전자부품 데이터시트 검색엔진 |
|
74F85 데이터시트(PDF) 2 Page - NXP Semiconductors |
|
74F85 데이터시트(HTML) 2 Page - NXP Semiconductors |
2 / 10 page Philips Semiconductors Product specification 74F85 4-bit magnitude comparator 2 September 27, 1994 853–0055 13903 FEATURES • High-impedance NPN base inputs for reduced loading (20 µA in High and Low states) • Magnitude comparison of any binary words • Serial or parallel expansion without extra gating DESCRIPTION The 74F85 is a 4-bit magnitude comparator that can be expanded to almost any length. It compares two 4-bit binary, BCD, or other monotonic codes and presents the three possible magnitude results at the outputs. The 4-bit inputs are weighted (A0–A3) and (B0–B3) where A3 and B3 are the most significant bits. The operation of the 74F85 is described in the Function Table, showing all possible logic conditions. The upper part of the table describes the normal operation under all conditions that will occur in a single device or in a series expansion scheme. In the upper part of the table the three outputs are mutually exclusive. In the lower part of the table, the outputs reflect the feed-forward conditions that exist in the parallel expansion scheme. The expansion inputs IA>B, and IA=B and IA<B are the least significant bit positions. When used for series expansion, the A>B, A=B and A<B outputs of the lease significant word are connected to the corresponding IA>B, IA=B and IA<B inputs of the next higher stage. Stages can be added in this manner to any length, but a propagation delay penalty of about 15ns is added with each additional stage. For proper operation, the expansion inputs of the least significant word should be tied as follows: IA>B = Low, IA=B = High, and IA<B = Low. PIN CONFIGURATION 16 15 14 13 12 11 10 7 6 5 4 3 2 1 A<B VCC A1 B1 A0 A2 A3 B2 B3 IA<B A=B IA=B IA>B A>B 9 8 GND B0 SF00075 TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F85 7.0ns 40mA ORDERING INFORMATION DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C PKG DWG # 16-pin plastic DIP N74F85N SOT38-4 16-pin plastic SO N74F85D SOT162-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0–A3 Comparing inputs 1.0/0.033 20 µA/20µA B0–B3 Comparing inputs 1.0/0.033 20 µA/20µA IA<B, IA=B, IA>B Expansion inputs (active High) 1.0/0.033 20 µA/20µA A<B, A=B, A>B Data outputs (active High) 50/33 1.0mA/20mA NOTE: One (1.0) FAST unit load is defined as: 20 µA in the High state and 0.6mA in the Low state. LOGIC SYMBOL 56 7 10 12 13 15 9 11 14 VCC = Pin 16 GND = Pin 8 SF00076 1 A0 A1 A2 A3 B0 B1 B2 B3 A>B A=B A<B IA>B IA=B IA<B 2 3 4 IEC/IEEE SYMBOL SF00077 COMP 7 6 5 10 12 13 15 9 11 14 1 2 3 4 0 3 0 3 < = > P<Q P=Q P>Q P Q |
유사한 부품 번호 - 74F85 |
|
유사한 설명 - 74F85 |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |