IDT77V1254L25PGI IDT, Integrated Device Technology Inc, IDT77V1254L25PGI Datasheet - Page 46

• Manufacturer Part Number: IDT77V1254L25PGI
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT77V1254L25PGI

• Data Rate: 25.6/51.2Mbps
• Number Of Channels: 4
• Type Of Atm Phy Interface: DPI/UTOPIA
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Pin Count: 144
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

AC Test Conditions
except that transmit and receive are switched between the two. A Network device can be connected directly to a User device with a straight-through
cable. User-to-User or Network-to-Network connections require a cable with 1-to-7 and 2-to-8 crossovers.
IDT77V1254L25
A note about Figures 47 and 48: The ATM Forum and ITU-T standards for 25 Mbps ATM define "Network" and "User" interfaces. They are identical
Note: 1.No power or ground plane inside this area.
Connector
RJ45
RJ45
RJ45
RJ45
2.Analog power plane inside this area.
3.Digital power plane inside this area.
4.A single ground plane should extend over the area covered by the analog and digital power planes, without breaks.
5.All analog signal traces should avoid 90° corners.
Note 1
Rx
Tx
1
2
7
8
8
9 10 11 12 13 14 15 16
7
6
Magnetics
Magnetics
Magnetics
Magnetics
AGND
5
4
AGND
* Includes jig and scope capacitances.
3
Input Pulse Levels
Input Rise/Fall Times
Input Timing Reference Levels
Output Reference Levels
Output Load
2
Figure 47 PC Board Layout for ATM Network
1
D.U.T.
Filter
Filter
Figure 46 Output Load
Rx
Tx
Note 5
46 of 48
Note 2
Note 3
900
GND to 3.0V
3ns
1.5V
1.5V
See Figure 46
114
115 RX3+
111
112
141
142
3.3V
RX3-
1.2K
30pF*
TX3+ TX3-
106 105
77V1254L25
77V1254
IDT
December 2004
3505 drw 47
.