Description
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For sale here we have the above…
1 Piece
20-pin plastic SO package
Description
The PBL 3852 is a universal transmission circuit in bipolar technology that performs
all the speech and line interface functions required to implement an electronic
telephone set suitable for the majority of existing telephone network requirements.
Easy adaptation of the DC-mask to different line feed systems. A summing point
for auxiliary signals to be transmitted like DTMF and hands-free audio signal. Tea
PBL 3852 has a low current consumption that enables the circuit to work with
reduced performance down to 2.1 volts (4.8 mA) across the circuit. The low current
consumption for a speech circuit is essential in telephone line powered handsfree
designs required to work at long line lengths. The PBL 3852 is especially suitable for
be used with Ericsson handsfree circuits like PBL 3786, PBL 3786/2, PBL 3881 and
PBL 3880 thanks to a specific interfacing arrangement.
The transmitting and receiving gains can be regulated in order to compensate for
the attenuation of the signals due to increasing attenuation with increasing line length.
It is also possible to limit high transmitting signal levels (soft clipping) thus preventing
excessive distortion caused by signal clipping. The gain regulation is set with discrete
external components.
The circuit is easily adapted to different markets by setting the application depending-
ent parameters individually in certain order, this preventing the interaction between
the same. PBL 3852 has up to four different power supplies to feed microphones,
auxiliary circuits and functions.
Key Features
Generates its own supply from the telephone line
Adaptive to all types of telephone line feeding systems (ie 48V 2×200Ω, 60V 2x 600Ω, 48V 2×800Ω)
Operates down to 2.1V (excl. polarity bridge)
Adjustable DC-characteristic to the line
Few inexpensive external components to function
Easy adaptation for various markets needs
Dialler interface with DC-supply, mute, power-down and DTMF-input
Confidence tone in the receiver at DTMF dialing
“Soft clipping” that prevents distortion at high transmit signal levels
Balanced microphone input for dynamic mic, and electret microphones
Balanced receiver output for dynamic and magnetic receiver elements
Transmitter and receiver gain regulated for automatic loop loss compensation (disabled in mute mode)
Four separate DC supplies for different requirements
High gain of the receiver facilitates volume control function
Microphone cut-off function possible by a switch
All gain and frequency setting networks in Rx, Tx and side tone are referred to ground
Excellent RFI performance
This genuine and original Ericsson part is now obsolete.
For datasheet search…Ericsson PBL 3852
Or go directly to…
https://pdf1.alldatasheet.fr/datasheet-pdf/view/60222/ERICSSON/PBL3852.html
PLEASE NOTE!
These parts came to us as part of a lot of surplus stock from a large ‘Mispec’ type Co. and have been kept in storage for some time, we have therefore classified them as ‘new other’, they are however pristine, stored with us sealed in original packaging, the photographs are representative of their general condition, being of some of our actual stock, and, as with all our products they come with a full guarantee.
If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.
