INTEGRATED CIRCUITS 74F245 Octal transceiver (3-State) Product specification 1994 Nov 15 IC15 Data Handbook Philips SemiconductorsPhilips Semiconductors Product specification Octal transceiver (3-State) 74F245 FEATURES PIN CONFIGURATION Octal bidirectional bus interface 1 20 V T/R CC 3-State buffer outputs sink 64mA 2 19 A0 OE 15mA source current 3 18 A1 B0 4 17 Outputs are placed in high impedance state during power-off A2 B1 conditions 5 16 A3 B2 6 15 A4 B3 DESCRIPTION 7 14 A5 B4 The 74F245 is an octal transceiver featuring non-inverting 3-State 8 13 A6 B5 bus compatible outputs in both transmit and receive directions. The 9 12 A7 B port outputs are capable of sinking 64mA and sourcing 15mA, B6 producing very good capacitive drive characteristics. The device 10 11 GND B7 features an Output Enable (OE) input for easy cascading and Transmit/Receive (T/R) input for direction control. The 3-State SF00198 outputs, B0B7, have been designed to prevent output bus loading if the power is removed from the device. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F245 4.0ns 70mA ORDERING INFORMATION COMMERCIAL RANGE DESCRIPTION DRAWING NUMBER V = 5V 10%, T = 0C to +70C CC amb 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 A0A7, B0B7 Data inputs 3.5/1.0 70A/0.6mA OE Output Enable input (active Low) 1.0/2.0 20A/1.2mA T/R Transmit/Receive input 1.0/2.0 20A/1.2mA A0A7 A port outputs 150/40 3.0mA/24mA B0B7 B port outputs 750/106.7 15mA/64mA NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state. LOGIC SYMBOL IEC/IEEE SYMBOL 19 G3 3EN1 (BA) 23 4 56 7 89 1 3EN1 (AB) 1 A0 A1 A2 A3 A4 A5 A6 A7 2 18 2 19 OE 3 17 1 T/R 4 16 5 15 B0 B1 B2 B3 B4 B5 B6 B7 6 14 7 13 8 12 18 17 16 15 14 13 12 11 9 11 V = Pin 20 CC GND = Pin 10 SF00199 SF00200 2 November 15, 1994 8530025 14256