利用者:TAKAHASHI Shuuji/4000シリーズ
4000シリーズは、1968年に初めて生産された、集積回路（IC）のファミリーである。この初期の時代に活動していたICメーカーのほとんどすべてが、このシリーズのモデルを製作していた。このシリーズは、現在でも使用されている。
歴史
[編集]The 4000 series was introduced as the CD4000 COS/MOS series in 1968 by RCA as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips. 論理機能は、新たに導入されたThe logic functions were implemented with the newly introduced Complementary Metal–Oxide–Semiconductor (CMOS) technology. While initially marketed with "COS/MOS" labeling by RCA (which stood for Complementary Symmetry Metal-Oxide Semiconductor), the shorter CMOS terminology emerged as the industry preference to refer to the technology.[1] The first chips in the series were designed by a group led by シリーズ最初のチップは、Albert Medwinが率いるグループが設計した[2]。
Wide adoption was initially hindered by the comparatively slower speeds of the designs compared to TTL based designs. Speed limitations were eventually overcome with newer fabrication methods, leaving the older TTL chips to be phased out. The series was extended in the late 1970s and 1980s with new models that were given 45xx and 45xxx designations, but are usually still regarded by engineers as part of the 4000 series. In the 1990s, some manufacturers (e.g. Texas Instruments) ported the 4000 series to newer HCMOS based designs to provide greater speeds.
設計上の考慮事項
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The 4000 series facilitates simpler circuit design through relatively low power consumption, a wide range of supply voltages, and vastly increased load-driving capability (fanout). This makes the series ideal for use in prototyping LSI designs. While TTL based design is similarly modular, it requires meticulous planning of a circuit's electrical load characteristics. Buffered models can accommodate higher electrical currents, but have a greater risk of introducing unwanted feedback.[3][4] Many models contain a high level of integration, including fully integrated 7-segment display counters, walking ring counters, and full adders.
よく使われる4000シリーズのチップ
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- 4001 - Quad 2-input NOR gate
- 4008 - 4-bit full adder
- 4011 - Quad 2-input NAND gate
- 4013 - Dual D Type Flip Flop
- 4017 - Decade counter / walking ring counter
- 4026 - 7-segment LED counter
- 4049 - Hex inverting buffer
- 4050 - Hex non-inverting buffer
- 4051 - 8-channel analog multiplexer / demultiplexer
- 4071 - Quad 2-input OR gate
- 4081 - Quad 2-input AND gate
関連項目
[編集]参考文献
[編集]- ^ Wright, Maury. Milestones That Mattered: CMOS pioneer developed a precursor to the processor EDN, 6/22/2006
- ^ R. Jacob Baker (2010). CMOS: Circuit Design, Layout, and Simulation (3rd ed.). John Wiley & Sons. p. 7. ISBN 978-1-118-03823-9
- ^ Understanding Buffered and Unbuffered CD4xxxB Series Device Characteristics. Texas Instruments
- ^ Lancaster, Don. CMOS Cookbook, ISBN 0-672-21398-2