Product category: Standard Logic Devices
News Release from: Intersil | Subject: ISL88694
Edited by the Electronicstalk Editorial Team on 25 January 2005
Terminator accelerates two-wire buses
The ISL88694 SMBus accelerator is a dual active pull-up bus terminator designed to improve data transmission speed and reliability on SMBus or similar two-wire serial bus interfaces such as I2C
It permits operation of the bus at frequencies up to 100kHz despite the capacitive loads of multiple devices and/or long PC board traces. Pull-up resistors are typically used to connect each bus line to a positive supply voltage such that both clock and data lines are high when the bus is free.
However, using simple pull-up resistors on the clock and data lines becomes problematic if there are long signal lines or many devices connected to the bus.
In such cases, the combined capacitance of the bus then increases the rise time on the signal to such an extent that bus communication becomes unreliable or fails to meet the bus timing specifications.
The ISL88694 is now available in 5-lead SOT23 packaging for a price of $1.80 in 1000-unit quantities
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