U4256BM-RSG3

更新时间： 2024-01-24 23:18:47

品牌	Logo	应用领域
爱特美尔 - ATMEL		商用集成电路光电二极管信息通信管理异步传输模式 ATM
页数	文件大小	规格书
19页	386K
描述
Frequency Synthesizer for Radio Tuning

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U4256BM-RSG3 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	LSSOP,
针数：	20	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.68
Is Samacsys：	N	商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	R-PDSO-G20	长度：	6.625 mm
功能数量：	1	端子数量：	20
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：	LSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
认证状态：	Not Qualified	座面最大高度：	1.45 mm
最大供电电压 (Vsup)：	12 V	最小供电电压 (Vsup)：	8 V
表面贴装：	YES	技术：	BICMOS
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
宽度：	4.4 mm	Base Number Matches：	1

Features

• Reference Oscillator up to 15 MHz (Tuned)

• Oscillator Buffer Output (for AM Up/Down Conversion)

• Two Programmable 16-bit Dividers

• Fine-tuning Steps Possible

• Fast Response Time due to Integrated Loop Push-pull Stage

• 3-wire Bus (Enable, Clock and Data; 3 V and 5 V Microcontrollers Acceptable)

• Four Programmable Switching Outputs (Open Drain)

• Three DACs for Software Controlled Tuner Alignment

• Low-power Consumption

• High S/N Ratio

• Integrated Band Gap – only One Supply Voltage Necessary

Frequency

Synthesizer for

Radio Tuning

Description

The U4256BM-R is a synthesizer IC for FM receivers and an AM up-convertion

system in BICMOS technology. Together with the AM/FM IC T4258 or U4255BM, it

performs a complete AM/FM car radio front-end, which is recommended also for RDS

(Radio Data System) applications. It is controlled by a 3-wire bus and also contains

switches and Digital to Analog Converters (DACs) for software-controlled alignment of

the AM/FM tuner. The U4256BM-R is the pin-compatible succesor IC of U4256BM-N.

U4256BM-R

Preliminary

Pin Configuration

Figure 1. Pinning SSO20

Rev. 4562C–AUDR–08/04

12 3 4 5 6 7...19

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