74F245 Datasheet | Philips Semiconductors

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