CD74HCT251 High Speed CMOS Logic 8-Input Multiplexer, 3-State | TI.com

CD74HCT251 (ACTIVE) High Speed CMOS Logic 8-Input Multiplexer, 3-State

High Speed CMOS Logic 8-Input Multiplexer, 3-State - CD74HCT251
Datasheet
 

Description

The ’HC251 and ’HCT251 are 8-channel digital multiplexers with three-state outputs, fabricated with high-speed silicon-gate CMOS technology. Together with the low power consumption of standard CMOS integrated circuits, they possess the ability to drive 10 LSTTL loads. The three-state feature makes them ideally suited for interfacing with bus lines in a bus-oriented system.

This multiplexer features both true (Y) and complement (Y\) outputs as well as an output enable (OE\) input. The OE\ must be at a low logic level to enable this device. When the OE\ input is high, both outputs are in the high-impedance state. When enabled, address information on the data select inputs determines which data input is routed to the Y and Y\ outputs. The ’HCT251 logic family is speed, function, and pin-compatible with the standard ’LS251.

Features

  • Selects One of Eight Binary Data Inputs
  • Three-State Output Capability
  • True and Complement Outputs
  • Typical (Data to Output) Propagation Delay of 14ns 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
  • Alternate Source is Philips
  • 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

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)
CD74HCT251 Order now Encoder
Multiplexer    
HCT     4.5     5.5     1     5     25     0.08     18     8:1     3-State Output     4     -4     Catalog     -55 to 125     PDIP | 16
SOIC | 16    
See datasheet (PDIP)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
8     5     0.75     2    
CD54HCT251 Samples not available Encoder/Multiplexer     HCT     4.5     5.5     1     5     25     0.08     18     8:1     3-State Output     4/-4       Military     -55 to 125     CDIP | 16     See datasheet (CDIP)     8     5     0.75     2