Block Diagram

No. 5606-4/13

LC75725E

Pin Functions

Pin

Pin No.

Function

I/O

Handling when unused

1, 13

Driver block power supply connection. (Both pins must be connected.)

—

—

60

Logic block power supply connection. Provide a voltage between 4.5 and 5.5 V.

—

—

57

Power supply connection. Connect to the ground.

—

—

OSCI

59

Oscillator connection. An oscillator circuit is formed by connecting an external resistor

I

GND

OSCO

58

and capacitor to these pins.

O

OPEN

Display off control input.

BLK

61

I

GND

Note that serial data can be transferred while the display is turned off.

CL

63

DI

64

I

GND

CE

62

G1 to G11

2 to 12

Digit outputs. These pins are P-channel open drain outputs with pull-down resistors.

O

OPEN

S1 to S43

56 to 14

Segment outputs for displaying the display data transferred by serial data input. These pins

O

OPEN

are P-channel open drain outputs with pull-down resistors.

Serial data transfer inputs. These pins must be connected to the system microcontroller.

CL: Synchronization clock

DI: Transfer data

CE: Chip enable