SM5905AF

更新时间： 2024-02-08 10:58:14

品牌	Logo	应用领域
NPC		存储消费电路商用集成电路控制器
页数	文件大小	规格书
35页	198K
描述
compression and non compression type shock-proof memory controller

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技术参数
数据手册

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SM5905AF 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	QFP, QFP44,.5SQ,32	Reach Compliance Code：	unknown
风险等级：	5.68	商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	S-PQFP-G44	端子数量：	44
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	QFP
封装等效代码：	QFP44,.5SQ,32	封装形状：	SQUARE
封装形式：	FLATPACK	电源：	5 V
认证状态：	Not Qualified	子类别：	Other Consumer ICs
最大压摆率：	20 mA	表面贴装：	YES
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.8 mm	端子位置：	QUAD
Base Number Matches：	1

SM5905AF 数据手册

SM5905AF

compression and non compression type

shock-proof memory controller

NIPPON PRECISION CIRCUITS INC.

Overview

The SM5905AF is a compression and non com-

pression type shock-proof memory controller LSI for

compact disc players. The compression level can

be set in 4 levels, and external 4M DRAM can be

connected to expand the memory to 4M bits. Digital

attenuator, soft mute and related functions are also

incorporated. It operates from a 4.5 to 5.5 V supply

voltage range.

Features

- 2-channel processing

⋅ Data residual detector:

- Serial data input

15-bit operation, 16-bit output

⋅ Digital attenuator

8-bit setting

⋅ 2s complement, 16-bit/MSB first, right-justified

format

⋅ Wide capture function

⋅ Soft attenuator function

(up to 3 × speed input rate)

- System clock input

Noiseless attenuation-level switching

(256- step switching in 23 ms max.)

⋅ Soft mute function

⋅ 384fs (16.9344 MHz)

- Shock-proof memory controller

⋅ ADPCM compression method

⋅ 4-level compression mode selectable

4-bit compression mode 2.78 s/Mbit

6-bit compression mode 1.85 s/Mbit

8-bit compression mode 1.39 s/Mbit

Full-bit non compression mode 0.74 s/Mbit

⋅ External DRAM configurations usable

2 × 4M DRAM (1M × 4 bits)

Internal and External 4M DRAM

1 × 4M DRAM (1M × 4 bits)

Only Internal 4M DRAM

Mute ON in 23 ms max.

Direct return after soft mute release

⋅ Forced mute

- Extension I/O

Microcontroller interface for external control

using 4 extension I/O pins

- +4.5 to + 5.5 V operating voltage range

- Schmitt inputs

All input pins (including I/O pins) except CLK

(system clock)

- Reset signal noise elimination

Approximately 3.8 µs or longer (65 system

clock pulses) continuous LOW-level reset

- Digital audio interface (DIT)

- 44-pin QFP package (0.8 mm pin pitch)

- Compression mode selectable

- Microcontroller interface

⋅ Serial command write and status read-out

Ordering Information

SM5905AF 44pin QFP

NIPPON PRECISION CIRCUITS-1

12 3 4 5 6 7...35

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