The MAX4947/MAX4948 analog switches operate from a single +1.8V to +5.5V supply. These switches feature a low 30pF (typ) capacitance for high-speed data switching applications. The MAX4947 is a triple double-pole/double-throw (DPDT) switch, and the MAX4748 is a hex single-pole/double-throw (SPDT) switch with one control logic input. The MAX4947 has three logic inputs to control the switches in pairs. The MAX4948 has one logic input and an enable input (EN) to disable the switches.
The MAX4947 (triple DPDT) and MAX4948 (hex SPDT) are analog switches that operate from a single +1.8 V to +5.5 V supply. They feature low on‑resistance (≈42 Ω typ) and low capacitance (30 pF typ), making them suitable for high‑speed data‑switching applications such as USB, UART, SDIO, and memory‑stick interfaces.
The document includes absolute‑maximum ratings, detailed electrical characteristics, pin‑out tables, truth‑tables, and package information for the 24‑pin TQFN and 25‑bump UCSP packages. It also provides application notes on power‑supply sequencing, control‑logic inputs, and enable functionality.
| Supply Voltage Range | 1.8 V to 5.5 V |
|---|---|
| Typical On‑Resistance | 42 Ω (typ) |
| Typical Switch Capacitance | 30 pF (typ) |
| Package Types | 24‑pin TQFN (4 mm × 4 mm) and 25‑bump UCSP (2.5 mm × 2.5 mm) |
They operate from a single +1.8 V to +5.5 V supply.
The MAX4947 is a triple double‑pole/double‑throw (DPDT) switch.
The typical on‑resistance is 42 Ω.
They are offered in a 24‑pin TQFN (4 mm × 4 mm) and a 25‑bump UCSP (2.5 mm × 2.5 mm) package.