73K224AL

更新时间： 2024-01-03 21:40:41

品牌	Logo	应用领域
东电化 - TDK		调制解调器
页数	文件大小	规格书
26页	274K
描述
V.22, V.21, Bell 212A, Bell 103 Single-Chip Modem with Integrated Hybrid

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

73K224AL 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP,	针数：	22
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.04	其他特性：	FULL DUPLEX
数据速率：	2.4 Mbps	JESD-30 代码：	R-PDIP-T22
长度：	27.686 mm	功能数量：	1
端子数量：	22	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：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	认证状态：	Not Qualified
座面最大高度：	5.08 mm	标称供电电压：	5 V
表面贴装：	NO	电信集成电路类型：	MODEM
温度等级：	INDUSTRIAL	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
宽度：	10.16 mm	Base Number Matches：	1

73K224AL 数据手册

73K222BL

V.22, V.21, Bell 212A, Bell 103

Single-Chip Modem with Integrated Hybrid

DESIGN CONSIDERATIONS

APPLICATIONS INFORMATION (continued)

TDK Semiconductor's 1-chip modem products

include all basic modem functions. This makes these

DIRECT ACCESS ARRANGEMENT (DAA)

The DAA (Direct Access Arrangement) required for

the 73K222BL consists of an impedance matching

resistor, telecom coupling transformer, and ring

detection and fault protection circuitry.

devices adaptable for use in

variety of

applications, and as easy to control as conventional

digital bus peripherals.

Unlike digital logic circuitry, modem designs must

properly contend with precise frequency tolerances

and very low level analog signals, to ensure

acceptable performance. Using good analog circuit

design practices will generally result in a sound

design. Following are additional recommendations

which should be taken into consideration when

starting new designs.

The transformer specifications must comply with the

impedance of the country in which the modem is

being operated. Transformers designed specifically

for use with the telephone network should be used.

These may present a DC load to the network

themselves (a “wet” transformer) or they may require

AC coupling with a DC load provided by additional

devices (a “dry” transformer). A dry transformer will

generally provide higher performance and smaller

size than a wet transformer. A wet transformer

allows a simpler design, but must not saturate with

the worst case DC current passing through it or

distortion and poor performance will result.

The protection circuitry typically consists of a transient

suppression device and current limiter to protect the

user and the telephone network from hazardous

voltages that can be present under fault conditions.

The transient suppressor may be a MOV (metal oxide

varistor), Sidactor (Teccor Electronics Inc.), spark gap

device , or avalanche diode. Some devices clamp the

transient to their specified break down voltage and

others go into low impedance crowbar state. The

latter require that the fault current to cease before

they can return to their inactive state.

Current limiting devices can consist of a resistor,

Raychem PolySwitch resettable fuse, or slow blow

fuse that can withstand the transient tests without

permenant damage or replacement.

Ring detection circuitry is not required by the FCC,

but may be required by the application. The ring

detector usually consists of an optoisolator,

capacitor, and resistor to present the proper AC load

to the network to meet the REN (Ring Equivalency

Number) regulations of FCC Part 68. The K-Series

Design Manual contains detailed information on the

design of a ring detect circuits as well as the other

topics concerning the DAA.

CRYSTAL OSCILLATOR

The K-Series crystal oscillator requires a parallel

mode (antiresonant) crystal which operates at

11.0592 MHz. It is important that this frequency be

maintained to within ±0.01% accuracy.

In order for a parallel mode crystal to operate

correctly and to specification, it must have a

capacitor connected to the junction of each of the

crystal and internal inverter connections, terminated

to ground. The values of these capacitors depend

primarily on the crystal’s characteristics, and to a

lesser degree on the internal inverter circuit. The

values used affect the accuracy and start up

characteristics of the oscillator.

LAYOUT CONSIDERATIONS

Good analog/digital design rules must be used to

control system noise in order to obtain highest

performance in modem designs. The more digital

circuitry present on the PC board, the more this

attention to noise control is needed. The modem

should be treated as a high performance analog

device. A 22 µF electrolytic capacitor in parallel with a

0.1 µF ceramic capacitor between VDD and GND is

recommended. Liberal use of ground planes and larger

traces on power and ground are also highly favored.

High speed digital circuits tend to generate a significant

amount of EMI (Electro-Magnetic Interference) which

must be minimized in order to meet regulatory agency

limitations. To accomplish this, high speed digital

devices should be locally bypassed, and the telephone

line interface and K-Series device should be located

close to each other near the area of the board where

the phone line connection is accessed.

1...19 20 212223 24 25 26

中文翻译

下载PDF

与73K224AL相关器件

型号	品牌	获取价格	描述	数据表
73K224BL	TDK	获取价格	V.22, V.21, Bell 212A, Bell 103 Single-Chip Modem with Integrated Hybrid
73K224BL	TERIDIAN	获取价格	Single-Chip Modem w/ Integrated Hybrid
73K224BL-32IH	TDK	获取价格	Modem, 2.4kbps Data, PQCC32, PLASTIC, LCC-32
73K224BL-IGT	ETC	获取价格	Single-Chip Modem w/ Integrated Hybrid
73K224BL-IH	ETC	获取价格	Single-Chip Modem w/ Integrated Hybrid
73K224BL-IH/F	TERIDIAN	获取价格	Single-Chip Modem w/ Integrated Hybrid
73K224BL-IHR/F	TERIDIAN	获取价格	Single-Chip Modem w/ Integrated Hybrid
73K224L	TERIDIAN	获取价格	Single-Chip Modem
73K224L	TDK	获取价格	V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem
73K224L-28IH	TDK	获取价格	V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem

与73K224AL相关文章

压敏电阻器在直流电路中的过压保护应用探讨
2024-06-07

2
电感耐压值及其与电感大小的关系
2024-06-07

5
CNY17F光耦合器：特性、应用、封装、引脚功能及替换型号解析
2024-06-07

4
DS1307资料解析：特性、引脚说明、替代推荐
2024-06-07

3

产品中心

服务支持

精选活动

关于我们

帮助中心

73K224AL

73K224AL 技术参数

73K224AL 数据手册

与73K224AL相关器件

与73K224AL相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

73K224AL

73K224AL 技术参数

73K224AL 数据手册

与73K224AL相关器件

与73K224AL相关文章

您还可以找

您在本页遇到什么问题？