MAX14778 - Above-and Below-the-Rails 4:1 Analog Multiplexer
Maxim's MAX14778 dual 4:1 analog multiplexer supports analog signals up to ±25 V with a single 3.0...5.5 V supply. Each multiplexer has separate control inputs to allow independent switching, making the device ideal for multiplexing different communications signals with the same connector pins. Extended ESD protection of ±6 kV (Human Body Model) enable direct interfacing to cables and connectors.
The MAX14778 features a low 1.5 Ω (max) on-resistance and 3 mΩ (typ) flatness to maximize signal integrity over the entire common-mode voltage range. Each multiplexer can carry up to 300 mA of continuous current through the multiplexer in either direction.
The MAX14778 supports switching of full-speed USB 1.1 signals (12 Mbps) and RS-485 data rates of up to 20 Mbps.
The MAX14778 is available in a 20-pin (5 mm x 5 mm) TQFN package and is specified over the -40...+85°C extended temperature range.
MAX14778 Features
- ±25 V signal range
- Single 3.0...5.5 V supply
- Two independent multiplexers
- 1.5 Ω RON (max)
- 3 mΩ RON flatness (typ)
- 300 mA maximum current through multiplexer
- 78 pF input capacitance
- 75 MHz large-signal bandwidth
- Break-before-Make operation
- Extended ESD protection on A_ and B_ Pins
- ±6 kV Human Body Model (HBM)
MAX14778 Applications
- Audio/Data multiplexing
- Communication systems
- Connector sharing
- Gaming machines
- Handheld industrial devices
- POS peripherals
- RS-485/RS-232/USB 1.1 multiplexing
More Information
For additional information please
Video
This video demonstrates the MAX14778, a new idea in analog switches with the industry's first ±25 V above- and below-the-rails multiplexer.
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