Texas Instruments' CD74HC4067 and CD74HCT4067 devices are digitally controlled analog switches that utilize silicon-gate CMOS technology. This achieves operating speeds similar to LSTTL with the low-power consumption of standard CMOS integrated circuits.
These analog multiplexers/demultiplexers control analog voltages that may vary across the voltage supply range. They are bidirectional switches thus allowing any analog input to be used as an output and vice-versa. The switches have low "on" resistance and low "off" leakages. In addition, these devices have an enable control which when high will disable all switches to their "off" state.
| Features |
|
|
- Wide analog input voltage range
- Low "ON" resistance
- VCC = 4.5 V: 70 Ω (typical)
- VCC = 6 V: 60 Ω (typical)
- Fast switching and propagation speeds
- "Break-before-make" switching: 6 ns (typical) at 4.5 V
- Available in both narrow and wide-body plastic packages
- 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
- 2 V to 6 V operation
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V
- HCT types
- 4.5 V to 5.5 V operation
- Direct LSTTL input logic compatibility, VIL = 0.8 V (maximum), VIH = 2 V (minimum)
- CMOS input compatibility, Il 1 µA at VOL, VOH
|
