Quad High Current Peripheral Driver

The DS3669 is a non-inverting quad peripheral driver similar to the DS3658. These drivers are designed for those appli- cations where low operating power, high breakdown volt- age, high output current and low output ON voltage are re- quired. A unique input circuit combines TTL compatibility with high impedance. In fact, its extreme low input current allows it to be driven directly by a CMOS device. The outputs are capable of sinking 600 mA each and offer a 70V breakdown. However, for inductive loads the output should be clamped to 35V or less to avoid latch-up during turn off (inductive fly back protectionrefer AN-213). An on- chip clamp Diode capable of handling 800 mA is provided at each output for this purpose. In addition, the DS3669 incor- porates circuitry that guarantees glitch-free power up or down operation. The molded package is specifically constructed to allow in- creased power dissipation over conventional packages. The four ground pins are directly connected to the device chip with a special copper lead frame. When the quad driver is soldered into a PC board, the power rating of the device improves significantly. By National Semiconductor Corporation