Features
- ON Resistance (Max, 25°C) 100Ω
- Low Power Consumption (PD) <11mW
- Fast Switching Action
- tTRANS <250ns
- tON/OFF(EN) <150ns
- Low Charge Injection
- Upgrade from DG508A/DG509A
- TTL, CMOS Compatible
- Single or Split Supply Operation
- Pb-Free Plus Anneal Available (RoHS Compliant)
Description
The DG408 Single 8-Channel, and DG409 Differential 4-Channel monolithic CMOS analog multiplexers are drop-in replacements for the popular DG508A and DG509A series devices. They each include an array of eight analog switches, a TTL/CMOS compatible digital decode circuit for channel selection, a voltage reference for logic thresholds and an ENABLE input for device selection when several multiplexers are present. The DG408 and DG409 feature lower signal ON resistance (100Ω) and faster switch transition time (tTRANS 250ns) compared to the DG508A or DG509A. Charge injection has been reduced, simplifying sample and hold applications. The improvements in the DG408 series are made possible by using a high-voltage silicon-gate process. An epitaxial layer prevents the latch-up associated with older CMOS technologies. Power supplies may be single-ended from +5V to +34V, or split from ±5V to ±20V. The analog switches are bilateral, equally matched for AC or bidirectional signals. The ON resistance variation with analog signals is quite low over a ±5V analog input range.
Parameters
| Attributes | Value |
|---|---|
| Switch or MUX | MUX |
| Channels (#) | 8 |
| Configuration | 2 x 4:1 |
| TON (ns) | 115 |
| TOFF (ns) | 105 |
| Charge Injection (pC) | 20 |
| Drain Capacitance (pF) | 25 |
| Leakage (nA) | 1 |
| RDS (ON) (Ohms) | 40 |
| Source Cap (pf) | 3 |
| Vcc (V) | 5 to 34, ±5 to ±20 |
| VCC (Single) (V) | 5 - 34 |
| IS (mA) | 0.2 |
| Qualification Level | Standard |
Applications
- Data Acquisition Systems
- Audio Switching Systems
- Automatic Testers
- Hi-Rel Systems
- Sample and Hold Circuits
- Communication Systems
- Analog Selector Switch
Knowledge Base
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DG408, DG409 Enable and Channel Select Voltage Levels
... inputs. They can be driven anywhere from 0V to V+ without any damage. The 2.4V value is only the VIH requirement, not a maximum rating. You may drive the pins at different logic levels. The internal 5V reference does not restrict the external input range. Suitable Products DG408, DG409
Jan 23, 2026
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