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CS61584A 데이터시트(PDF) 15 Page - Cirrus Logic |
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CS61584A 데이터시트(HTML) 15 Page - Cirrus Logic |
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15 / 54 page ![]() CS61584A DS261PP5 15 DS261PP5 2. OVERVIEW The CS61584A is a dual line interface for T1/E1 applications, designed for high-volume cards where low power and high density are required. The device can be operated in either Hardware mode using control pins or in Host mode using an internal register set. One board design can support all T1/E1 short-haul modes by only changing com- ponent values in the receive and transmit paths (if REFCLK and TCLK are connected externally). Figure 13 illustrates applications of the CS61584A in various environments. The line driver generates waveforms compatible with E1 (CCITT G.703), T1 short haul (DSX-1) and T1 FCC Part 68 Option A (DS1). A single transformer turns ratio is used for all waveform types. The driver internally matches the impedance of the load, providing excellent return loss to insure superior T1/E1 pulse quality. An additional benefit of the internal impedance matching is a 50 percent reduction in power consumption compared to im- plementing return loss using external resistors that causes the transmitter to drive the equivalent of two line loads. ASYNCHRONOUS MUX APPLICATION (i.e., VT1.5 card for SONET or SDH mux) LOOP TIMED APPLICATION SYNCHRONOUS APPLICATION (Including 62411 systems with multiple T1 lines) TTIP TPOS TNEG RNEG TRING RPOS RRING RTIP CS62180B FRAMER JITTER ATTENUATOR CS61584A LINE DRIVER LINE RECEIVER RECEIVE CIRCUITRY TRANSMIT CIRCUITRY RCLK TCLK REFCLK TTIP TDATA RDATA TRING LINE DRIVER AMI B8ZS, HDB3, CODER RRING RTIP MUX CS61584A JITTER ATTENUATOR REFCLK RCLK TCLK (gapped) TTIP TPOS TNEG RNEG TRING RPOS RRING RTIP CS62180B FRAMER JITTER ATTENUATOR CS61584A LINE DRIVER LINE RECEIVER RCLK TCLK REFCLK AIS DETECT LINE RECEIVER RECEIVE CIRCUITRY TRANSMIT CIRCUITRY RECEIVE CIRCUITRY TRANSMIT CIRCUITRY Figure 13. Examples of CS61584A Applications CS61584A DS261F1 15 |
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