MAX3690ECJ-T Maxim Integrated Products, MAX3690ECJ-T Datasheet - Page 6

• Manufacturer Part Number: MAX3690ECJ-T
• Description: Communication ICs - Various
• Manufacturer: Maxim Integrated Products
• Type: SDH/SONET 8:1 Serializerr

Specifications of MAX3690ECJ-T

• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Supply Type: Analog
• Package / Case: TQFP-32
• Data Rate: 622 Mbps
• Supply Current: 60 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 3 shows alternative PECL-output-termination
methods. Use Thevenin-equivalent termination when a
(V
coupling is necessary, be sure that the coupling
capacitor is placed following the 50Ω or Thevenin-
equivalent DC termination.
For best performance, use good high-frequency layout
techniques. Filter voltage supplies and keep ground
connections short. Use multiple vias where possible.
Also, use controlled-impedance transmission lines to
interface with the MAX3690 data outputs.
+3.3V, 622Mbps, SDH/SONET 8:1 Serializer
with Clock Synthesis and TTL Inputs
6
__________Applications Information
CC
_______________________________________________________________________________________
- 2V) termination voltage is not available. If AC
Alternative PECL-Output Termination
Layout Techniques
Figure 3. Alternative PECL-Output Termination
MAX3690
MAX3690
SD+
SD+
SD-
SD-
V
CC
Z
Z
Z
Z
+3.3V
0
0
0
0
= 50Ω
= 50Ω
= 50Ω
= 50Ω
- 2V
130Ω
50Ω
82Ω
130Ω
50Ω
82Ω
HIGH-
IMPEDENCE
INPUTS
PECL
INPUTS