Device
Operating
Temperature Range
Package
ORDERING INFORMATION
MC34055DW
TA = 0
°
to +70
°
C
SO–24L
SEMICONDUCTOR
TECHNICAL DATA
10BASE–T TRANSCEIVER
Order this document by MC34055/D
PIN CONNECTIONS
Clk Out
TX Data A
TX Data B
TX EN H
Ana. Gnd
Clk+
SQE EN L
TX–
Pwr VCC
FULLD L
RX Data A
RX Data B
RX+
RX EN H
RX–
Dig. Gnd
Pwr Gnd
TX+
Clk–
Loop L
CTL H
LNKFL H
JABB H
VCC(Dig/Ana)
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
24
1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
MOTOROLA ANALOG IC DEVICE DATA
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
VCC
VID
– 0.5 to 7.0
Vdc
Differential Voltage at RX+/RX–
– 5.25 to 5.25
Vdc
Voltage Applied to Logic and Mode/Test
Select Inputs
– 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
TJ
0 to 70
°
C
Junction Temperature
– 65 to 150
°
C
NOTE:
Devices should not be operated at these limits. The “Recommended Operating
Conditions” table provides for actual device operation.
Motorola, Inc. 1996
Rev 1