DG408L/409L are low voltage pin-for-pin compatible companion devices to the industry standard DG408/409 with improved performance. Using BiCMOS wafer fabrication technology allows the DG408L/409L to operate on single and dual supplies. Single supply voltage ranges from 3- to 12-V while dual supply operation is recommended with -3 to -6 V. The DG408L is an 8-channel single-ended analog multiplexer designed to connect one of eight inputs to a common output as determined by a 3-bit binary address (A0, A1, A2). The DG409L is a dual 4-channel differential analog multiplexer designed to connect one of four different inputs to a common output.
The DG408L/409L family provides precision analog switching for data‑acquisition, portable test equipment, and communication systems. They are pin‑for‑pin compatible with the DG408/409 series but offer lower on‑resistance, faster switching times, reduced leakage, and higher off‑isolation. Both single‑supply (2.7 V‑12 V) and dual‑supply (+3 V‑+6 V) operation are supported.
Typical applications include sample‑and‑hold circuits, battery‑operated devices, and audio/video signal routing. The datasheet includes functional block diagrams, pin configurations, truth tables, ordering information, absolute maximum ratings, and extensive electrical specifications for various supply conditions.
| On‑Resistance (R_on) typical | 17 mΩ |
|---|---|
| Turn‑on time (t_on) typical | 38 ns |
| Leakage current (I_leak) max | 0.2 nA |
| ESD protection | 2000 V HBM |
| Supply voltage range | 2.7‑12 V single, +3‑+6 V dual |
| Charge injection | 1 pC |
The typical on‑resistance is about 17 mΩ.
Turn‑on time is typically 38 ns and turn‑off time 18 ns.
They work from 2.7 V to 12 V on a single supply or from +3 V to +6 V on a dual supply.