SCAN25100TYA/NOPB National Semiconductor, SCAN25100TYA/NOPB Datasheet - Page 17

• Manufacturer Part Number: SCAN25100TYA/NOPB
• Description: IC SERIAL/DESERIAL CPRI 100-TQFP
• Manufacturer: National Semiconductor
• Series: SCANr

Specifications of SCAN25100TYA/NOPB

• Function: Serializer/Deserializer
• Data Rate: 2.5Gbps
• Input Type: LVTTL/LVCMOS
• Output Type: LVTTL, LVCMOS
• Number Of Inputs: 10
• Number Of Outputs: 10
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: TQFP EP
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SCAN25100TYA

Receive Equalization
The receiver front-end provides 3 steps of equalization filter
to compensate for ISI deterministic jitter from lossy back-
Receive Output Bus
Receive output data ROUT[9:0] is clocked on both rising and
falling edges of RXCLK. By using both RXCLK edges, the
RXPWDNB
Rx Output
ROUT[0]
ROUT[1]
ROUT[2]
ROUT[3]
ROUT[4]
ROUT[5]
ROUT[6]
ROUT[7]
ROUT[8]
ROUT[9]
EQ[1]
0
0
1
1
0
1
1
1
Missing REFCLK & in 10B
EQ[0]
Not Locked
TABLE 11. Receiver Output Truth Table (10-bit Mode, TENBMODE = 1)
Rx PLL
Locked
0
1
0
1
mode
x
10-bit Mode (TENBMODE = 1)
TABLE 10. Receiver Parallel Output Bus Mapping
Equalization disabled.
Equalization (approximately 2 dB).
Equalization (approximately 4 dB).
Equalization (approximately 8 dB).
FIGURE 4. SCAN25100 Serial Input Connection
TABLE 9. Receiver Equalizer Control Settings
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
Coded Data Bit
running at DDR Rate
Based on REFCLK
Recovered Clock
RXCLK
High - Z
High - Z
17
planes and cables. Pulling both EQ[1:0] pins low enables
MDIO control of equalization.
clock speed is halved, which reduces EMI issues. The re-
ceiver output bus can be configured in either read or write
mode.
30.72 MHz based on
30.72 MHz based on
Descriptions
Undefined
SYSCLK
REFCLK
High - Z
RXCLK
8-bit Mode (TENBMODE = 0)
Line Code Error Flag
Data Bit 7 (H, msb)
Data Bit 0 (A, lsb)
Data Bit 6 (G)
Data Bit 1 (B)
Data Bit 2 (C)
Data Bit 3 (D)
Data Bit 4 (E)
Data Bit 5 (F)
D/K Flag (Z)
Deserialized 10-bit Word
1111111111
ROUT[9:0]
Undefined
High - Z
20183471
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