INTEGRATED CIRCUITS
74ALS645A/74ALS645A–1 Octal transceiver (3–State)
Product specification IC05 Data Handbook 1991 Jun 03
Philips Semiconductors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-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 A4 2 3 4 5 6 7 8 9 20 VCC 19 OE 18 B0 17 B1 1.
Octal transceiver
INTEGRATED CIRCUITS
74ALS645A/74ALS645A–1 Octal transceiver (3–State)
Product specification IC05 Data Handbook 1991 Jun 03
Philips Semiconductors
Philips Semiconductors
Product specification
Octal transceiver (3-State)
74ALS645A/74ALS645A-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 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
• The -1 version sinks 48mA IOL within the +5% VCC range
DESCRIPTION
The 74ALS645A 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 74ALS645A-1 is the same as the 74ALS645A 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
A5 A6 A7
GND 10
SF00198
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS645AN, 74ALS645A-1N 74ALS645AD, 744ALS645A-1D DRAWING NUMBER
TYPE 74ALS645A 74ALS645A-1
SOT146-1 SOT163-1
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 (active-Low) Transmit/receive i.