nb7vpq16m ON Semiconductor, nb7vpq16m Datasheet - Page 2

• Manufacturer Part Number: nb7vpq16m
• Description: 1.8v / 2.5v Cml 12.5 Gbps Programmable Pre-emphasis Copper/cable Driver With Selectable Equalizer Receiver
• Manufacturer: ON Semiconductor

Table 1. Typical Pre-Emphasis Control Table, EQ=0, 25°C, VCC = 1.8V
Multi-Level Inputs
LVPECL, LVDS,CML
Table 2. Equalizer Enable Function
Decimal
EQEN
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
0
1
IN / INb Inputs By-pass the Equalizer section
Inputs flow through the Equalizer
(3) INb
MSB
D3 D2 D1 D0
(2) IN
(1) VT
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
4-bit PE
50-Ω
50-Ω
LSB
Compensation in dB
Approximate @ 1GHz
Function
PE Output
-10.0 dB
-12.0 dB
0 dB (
-1.0 dB
-1.5 dB
-2.0 dB
-2.5 dB
-3.0 dB
-3.5 dB
-4.0 dB
-4.5 dB
-5.0 dB
-6.0 dB
-7.0 dB
-8.0 dB
-9.0 dB
Figure 2. Detailed Block Diagram of NB7VPQ16M
Default
EQ
)
http://onsemi.com
VODPE
NB7VPQ16M
typical
(14)
(mV)
(13)
435
325
310
290
275
260
245
220
195
175
155
135
110
390
365
345
(15)
0
1
Mux
2:1
SCLKIN
SLOAD
2
SDIN
EQEN
Limiting Amp
(Equalizer Enable)
Q Low
Qb High
0V
Bit n -1
Qb
Figure 3. Illustration of Output Waveform Definition
Q
V
V
OD0dB
ODPE
EQEN D0 D1 D2 D3
– Differential Output Voltage with Pre-Emphasis
– Differential Output Voltage without Pre-Emphasis
5-Bit Shift Register
Pre-Emphasis
D/A Latch
~160ps
Q High
4-Bit DAC
Qb Low
t
Control
PE
V
Bit n
20%
80%
OD0dB
PE = 20log(
PE = 0dB
Bit n +1
V
Q High
Qb Low
ODPE
SDOUT
SCLKOUT
CML Output
V
PE = -12dB
ODPE/
Q
Qb
(11)
(10)
V
(6)
OD0dB
(7)
Qb High
Q Low
Bit n +2
)