MAX9242EUM+T Maxim Integrated, MAX9242EUM+T Datasheet - Page 15

• Manufacturer Part Number: MAX9242EUM+T
• Description: Serializers & Deserializers - Serdes 21-Bit DC-Balanced LVDS Deserializer
• Manufacturer: Maxim Integrated
• Type: Deserializerr

Specifications of MAX9242EUM+T

• Data Rate: 840 Mbit/s
• Input Type: LVDS
• Output Type: LVCMOS/LVTTL
• Number Of Inputs: 3
• Number Of Outputs: 21
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: TSSOP-48
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

Figure 14. Output Waveforms when Spread is Added
Figure 15. Output Waveforms when Spread is Removed
spread-spectrum PLL locks immediately after (see
Figure 16). If the spread-spectrum PLL loses lock, it
locks again with only one PLL lock delay (see Figure 17).
Bit errors experienced with DC-coupling (Figure 18)
can be eliminated by increasing the receiver common-
mode voltage range through AC-coupling. AC-coupling
Figure 13. Output Waveforms when Spread Amount is Changed
RxCLKOUT
RxCLKOUT
RxCLKOUT
RxOUT_
RxOUT_
RxOUT_
SSG
SSG
SSG
______________________________________________________________________________________
±4% OR ±2% SPREAD
±4% OR ±2% SPREAD
21-Bit Deserializers with Programmable
NO SPREAD
AC-Coupling Benefits
Spread Spectrum and DC Balance
DATA SWITCHING BUT NOT VALID
RPLLS2 (32,800 x RCIP)
RPLLS2 (32,800 x RCIP)
RPLLS2 (32,800 x RCIP)
±2% OR ±4% SPREAD
±2% OR ±4% SPREAD
NO SPREAD
LOW
LOW
increases the common-mode voltage range of an LVDS
receiver to nearly the voltage rating of the capacitor. The
typical LVDS driver output is 350mV centered on a 1.25V
offset voltage, making single-ended output voltages of
1.425V and 1.075V. An LVDS receiver accepts signals
from 0V to 2.4V, allowing approximately ±1V common-
mode difference between the driver and receiver on a
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