DP8216 Datasheet | National Semiconductor

Description The DP8216 DP8216M and DP8226 DP8226M are 4-bit bidirectional bus drivers to use in bus oriented applications The non-inverting DP8216 DP8216M and inverting DP8226 DP8226M drivers are provided for flexibility in system design Each buffered line of the four-bit drivers 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 I O etc because its interface is TTL patible and it has high driver (50 m 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 DIEN input The DIEN input controls the direction of 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 to 8080 type CPUs Low input load current 0 25 m A maximum High output drive capability for driving system data bus 50 m A at 0 5V Power up-down protection DP8216 DP8216M have non-inverting outputs DP8226 DP8226M have inverting outputs Output high voltage patible with direct interface to MOS TRI-STATE outputs Advanced Schottky processing Available in military and mercial temperature Logic Diagrams DP8216 DP8216M DP8226 DP8226M TL F 8753 -...