DS26521L+ Maxim Integrated Products, DS26521L+ Datasheet - Page 68

• Manufacturer Part Number: DS26521L+
• Description: IC TXRX T1/E1/J1 64-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS26521L+

• Number Of Drivers/receivers: 1/1
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 220 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 8-17. Basic Balanced Network Connections
RING
RING
TIP
TIP
RX
TX
RX
TX
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
S3, S4, S5, S6
T1 and T2
T1 and T2
T3 and T4
F1 to F4
NAME
S1, S2
S7, S8
Changing S7 and S8 to P1800SC devices provides symmetrical voltage suppresion between tip, ring, and ground.
The layout from the transformers to the network interface is critical. Traces should be at least 25 mils wide and separated
from other circuit lines by at least 150 mils. The area under this portion of the circuit should not contain power planes.
Some T1 (never in E1) applications source or sink power from the network-side center taps of the Rx/Tx transformers.
The ground trace connected to the S2/S3 pair and the S4/S5 pair should be at least 50 mils wide to conduct the extra current
from a longitudinal power-cross event.
Alternative component recommendations and line interface circuits can be found by contacting
[e-mail]
F2
F3
F4
F1
S8
S7
1.25A Slow Blow Fuse
1.25A Slow Blow Fuse
25V (max) Transient Suppressor
180V (max) Transient Suppressor
40V (max) Transient Suppressor
Transformer 1:1CT and 1:136CT (5.0V, SMT)
Transformer 1:1CT and 1:2CT (3.3V, SMT)
Dual Common-Mode Choke (SMT)
S3
S4
S5
S6
DESCRIPTION
or in Application Note 324, which is available at www.maxim-ic.com/AN324.
T3
T4
1:1
T1
2:1
T2
68 of 258
60
560 pF
S1
S2
0.1 uF
P0080SA MC
P1800SC MC
P0300SC MC
SMP 1.25
PE-68678
PE-65857
F1250T
60
T1136
PART
RRING
TTIP
TRING
RTIP
Single Chip Transceiver
Line Interface Unit
DS26521 Single T1/E1/J1 Transceiver
Dallas
or
MANUFACTURER
Teccor Electronics
Teccor Electronics
Teccor Electronics
Teccor Electronics
Pulse Engineering
Pulse Engineering
Pulse Engineering
Bel Fuse
DVDD
RVDD
DVSS
TVDD
TVSS
RVSS
0.1 uF
0.1 uF
0.01 uF
NOTES
3.3 V
1, 4, 5
2, 3, 5
2, 3, 5
3.3 V
1, 5
1, 5
5
5
5
0.1 uF
68 uF