DS3680  Product Folder

The DS3680 is a quad high voltage negative relay driver designed to operate over wide ranges of supply voltage, common-mode voltage, and ambient temperature, with 50 mA sink capability. These drivers are intended for switching the ground end of loads which are directly connected to the negative supply, such as in telephone relay systems.

Since there may be considerable noise and IR drop between logic ground and negative supply ground in many applications, these drivers are designed to operate with a high common-mode range (±20V referenced to negative supply ground). Each driver has a common-mode range separate from the other drivers in the package, which permits input signals from more than one element of the system.

With low differential input current requirements (typically 100 µA), these drivers are compatible with TTL, LS and CMOS logic. Differential inputs permit either inverting or non-inverting operation.

The driver outputs incorporate transient suppression clamp networks, which eliminate the need for external networks when used in applications of switching inductive loads. A fail-safe feature is incorporated to ensure that, if the + IN input or both inputs are open, the driver will be OFF.

• -10V to -60V operation
• Quad 50 mA sink capability
• TTL/LS/CMOS or voltage comparator input
• High input common-mode voltage range
• Very low input current
• Fail-safe disconnect feature
• Built-in output clamp diode