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NB7VPQ16M Datasheet, PDF (1/16 Pages) ON Semiconductor – 1.8V/2.5V CML 12.5 Gbps Programmable Pre-Emphasis Copper/Cable Driver with Selectable Equalizer Receiver | |||
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NB7VPQ16M
1.8V/2.5V CML 12.5 Gbps
Programmable Pre-Emphasis
Copper/Cable Driver with
Selectable Equalizer Receiver
MultiâLevel Inputs w/ Internal Termination
Description
The NB7VPQ16M is a high performance single channel
programmable PreâEmphasis 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 InterâSymbol Interference
(ISI) caused by losses in copper interconnect or long cables.
The PreâEmphasis 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
PreâEmphasis settings to select the optimal output compensation
level.
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 deâemphasis (see Table 1).
For cascaded applications, the shifted SDIN and SCLKIN signals
are presented at the SDOUT and SCLKOUT pins.
The 5thâbit (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
50 W termination resistors, in a 100 W centerâtapped configuration,
via the VT pin and will accept LVPECL, CML or LVDS logic levels.
This feature provides transmission line termination onâchip, at the
receiver end, eliminating external components.
The NB7VPQ16M is a member of the GigaComm⢠Family of high
performance Data/Clock products with PreâEmphasis/Equalization
(PEEQ).
http://onsemi.com
MARKING
DIAGRAM*
16
1
1
QFNâ16
MN SUFFIX
CASE 485G
A
L
Y
W
G
NB7V
PQ16M
ALYWG
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbâFree Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
IN
VT
IN
SDIN
SCLKIN
SLOAD
EQ
SDI
DAC
PE
SDOUT
SCLKOUT
Q
Q
Figure 1. Simplified Logic Diagram
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
Features
⢠Maximum Input Data Rate > 12.5 Gbps
⢠Maximum Input Clock Frequency > 8 GHz
⢠Drives Up To 18âinches of FR4
⢠(16) Programmable Output Deâemphasis Levels; 0 dB
through 12 dB
⢠200 ps Typical Propagation Delay
⢠Differential CML Outputs, 400 mV PeakâtoâPeak,
Typical (PE = 0 dB)
⢠Operating Range: VCC = 1.71 V to 2.625 V, GND = 0 V
⢠Internal Output Termination Resistors, 50 W
⢠QFNâ16 Package, 3 mm x 3 mm
⢠â40°C to +85°C Ambient Operating Temperature
⢠These are PbâFree Devices
© Semiconductor Components Industries, LLC, 2009
1
July, 2009 â Rev. 0
Publication Order Number:
NB7VPQ16M/D
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