GENERAL DESCRIPTION

The TC4426/4427/4428 are improved versions of the earlier TC426/427/428 family of buffer/drivers (with which they are pin compatible). They will not latch up under any conditions within their power and voltage ratings. They are not subject to damage when up to 5V of noise spiking (of either polarity) occurs on the ground pin. They can accept, without damage or logic upset, up to 500mA of reverse current (of either polarity) being forced back into their outputs. All terminals are fully protected against up to 4kV of electrostatic discharge.

FEATURES

■ High Peak Output Current ............................... 1.5A

■ Wide Operating Range .......................... 4.5V to 18V

■ High Capacitive Load

Drive Capability ........................ 1000 pF in 25 nsec

■ Short Delay Time ................................ <40nsec Typ

■ Consistent Delay Times With Changes in Supply Voltage

■ Low Supply Current

— With Logic “1” Input .................................... 4mA

— With Logic “0” Input ................................. 400µA

■ Low Output Impedance ....................................... 7Ω

■ Latch-Up Protected: Will Withstand >0.5A

Reverse Current ................................. Down to – 5V

■ Input Will Withstand Negative Inputs

■ ESD Protected .....................................................4kV

■ Pinout Same as TC426/TC427/TC428