78Q2133-DB TERIDIAN, 78Q2133-DB Datasheet - Page 3

• Manufacturer Part Number: 78Q2133-DB
• Description: Development Tools & Eval/Demo Boards
• Manufacturer: TERIDIAN

Specifications of 78Q2133-DB

• Silicon Manufacturer: Teridian
• Application Sub Type: MII
• Kit Application Type: Interface
• Silicon Core Number: 78Q2133
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10/100Mbps Transformer Selection
The line interface for the MicroPHY requires a pair of 1:1 isolation transformers. Integrated common-mode
chokes are recommended for satisfying FCC radiated EMI requirements. Additional filtering is not required with
the MicroPHY due to internal waveform shaping circuitry. The line transformer characteristics are outlined below:
Note 1: The receive line transformer’s Open-Circuit Inductance can be as low as 100 µH for the MicroPHY. The
MicroPHY incorporates baseline wander correction circuitry, which allows the receiver to track the incoming data
signal when there is excessive transformer droop.
For Commercial Temperature (0°C ~ 70°C)
Teridian Semiconductor has performed line testing with the following transformers and found their performance
acceptable with the MicroPHY:
The following transformers are low profile packages (0.100 in/2.5 mm or less).
The following devices integrate the transformers with the RJ45 connector.
The following devices integrate the transformers, RJ45 connector, LEDs and termination resistors.
The above evaluations were performed using Netcom’s Smart-Bits Fast Ethernet Analyzer.
Semiconductor MicroPHY MII Adapter and Lancast Fast Ethernet Adapter were attached to the Netcom’s Ports A
& B respectively. Twisted pair Category 5 General Cable P/N 459360 was used to connect the two transceivers.
100 Mbps performance was measured using cable lengths of both 12 inches and 115 meters.
performance was evaluated using 100 meters of Category 3 cable.
The Netcom was configured to use the Baseline Wander Packet file. Packet length was 1500 bytes.
All transformers listed above met or exceeded IEEE’s 802.3 Bit Error Rate requirements of 10
© 2006 Teridian Semiconductor Corporation, Proprietary and Confidential
Manufacturer
TDK
Bel-Fuse
Halo
Pulse
Valor
YCL
TDK
Halo
PCA
TDK
Delta
Pulse
Inter-Winding Capacitance
Open-Circuit Inductance
Leakage Inductance
D.C. Resistance
Insertion Loss
Turns Ratio
HIPOT
Name
Part Number
TLA-6T103
S558-5999-46
TG22-3506ND
PE-68515
ST6118
20PMT04
TLA-6T118
TG110-S050
EPF8023G
TLA-6T704
RJS-1A08T089A
J0011D21B/E
0.9 ohm (max)
0.40 µH (max)
350 µH (min)
25 pF (max)
See Note 1.
1 CT : 1 CT
1.1 dB (typ)
1500 Vrms
Value
- 3 -
@ 10 mV, 10 kHz
@ 1 MHz (min)
0 - 100 MHz
Condition
DEMO BOARD MANUAL
78Q21x3-DB MicroPHY
MII Evaluation Board
-8
.
The Teridian
10 Mbps
Rev_2.2
TM
fd