SN74LS620

The SN74LS620 is a type of octal bus transceiver, which is designed for asynchronous two-way communication betw een data buses. The control function implementation accepts for maximum flexibility in timing. The SN74LS620 allows data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic levels at the enable inouts.

Features of SN74LS620 are: (1)bidrectional bus transceiver in high-density 20-pin package; (2)local bus-latch capab ility; (3)hysteresis at bus inputs improves noise margins; (4)choice of true or inverting logic;(5)choice of 3-state or open collector outputs.

The absolute maximum ratings and electrical characteristics of the SN74LS620 can be summarized as: (1)supply volt age: 7V; (2)input voltage: 7V;(3)operating free, air temperature range:0 to 70;(4)storage temperature rang:-65 to 150; (5)off-state output voltage: 5.5V. Electrical characteristics: (1)high-level input voltage: 2V min; (2)low-level input voltage: 0.6V max; (3)input clamp voltage(VCC=min, I1=-18mA): -1.5V max; (4)low level input current(VC C=max, V1=0.4V):-0.4mA max; (5)short-circuit output current(VCC=max):-40mA min and -225mA max, etc.