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CDP1871AC

Part Number	CDP1871AC
Manufacturer	GE
Description	CMOS Keyboard Encoder
Published	Feb 22, 2017
Detailed Description	_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CMOS Peripherals CDP1871A,CDP1871AC ~VDD , " t SliiFT J 38 1 CONTRO...
Datasheet	CDP1871AC PDF File

Overview

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CMOS Peripherals CDP1871A,CDP1871AC ~VDD , " t SliiFT J 38 1 CONTROL 4 37t--- ALPHA 3'5f-- DEBOUNCE 06-- 6 " 33 .
.
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DA f--32f-- BUS 7 31 BUS (; 3O~BUS" 29>-- BUS 4 2Bf-- BlJS 3 ::3::'-"'E"" 26 - BBUUSS2! ~~; 0 19 22 C52 20 21 e5i TOP VIEW TERMINAL ASSIGNMENT CMOS Keyboard Encoder Features: • Directly interfaces with COP1BOO-series microprocessors • Low power dissipation • 3-state outputs • Scans and generates code for 53 key ASCII keyboard plus 32 HEX keys (SPST mechanical contact switches) • Shift, control, and alpha lock inputs • RC-controlled debounce circuitry • Single 4 to 10.
5 V supply (COPIB71A); 4 to 6.
5 V (COPIB71AC) • N-key lockout The RCA-CDP1871A is a keyboard encoder designed to directly interface between a CDP1800-series microprocessor and a mechanical keyboard array, providing up to 53 ASCII coded keys and 32 HEX coded keys, as shown in the system diagram (Fig.
1).
The keyboard may consist o...

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