CDP1851C - Intersil Corporation

CDP1851C CMOS Programmable I/O Interface

THE CDP1851 and CDP1851C are CMOS programmable twoport I/Os designed for use as general-purpose I/O devices. They are directly compatible with CDP1800-series microprocessors functioning at maximum clock frequency. Each port can be programmed in either byte-I/O or bit-programmable modes for interfacing with peripheral devices such as printers and keyboards. B.

Features

• 20 Programmable I/O Lines
• Programmable for Operation in Four Modes: - Input - Output - Bidirectional - Bit-programmable
• Operates in Either I/O or Memory Space Ordering Information PACKAGE TEMP. RANGE PDIP Burn-In SBDIP Burn-In 5V 10V PKG. NO. -40oC to +85oC CDP1851CE CDP1851CEX -40oC to +85oC CDP1851CD CDP1851E E40.6 E40.6 D40.6 CDP1851CDX CDP1851DX D40.6 Pinout CDP1851, CDP1851C (PDIP, SBDIP) TOP VIEW CLOCK 1 CS 2 RA0 3 RA1 4 BUS0 5 BUS1 6 BUS2 7 BUS3 8 BUS4 9 BUS5 10 BUS6 11 BUS7 12 CLEAR 13 A INT 14 B INT 15 B RDY 16 B 17 STROBE B0 18 B1 19 VSS 20 40 VDD 39 RD/WE 38 WR/RE 37 TPB .