TB62709NG/FG

2006-06-14

3

PIN FUNCTIONS

PIN NUMBER

PIN NAME

FUNCTION

1

5 V power pin.

2

DATA−IN (DI)

Serial data input pin.

3

CLOCK (CK)

Clock input pin. The shift register shifts data on the clock's rising edge.

4

LOAD (LD)

load register the is selected from among the Duty Register, the Decode & Digit Register, or

to the same registers just described, which are read on the load signal's falling edge.

5~12

OUT−A to

OUT−Dp

Segment drive output pins. The A to Dp outputs correspond to the seven segments. These

pins output constant sink current. Connect each of these pins to the corresponding LED's

cathode.

13, 21

P−GND

Ground pins, There are two which can be used to ground the output OUT−A to OUT−Dp pins.

14

TEST−IN2

Product test pin. In normal use, be sure to connect to ground.

15

TEST−IN1

Product test pin. In normal use, be sure to connect to ground.

16, 17, 19, 20

DIG−0 to DIG−3

Digit output pins. Each of these pins can control one of the four seven−segment digits in a

display.

LED anodes.

18

Power pin for digit output.

22

R−EXT

Current setting pin for the OUT−A to OUT−Dp pins. Connect a resistor between this pin and

ground when setting the current.

23

DATA−OUT (DO) Serial data output pin. Use when TB62709NG or TB62709FG devices are used in cascade

connections.

24

L−GND

Ground pin for logic and analog circuits.