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AM79574-1JC датащи(PDF) 1 Page - Advanced Micro Devices |
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AM79574-1JC датащи(HTML) 1 Page - Advanced Micro Devices |
1 / 17 page Publication# 16855 Rev: E Amendment: /0 Issue Date: October 1999 Am79574 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS s Programmable constant resistance feed s Line-feed characteristics independent of battery variations s Programmable loop-detect threshold s On-chip switching regulator for low-power dissipation s Pin for external ground-key noise filter capacitor available s Ground-key detect option available s Two-wire impedance set by single external impedance s Polarity reversal feature s Tip Open state for ground-start lines s Test relay driver optional s On-hook transmission BLOCK DIAGRAM VTX RD RDC C1 C2 C3 C4 E1 E0 Input Decoder and Control Two-Wire Interface Switching Regulator Test Relay Driver Ring Relay Driver RINGOUT TESTOUT GKFIL A(TIP) HPA HPB DA DB L BGND CHS CHCLK AGND 16855C-001 Signal Transmission Power-Feed Controller Off-Hook Detector Ground-Key Detector Ring-Trip Detector DET Notes: 1. Am79574—E0 and E1 inputs; ring and test relay drivers sourced internally to BGND. 2. Output amplifier current gain (K1) = 1000. RSN B(RING) VREG VBAT QBAT VCC VEE |
Аналогичный номер детали - AM79574-1JC |
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Аналогичное описание - AM79574-1JC |
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