Description:The Intersil 82C88 is a high performance CMOS Bus Controller manufactured using a self-aligned silicon gate CMOS process (Scaled SAJI IV). The 82C88 provides the control and command timing signals for 80C86, 80C88, 8086, 8088, 8089, 80186, and 80188 based systems. The high output drive capability of the 82C88 eliminates the need for additional bus drivers. Static CMOS circuit design insures low operating power. The Intersil advanced SAJI process results in performance equal to or greater than existing equiv
The recommended operating voltage range for the MD82C88/B is 4.5V to 5.5V, with a typical voltage of 5V.
The MD82C88/B has an internal POR circuit that resets the device when the power supply voltage rises above 3.5V. To ensure proper operation, it is recommended to follow a slow power-up sequence, with a rise time of at least 10ms, to allow the internal POR circuit to stabilize.
The MD82C88/B supports a maximum clock frequency of 33MHz, but it is recommended to operate the device at a frequency of 25MHz or lower to ensure reliable operation and minimize power consumption.
The MD82C88/B has a multiplexed address/data bus (AD0-AD7) that requires an external latch or buffer to demultiplex the address and data signals. Additionally, the device requires an external memory controller or glue logic to manage the memory access and control signals.
The RAS and CAS signals are used to control the access to the external memory device. RAS is used to latch the row address, while CAS is used to latch the column address. The MD82C88/B uses these signals to generate the necessary memory control signals, such as OE (Output Enable), WE (Write Enable), and CE (Chip Enable).
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MD82C88/B Overview
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