78Q8392L 查看數據表（PDF） - TDK Corporation

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78Q8392L

Low Power Ethernet Coaxial Transceiver

TDK Corporation 

DESCRIPTION

The 78Q8392L Ethernet Transceiver is a low power

BiCMOS coax line transmitter/receiver. The device

includes analog transmit and receive buffers, a 10

MHz on-board oscillator, timing logic for jabber and

heartbeat functions, output drivers and bandgap

reference, in addition to a current reference and

collision detector.

This transceiver provides the interface between the

single-ended coaxial cable signals and the

Manchester-encoded differential logic signals.

Primary functional blocks include the receiver,

transmitter, collision detection and jabber timer. This

IC may be used in either internal or external MAU

environments.

The 78Q8392L is available in 16-pin plastic and 28-

pin PLCC packages.

78Q8392L

Low Power Ethernet

Coaxial Transceiver

February 1998

FEATURES

• Very low power consumption

• Compliant with Ethernet II, IEEE 802.3

10Base5 and 10Base2

• Integrates all transceiver functions except

signal and power isolation

• Innovative design minimizes external

components count and power consumption

• Jabber timer function integrated on chip

• Externally selectable CED heartbeat allows

operation with IEEE 802.3 compatible

repeaters

• Squelch circuitry at all inputs rejects noise

• Power-on reset and test modes

• Advanced BiCMOS process

510 ±5%

x4

COLLISION

SIGNAL

TO DTE

DATA TO

DTE

DATA FROM

DTE

CONNECT DIAGRAM

1 CD+

2 CD–

3

RX+

6 RX–

7 TX+

78

8

TX-

VEE 4

VEE 5

VEE 13

CDS 16

TXO 15

RXI 14

GND 10

HBE 9

12

RR-

RR+ 11

–9V

COAX

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