The MAX4885 integrates high-bandwidth analog switches and level translating buffers to implement a complete 1:2 or 2:1 multiplexer for VGA signals. The device provides switching for RGB, display data channel (DDC), and horizontal and vertical synchronization (HSYNC, VSYNC) signals. A low-noise charge pump with internal capacitors provides a boosted gate-drive voltage to improve performance of the RGB switches.
In the 1:2 multiplexer mode, HSYNC/VSYNC inputs feature level-shifting buffers to support low voltage CMOS or standard TTL-compatible graphics controllers. In the 2:1 multiplexer mode, the output buffers for the HSYNC/VSYNC inputs are disabled, allowing bidirectional signaling. In both modes, DDC signals are voltage-clamped to an external voltage to provide level translation and protection. The MAX4885 features a 5µA shutdown mode and is ESD protected to ±8kV human body model (HBM) on externally routed pins.
The MAX4885 is specified over the extended (-40°C to +85°C) temperature range, and is available in the 32-pin, 5mm x 5mm TQFN package.
Key Features
Applications/Uses
+5V Single-Supply Operation
Programmable Voltage Clamp for Open-Drain DDC Signals
Low 5Ω (typ) On-Resistance (R, G, B Signals)
Low 13pF (typ) On-Capacitance (R, G, B Signals)
Break-Before-Make Switching Protects Against Circuit Shorts
Low 300µA Supply Current (Lower than 1µA with Charge Pump Disabled)
Space-Saving, Lead-Free 32-Pin (5mm x 5mm) TQFN Package
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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