NB7VPQ16M PDF даташит
Спецификация NB7VPQ16M изготовлена «ON Semiconductor» и имеет функцию, называемую «1.8V/2.5V CML 12.5 Gbps Programmable Pre-Emphasis Copper/Cable Driver». |
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Детали детали
Номер произв | NB7VPQ16M |
Описание | 1.8V/2.5V CML 12.5 Gbps Programmable Pre-Emphasis Copper/Cable Driver |
Производители | ON Semiconductor |
логотип |
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NB7VPQ16M
1.8V/2.5V CML 12.5 Gbps
Programmable Pre-Emphasis
Copper/Cable Driver with
Selectable Equalizer Receiver
Multi−Level Inputs w/ Internal Termination
Description
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
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 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
(PEEQ).
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MARKING
DIAGRAM*
16
1
1
QFN−16
MN SUFFIX
CASE 485G
A
L
Y
W
G
NB7V
PQ16M
ALYWG
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free 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 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
1
Publication Order Number:
NB7VPQ16M/D
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Multi−Level Inputs
LVPECL, LVDS, CML
(2) IN
50W
(1) VT
(3) IN 50W
NB7VPQ16M
VCCD
VCC
GND
(15) SDIN
(14) SCLKIN
(13) SLOAD
5−Bit Shift Register
EQEN D0 D1 D2 D3
D/A Latch
EQEN
(EQualizer ENable)
4−Bit
DAC
0
2:1
MUX
EQ 1
Pre−Emphasis
Control
Figure 2. Detailed Block Diagram of NB7VPQ16M
SDOUT (6)
SCLKOUT (7)
Q (11)
Q (10)
CML Output
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Q Low
Q High
Bit n −1
Q
0V
Q High
Q Low
Bit n
Q High
Q Low
Bit n+1
Q Low
Q High
Bit n+2
PE = 0dB
PE = −12dB
20%
80%
VOD0dB
VODPE
Q
tPE
X130ps
PE = 20log(VODPE/VOD0dB)
VOD0dB − Differential Output Voltage without Pre−Emphasis
VODPE − Differential Output Voltage with Pre−Emphasis
Figure 3. Illustration of Output Waveform Definition
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NB7VPQ16M
Table 1. TYPICAL PRE−EMPHASIS CONTROL TABLE, EQ = 0, 255C, VCC = 1.8 V
4−bit PE
Decimal
MSB
D3
D2
LSB
D1 D0
PE Output Compensation in dB
Approximate @ 1 GHz
00
0 00 0
0 dB (Default)
01
0 00 1
−1.0 dB
02
0 01 0
−1.5 dB
03
0 01 1
−2.0 dB
04
0 10 0
−2.5 dB
05
0 10 1
−3.0 dB
06
0 11 0
−3.5 dB
07
0 11 1
−4.0 dB
08
1 00 0
−4.5 dB
09
1 00 1
−5.0 dB
10
1 01 0
−6.0 dB
11
1 01 1
−7.0 dB
12
1 10 0
−8.0 dB
13
1 10 1
−9.0 dB
14
1 11 0
−10.0 dB
15
1 11 1
−12.0 dB
VODPE Typ
(mV)
435
390
365
345
325
310
290
275
260
245
220
195
175
155
135
110
Table 2. EQUALIZER ENABLE FUNCTION
EQEN
0
1
Function
IN/IN Inputs By−pass the Equalizer section
Inputs flow through the Equalizer
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Номер в каталоге | Описание | Производители |
NB7VPQ16M | 1.8V/2.5V CML 12.5 Gbps Programmable Pre-Emphasis Copper/Cable Driver | ON Semiconductor |
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