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CD54HC157

Features: • Common Select Inputs• Separate Enable Inputs• Buffered inputs and Outputs• Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads• Wide Operating Tempera...

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SeekIC No. : 004311629 Detail

CD54HC157: Features: • Common Select Inputs• Separate Enable Inputs• Buffered inputs and Outputs• Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LST...

CD54HC157 Data Sheet

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Part Number:
CD54HC157
Supply Ability:
5000

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Product Details

Description



Features:

• Common Select Inputs
• Separate Enable Inputs
• Buffered inputs and Outputs
• Fanout (Over Temperature Range)
   - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
   - Bus Driver Outputs  . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range  . . . -55to 125
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
   - 2V to 6V Operation
   - High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V
• HCT Types
   - 4.5V to 5.5V Operation
   - Direct LSTTL Input Logic Compatibility,VIL= 0.8V (Max), VIH = 2V (Min)
   - CMOS Input Compatibility, Il 1µA at VOL, VOH


Pinout

Connection Diagram


Specifications

DC Supply Voltage, VCC   . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to 7V
DC Input Diode Current, IIK
  For VI < -0.5V or VI > VCC + 0.5V  . . . . . . . . . . . . . . . . . . . . . ±20mA
DC Output Diode Current, IOK
  For VO < -0.5V or VO > VCC + 0.5V   . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Source or Sink Current per Output Pin, IO
  For VO > -0.5V or VO < VCC + 0.5V  . . . . . . . . . . . . . . . . . . . . ±25mA
DC VCC or Ground Current, ICC or IGND  . . . . . . . . . . . . . . . . . .±50mA


Description

The 'HC157, 'HCT157, 'HC158, and 'HCT158 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active Low. When (E) is High, all of the outputs in the 158, the inverting type, (1Y-4Y) are forced High and in the 157, the non-inverting type, all of the outputs (1Y-4Y) are forced Low, regardless of all other input conditions.

Moving data from two groups of registers to four common output buses is a common use of CD54HC157. The state of the Select input determines the particular register from which the data comes. They can also be used as function generators.




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