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From : Alexey Kochnov 2:5020/400 Птн 28 Мар 97 11:52
To : All Суб 29 Мар 97 08:39
Subj : Re: Hу что, никто не знает ?
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> Hеужели никто не знает назначения ног у микpосхем UM9092A, 83c92 и им
> подобных схем (пpиемо-пеpедатчик BNC-шных Ethernet каpточек ) ?
> Понятно, что там есть-то всего навсего вход линии, выход линии, вход сигнала,
> выход сигнала и выход сигнала коллизии, в самой схеме должен быть эходав.
83Q92 (Philips)
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DIP16 PLCC20 PLCC28 SYMBOL DESCRIPTION
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1 2 2 CD+
2 3 3 CD-
Collision Outputs. Balanced differential line driver outputs
which send a 10MHz signal to the DTE in the event of a collision,
jabber interrupt or heartbeat test. External pull-down resistors
are optional.
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3 4 4 RX+
6 8 12 RX-
Receiver Outputs. Balanced differential line driver outputs
which send the received signal to the DTE. External pull-down resistors
are optional.
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7 9 13 TX+
8 10 14 TX-
Transmitter Inputs. Balanced differential line receiver inputs
which accept the transmission signal from the DTE and apply it
to the coaxial cable at TXO, if it meets Tx squelch threshold.
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9 12 15 HBE
Heartbeat Enable. The heartbeat function is disabled when this
pin is connected to Vee and enabled when connected to GND
or left floating.
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11 14 18 RR+
12 15 19 RR-
External Resistor. A 1kOm (1%) resistor connected between these pins
establishes the signaling current at TXO.
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14 18 26 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.
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15 19 28 TXO
Transmitter Output. This pin is connected directly (Thin Ethernet)
or through an external isolating diode (Ethernet) to the coaxial cable.
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16 20 1 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.
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10 11 16 GND
13 17
Positive Supply Pin.
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4,5 5...7 5...11 Vee
13 16,17 20...25
Negative supply pins.
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- 1 - N/C Not used.
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NOTE: The IEEE 802.3 name for CD is CI; for RX is DI; for TX is DO.
HTH, Alexey
* Origin: Demos online service (2:5020/400@fidonet)
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