74F1244 Datasheet | NXP Semiconductors

FEATURES - High impedance NPN base inputs for reduced loading (20µA in High and Low states) PIN CONFIGURATION OEa 1 Ia0 2 Yb0 3 Ia1 4 Yb1 5 Ia2 6 Yb2 7 Ia3 8 Yb3 9 GND 10 20 VCC 19 OEb 18 Ya0 17 Ib0 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3 - Low power, light loading - Functional pin-for-pin equivalent of 74F244 - 1/30th the bus loading of 74F244 - Provides ideal interface and increase fan-out of MOS microprocessors - Octal bus interface - 3-State buffer outputs sink 64m A and source 15m A DESCRIPTION The 74F1244 is an octal buffer that is ideal for driving bus lines or buffer memory address registers. The outputs are capable of sinking 64m A and sourcing up to 15m A, producing very good capacitive drive characteristics. The device features two Output Enables, OEa and OEb, each controlling four of the 3-State outputs. The 74F1244 is pin and functionally patible with the 74F244. The lower power and light bus loading features make it an ideal part to interface directly with MOS microprocessors. TYPE 74F1244 SF00227 TYPICAL PROPAGATION DELAY 4.5ns TYPICAL SUPPLY CURRENT (TOTAL) 43m A ORDERING INFORMATION DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F1244N N74F1244D DRAWING NUMBER SOT146-1 SOT163-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS Ian, Ibn OEa, OEb Yan, Ybn Data inputs Output enable inputs (active Low) Data outputs DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/0.033 1.0/0.033 750/106.7 LOAD VALUE HIGH/LOW 20µA/20µA 20µA/20µA 15m A/64m A NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6m A in the low state. LOGIC SYMBOL 2 4 6 8 17 15 13 11 IEC/IEEE SYMBOL 1 19 EN1 EN2 18 16 14 12 2 3 5 7 9 Ia0 1 19 OEa OEb Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3 2 4 6 8 Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3 17 15 18 VCC = Pin 20 GND = Pin...