Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

U3900BM Datasheet(PDF) 11 Page - TEMIC Semiconductors

Part # U3900BM
Description  Programmable Telephone Audio Processor
Download  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TEMIC [TEMIC Semiconductors]
Direct Link  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

U3900BM Datasheet(HTML) 11 Page - TEMIC Semiconductors

Back Button U3900BM Datasheet HTML 7Page - TEMIC Semiconductors U3900BM Datasheet HTML 8Page - TEMIC Semiconductors U3900BM Datasheet HTML 9Page - TEMIC Semiconductors U3900BM Datasheet HTML 10Page - TEMIC Semiconductors U3900BM Datasheet HTML 11Page - TEMIC Semiconductors U3900BM Datasheet HTML 12Page - TEMIC Semiconductors U3900BM Datasheet HTML 13Page - TEMIC Semiconductors U3900BM Datasheet HTML 14Page - TEMIC Semiconductors U3900BM Datasheet HTML 15Page - TEMIC Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 34 page
background image
U3900BM
Target Specification
Rev. A2, 25-Aug-98
11 (34)
CAS Detect Process (continued)
Improved process:
To prevent false detection from speech and music by the far and the near end (talk-off), and to detect the incoming CAS
signal from the CO, polluted with speech or music by the near end (talk-down), a new feature is used: the early and
up guard time.
Interrupt
to the
µP
CAS signal duration: 80
±5 ms
frequencies: 2130 Hz + 2750 Hz mixed with speech and music frequencies
Early
guard time
Choice of 3
EGT values
IN SCWID
detector
OUT SCWID
detector
14610
Restart
3 Drops had no effect (FDD = 4 ms, FDC = 4)
Up guard time
Drops
In signal
Values permitted for drops after
a successful early guard time
Choice of 4
UGT values
Figure 10. Timing diagram for early and up guard time
Note: In the case above, the EGT counter restarts 3 times. After a sucessful 10.3-ms EGT, 3 drops occured but without
any effect because the duration and the number is less than the maximum permitted.
Interrupt
to the
µP
CAS signal duration: 80
±5 ms
frequencies: 2130 Hz + 2750 Hz mixed with speech and music frequencies
Early guard time
Choice of 3
EGT values
IN SCWID
detector
OUT SCWID
detector
14611
Restart
Down guard time
Filter values permitted for spikes
after a successful early guard time
Choice of 4
DGT values
Spikes
in signal
5 Spikes had no effect (FDD = 4 ms)
mixed with speech and music frequencies
Figure 11. Timing diagram of early and down guard time
Note: In the case above, the EGT counter restarts 3 times. After a sucessful 13.7-ms EGT, 5 spikes occured but without
any effect because the duration is less than the maximum permitted.


Similar Part No. - U3900BM

ManufacturerPart #DatasheetDescription
logo
Kersemi Electronic Co.,...
U3910 KERSEMI-U3910 Datasheet
3Mb / 10P
   Ultra Low On-Resistance
More results

Similar Description - U3900BM

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
U4091BM-R ATMEL-U4091BM-R Datasheet
789Kb / 38P
   Programmable Telephone Audio Processor
logo
TEMIC Semiconductors
U4091BM TEMIC-U4091BM Datasheet
722Kb / 29P
   Programmable Telephone Audio Processor
U4091B TEMIC-U4091B Datasheet
107Kb / 11P
   Programmable Telephone Audio Processor
logo
ATMEL Corporation
U4091BM-N ATMEL-U4091BM-N Datasheet
510Kb / 38P
   PROGRAMMABLE TELEPHONE AUDIO PROCESSOR
logo
Texas Instruments
TCM8000 TI-TCM8000 Datasheet
230Kb / 19P
[Old version datasheet]   CELLULAR TELEPHONE AUDIO PROCESSOR
logo
List of Unclassifed Man...
ZR38650 ETC1-ZR38650 Datasheet
441Kb / 66P
   PROGRAMMABLE DIGITAL AUDIO PROCESSOR
logo
Zoran Corporation
ZR38601 ZORAN-ZR38601 Datasheet
77Kb / 2P
   PROGRAMMABLE DIGITAL AUDIO PROCESSOR
logo
TEMIC Semiconductors
U3500BM TEMIC-U3500BM Datasheet
226Kb / 17P
   Cordless Telephone Signal Processor
U3501BM TEMIC-U3501BM Datasheet
317Kb / 20P
   Cordless Telephone Signal Processor
logo
Sanyo Semicon Device
LA8606M SANYO-LA8606M Datasheet
483Kb / 20P
   Cordless Telephone Signal Processor
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com