IES550x family expands your 2-wire bus without the hassle
Not just another Bus Buffer Our range of bus buffers will give you the ability to expand the reach of any I2C bus or similar 2-wire bus protocol. By using one of our bus buffers you will be able to increase the number of devices on the bus, implement hot-insertion design or simply just to increase the bus length. These buffers simplify system design and expandability. Hendon Semiconductors bus buffers have been designed to address the following problems often seen on a 2-wire bus system. Bus buffers having large input-output offsets; leaves little margin for external noise or a loss in signal. Due to their large input-output offsets, these bus buffers can’t be inserted in multi-drop or back-to-back in a system. Problems can occur when the number of devices on the bus or the length of the bus lines has increased the capacitance to its maximum. Plug our bus buffers in and see the results for yourself!
IES550x family
The IES550x family has been released with great success. By using analogue techniques we have been able to create a bus buffer series that provides superior performance over the competition. Take a closer look at the following parts:. IES5501 2-wire Bus Buffer IES5502 2-wire Bus Buffer with Hot Insertion Logic IES5505 IES5515 Simple 2-wire Bus Buffer IES5507 Buffered 4-channel 2-wire Bus Switch
compatible 2-wire standards
I2CTM Bus (standard and fast mode) 2-Wire Protocols SMBusTM (standard and high power mode) PMBusTM	IPMI & IPMB AccessBus TWI DDB
what is a bus buffer
A 2-wire bus has 2 control lines to access a number of slaves on the bus. Bus buffers are used to increase the reach of a 2-wire bus or to support an increased number of devices connected to the bus. The buffer extends the bus load limit by buffering both the SCL (Clock) and SDA (Data) lines. A bus buffer can be used to create bus ‘branches’ and each branch can be enabled independently and can be brought on-line in a predetermined sequence. Following is a typical Bus Buffer application
where is a 2-wire bus and bus buffer used
The 2-wire bus is an integral part of many systems. It is used in circuits ranging from system monitoring to networking systems together to controlling an LED on a front panel. Some of these applications include:
Power Management Systems Telecommunications Systems (including ATCATM) Backplane Management / Interconnect Desktop and Portable Computers (including RAID) Compact PCIRExpress · 2-Wire Bus Switch/Multiplexing Applications Excellent for implementing cost effective radial IPMB architecture	Automotive Accessories (up to 15V) Building Automation TV / Projector / Monitor interconnection Game Consoles / Boxes TV / Projector / Monitor interconnection Game Consoles / Boxes Gaming Machine Networks LED Board Displays Power Management Systems Games Consoles Computers / Servers
I2CTM is a trademark of NXP Semiconductors B.V. SMBusTM and PMBusTM are trademarks of System Management Interface Forum (SMIF) Inc ATCATM PICMGR CompactPCIRExpress are Registered trademarks of PCI Industrial Computers Manufacturers Group