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PEF24902H

?Quad ISDN Echocancellation Circuit Analog Front End - 2B1Q/4B3T Code?

Manufacturer : Infineon Technologies Corporation
Package/Case : QFP
Product Categories : Integrated Circuits (ICs)
Datasheet: PEF24902H Datasheet (PDF)
RoHs Status: Lead free/RoHS Compliant
In-stock: 210

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PEF24902H Product Details

All timing signals are derived from a 15.36 MHz system clock. The 15.36 MHz clock can be provided by the IEC-4-AFE-X Version 3.2 by a crystal based PLL, which is synchronized to either an 8 kHz or a 2048 kHz clock at pin CLOCK. The frequency at pin CLOCK is detected automatically. 

The PLL is set to the nominal frequency either by a POR or by a falling edge at the RES pin. When the reference clock (CLOCK) is applied, the PLL starts to synchronize. 

The 15.36 MHz clock can also be provided externally at pin CL15 without making use of the internal PLL. In this mode the pin XIN must be tied to either VDD or GND. An internal power-on-reset circuitry assures that the pin CL15 is an input until a 15.36 MHz clock is detected at the output of the PLL/oscillator. 

To enable error-free data transport to/from the Quad IEC DFE-T/Q, the clocks DCL and FSC from the IOM®-2-interface must be synchronous to the 15.36 MHz signal. Therefore it is recommended to use the same signal for FSC and as input to CLOCK pin at the IEC4-AFE-X Version 3.2 when the internal PLL is used to generate the 15.36 MHz clock. 

If another clock source is used for CLOCK, e.g. the 2048 kHz DCL, a common time base must be guaranteed. This is usually achieved if FSC is derived from DCL by dividing it directly by 256. 

Any constant phase difference between the time bases of both clocks is possible, but the devices have currently been qualified and released only for using the same FSC signal for the Quad IEC DFE-T/Q and for IEC-4-AFE-X Version 3.2.

PEF24902H

Feature

• Four port ISDN Echo Cancellation Circuit Analog Frontend 

• Offers all features of AFE V2.1 

• Integrated digital transmit low-pass filter, which obsoletes the need for an discrete, passive splitter device 

• Conforms in connection with GEMINAX MAX chip set to Ref [3.], especially to the following ISDN PSD masks: 

- ’PSD mask for a 4B3T ISDN system with integrated splitter’ acc. to Ref [3.] (4B3T ADSL friendly, compatible to ADSL US spectrum down to 138 kHz) 

- ’PSD mask for a 2B1Q ISDN system with integrated splitter’ acc. to Ref [3.] (2B1Q ADSL friendly, compatible to ADSL US spectrum down to 120 kHz) 

• Footprint compatible to AFE V2.1 (Ref [1.]) 

• Serial control interface for communication with GEMINAX MAX chip set

PEF24902H Pinout
(Picture: Pinout)

PEF24902H Block Diagram
(Picture: Diagram)

Technical Parameters

  • Manufacturer
  • INFINEON
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free/RoHS Compliant
  • Package/Case
  • QFP

PEF24902H Datasheet

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Q: How does Jotrin guarantee that PEF24902H is the original manufacturer or agent of INFINEON?
We have a professional business development department to strictly test and verify the qualifications of INFINEON original manufacturers and agents. All INFINEON suppliers must pass the qualification review before they can publish their PEF24902H devices; we pay more attention to the channels and quality of PEF24902H products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
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Q: What is the process for returns or replacement of PEF24902H?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the PEF24902H we delivered, we will accept the replacement or return of the PEF24902H only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of PEF24902H.
(3)The PEF24902H is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Infineon Technologies Corporation

Infineon
Infineon is a leading global designer, manufacturer and supplier of a broad range of semiconductors used in various microelectronic applications. Infineon's product portfolio consists of logic products, including digital, mixed-signal, and analog integrated circuits, as well as discrete semiconducto...
Infineon Technologies Corporation

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