DS32ELX0421SQX/NOPB National Semiconductor, DS32ELX0421SQX/NOPB Datasheet - Page 4

• Manufacturer Part Number: DS32ELX0421SQX/NOPB
• Description: IC SERIALIZER 312.5GBPS 48LLP
• Manufacturer: National Semiconductor

Specifications of DS32ELX0421SQX/NOPB

• Function: Serializer
• Data Rate: 3.125Gbps
• Input Type: LVDS
• Output Type: CML
• Number Of Inputs: 5
• Number Of Outputs: 2
• Voltage - Supply: 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DS32ELX0421SQX

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Pin Descriptions
Pin Name
Power, Ground and Analog Reference
VDD33
VDD25
VDDPLL
VOD_CTRL
LF_CP
LF_REF
Exposed
Pad
CML I/O
TxOUT0+
TxOUT0-
TxOUT1+
TxOUT1-
LVDS Parallel Data Bus
TxCLKIN+
TxCLKIN-
TxIN[4:0]+/-
LVCMOS Control Pins
DC_B
RS
DE_EMPH0
DE_EMPH1
TXOUT1_E
N
RESET
LOCK
SMBus Interface
SCK
SDA
SMB_CS
Pin Number I/O, Type Description
7, 15, 18, 25,
39, 40,
41, 42,
43, 44,
45, 46,
47, 48
1, 36
35
28
14
27
26
49
16
17
19
20
37
38
10
12
30
31
33
32
34
5
6
9
I, VDD
I, VDD
I, VDD
Analog
Analog
Analog
GND
O, CML
O, CML
I, LVDS
I, LVDS
I,
LVCMOS
I,
LVCMOS
I,
LVCMOS
I,
LVCMOS
O,
LVCMOS
I/O,
SMBus
I/O,
SMBus
I, SMBus SMBus chip select. When held high, SMBus management control is enabled.
3.3V supply
2.5V supply
3.3V supply
V
pull-down resistor. The value of the resistor determines the VOD. See
AMPLITUDE
Loop filter connection for PLL
Loop filter ground reference
Exposed Pad must be connected to GND by 9 vias
Inverting and non-inverting high speed CML differential outputs of the serializer. These
outputs are internally terminated.
DS32ELX0421 ONLY. Redundancy output. Inverting and non-inverting high speed CML
differential outputs of the serializer. These outputs are internally terminated
Serializer input clock. TxCLKIN+/- are the inverting and non-inverting LVDS transmit
clock input pins.
Serializer input data. TxIN[4:0]+/- are the inverting and non-inverting LVDS serializer
input data pins.
DC-balance and Remote Sense pins. See Device Configuration section for device
behavior.
DE_EMPH0, DE_EMPH1 select the output de-emphasis level. These pins are internally
pull-down.
00: Off
01: Low
10: Medium
11: Maximum
DS32ELX0421 ONLY. When held high, redundant output TxOUT1+/- is enabled. This
pin must be tied high when using TxOUT1+/-.
When held low, reset the device.
0 = Device Reset
1 = Normal operation
Lock indication output. The input data on TxIN[0:4]+/- pins is ignored when LOCK pin is
high.
SMBus compatible clock.
SMBus compatible data line.
OD
control. The serializer output amplitude can be adjusted by connecting this pin to a
for more details.
4
CML LAUNCH