1.8V/2.5V CML 12.5 Gbps
Copper/Cable Driver with
Selectable Equalizer Receiver
Multi−Level Inputs w/ Internal Termination
The NB7VPQ16M is a high performance single channel
programmable Pre−Emphasis CML Driver with a selectable Equalizer
Receiver that operates up to 14 Gbps typical with a 1.8 V or 2.5 V
power supply. When placed in series with a Data/Clock path, the
NB7VPQ16M inputs will compensate the degraded signal transmitted
across a FR4 PCB backplane or cable interconnect. Therefore, the
serial data rate is increased by reducing Inter−Symbol Interference
(ISI) caused by losses in copper interconnect or long cables.
The Pre−Emphasis buffer is controlled using a serial bus via the
Serial Data In (SDIN) and Serial Clock In (SCLKIN) control inputs
and contains circuitry which provides sixteen programmable
Pre−Emphasis settings to select the optimal output compensation
These selectable output levels will handle various backplane lengths
and cable lines. The first four SDIN bits (D3:D0) will digitally select
0 dB through 12 dB typical of de−emphasis (see Table 1).
For cascaded applications, the shifted SDIN and SCLKIN signals
are presented at the SDOUT and SCLKOUT pins.
The 5th−bit (LSB) of the serial data bits allows for enabling the
equalization function of the receiver.
The differential Data / Clock inputs incorporate a pair of internal
www.Dat5a0ShWeette4rUm.cionmation resistors, in a 100 W center−tapped configuration,
via the VT pin and will accept LVPECL, CML or LVDS logic levels.
This feature provides transmission line termination on−chip, at the
receiver end, eliminating external components.
The NB7VPQ16M is a member of the GigaComm™ Family of high
performance Data/Clock products with Pre−Emphasis/Equalization
= Assembly Location
= Wafer Lot
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
Figure 1. Simplified Logic Diagram
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
• Maximum Input Data Rate > 12.5 Gbps
• Maximum Input Clock Frequency > 8 GHz
• Drives Up To 18−inches of FR4
• (16) Programmable Output De−emphasis Levels; 0 dB
through 12 dB
• 200 ps Typical Propagation Delay
• Differential CML Outputs, 400 mV Peak−to−Peak,
Typical (PE = 0 dB)
• Operating Range: VCC = 1.71 V to 2.625 V, GND = 0 V
• Internal Output Termination Resistors, 50 W
• QFN−16 Package, 3 mm x 3 mm
• −40°C to +85°C Ambient Operating Temperature
• These are Pb−Free Devices
© Semiconductor Components Industries, LLC, 2009
July, 2009 − Rev. 0
Publication Order Number: