LC78845Q 데이터시트 PDF

LC78845Q 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



전체 10 페이지수

미리보기를 사용할 수 없습니다

Ordering number : EN*5236

CMOS LSI

LC78845Q

Sample Rate Converter for Digital Audio

Preliminary

Overview

The LC78845Q is a synchronous sample rate converter for

digital audio signals.

Features

• Converts data sampled at 32 or 48 kHz to 44.1-kHz

sampled data.

• Passes 44.1-kHz sampled data trough without change.

• Supports 384fs and 512fs system clock rates.

• 8× oversampling filters

• Soft muting function

• Built-in PLL circuit

Package Dimensions

unit: mm

3156-QFP48E

[LC78845Q]

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Maximum supply voltage

I/O voltages

Operating temperature

Storage temperature

Symbol

VDD max

VI, VO

Topr

Tstg

Conditions

DC Characteristics

Parameter

Input voltage range

Input high-level voltage

Input low-level voltage

Output high-level voltage

Output low-level voltage

Symbol

VIN

VIH

VIL

VOH

VOL

Conditions

Ta = –30 to +70°C

IOH = –1 µA

IOL = 1 µA

This LSI can easily use CCB that is SANYO’s original bus format.

SANYO: QIP48E

Ratings

–0.3 to +7.0

–0.3 to VDD + 0.3

–30 to +70

–55 to +125

Unit

V

V

°C

°C

min

0

0.7 VDD

VDD – 0.05

typ max Unit

VDD

V

V

0.3 VDD

V

V

VSS + 0.05

V

• CCB is a trademark of SANYO ELECTRIC CO., LTD.

• CCB is SANYO’s original bus format and all the bus

addresses are controlled by SANYO.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN

22896HA (OT) No. 5236-1/10

Pin Assignment

LC78845Q

Although the DVDD and AVDD pins in this IC are given different names to correspond to the internal circuit structure,

they are connected internally through the circuit substrate. As a result, if different voltages are applied to these pins,

abnormal currents will flow in the chip. Since this can cause latchup, power supplies with identical voltages and identical

power-on timings must be used.

Pin Functions

Pin No.

1

2

3

4

5

6

7

8

9

Symbol

MKSEL

INITB

MCK1

BCLKI

DGND

DGND

DVDD

LRCKI

DATAI

Overview

DF master clock selection

Reset input

DF master clock input

Audio signal input

Digital system ground

Digital system ground

Digital system power supply

Audio signal input

Low: 384fs, high: 512fs

Low: initialization operation

Function

Audio signal bit clock input pin

Audio signal left/right clock and data input pins

10

CCB

Serial input format specification

Selects the input format for data from the microprocessor input pins.

11

SPSEL

Serial/parallel control

Allows certain of the setting pins to be set from serial data over the

microprocessor interface.

Low: serial, high: parallel (states set by input pins)

Continued on next page.

No. 5236-4/10

LC78845Q

Input and Output Formats

1. Input format

Audio data is input through the audio data input pins (BCLKI, LRCKI, and DATAI) in the following format.

MKSEL = L: fBCK = 48fs

MKSEL = H: fBCK = 64fs

2. Output format 1

Audio data is output through the audio data output pins (BCLKO, WCLKO, LRCKO, and DATAO) in the following

format.

BCLKO = 64fs (fixed)

LRCKO = fs (fixed)

WCLKO = 2fs (fixed)

3. Output format 2 (When the input fs is 44.1 kHz)

When data sampled at 44.1 kHz is input, that data is output directly without change. The WCLKO output is held low

in this case.

No. 5236-7/10

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.