78P2351-IGT/F Maxim Integrated Products, 78P2351-IGT/F Datasheet - Page 6

• Manufacturer Part Number: 78P2351-IGT/F
• Description: LINE INTERFACE UNIT 100-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 78P2351-IGT/F

• Number Of Channels Per Chip: 1
• Propagation Delay Time: 10 ns
• Supply Voltage (max): 3.45 V
• Supply Voltage (min): 3.15 V
• Maximum Operating Temperature: + 85 C
• Package / Case: LQFP-100
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Design Guidelines for TERIDIAN 78P235x LIUs
TRANSFORMER SELECTION
The 78P235x LIUs use 1:1CT (center-tapped) wide band transformers for both transmit and receive ports. These
wideband transformers must exhibit the following characteristics:
To provide system designers with greater flexibility, Teridian has evaluated and approved multiple vendors in
compatible SMT footprints. The following table lists the recommended single and dual transformers from different
vendors.
NOTES:
Single core transformers
Dual core transformers
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 75Ω impedance (primary and secondary)
 Max RF power: ~250mA
 Max DC current: ~30mA
 Avg. Insertion loss: 1dB max
 Return loss: Min 16dB (7 –250 MHz)
 Frequency Response:
1. To request test data on any of the listed transformers or to get an updated list of qualified vendors, please
2. Pinout naming conventions can vary from vendor to vendor, but all winding diagrams should match those
send an email to:
found in Figure 9.
The bandwidth or frequency response of available transformers can range from
400MHz to 800MHz.
transformers can help eliminate the overshoots that can cause pulse mask failures. Too
narrow of a bandwidth will result in a rounded transmit pulse shape and receiver
sensitivity to binary CMI zeroes at max cable loss.
[e-mail]
Manufacturer
Mini Circuit
Halo
Tamura
Midcom
Datatronic
Manufacturer
Halo
TAMURA
Midcom
 2008 Teridian Semiconductor Corp.
For some system environments, more bandwidth-limiting
Part Number
ADT1-1WT-1
TG04-TDK2NS
TTC-298
7400-30R-LF1
SM78809
Part Number
TG04-TDK1N1
TTC-300
000-7419-30R-LF1
Rev 2.1