The TPIC6C596 device is a monolithic, medium-voltage,
low-current, 8-bit shift register designed for use in systems that require relatively moderate load
power such as LEDs. The device contains a built-in voltage clamp on the outputs for inductive
transient protection. Power driver applications include relays, solenoids, and other low-current or
medium-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 is transparent 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 will provide improved performance for
applications where clock signals may 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 33 V and 100 mA
continuous sink-current capability. Each output provides a 250-mA maximum current limit at
TC = 25°C. The current limit decreases as the junction temperature increases
for additional device protection. The device also provides up to 2500 V of ESD protection when
tested using the human body model and the 200-V machine model.
The TPIC6C596 device is characterized for operation over the operating case temperature
range of –40°C to 125°C.
