SA9203

· Six (SA9203) or three (SA9205) 8-Bit I/O Ports
· Each bit of one port independently programmable as input or output
· Five (SA9203) or two (SA9205) remaining ports can be individually configured as input or output. (Direction applicable to all 8 pins of each port.)
· One 8-Bit port programmable as either atched or transparent inputs
· Supports byte-wide and bit-wide I/O port addressing modes on all ports
· Readback of all control and port registers
· Interfaces directly with multiplexed address and data bus microprocessors/ microcontrollers
· Internal address latch
· Single +5V power supply
· Low power CMOS
· Completely static operation
· TTL-level compatibility

* Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at these or any other condition above those indicated in the operational sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.

The SAMES SA9203/5 Port Expander is a CMOS device suited to microprocessor based applications requiring input/output port expansion. The SA9203 interfaces very simply to any microcontroller/microprocessor with a multiplexed address/data bus structure.

The SA9203 includes 8 independently programmable I/O pins for Port A and Port B to F (5 ports) independently programmable as I/O. SA9203 is packaged in a PCB efficient 68 pin PLCC package. The SA9205 includes 8 independently programmable I/O pins for Port A with Port B and Port C as independently programmable I/O, packaged in a cost effective 44 pin PLCC package.