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74ALS240ADB Fiches technique(PDF) 2 Page - NXP Semiconductors |
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74ALS240ADB Fiches technique(HTML) 2 Page - NXP Semiconductors |
2 / 9 page Philips Semiconductors Product specification 74ALS240A/ 74ALS240A-1 Octal inverter buffer (3-State) 2 1991 Feb 08 853–1244 01670 FEATURES • Octal bus interface • 3-State buffer outputs sink 24mA and source 15mA • The -1 version sinks 48 mA DESCRIPTION The 74ALS240A is an octal buffer that is ideal for driving bus lines or buffer memory address registers. The outputs are all capable of sinking 24mA and sourcing up to 15mA, producing very good capacitive drive characteristics. The device features two output enables, OEa and OEb, each controlling four of the 3-State outputs. The 74ALS240A-1 sinks 48 mA IOL if the VCC is limited to 5.0V ±0.25V. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS240A 4.5ns 15mA 74ALS240A-1 4.5ns 15mA PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SF00320 OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 GND VCC OEb Ya0 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 20-pin plastic DIP 74ALS240AN, 74ALS240A-1N SOT146-1 20-pin plastic SOL 74ALS240AD, 74ALS240A-1D SOT163-1 20-pin plastic SSOP Type II 74ALS240ADB, 74ALS240A-1DB SOT339-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Ian, Ibn Data inputs 1.0/1.0 20 µA/0.1mA OEa, OEb Output Enable inputs (active-Low) 1.0/1.0 20 µA/0.1mA Yan, Ybn Data outputs 750/240 15mA/24mA Yan, Ybn Data outputs (-1 version) 750/480 15mA/48mA 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 20 GND = Pin 10 SF00321 1 19 OEa OEb 2 4 6 8 17 15 13 11 18 16 14 12 3579 Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3 Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3 IEC/IEEE SYMBOL 2D 1 2 SF00322 1 19 EN1 EN2 4 2 6 8 17 15 13 11 18 16 14 12 3 5 7 9 |
Numéro de pièce similaire - 74ALS240ADB |
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Description similaire - 74ALS240ADB |
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