MC34055 Datasheet, PDF (1/16 Pages) Motorola, Inc – IEEE 802.3 10BASE-T TRANSCEIVER

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IEEE 802.3 10BASE-T
Transceiver
The Motorola 10BASE–T transceiver, designed to comply with the ISO
8802–3 [IEEE 802.3] 10BASE–T specification, will support a Medium
Dependent Interface (MDI) in an embedded Media Attachment Unit (MAU)*.
The interface supporting the Data Terminal Equipment (DTE) is TTL, CMOS,
and raised ECL compatible, and the interface to the Twisted Pair (TP) media
is supported through standard 10BASE–T filters and transformers.
Differential data intended for the TP media is provided a 50 ns pre–emphasis
and data at the TP receiver is screened by Smart Squelch circuitry for
specific threshold, pulse width, and sequence requirements.
Other features of the MC34055 include: Collision and Jabber detection
status outputs, select mode pins for forcing Loop Back and Full–Duplex
operation, a Signal Quality Error pin for testing the collision detect circuitry
without affecting the TP output, and a LED driver for Link Integrity status. An
on–chip oscillator, capable of receiving a clock input or operating under
crystal control, is also provided for internal timing and driving a buffered
clock output.
The MC34055 is manufactured on a BiCMOS process and is packaged in
a 24 pin SOIC.
• BiCMOS Technology for Low Power Operation
• Standard 5.0 V, ± 5% Voltage Supply
• Smart Squelch Enforcement of Threshold, Pulse Width, and Sequence
Requirements
• Driver Pre–Emphasis for Output Data
• TTL, CMOS and Raised ECL Compatible
• Interfaces to TP Media with Standard 10BASE–T Filters and
Transformers
• LED Capable Status Outputs for Collision, Jabber Detection, and Link
Integrity
• Directly Driven or Crystal Controlled Clock Oscillator
• Selectable Full–Duplex Operation
• Signal Quality Error Test Pin
• Selectable Loop Back
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
Power Supply Voltage
Differential Voltage at RX+/RX–
Voltage Applied to Logic and Mode/Test
Select Inputs
VCC
VID
– 0.5 to 7.0 Vdc
– 5.25 to 5.25 Vdc
– 0.5 to 5.5 Vdc
Voltage Applied to Logic Outputs and
Output Status Pins
– 0.5 to 7.0 Vdc
Ambient Operating Temperature Range
TA
0 to 70
°C
Junction Temperature
TJ
– 65 to 150
°C
NOTE: Devices should not be operated at these limits. The “Recommended Operating
Conditions” table provides for actual device operation.
MC34055
10BASE–T TRANSCEIVER
SEMICONDUCTOR
TECHNICAL DATA
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
PIN CONNECTIONS
Clk Out 1
TX Data A 2
TX Data B 3
TX EN H 4
Dig. Gnd 5
VCC(Dig/Ana) 6
Ana. Gnd 7
RX Data A 8
RX Data B 9
RX EN H 10
Loop L 11
LNKFL H 12
24 Clk+
23 Clk–
22 SQE EN L
21 TX+
20 TX–
19 Pwr Gnd
18 Pwr VCC
17 FULLD L
16 RX+
15 RX–
14 CTL H
13 JABB H
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34055DW TA = 0° to +70°C
SO–24L
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1