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HCF40208 データシート(PDF) 1 Page - STMicroelectronics |
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HCF40208 データシート(HTML) 1 Page - STMicroelectronics |
1 / 13 page HCC/HCF40208B June 1989 4 x 4 MULTIPORT REGISTER DESCRIPTION . FOUR 4-BIT REGISTERS . ONE INPUT AND TWO OUTPUT BUSES . UNLIMITED EXPANSION IN BIT AND WORD DIRECTIONS . DATA LINES HAVE LATCHED INPUTS . 3-STATE OUTPUTS . SEPARATE CONTROL OF EACH BUS, ALLOWING SIMULTANEOUS INDEPENDENT READING OF ANY OF FOUR REGISTERS ON BUS A AND BUS B AND INDEPENDENT WRIT- ING INTO ANY OF THE FOUR REGISTERS . 40108B IS PIN-COMPATIBLE WITH INDUS- TRY TYPE MC14580 . STANDARDIZED, SYMMETRICAL OUTPUT CHARACTERISTICS . QUIESCENT CURRENT SPECIFIED AT 20V FOR HCC DEVICE . 5V, 10V, AND 15V PARAMETRIC RATINGS . INPUT CURRENT OF 100nA AT 18V AND 25 °C FOR HCC DEVICE . 100% TESTED FOR QUIESCENT CURRENT . MEETS ALL REQUIREMENTS OF JEDEC TEN- TATIVE STANDARD N °13A, ”STANDARD SPE- CIFICATIONS FOR DESCRIPTION OF ”B” SERIES CMOS DEVICES” BEY (Plastic Package) BF (Ceramic Frit Seal Package) BM1 (Micro Package) ORDER CODES : HCC40208BF HCF40208BEY HCF40208BM1 PIN CONNECTIONS The HCC40208B (extended temperature range) and HCF40208B (intermediate temperature range) are monolithic integrated circuits, available in 24-lead dual in-line plastic or ceramic package and plastic micro package. The HCC/HCF40208B is a 4 x 4 multiport register containing four 4-bit registers, write address decoder, two separate read address decoders, and two 3-state output buses. When the ENABLE input is low, the corresponding output bus is switched, inde- pendently of the clock to a high-impedance state. The high-impedance third state provides the outputs with the capability of being connected to the bus lines in a bus-organized system without the need for interface or pull-up components. When the WRITE ENABLE input is high, all data input lines are latched on the positive transition of the CLOCKand the data is entered into the wordselected bythewrite address lines. When WRITE ENABLE is low, the CLOCK is inhibited and no new data is entered. In either case, the contents of any word may be accessed via the read address lines inde- pendent of the state of the CLOCK input. 1/13 |
同様の部品番号 - HCF40208 |
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同様の説明 - HCF40208 |
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