Electronic Components Datasheet Search |
|
74ALS251D Datasheet(PDF) 2 Page - NXP Semiconductors |
|
74ALS251D Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 8 page Philips Semiconductors Product specification 74ALS251 8-input multiplexer (3-State) 2 1991 Feb 08 853–1377 01670 FEATURES • 8-to-1 multiplexing • On chip decoding • Multifunction capability • Inverting and non-inverting outputs • Both outputs are 3-State for further multiplexer expansion DESCRIPTION The 74ALS251 is a logic implementation of a single 8-position switch with the switch position controlled by the state of three select (S0, S1, S2) inputs. True (Y) and complementary (Y) outputs are both provided. The output enable (OE) is active Low. When OE is High, both outputs are in High impedance state, allowing multiple connections to a common bus without driving nor loading the bus significantly. When the outputs of more than one device are tied together, the user must ensure that there is no overlap in the active-Low portion of the output enable voltages in order to avoid high currents that could exceed the maximum current rating. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS251 7.0ns 7.5mA PIN CONFIGURATION 16 15 14 13 12 11 10 7 6 5 4 3 2 1 OE VCC I7 S0 S1 I6 I4 I5 I3 I2 Y I1 I0 Y 9 8 GND S2 SC00066 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 16-pin plastic DIP 74ALS251N SOT38-4 16-pin plastic SO 74ALS251D SOT109-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW I0 – I7 Data inputs 1.0/1.0 20 µA/0.1mA S0 – S2 Select inputs 1.0/1.0 20 µA/0.1mA OE Output Enable input (active-Low) 1.0/1.0 20 µA/0.1mA Y, Y Data outputs 130/240 2.5mA/24mA NOTE: One (1.0) ALS unit load is defined as: 20 µA in the High state and 0.1mA in the Low state. LOGIC SYMBOL VCC = Pin 16 GND = Pin 8 SC00067 9 7 S2 OE 4 3 2 1 15 14 13 I0 I1 I2 I3 I4 I5 I6 YY 56 12 I7 10 S1 11 S0 IEC/IEEE SYMBOL SC00068 MUX 7 11 5 6 0 G 0 7 10 2 9 4 3 2 1 15 14 13 12 EN |
Similar Part No. - 74ALS251D |
|
Similar Description - 74ALS251D |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |