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N74F245D Datasheet(PDF) 2 Page - NXP Semiconductors |
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N74F245D Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 10 page Philips Semiconductors Product specification 74F245 Octal transceiver (3-State) 2 November 15, 1994 853–0025 14256 FEATURES • Octal bidirectional bus interface • 3-State buffer outputs sink 64mA • 15mA source current • Outputs are placed in high impedance state during power-off conditions DESCRIPTION The 74F245 is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both transmit and receive directions. The B port outputs are capable of sinking 64mA and sourcing 15mA, producing very good capacitive drive characteristics. The device features an Output Enable (OE) input for easy cascading and Transmit/Receive (T/R) input for direction control. The 3-State outputs, B0–B7, have been designed to prevent output bus loading if the power is removed from the device. PIN CONFIGURATION SF00198 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 T/R A0 A1 A2 A3 A4 A5 A6 A7 GND VCC OE B0 B1 B2 B3 B4 B6 B5 B7 TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F245 4.0ns 70mA ORDERING INFORMATION DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 20-Pin Plastic DIP N74F245N SOT146-1 20-Pin Plastic SO N74F245D SOT163-1 20-Pin Plastic SSOP Type II N74F245DB SOT339-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0–A7, B0–B7 Data inputs 3.5/1.0 70 µA/0.6mA OE Output Enable input (active Low) 1.0/2.0 20 µA/1.2mA T/R Transmit/Receive input 1.0/2.0 20 µA/1.2mA A0–A7 A port outputs 150/40 3.0mA/24mA B0–B7 B port outputs 750/106.7 15mA/64mA 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 B2 B3 B4 B5 16 15 14 13 23 4 VCC = Pin 20 GND = Pin 10 SF00199 B1 17 B0 18 19 1 OE T/R A0 A1 A2 A3 A4 A5 56 7 B6 B7 12 11 A6 A7 89 IEC/IEEE SYMBOL SF00200 G3 19 3EN1 (BA) 1 3EN1 (AB) ∇ 1 2 ∇ 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 |
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