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PT6964 V1.0

- 3 -

April, 2005

LED Driver IC

PT6964

APPLICATION CIRCUIT

DIGIT1

DIGIT2

DIGIT3

DIGIT4

SEG12

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

+5V

+5V

MCU

10K

+5V

51K

DIGIT5

0.1 f

DIGIT6

OSC

DI/O

CLK

STB

K1

K2

VDD

SG1/KS1

SG2/KS2

SG3/KS3

SG4/KS4

SG5/KS5

SG6/KS6

SG7/KS7

SG8/KS8

SG9/KS9

SG10/KS10

GND

GR1

GR2

GND

GR3

GR4

GND

VDD

SG14/GR5

SG13/GR6

SG12/GR7

Note:

1. The capacitor (0.1µF) connected between the GND and the VDD pins must be located as close as

possible to the PT6964 chip.

2. It is strongly suggested that the NC pin (pins 13) be connected to the GND.

3. The PT6964 power supply is separate from the application system power supply.