DS92LV0411SQE/NOPB National Semiconductor, DS92LV0411SQE/NOPB Datasheet - Page 29

• Manufacturer Part Number: DS92LV0411SQE/NOPB
• Description: IC SER/DESER 5-50MHZ 24B 36-LLP
• Manufacturer: National Semiconductor

Specifications of DS92LV0411SQE/NOPB

• Serdes Function: Serializer
• Data Rate: 1.2Gbps
• Ic Output Type: CML
• No. Of Inputs: 4
• No. Of Outputs: 2
• Supply Voltage Range: 1.71V To 1.89V, 3V To 3.6V
• Driver Case Style: LLP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DS92LV0411SQE/NOPBTR

Optional Serial Bus Control
The DS92LV0411 and DS92LV0412 may be configured by
the use of a serial control bus that is I2C protocol compatible.
By default, the I2C reg_0x00'h is set to 00'h and all configu-
ration is set by control/strap pins. A write of 01'h to reg_0x00'h
will enable/allow configuration by registers; this will override
the control/strap pins. Multiple devices may share the serial
control bus since multiple addresses are supported. See
ure
The serial bus is comprised of three pins. The SCL is a Serial
Bus Clock Input. The SDA is the Serial Bus Data Input / Out-
put signal. Both SCL and SDA signals require an external pull
up resistor to V
resistor to 3.3V may be used. The resistor value may be ad-
justed for capacitive loading and data rate requirements. The
signals are either pulled High, or driven Low.
27.
FIGURE 27. Serial Control Bus Connection
DDIO
. For most applications a 4.7 kΩ pull up
FIGURE 26. BIST Waveforms
30125241
Fig-
29
The third pin is the ID[X] pin. This pin sets one of four possible
device addresses. Three different connections are possible.
The pin may be pulled to V
kΩ resistor. Or a 10 kΩ pull up resistor (to V
V
to set other three possible addresses may be used. See
10.
The Serial Bus protocol is controlled by START, START-Re-
peated, and STOP phases. A START occurs when SCL
transitions Low while SDA is High. A STOP occurs when SDA
transition High while SCL is also HIGH. See
DDIO
)) and a pull down resistor of the recommended value
FIGURE 28. START and STOP Conditions
DD
(1.8V, NOT V
Figure
DDIO
DD
www.national.com
)) with a 10
1.8V, NOT
30125264
28.
Table
30125251