MB88311 Datasheet | Fujitsu Semiconductor Limited

FUJITSU CMOS INPUT/OUTPUT EXPANDER MB 88310 MB 88311 April 1986 Edition 1.0 CMOS INPUT/OUTPUT EXPANDER The Fujitsu MB 88310/MB 88311 are peripheral integrated circuits that can be connected to a 4-bit or 8-bit single- chip microputer (MCU) to provide ad- ditional I/O ports. Besides furnishing simple I/O port expansion, the MB 88310 and MB 88311 can AND or OR port data with data from the MCU, on instruc- tion from the MCU. The MB 8831 O/MB 88311 are pseudo- bidirectional ports. They are accessed in 4-bit units, but each individual bit can be used for either input or output, and input and output can be intermixed. The interface to the MCU requires only the connection of a 4-bit interface port and a strobe signal. All output ports of the MB 88310 are open- drain; MB 88311 output ports all have pull- up resistors. The output ports on both chips are reset to the high- impedance state at power- up. The MB 88310/MB 88311 are fabricated with silicon- gate CMOS process, and package in a 24-pin plastic DIP or plastic fat package (SOP). Also, they are powered with a single +5V power supply, and operate over the ambient temperature range of _40°C to +85°C. Features - CMOS Version of Fujitsu MB 88304/88305 - Four 4-bit I/O ports (16 lines) - Four Functions: Parallel input, parallel output, AND output, and OR output - AND and OR functions provide individual output capability - Single- bit input/output: Input and output can be intermixed on each port - High output drive - Built- in power- on reset circuit - CS pin for simplified input/output expansion - Two output circuit types: Open- drain output (MB 88310) 3-state output (MB 88311) - Easily connectable to MCUs with 8243 interface - Single +5V power supply - -40°C to +85°C operating temperature range - Si Iicon- gate CMOS process - Two Package Options: 24-pin plastic DIP (Suffix: - P) - 24-pin plastic SOP...