SN74HC251 Data Selectors/Multiplexers With 3-State Outputs | TI.com

SN74HC251
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Data Selectors/Multiplexers With 3-State Outputs

Data Selectors/Multiplexers With 3-State Outputs - SN74HC251
Datasheet
 

Description

These data selectors/multiplexers contain full binary decoding to select 1-of-8 data sources and feature strobe-controlled complementary 3-state outputs.

The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (in the high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Both outputs are controlled by the output-enable (OE)\ input. The outputs are disabled when OE\ is high.

Features

  • 3-State Version of ’HC151
  • Wide Operating Voltage Range of 2 V to 6 V
  • High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 9 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Perform Parallel-to-Serial Conversion
  • Complementary Outputs Provide True and Inverted Data

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)
SN74HC251 Order now Encoder
Multiplexer    
HC     2     6     1     3.3
5    
28     0.08     51     8:1     3-State Output     7.8     -7.8     Catalog     -40 to 85     PDIP | 16
SOIC | 16
SO | 16
SSOP | 16
TSSOP | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SO: 80 mm2: 7.8 x 10.2 (SO | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16SSOP: 48 mm2: 7.8 x 6.2 (SSOP | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
8     5     0.75     2    
SN54HC251 Samples not available Encoder/Multiplexer     HC     2     6     1     3.3
5    
28     0.08     51     8:1     3-State Output     7.8/-7.8       Military     -55 to 125     CDIP | 16
LCCC | 20    
16CDIP: 135 mm2: 6.92 x 19.56 (CDIP | 16)
20LCCC: 79 mm2: 8.89 x 8.89 (LCCC | 20)    
8     5     0.75     2