OTHER Bus Controllers 101

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Part	Manufacturer	Peripheral IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	Maximum Supply Voltage	Address Bus Width	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Minimum Supply Voltage	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	Maximum Seated Height	Width	External Data Bus Width	Maximum Clock Frequency	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	Technology	Maximum Supply Current	Nominal Supply Voltage	Sub-Category	Bus Compatibility	Terminal Pitch	JESD-30 Code	Moisture Sensitivity Level (MSL)	Qualification	Drive Interface Standard	JESD-609 Code
USS820FD	Broadcom	BUS CONTROLLER, UNIVERSAL SERIAL BUS	OTHER	BALL	48	LFBGA	SQUARE	PLASTIC/EPOXY	YES	3.465 V	5	3.3	GRID ARRAY, LOW PROFILE, FINE PITCH	BGA48,8X8,20	3.135 V	85 Cel	0 Cel	TIN LEAD	BOTTOM	1.44 mm	5 mm	8	12.024 MHz	30	240	5 mm	CMOS	30 mA	3.3 V	Bus Controllers		.5 mm	S-PBGA-B48		Not Qualified		e0
L-USS820FD-DB	Broadcom	BUS CONTROLLER, UNIVERSAL SERIAL BUS	OTHER	BALL	48	LFBGA	SQUARE	PLASTIC/EPOXY	YES	3.465 V	5	3.3	GRID ARRAY, LOW PROFILE, FINE PITCH	BGA48,8X8,20	3.135 V	85 Cel	0 Cel		BOTTOM	1.44 mm	5 mm	8	12.024 MHz	NOT SPECIFIED	NOT SPECIFIED	5 mm	CMOS	30 mA	3.3 V	Bus Controllers		.5 mm	S-PBGA-B48		Not Qualified
USS820D-DB	Broadcom		OTHER	GULL WING	44	QFP	SQUARE	PLASTIC/EPOXY	YES			3.3	FLATPACK	QFP44,.5SQ,32		85 Cel	0 Cel		QUAD								CMOS	30 mA	3.3 V	Bus Controllers		.8 mm	S-PQFP-G44		Not Qualified
PEX8614-BA50BC	Broadcom	BUS CONTROLLER, PCI	OTHER	BALL	324	HBGA	SQUARE	PLASTIC/EPOXY	YES	1.05 V			GRID ARRAY, HEAT SINK/SLUG	BGA324,18X18,40	.95 V	85 Cel	-10 Cel		BOTTOM	1.9 mm	19 mm					19 mm	CMOS		1 V		I2C; PCI; SMBUS; SPI; USB	1 mm	S-PBGA-B324			IEEE 1149.1; IEEE 1149.6
PEX8614-BA50BCG	Broadcom	BUS CONTROLLER, PCI	OTHER	BALL	324	HBGA	SQUARE	PLASTIC/EPOXY	YES	1.05 V			GRID ARRAY, HEAT SINK/SLUG	BGA324,18X18,40	.95 V	85 Cel	-10 Cel	TIN SILVER COPPER	BOTTOM	1.9 mm	19 mm				260	19 mm	CMOS		1 V		I2C; PCI; SMBUS; SPI; USB	1 mm	S-PBGA-B324	3		IEEE 1149.1; IEEE 1149.6	e1

Bus Controllers

Bus controllers are integrated circuits that are used to manage and control the flow of data and control signals between different devices in a computer system. They are commonly used in systems that have multiple buses, such as a memory bus and an I/O bus. Bus controllers ensure that data is transferred efficiently and correctly between different devices in the system.

One of the primary functions of a bus controller is to manage bus arbitration. Bus arbitration is the process of resolving conflicts that occur when two or more devices on the bus attempt to access the bus at the same time. Bus controllers use various algorithms to determine which device has priority access to the bus and when other devices can access it.

Another important function of bus controllers is to manage the transfer of data and control signals between devices on the bus. This involves controlling the timing and synchronization of signals, as well as error detection and correction. Bus controllers also manage other aspects of the bus, such as interrupt handling and power management.