CD74HC257 High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs | TI.com

CD74HC257
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High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs

High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs - CD74HC257
Datasheet
 

Description

The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE\) is active LOW. When OE\ is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.

Moving data from two groups of registers to four common output buses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator.

Features

  • Buffered Inputs
  • Typical Propagation Delay (In to Output) = 12ns at VCC = 5V, CL = 15pF, TA = 25°C
  • Fanout (Over Temperature Range)
    • Standard Outputs...10 LSTTL Loads
    • Bus Driver Outputs...15 LSTTL Loads
  • Wide Operating Temperature Range...–55°C to 125°C
  • 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

Data sheet acquired from Harris Semiconductor

Parametrics

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Part number Order Function Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) Configuration Type IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Bits (#) Digital input leakage (Max) (uA) ESD CDM (kV) ESD HBM (kV)
CD74HC257 Order now Encoder
Multiplexer    
HC     2     6     4     3.3
5    
28     0.08     38     2:1     3-State Output     7.8     -7.8     Catalog     -55 to 125     PDIP | 16
SOIC | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
2     5     0.75     2    
CD54HC257 Samples not available Encoder/Multiplexer     HC     2     6     4     3.3
5    
28     0.08     38     2:1     3-State Output     7.8/-7.8       Military     -55 to 125     CDIP | 16     16CDIP: 135 mm2: 6.92 x 19.56 (CDIP | 16)     2     5     0.75     2