STLED325 datasheet(57/62 Pages) STMICROELECTRONICS

Part #	STLED325

Description	Standby power management to host

PDF	62 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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57 / 62 page

STLED325

Application information

Doc ID 17576 Rev 1

57/62

10.3

Application diagram

Figure 22.

Application schematic

Resistors:

RSET = external resistor for current setting

R1 = 1-10 KO SDA external pull-up resistor

R2 = 1-10 KO SCL external pull-up resistor

R3 = 1-10 KO IRQ_N external pull-up resistor

R4-R5 = 10 KO external key-matrix pull-down resistors

Capacitors:

C1 = 33 µF (25 V) electrolytic

C2 = 0.01-0.1µF (25V) ceramic

Creg=0.1 uF

CL1 = CL2 = 25pF

Diodes

D1-D8 = 1N4148

Supply voltage

VCC = 5 V ± 10%

AM08725V1

Main CPU

Keyscan

(8x2 m atrix)

SCL

SDA

STLED 325

ISET

LE D 4 -D igit 7 -segm ent

(+ dot

-point)

Display panel

With som e individual LE D s

RSET

KEY1-KEY 2

SEG 1/KS 1

-SEG 8/KS8

DIG 1-DIG 4

GND

IR rem ote

control

sensor

IR _IN

IRQ _N

STBY

Crystal

(32.768KHz)

CL1

CL2

READY

DIG 5

VBAT

W AKE_UP

MUTE

VCC

Creg

STLED325 Datasheet(PDF) 57 Page - STMicroelectronics

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