CD74HC257 Series
High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs
| Part | Mounting Type | Type | Supplier Device Package | Package / Case | Package / Case | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Supply [Min] | Voltage - Supply [Max] | Current - Output High, Low | Voltage Supply Source | Circuit [custom] | Circuit [custom] | Independent Circuits |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments CD74HC257E | Through Hole | Multiplexer | 16-PDIP | 0.3 in, 7.62 mm | 16-DIP | -55 °C | 125 °C | 2 V | 6 V | 7.8 mA, 7.8 mA | Single Supply | 4 | 2:1 | 1 |
Texas Instruments CD74HC257M96 | Surface Mount | Multiplexer | 16-SOIC | 0.154 in, 3.9 mm Width | 16-SOIC | -55 °C | 125 °C | 2 V | 6 V | 7.8 mA, 7.8 mA | Single Supply | 4 | 2:1 | 1 |
Texas Instruments CD74HC257M | Surface Mount | Multiplexer | 16-SOIC | 0.154 in, 3.9 mm Width | 16-SOIC | -55 °C | 125 °C | 2 V | 6 V | 7.8 mA, 7.8 mA | Single Supply | 4 | 2:1 | 1 |
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.