ML4642

Absolute maximum ratings are limits beyond which thelife of the integrated circuit may be impaired. All oltages unless otherwise specified are measured withrespect to ground.
Power Supply Voltage Range VCC . . . GND 0.3V to 6.0V
Input Current RRSET, JAB1/JABD, JAB2, CDLED,
RxLED/LPBK/SQE, TxLED1, TxLED2 . . . . . . . . . . 60mA
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature . . . . . . . . . . . . . . . . 65°C to 150°C
Lead Temperature (Soldering 10 seconds) . . . . . . . 260°C
Thermal Resistance (qJA)
SSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109°C/W
PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C/W
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . 5V ± 10%
LED on Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
RRSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.9ký ± 1%

The ML4642 AUI Multiplexer contains all the necessarydrivers/receivers and control logic to implement a 2 portMAU when used in conjuction with a transceiver chipwhich has a standard 802.3 AUI interface. In addition, theML4642 is capable of operating in stand-alone modewhere it interconnects two DTEs in the absence of anetwork MAU. Several ML4642s can be cascadedtogether to implement a 4 or 8 port MAU or stand-alonedevice.

Logic within the ML4642 detects collisions resulting frommultiple DTEs transmitting simultaneously. In addition,collision signals received from a transceiver attached atthe MAU port are propagated to both of the DTE ports.Jabbering DTEs of ML4642 are prevented from loading down thenetwork by internal jabber timers which disable babblingports.