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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8308VMADDA датащи(PDF) 37 Page - Freescale Semiconductor, Inc |
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MPC8308VMADDA датащи(HTML) 37 Page - Freescale Semiconductor, Inc |
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37 / 88 page  MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 0 Freescale Semiconductor 37 PCI Express Maximum time to transition to a valid electrical idle after sending an electrical idle ordered set TTX-IDLE-SET-TO-I DLE After sending an Electrical Idle ordered set, the Transmitter must meet all Electrical Idle Specifications within this time. This is considered a debounce time for the Transmitter to meet Electrical Idle after transitioning from L0. —— 20 UI — Maximum time to transition to valid TX specifications after leaving an electrical idle condition TTX-IDLE-TO-DIFF- DATA Maximum time to meet all TX specifications when transitioning from Electrical Idle to sending differential data. This is considered a debounce time for the TX to meet all TX specifications after leaving Electrical Idle —— 20 UI — Differential return loss RLTX-DIFF Measured over 50 MHz to 1.25 GHz. 12 — — dB 4 Common mode return loss RLTX-CM Measured over 50 MHz to 1.25 GHz. 6— — dB 4 DC differential TX impedance ZTX-DIFF-DC TX DC Differential mode Low Impedance 80 100 120 Ω — Transmitter DC impedance ZTX-DC Required TX D+ as well as D- DC Impedance during all states 40 — — Ω — Lane-to-Lane output skew LTX-SKEW Static skew between any two Transmitter Lanes within a single Link — — 500 + 2 UI ps — AC coupling capacitor CTX All Transmitters shall be AC coupled. The AC coupling is required either within the media or within the transmitting component itself. An external capacitor of 100nF is recommended. 75 — 200 nF — Table 34. Differential Transmitter (TX) Output Specifications (continued) Parameter Symbol Comments Min Typical Max Units Notes |
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