поискавой системы для электроныых деталей |
|
DM74LS469 датащи(PDF) 1 Page - Fairchild Semiconductor |
|
DM74LS469 датащи(HTML) 1 Page - Fairchild Semiconductor |
1 / 8 page DM74LS469 8-Bit Up/Down Counter General Description The ’LS469 is an 8-bit synchronous up/down counter with parallel load and hold capability. Three function-select inputs (LD, UD, CBI) provide one of four operations which occur synchronously on the rising edge of the clock (CK). The LOAD operation loads the inputs (D 7–D0) into the output register (Q 7–Q0). The HOLD operation holds the previous value regardless of clock transitions. The INCREMENT op- eration adds one to the output register when the carry-in in- put is TRUE (CBI =LOW), otherwise the operation is a HOLD. The carry-out (CBO) is TRUE (CBO =LOW) when the output register (Q 7–Q0) is all HIGHs, otherwise FALSE (CBO =HIGH). The DECREMENT operation subtracts one from the output register when the borrow-in input is TRUE (CBI =LOW), otherwise the operation is a HOLD. The borrow-out (CBO) is TRUE (CBO =LOW) when the output register (Q 7–Q0) is all LOWs, otherwise FALSE (CBO =HIGH). The output register (Q 7–Q0) is enabled when OE is LOW, and disabled (HI-Z) when OE is HIGH. The output drivers will sink the 24 mA required for many bus-interface standards. Two or more ’LS469 octal up/down counters may be cas- caded to provide larger counters. Features/Benefits n 8-bit up/down counter for microprogram-counter, DMA controller and general-purpose counting applications n 8 bits matches byte boundaries n Bus-structured pinout n 24-pin SKINNYDIP saves space n 3-STATE outputs drive bus lines n Low current PNP inputs reduce loading n Expandable in 8-bit increments Connection Diagram Standard Test Load Top View DS008333-1 Order Number DM54LS469J, DM74LS469J or DM74LS469N See Package Number J24F or N24C DS008333-3 April 1998 © 1998 Fairchild Semiconductor Corporation DS008333 www.fairchildsemi.com |
Аналогичный номер детали - DM74LS469 |
|
Аналогичное описание - DM74LS469 |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |