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February 2005

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LOW VOLTAGE POWER SUPPLY DOWN TO

3V

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8 CONSTANT CURRENT OUTPUT

CHANNELS

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ADJUSTABLE OUTPUT CURRENT

THROUGH EXTERNAL RESISTOR

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SERIAL DATA IN/PARALLEL DATA OUT

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SERIAL OUT CHANGES STATE ON THE

FAILING EDGES OF CLOCK

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3.3V MICRO DRIVER-ABLE

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OUTPUT CURRENT: 15-90 mA

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25 MHz CLOCK FREQ.

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AVAILABLE IN HIGH THERMAL EFFICIENCY

TSSOP EXPOSED PAD

DESCRIPTION

The STP8CL596 is a monolithic, medium-voltage,

low current power 8-bit shift register designed for

LED panel display.

The

STP8CL596

contains

a

8-bit

serial-in,

parallel-out shift register that feeds a 8-bitD-type

storage register. In the output stage, sixteen

regulated current sources were designed to

provide 15-90mA constant current to drive the

LEDs.

Compared with the STPIC6C595, the device

provides

great

flexibility

and

improved

performance in LED panel system design.

Trough an external resistor, users may adjust the

STP8CL596 output current, controlling in this way

the light intensity of LEDs.

The STP8CL596 guarantees 16V output driving

capability, allowing users to connect more LEDs in

series. The high clock frequency, 25 MHz, also

satisfies the system requirement of high volume

data transmission. The 3.3V of voltage supply is

well useful for applications that interface any micro

from 3.3V to 5.5V. Compared with a standard

TSSOP package, the TSSOP exposed pad

increases heat dissipation capability by a 2.5

factor.

Table 1: Order Codes

Part Number

Temp. Range

Package

Comments

STP08CL596B1

-40°C to 125°C

DIP-16

25 part per tube

STP08CL596M

-40°C to 125°C

SO-16 (Tube)

50 parts per tube

STP08CL596MTR

-40°C to 125°C

SO-16 (Tape & Reel)

1000 parts per reel

STP08CL596TTR

-40°C to 125°C

TSSOP16 (Tape & Reel)

2500 parts per reel

STP08CL596

LOW VOLTAGE 8-BIT CONSTANT

CURRENT LED SINK DRIVER

SO-16

DIP-16

TSSOP16

Rev. 8