS and 54LS......................... -55 to a125
DM74LS ..............................................0 to a70
Storage Temperature Range .........-65 to a150

Note: 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 haracteristics'' table are not guaranteed at the absolute maximum ratings. The "Recommended Operating onditions'' table will define the conditions for actual device operation.


Description

Each of these DM74LS253 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 TRI-STATE outputs of DM74LS253 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.




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