器件名称:
744ALS245A-1D
功能描述:
Octal transceiver 3-State
文件大小:
116.6KB 共10页
简 介:
INTEGRATED CIRCUITS 74ALS245A/74ALS245A–1 Octal transceiver (3–State) Product specification IC05 Data Handbook 1991 Jun 03 Philips Semiconductors Philips Semiconductors Product specification Octal transceiver (3-State) 74ALS245A/74ALS245A-1 FEATURES Octal bidirectional bus interface 3-State buffer outputs sink 24mA and source 15mA Outputs are placed in high impedance state during power-off conditions PIN CONFIGURATION T/R 1 A0 A1 A2 A3 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 The -1 version sinks 48mA DESCRIPTION The 74ALS245A is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both transmit and receive directions. The device features an output enable (OE) input for easy cascading and transmit/receive (R/T) input for direction control. The 74ALS245A-1 is the same as the 74ALS245A except that both ports sink 48mA within the ±5% VCC range. TYPICAL PROPAGATION DELAY 7.0ns 7.0ns TYPICAL SUPPLY CURRENT (TOTAL) 34mA 34mA 20-pin plastic DIP 20-pin plastic SOL 20-pin plastic SSOP Type II A4 A5 A6 A7 GND 10 SF00198 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS245AN, 74ALS245A-1N 74ALS245AD, 744ALS245A-1D 74ALS245ADB, 74ALS245A-1DB DRAWING NUMBER TYPE 74ALS245A 74ALS245A-1 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 A0 – A7 B0 – B7 DESCRIPTION Data inputs Output Enable input……
