The TLC6A598 device is a monolithic, high-voltage, high-current 8-bit shift register designed to drive relatively high load power such as LEDs. The device contains a built-in voltage clamp on the outputs for inductive transient protection, so it can also drive relays, solenoids, and other low-current or high-voltage loads.

This device contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. Data transfers through both the shift and storage registers on the rising edge of the shift register clock (SRCK) and the register clock (RCK) respectively. The storage register transfers data to the output buffer when shift register clear (CLR) is high. When CLR is low, all registers in the device are cleared. When output enable (G) is held high, all data in the output buffers is held low and all drain outputs are off. When G is held low, data from the storage register transfers to the output buffers. When data in the output buffers is low, the DMOS transistor outputs are off. When data is high, the DMOS transistor outputs have sink-current capability.

The serial output (SER OUT) is clocked out of the device on the falling edge of SRCK to provide additional hold time for cascaded applications. This action provides improved performance for applications where clock signals can be skewed, devices are not located near one another, or the system must tolerate electromagnetic interference.

Outputs are low-side, open-drain DMOS transistors with output ratings of 50-V and 350-mA continuous sink-current capability. The current limit decreases as the junction temperature increases for additional device protection. The device also provides up to 7000 V of ESD protection when tested using the human body model and the 1500 V machine model.