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The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...
This is often called the CMOS battery or BIOS battery. The original IBM AT through to the PS/2 range, used a relatively large primary lithium battery, compared to later models, to retain the clock and configuration memory. [2] These early machines required the backup battery to be replaced periodically due to the relatively large power consumption.
A very early CD4029A counter IC, in 16-pin ceramic dual in-line package (DIP-16), manufactured by RCA Colorized IC die and schematics of CD4011BE NAND gateThe 4000 series was introduced as the CD4000 COS/MOS series in 1968 by RCA [1] as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips.
It measures 132.5 mm x 92.8 mm x 58.8 mm and weighs 539 g including memory card and battery. [8] Mechanical dials are provided for key operations, including shutter speed, ISO sensitivity, exposure compensation, drive modes and metering modes. It lacks built-in flash, but includes a flash unit. 26.1 megapixels X-Trans CMOS IV sensor. [2]
CMOS inverter (a NOT logic gate). Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss ", / s iː m ɑː s /, /-ɒ s /) is a type of metal–oxide–semiconductor field-effect transistor (MOSFET) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions. [1]
The bottom of the cabinet contained a provision for an optional battery backup unit and two RA90 or RA92 hard disk drives. The battery backup unit could provide power to the system for one second in the event of a power failure, after which the system ceased to operate, but continued to preserve the data in the cache and memory for ten minutes.