công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
DM74LS469J bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
|
|
DM74LS469J bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 4 page TLL8333 July 1989 DM54LS469DM74LS469 8-Bit UpDown Counter General Description The ‘LS469 is an 8-bit synchronous updown counter with parallel load and hold capability Three function-select in- puts (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 (D7–D0) into the out- put register (Q7–Q0) The HOLD operation holds the previ- ous value regardless of clock transitions The INCREMENT operation adds one to the output register when the carry-in input is TRUE (CBIeLOW) otherwise the operation is a HOLD The carry-out (CBO) is TRUE (CBOeLOW) when the output register (Q7–Q0) is all HIGHs otherwise FALSE (CBOeHIGH) The DECREMENT operation subtracts one from the output register when the borrow-in input is TRUE (CBIeLOW) otherwise the operation is a HOLD The bor- row-out (CBO) is TRUE (CBOeLOW) when the output reg- ister (Q7–Q0) is all LOWs otherwise FALSE (CBOeHIGH) The output register (Q7–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 stan- dards Two or more ‘LS469 octal updown counters may be cascaded to provide larger counters FeaturesBenefits Y 8-bit updown counter for microprogram-counter DMA controller and general-purpose counting applications Y 8 bits matches byte boundaries Y Bus-structured pinout Y 24-pin SKINNYDIP saves space Y TRI-STATE outputs drive bus lines Y Low current PNP inputs reduce loading Y Expandable in 8-bit increments Connection Diagram Top View TLL8333 – 1 Order Number DM54LS469J DM74LS469J or DM74LS469N See NS Package Number J24F or N24C Standard Test Load TLL8333 – 3 Function Table OE CK LD UD CBI D7 – D0 Q7 – Q0 Operation H X X X X X Z HI-Z L u L X X D D LOAD L u H L H X Q HOLD L u H L L X Q plus 1 INCREMENT L u H H H X Q HOLD L u H H L X Q minus 1 DECREMENT TRI-STATE is a registered trademark of National Semiconductor Corp C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
Số phần tương tự - DM74LS469J |
|
Mô tả tương tự - DM74LS469J |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất 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 |