Datenblatt-Suchmaschine für elektronische Bauteile |
|
TP3404V Datenblatt(PDF) 10 Page - National Semiconductor (TI) |
|
|
TP3404V Datenblatt(HTML) 10 Page - National Semiconductor (TI) |
10 / 14 page Functional Description (Continued) TABLE VI Status Register Functions Byte 2 Indication 76543210 0 0 Line 3 deactivated 0 1 Line 3 line signal present but not in sync 1 0 Line 3 activated bipolar violation (Note 1) 1 1 Line 3 activated no bipolar violation 0 0 Line 2 deactivated 0 1 Line 2 line signal present but not in sync 1 0 Line 2 activated bipolar violation (Note 1) 1 1 Line 2 activated no bipolar violation 0 0 Line 1 deactivated 0 1 Line 1 line signal present but not in sync 1 0 Line 1 activated bipolar violation (Note 1) 1 1 Line 1 activated no bipolar violation 0 0 Line 0 deactivated 0 1 Line 0 line signal present but not in sync 1 0 Line 0 activated bipolar violation (Note 1) 1 1 Line 0 activated no bipolar violation Note 1 Bipolar Violation does not cause an Interrupt STATUS REGISTER Status information for all 4 channels may be read from the common Status Register by addressing location X FF 2 bits per line are coded as shown in Table VI A change in the status of 1 or more lines is indicated by the INT pin being pulled low provided bit 2 of the corresponding control regis- ter is set to ‘‘ONE’’ to enable the interrupt for that line BIPOLAR VIOLATION DETECTOR On an activated line whenever a line error is received there will be a violation of the AMI coding rule This is reported by setting the code 10 for that line The violation indication is cleared to 11 after a read of the Status Register As an example of the interpretation of the Status Register contents if the byte 2 read back from the Status Register e 00111001 (eX 39) this indicates the following status of the 4 lines line 3 is deactivated line 2 is in sync with no error since the last read cycle line 1 is in sync but there has been 1 or more errors since the last read cycle of the Status Register line 0 is receiving a line signal but the line trans- mission is not synchronized Applications Information POWER SUPPLIES While the pins of the TP3404 QDASL device are well pro- tected against electrical misuse it is recommended that the standard CMOS practice of applying GND to the device be- fore any other connections are made should always be fol- lowed In applications where the printed circuit card may be plugged into a hot socket with power and clocks already present an extra long ground pin on the connector should be used To minimize noise sources the VDDA and VDDD pins should be connected together via the shortest possible trace likewise the GNDA and GNDD pins must be connect- ed together These two connections can be done directly underneath the part All other ground connections to each device should meet at a common point as close as possible to the GNDD pin in order to prevent the interaction of ground return currents flowing through a common bus im- pedance A power supply decoupling capacitor of 01 mF should be connected from this common point to VDDD as close as possible to the device pins Figure 5 shows a typical 4 line application of the QDASL The current list of suitable commercial transformers is Schott Corporation (Nashville) Phone 615-889-8800 Part numbers 67110850 (dry) 67110860 (50 mA DC) Pulse Engineering (San Diego) Phone 619-674-8100 Part number TBD Note that the zener diode protection shown in Figure 8 is only intended as secondary protection for inside wiring ap- plications primary protection is also necessary Further in- formation can be found in the datasheet for the TP340123 DASL devices and in Application Note AN-509 ‘‘Using the TP340123 ISDN PBX Transceivers’’ 10 |
Ähnliche Teilenummer - TP3404V |
|
Ähnliche Beschreibung - TP3404V |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
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 |