CMP82C55AZ

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Number of I/O:	24
Interface:	Parallel
Interrupt Output:	No
Features:	--
Output Type:	Open Drain
Current - Output Source/Sink:	2.5mA
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Through Hole
Package / Case:	40-DIP (0.600", 15.24mm)
Supplier Device Package:	40-DIP
Base Part Number:	82C55A

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CMP82C55AZ Application Field and Working Principle: Interface - I/O ExpandersThe CMP82C55AZ is an integrated, single-chip I/O expander ideal for interface applications using high speed and peripheral bus. It operates at high speeds in both powerful and low power mechanical systems.The CMP82C55AZ is a low-power, high-speed, single-chip input/output (I/O) expander, compatible with standard chip latency. It is also capable of running multiple I/O operations simultaneously. This single-chip I/O expander contains four I/O ports (Port A, B, C and D) and two general-purpose counters.The CMP82C55AZ allows system designers to free up more processor time to devote to application-specific functions. This encourages the processor to use its resources more efficiently and lets the I/O expander handle the burden of commonly used interface tasks. This is especially valuable in systems where multiple bus masters are present and I/O performance is critical to system performance.The CMP82C55AZ supports multiple I/O use cases. It features a programmable peripheral bus, a selection of addressable I/O, and up to 256 bits of I/O space. The expander can manage multiple tasks simultaneously, by allowing the interface to interact with each of the I/O ports independently. Port A, B, C and D are each bidirectional, so the user can configure each port as an output or an input. Each port can also have its own I/O protocol.In addition to its general-purpose I/O capabilities, the CMP82C55AZ can be used as an internal clock-controlled timer. The expander has two 16-bit programmable timers, one of which can be used as an on-chip oscillator. These general-purpose half-word timers may be set to count up or down, and accept external sources as their clock inputs. This feature is of particular value in systems that require a variety of pulse-width modulation techniques.The CMP82C55AZ also contains several advanced features such as: a watchdog timer, address latch enable (ALE) and programmable address-comparator. The watchdog timer allows the system to reset when it enters an unexpected state, and the ALE and programmable address-comparator protect non-volatile memory from unauthorized access.The CMP82C55AZ is a reliable I/O expander, suitable for a wide variety of applications that require high-speed, low-power performance. Its advanced features and flexibility make it an attractive choice for most interface applications. The chip offers an efficient, one-chip solution to many commonly-used interface applications, saving valuable processor resources and providing the interface with a competitive edge.

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