Electronic Components Datasheet Search |
|
CPC5621ATR Datasheet(PDF) 11 Page - IXYS Corporation |
|
CPC5621ATR Datasheet(HTML) 11 Page - IXYS Corporation |
11 / 18 page INTEGRATED CIRCUITS DIVISION CPC5620/CPC5621 R05 www.ixysic.com 11 half-cycle of the ringing signal for the CPC5620. For the CPC5621, the RING output returns high for a short period near the zero-crossing of the ringing signal before returning low during the positive half-cycle. For both the CPC5620 and CPC5621, the RING output remains high between ringing signal bursts. The ringing detection threshold depends on the values of R3 (RSNPD), R6 & R44 (RSNP-), R7 & R45 (RSNP+), C7 (CSNP-), and C8 (CSNP+). The value of these components shown in the application circuits are recommended for typical operation. The ringing detection threshold can be changed according to the following formula: Where: • R SNPD = R3 in the application circuits shown in this data sheet. • RSNP TOTAL = the total of R6, R7, R44, and R45 in the application circuits shown in this data sheet. • C SNP = C7 = C8 in the application circuits shown in this data sheet. • And ƒ RING is the frequency of the ringing signal. IXYS Integrated Circuits Division Application Note AN-117 Customize Caller ID Gain and Ring Detect Voltage Threshold is a spreadsheet for trying different component values in this circuit. Changing the ringing detection threshold will also change the caller ID gain and the timing of the polarity reversal detection pulse, if used. 3.2.2 Polarity Reversal Detection with CPC5621 in On-hook State The full-wave ringing detector in the CPC5621 makes it possible to detect on-hook tip and ring polarity reversal using the RING output. When the polarity of tip and ring reverses, a pulse on RING indicates the event. Your system logic must be able to discriminate this single pulse of approximately 1 msec (using the recommended snoop circuit external components) from a valid ringing signal. 3.2.3 On-hook Caller ID Signal Reception On-hook caller ID (CID) signals are processed by LITELINK by coupling the CID data burst through the snoop circuit to the LITELINK RX outputs under control of the CID pin. In North America, CID data signals are typically sent between the first and second ringing signal. In North American applications, follow these steps to receive on-hook caller ID data via the LITELINK RX outputs: 1. Detect the first ringing signal outputs on RING. 2. Assert CID low. 3. Process the CID data from the RX outputs. 4. De-assert CID (high or floating). Note: Taking LITELINK off-hook (via the OH pin) disconnects the snoop path from both the receive outputs and the RING output, regardless of the state of the CID pin. CID gain from tip and ring to RX+ and RX- is determined by: Where: • R SNPD = R3 in the application circuits in this data sheet • RSNP TOTAL = the total of R6, R7, R44, and R45 in the application circuits in this data sheet • C SNP = C7 = C8 in the application circuits in this data sheet • and where ƒ is the frequency of the CID signal The recommended components in the application circuit yield a gain 0.27 dB at 2000 Hz. IXYS Integrated Circuits Division Application Note AN-117 Customize Caller ID Gain and Ring Detect Voltage Threshold is a spreadsheet for trying different component values in this circuit. Changing the CID gain will also change the ring detection threshold and the timing of the polarity reversal detection pulse, if used. VRINGPK 750mV RSNPD ----------------- RSNP TOTAL RSNPD + 2 1 f RINGCSNP 2 -------------------------------------- + = GAINCID dB 20 6RSNPD RSNP TOTAL RSNPD + 2 1 fC SNP 2 -------------------------- + ------------------------------------------------------------------------------------------------- log = |
Similar Part No. - CPC5621ATR |
|
Similar Description - CPC5621ATR |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |