具有三態(tài)輸出的高速 CMOS 邏輯 8 輸入多路復用器/寄存器
| Technology Family | HCT |
| Function | Digital Multiplexer |
| Configuration | 8:1 |
| Number of channels (#) | 1 |
| Operating temperature range (C) | -55 to 125 |
| Rating | Catalog |
- HC/HCT354
- Transparent Data and Select Latches
- Buffered Inputs
- Three-State Complementary Outputs
- Bus Line Driving Capability
- Typical Propagation Delay: VCC = 5V, CL = 15pF, TA = 25°C
- Data to Output = 18ns
- 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
- 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
The CD54HC354, CD74HC354, and CD74HCT354 are data selectors/multiplexers that select one of eight sources. In both types, the data select bits S0, S1 and S2 are stored in transparent latches that are enabled by a low latch enable input, LE\.
In the HC/HCT354 the data enable input, E\, controls transparent latches that pass data to the outputs when E\ is high and latches in new data when E\ is low.
In both types the three-state outputs are controlled by three output-enable inputs OE1\, OE2\, and OE3.
