INS8216 Datasheet | National Semiconductor

Description The INS8216 and INS8226 are four-bit bidirectional bus drivers for use in bus oriented applications. The non-inverting INS8216 and inverting INS8226 drivers are provided for flexibility in system design. Each buffered line of the four-bit driver consists of two separate buffers that are TRI-STATE'" to achieve direct bus interface and bidirectional capability. On one side of the driver the output of one buffer and the input of another are tied together (DB);' this side is used to interface to the system side ponents such as memories, 1/0, etc., because its interface is TTL patible and it has high drive (50m A). On the other side of the driver the inputs and outputs are separated to provide maximum flexibility. Of course, they can be tied together so that the driver can be used to buffer a true bidirectional bus. The DO outputs on this side of the driver have a special high voltage output drive capability so that direct interface to the 8080 type CPUs is achieved with an adequate amount of noise immunity. The CS input is a device enable. When it is "high" the output drivers are all forced to their high-impedance state. When it is a "low" the device is enabled and the direction of the data flow is determined by the Ol EN input. INS821618226 MICROBUS Configuration The Ol EN input controls the direction 01 data flow, which is acplished by forcing one of the pair of buffers into its high-impedance state and allowing the other to transmit its data. A simple two-gate circuit is used for this function. Features - Data bus buffer driver for 8080 type CPUs - Low input load current - 0.25m A maximum - High output drive capability for driving system data bus - 50m A at 0.5V - Power up-down protection - The INS8216 has non-inverting outputs. - The INS8226 has inverting outputs. - Output high voltage patible with direct inter- face to MOS ' - TRI- STATE outputs - Advanced Schottky processing - Available in military and mercial temperature ranges - MICROBUSTM'...