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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ML4665 Datenblatt(PDF) 3 Page - Micro Linear Corporation |
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ML4665 Datenblatt(HTML) 3 Page - Micro Linear Corporation |
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3 / 13 page  3 ML4665 PIN NAME FUNCTION 11 LMON Link Monitor “Low Light” LED status output. This pin is pulled low when the voltage on the VIN+, VIN– inputs exceed the minimum threshold and there are transitions on VIN+, VIN– indicating an idle signal or active data. If either the voltage on the VIN+, VIN– inputs fall below the minimum threshold or transitions cease on VIN+, VIN–, LMON will go high. Active low LED driver, open collector. 12 VCCTx +5 volt supply for fiber optic LED driver. 13 TxOUT Fiber optic LED driver output. 14 GND Ground Reference. 15 CTIMER A capacitor from this pin to VCC determines the Link Monitor response time. 16 VDC An external capacitor on this pin integrates an error signal which nulls the offset of the input amplifier. If the DC feedback loop is not being used, this pin should be connected to VREF. 17 AGND Analog Filtered Ground. 18 VIN– This input pin should be capacitively coupled to the input source or to filtered AVCC. (The input resistance is approximately 1.3k Ω.) 19 VIN+ This input pin should be capacitively coupled to the input source or to filtered AVCC. (The input resistance is approximately 1.3k Ω.) 20 AVCC Analog Filtered +5 volts. PIN DESCRIPTION PIN NAME FUNCTION 1 LBDIS Loopback disable. When this pin is tied to VCC, the AUI transmit pair data is not looped back to the AUI receive pair. The ML4665 will now operate in the full duplex mode. When tied to GND or left floating, the AUI transmit pair data is looped back to the AUI receive pair, except during collision. The ML4665 will now operate in the half duplex mode. 2 COL+ Gated 10MHz oscillation used to 3 COL– indicate a collision or jabber. Balanced differential line driver outputs that meet AUI specifications. 4 Rx+ Manchester encoded receive data 5 Rx– output to the local device. Balanced differential line driver outputs that meet AUI specifications. 6VCC +5 volt power input. 7 Tx+ Balanced differential line receiver 8 Tx– inputs that meet AUI specifications. These inputs may be transformer or capacitively coupled. The Tx input pins are internally DC biased for AC coupling. 9 RTSET Sets the current driven output of the transmitter. 10 RRSET A 1% 61.9k Ω resistor tied from this pin to VCC sets the biasing currents for internal nodes. |
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