CD54HCT257 Series
High Speed CMOS Logic Non-Inverting Quad 2-Input Multiplexer with 3-State Outputs
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
High Speed CMOS Logic Non-Inverting Quad 2-Input Multiplexer with 3-State Outputs
| Part | Supplier Device Package | Mounting Type | Package / Case | Type | Operating Temperature [Min] | Operating Temperature [Max] | Circuit [custom] | Circuit [custom] | Independent Circuits | Voltage Supply Source | Voltage - Supply [Max] | Voltage - Supply [Min] | Current - Output High, Low |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments 5962-8970501EA | |||||||||||||
Texas Instruments CD54HCT257F3A | 16-CDIP | Through Hole | 16-CDIP (0.300", 7.62mm) | Data Selector/Multiplexer | -55 °C | 125 °C | 4 | 2:1 | 1 | Single Supply | 5.5 V | 4.5 V | 7.8 mA, 7.8 mA |
Key Features
• Buffered InputsTypical Propagation Delay (In to Output) = 12ns at VCC= 5V, CL= 15pF, TA= 25°CFanout (Over Temperature Range)Standard Outputs...10 LSTTL LoadsBus Driver Outputs...15 LSTTL LoadsWide Operating Temperature Range...–55°C to 125°CBalanced Propagation Delay and Transition TimesSignificant Power Reduction Compared to LSTTL Logic ICsHC Types2V to 6V OperationHigh Noise Immunity: NIL= 30%, NIH= 30% of VCCat VCC= 5VHCT Types4.5V to 5.5V OperationDirect LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH= 2V (Min)CMOS Input Compatibility, Il1µA at VOL, VOHData sheet acquired from Harris SemiconductorBuffered InputsTypical Propagation Delay (In to Output) = 12ns at VCC= 5V, CL= 15pF, TA= 25°CFanout (Over Temperature Range)Standard Outputs...10 LSTTL LoadsBus Driver Outputs...15 LSTTL LoadsWide Operating Temperature Range...–55°C to 125°CBalanced Propagation Delay and Transition TimesSignificant Power Reduction Compared to LSTTL Logic ICsHC Types2V to 6V OperationHigh Noise Immunity: NIL= 30%, NIH= 30% of VCCat VCC= 5VHCT Types4.5V to 5.5V OperationDirect LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH= 2V (Min)CMOS Input Compatibility, Il1µA at VOL, VOHData sheet acquired from Harris Semiconductor
Description
AI
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.
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.