CD54HCT257
Features
- Buffered Inputs
- Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15p F, TA = 25o C
- Fanout (Over Temperature Range)
- Standard Outputs
- -
- 10 LSTTL Loads
- Bus Driver Outputs
- - . . . 15 LSTTL Loads
- Wide Operating Temperature Range . . . -55o C to 125o C
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction pared 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 patibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input patibility, Il ≤ 1µA at VOL, VOH
Description
The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a mon 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...
