1 Features
• Low rDS(on): 1Ω (Typical)
• Output short-circuit protection
• Avalanche energy: 75mJ
• Eight 350mA DMOS outputs
• 50V switching capability
• Devices are cascadable
• Low power consumption

2 Applications
• Instrumentation Clusters
• Tell-Tale Lamps
• LED Illumination and Controls
• Automotive Relay or Solenoids Drivers

3 Description
The TPIC6A595 is a monolithic, high-voltage, highcurrent
power logic 8-bit shift register designed for
use in systems that require relatively high load power.
The device contains a built-in voltage clamp on
the outputs for inductive transient protection. Power
driver applications include relays, solenoids, and
other medium-current or high-voltage loads. Each
open-drain DMOS transistor features an independent
chopping current-limiting circuit to prevent damage in
the case of a short circuit.
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 shiftregister
clock (SRCK) and the register clock (RCK),
respectively. The storage register transfers data to
the output buffer when shift-register clear (SRCLR)
is high. Write data and read data are valid only
when RCK is low. When SRCLR is low, the input
shift register is 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. The serial output (SER OUT) allows
for cascading of the data from the shift register to
additional devices.
Outputs are low-side, open-drain DMOS transistors
with output ratings of 50V and a 350mA continuous
sink-current capability. 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.
Separate power ground (PGND) and logic ground
(LGND) terminals are provided to facilitate maximum
system flexibility. All PGND terminals are internally
connected, and each PGND terminal must be
externally connected to power system ground in
order to minimize parasitic impedence. A single-point
connection between LGND and PGND must be made
externally in a manner that reduces crosstalk between
the logic and load circuits.
The TPIC6A595 is offered in a thermally-enhanced
due-in-line (NE) package and a wide-body
surface-mount (DW) package. The TPIC6A595 is
characterized for operating over the operating case
termperau range of -40 to 125°C.