The MAX308/MAX309 are Maxim's single-chip CMOS precision analog multiplexers, which have low on-resistance, low leakage, fast switching speed and are widely used in various circuits.
The MAX308 and MAX309 are precision, monolithic CMOS analog multiplexers. MAX308 is a single‑ended 1‑of‑8 device, while MAX309 is a differential 2‑of‑4 device. Both offer low on‑resistance (less than 100 Ω), tight channel matching (<5 Ω), flat on‑resistance over a 7 Ω signal range, low charge injection (<10 pC), and excellent ESD protection (>2000 V). They operate from a single +5 V to +30 V supply or bipolar ±5 V to ±20 V supplies and consume less than 300 µW.
These parts are intended for applications such as sample‑and‑hold circuits, automatic test equipment, heads‑up displays, guidance and control systems, military radios, communications, battery‑operated systems, and audio signal routing. Multiple package options are available (DIP, SO, TSSOP, CERDIP) with temperature ranges from –55 °C to +125 °C. Ordering information and detailed pin‑out diagrams are provided.
| On‑Resistance | <100 Ω |
|---|---|
| On‑Resistance Match Between Channels | <5 Ω |
| Flat On‑Resistance over Signal Range | 7 Ω max |
| Charge Injection | <10 pC |
| NO‑Off Leakage Current | <5 nA at +85 °C |
| COM‑Off Leakage Current | <20 nA at +85 °C |
| ESD Protection | >2000 V |
| Supply Voltage (single‑supply) | +5 V to +30 V |
| Supply Voltage (bipolar) | ±5 V to ±20 V |
| Power Consumption | <300 µW |
The devices have an on‑resistance of less than 100 Ω.
They can operate from a single +5 V to +30 V supply or from bipolar ±5 V to ±20 V supplies.
The charge injection is guaranteed to be less than 10 pC.