Datasheet > PBL38541

PBL38541

更新时间： 2024-09-19 22:44:35

品牌	Logo	应用领域
爱立信 - ERICSSON		/
页数	文件大小	规格书
14页	280K
描述
Universal Speech Circuit

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数据手册

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PBL38541 数据手册

PBL 385 41

November 1998

PBL 385 41

Universal Speech Circuit

Key features.

Description.

PBL 38541 is a monolithic integrated speech transmission circuit for use in

•

Minimum number of external

components, with two filtered DC-

supplies, 7 capacitors and 11

resistors.

Easy adaption to various market

needs.

Mute control input for operation with

DTMF - generator.

A separate signaling input for

payphoneand DTMFtonescontrolled

by mute.

Transmitter and receiver gain

regulation for automatic loop loss

compensation.

Extended current and voltage range

4 - 130 mA, down to 2 .2V.

electronic telephones or in any other line interface application. High settable supply

current for auxiliary functions, up to 6.0 mA (at high line currents). The circuit is designed

to accomodate either a low impedance dynamic or an electret microphone. Microphone

can be muted separately. Payphone signaling and DTMF dialling tones have a separate

input that is controlled by a mute signal. A signal summing point is available at the

transmitter input. An internally preset line length compensation can be adjusted with

external resistors to fit into different current feed systems as for ex. 48 V, 2 x 200 ohms,

48 V, 2 x 400 ohms and 48 V, 2 x 800 ohms. The line length compensation can be shut

off in either high or low gain mode. Application dependent parameters such as line

balance, side tone level, transmitter and receiver gains and frequency responces are set

independently by external components which means an easy adaption to various market

needs. The setting of the parameters if carried out in certain order will counteract the

interaction between the settings. The circuit provides four different DC - supplies to feed

microphones,diallersandothermorecurrentconsumingfunctionslikehandsfreesystems.

•

Pin numbers in this datasheet refer to 18-pin DIP package unless otherwhise noted.

Differentialmicrophoneinputforgood

balance to ground.

•

Balanced receiver output stage.

One stabilized DC - supply for low

current CMOS diallers and or electret

microphones. One settable current

limitedsupplywith6mA max.current.

Short start up time.

PBL 385 41

DTMF

input

•

Excellent RFI performance.

18-pinDIPand20-pinSOpackages.

Mic.

Telephone

line

DC-supply

Mute

(active low)

DC1- output for

external devices

DC2 - output for

external devices

Gain

regulation

PBL 385 41

20-pin plastic SO

1. Impedance to the line and radio interference suppression

2. Transmitter gain and frequency responce network

3. Receiver gain and frequency responce network

4. Sidetone balance network

PBL 385 41

5. DC supply components

18-pin plastic DIP

Figure 1. Functional diagram DIP package.

12 3 4 5 6 7...14

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与PBL38541相关器件

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PBL385411N	ERICSSON	获取价格	Universal Speech Circuit
PBL385411SO	ERICSSON	获取价格	Universal Speech Circuit
PBL385411SO-T	ERICSSON	获取价格	Universal Speech Circuit
PBL38541N	ERICSSON	获取价格	Telephone Speech Circuit, PDIP18, PLASTIC, DIP-18
PBL38541SO	ERICSSON	获取价格	Telephone Speech Circuit, PDSO20, SO-20
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PBL38570	ERICSSON	获取价格	Universal Speech Circuit
PBL385701N	ERICSSON	获取价格	Universal Speech Circuit
PBL385701SO	ERICSSON	获取价格	Universal Speech Circuit
PBL385701SOT	ERICSSON	获取价格	Universal Speech Circuit

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