8-bit shift register with 150mA/ch

The TPIC6B595 device is a monolithic,

high-voltage, medium-current power 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.

This device contains an 8-bit

serial-in, parallel-out shift register that feeds an 8-bit D-type storage register.

Data transfers through 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 ( 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. 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) 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 150mA continuous sink-current capability.

Each output provides a 500mA typical current limit at TC = 25°C. The

current limit decreases as the junction temperature increases for additional device

protection.

The TPIC6B595 is characterized for

operation over the operating case temperature range of −40°C to 125°C.