DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 161

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

Note 1: All resistor values are ±1%.
Note 2: X1 and X2 are very low DCR transformers.
Note 3: C1 = 1µF ceramic.
Note 4: S1 and S2 are 6V transient suppressers.
Note 5: D1–D8 are Schottky diodes.
Note 6: The optional fuses, F1–F4, prevent AC power line crosses from compromising the transformers.
Note 7: The 68mF is used to keep the local power-plane potential within tolerance during a surge.
Figure 22-4. Protected Interface Using Internal Receive Termination
TRANSMIT
LINE
RECEIVE
LINE
F3
F4
F1
F2
2:1
1:1
X2
X1
60
S2
S1
C1
0.1µF
0.1µF
0.1µF
60
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D7
D3
D5
D1 D2
VDD
VDD
D6
D8
D4
TTIP
TRING
RTIP
RRING
DS21Q55
DVDD
DVSS
TVDD
TVSS
RVDD
RVSS
0.1µF
0.1µF
0.1µF
0.01µF
10µF
10µF
+
+
VDD
68µF
+