This document introduces the features and characteristics of DG308A/DG309 quad, single-pole-single-throw (SPST) analog switches, including switching speeds, switching resistance, application scenarios, etc.
The DG308A (normally open) and DG309 (normally closed) are quad, single‑pole‑single‑throw analog switches designed for low‑power CMOS applications. They feature turn‑on times under 120 ns, turn‑off times under 90 ns, and a typical on‑resistance of 60 Ω. The devices operate from either split supplies (±5 V to ±20 V) or a single positive supply (+5 V to +30 V) while maintaining CMOS‑logic‑compatible inputs.
Typical applications include sample‑and‑hold circuits, test equipment, communications systems, PBX, guidance and control systems, heads‑up displays, and military radios. The datasheet provides absolute maximum ratings, electrical characteristics, pin configurations, and ordering information for various temperature ranges and package types.
| Turn‑on time (tON) | under 120 ns |
|---|---|
| Turn‑off time (tOFF) | under 90 ns |
| On‑resistance (rDS(ON)) | 60 Ω |
| Maximum breakdown voltage | 44 V |
| Supply voltage range | ±5 V to ±20 V (split) or +5 V to +30 V (single) |
| Operating temperature range | ‑55 °C to +125 °C (depending on package) |
The turn‑on time is under 120 ns.
They can be used with split supplies from ±5 V to ±20 V or with a single positive supply from +5 V to +30 V.
The typical on‑resistance is 60 Ω.
The devices have a maximum breakdown voltage rating of 44 V.