pbl3853 ETC-unknow, pbl3853 Datasheet
pbl3853
Available stocks
Related parts for pbl3853
pbl3853 Summary of contents
Page 1
Description The PBL 3853 is a biopolar integrated speech circuit with specific parameters making it highly suitable to be used as a line interface and speech circuit in a telephone line powered electronic payphone. Emphasis has been put on low ...
Page 2
... E= 50V when artificial line is used 470 F when not used U = 15-16V z R -0- ohm when artificial line is used 5H+ 400 +400 feed 600 + 2 E= 50V PBL3853 C1 5 AC-DC char. adjust R2 Transmitter mute Mic ...
Page 3
Absolute Maximum Ratings Parameter Line voltage Continous operating line current, T amb Continous operating line current, T amb Input voltage, all inputs Operation temperature Storage temperature Electrical Characteristics T =+ cable and or line rectifier unless otherwise specified. ...
Page 4
PBL 3853 Parameter Symbol Receiver dynamic output voltage Receiver Max. output voltage Transmitter output noise Receiver output noise Mute input voltage at mute (transmit Input voltage at cut off (receive DC-supply current Note: 1. This input ...
Page 5
DCAC pin-DIP Figure 5. Pin configuration. Pin Description DIP SO Symbol Output of the transmitter (+Line side ...
Page 6
... Case c) above can not be used together with active impedance. Do not use the active impedance if not necessary, it complicates things greatly. A full mathematical expression is found under Detailed Description. +Line PBL3853 Circuit supply I=0.3mA Characteristics The DC - characteristic that a telephone set has to fulfill is mainly given by the network administrator ...
Page 7
... The total 3 4 transmitter gain can then be adjusted with the load of the electret microphone buffer amplifier. See figure 9. + Line R1 PBL3853 to gain reg. with line length 6dB) F Circuit supply I=0.3mA 7.5k 13k + 1.2V 37 ...
Page 8
PBL 3853 Detailed Description: Expressions for AC-characteristics Z is the impedance that the telephone sees in the telephone line. Z Line (see fig,15.) elements in the telephone set. R1, R2 and C Active impedance: The following expression is derived from ...
Page 9
Expression for DC-characteristics. from figure16, (empirical 1 0.14 F ....................................................................................................................................... 0. ...
Page 10
... Zbal) Hence R11 to satisfy the balancing criteria. R10 is to set the receiver gain. (can also be a volume control potentiometer.) that are in must TO 18 11k PBL3853 7. Application for lower DC- supply using the microphone amplifier as a shunt regulator. pin 18 ...
Page 11
Making any of the impedances unne- cessary high will make the circuit sen- sitive to RFI. All values given here are approximate and serve as starting enti- ties only. The final trimming of side tone network is a cut and ...
Page 12
... In case there is a need to minimize the voltage difference between line and V it can be influenced as follows. To start with, the level that sets which way the PBL3853 Circuit supply I=0.3mA 7. ...
Page 13
What can be done use more of the transmitter ouput signal for charging the VDC via the T1,. The transmitter output signal passes both R12 and R13. The transmit current that passes R12 is lost regarding the charging ...
Page 14
PBL 3853 capacitor to ground if the input tends to pick up noise. This input can also be used as a second input to the transmitter (in-impedance approx gain depending on the arrangement at pin 3) used ...
Page 15
PBL 3853 15 ...
Page 16
PBL 3853 Ordering Information Package Part No Plastic DIP PBL 3853N Plastic PBL 3853SO Plastic PBL 3853SO-T Information given in this data sheet is believed to be accurate and reliable. However no responsibility is assumed for the consequences of its ...