NE83Q93D View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
NE83Q93D Datasheet PDF : 11 Pages
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Philips Semiconductors
Enhanced coaxial Ethernet transceiver
Product specification
NE83Q93
PIN DESCRIPTIONS
PIN NO. SYMBOL
D, N PKG
DESCRIPTION
1
CD+ Collision Outputs. Balanced differential line driver outputs which send a 10MHz signal to the DTE in the event of
2
CD– a collision, jabber interrupt or heartbeat test. External pull-down resistors are optional.
3
RX+ Receiver Outputs. Balanced differential line driver outputs which send the received signal to the DTE. External
6
RX– pull-down resistors are optional.
7
TX+
Transmitter Inputs. Balanced differential line receiver inputs which accept the transmission signal from the DTE
8
TX–
and apply it to the coaxial cable at TXO, if it meets Tx squelch threshold.
Transmit Enable. A CMOS compatible input requiring an input voltage range of VEE to VEE + 5V. The transmitter
9
TEN and loopback functions are disabled when TEN is LOW and enabled when TEN is HIGH or left floating. TEN is
normally driven through an opto-coupler.
10
XLED Transmit Indicator. Indicates a packet is being transmitted onto the coaxial cable.
11
JLED Jabber Indicator. Indicates that the jabber timer has timed out and the coaxial driver is disabled.
12
LCOM LED Common. The anodes of all status indicator LEDs are connected to this pin. It’s voltage is VEE + 5V.
13
CLED Collision Indicator. Indicates that a collision has been detected.
14
LINK Link Indicator. Indicates that a connection is present to the coaxial cable network.
15
RLED Receive Indicator. Indicates that a packet is being received from the coaxial cable.
16
CRS
Carrier Sense. A real time output that indicates the presence of a carrier on the coaxial cable. CRS is normally
used to drive an opto-coupler.
17
HBE
Heartbeat Enable. The heartbeat function is disabled when this pin is connected to VEE and enabled when
connected to GND or left floating.
11
12
RR+
RR–
External Resistor. A 1kΩ (1%) resistor connected between these pins establishes the signaling current at TXO.
22
RXI
Receiver Input. This pin is connected directly to the coaxial cable. Received signals are equalized, amplified,
and sent to the DTE through the RX+ pins, if it meets Rx squelch threshold.
23
TXO
Transmitter Output. This pin is connected directly (Thin Ethernet) or through an external isolating diode
(Ethernet) to the coaxial cable.
24
CDS
Collision Detect Sense. Ground sense connection for the collision detection circuitry. This pin should be
connected directly to the coaxial cable shield for standard Ethernet operation.
18
GND Positive Supply Pin.
4
5
21
VEE
Negative supply pins.
NOTE:
1. The IEEE 802.3 name for CD is CI; for RX is DI; for TX is DO.
1995 May 1
2
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