Analog Devices LTC1694-1 Product Info

• Improves SMBus/I²C^™ Rise Time Transition
• Ensures Data Integrity with Multiple Devices on the SMBus/I²C
• Improves Low State Noise Margin
• Wide Supply Voltage Range: 2.7V to 6V
• Parallel Multiple LTC1694-1 Devices for Increased Drive
• Low Profile (1mm) SOT-23 (ThinSOT^™) Package

The LTC1694-1 is a dual SMBus active pull-up designed to enhance data transmission speed and reliability under all specified SMBus loading conditions. The LTC1694-1 is also compatible with the Philips I²C Bus.

The LTC1694-1 allows multiple device connections or a longer, more capacitive interconnect, without compromising slew rates or bus performance, by supplying a high pull-up current of 2.2mA to slew the SMBus or I²C lines during positive bus transitions.

During negative transitions or steady DC levels, the LTC1694-1 sources zero current. External resistors, one on each bus line, trigger the LTC1694-1 during positive bus transitions and set the pull-down current level. These resistors determine the slew rate during negative bus transitions and the logic low DC level.

The LTC1694-1 is available in a 5-pin SOT-23 package.

Applications

• Notebook and Palmtop Computers
• Portable Instruments
• Battery Chargers
• Industrial Control Application
• TV/Video Products
• ACPI SMBus Interface