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PDF DS25BR110 Data sheet ( Hoja de datos )
| Número de pieza | DS25BR110 | |
| Descripción | 3.125 Gbps LVDS Buffer | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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April 2007
DS25BR110
3.125 Gbps LVDS Buffer with Receive Equalization
General Description
The DS25BR110 is a single channel 3.125 Gbps LVDS buffer
optimized for high-speed signal transmission over lossy FR-4
printed circuit board backplanes and balanced metallic ca-
bles. A fully differential signal path ensures exceptional signal
integrity and noise immunity.
The DS25BR110 features four levels of receive equalization
(EQ), making it ideal for use as a receiver device. Other LVDS
devices with similar IO characteristics include the following
products. The DS25BR120 features four levels of pre-em-
phasis for use as an optimized driver device, while the
DS25BR100 features both pre-emphasis and equalization for
use as an optimized repeater device. The DS25BR150 is a
buffer/repeater with the lowest power consumption and does
not feature transmit pre-emphasis nor receive equalization.
Wide input common mode range allows the receiver to accept
signals with LVDS, CML and LVPECL levels; the output levels
are LVDS. A very small package footprint requires minimal
space on the board while the flow-through pinout allows easy
board layout. The differential inputs and outputs are internally
terminated with a 100Ω resistor to lower device input and out-
put return losses, reduce component count, and further min-
imize board space.
Features
■ DC - 3.125 Gbps low jitter, high noise immunity, low power
operation
■ Four levels of receive equalization reduce ISI jitter
■ On-chip 100Ω input and output termination minimizes
insertion and return losses, reduces component count and
minimizes board space
■ 7 kV ESD on LVDS I/O pins protects adjoining
components
■ Small 3 mm x 3 mm 8-LLP space saving package
Applications
■ Clock and data buffering
■ Metallic cable equalization
■ FR-4 equalization
Typical Application
© 2007 National Semiconductor Corporation 300053
30005310
www.national.com
1 page  
AC Electrical Characteristics (Note 11)
Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 9, 10)
Symbol
Parameter
Conditions
Min Typ Max Units
LVDS OUTPUT AC SPECIFICATIONS (OUT+, OUT-)
tPHLD Differential Propagation Delay High to Low
tPLHD Differential Propagation Delay Low to High
tSKD1 Pulse Skew |tPLHD − tPHLD| (Note 12)
tSKD2 Part to Part Skew (Note 13)
tLHT Rise Time
tHLT Fall Time
JITTER PERFORMANCE WITH EQ = OFF
RL = 100Ω
RL = 100Ω
350 465
350 465
45 100
45 150
80 150
80 150
ps
ps
ps
ps
ps
ps
tRJ1A
tRJ2A
Random Jitter (RMS Value)
No Test Channels
(Note 14)
VID = 350 mV
VCM = 1.2V
Clock (RZ)
EQ0 = 0, EQ1 = 0
2.5 Gbps
3.125 Gbps
0.5 1
0.5 1
ps
ps
tDJ1A
tDJ2A
Deterministic Jitter (Peak to Peak)
No Test Channels
(Note 15)
VID = 350 mV
VCM = 1.2V
K28.5 (NRZ)
EQ0 = 0, EQ1 = 0
2.5 Gbps
3.125 Gbps
11 40 ps
11 47 ps
tTJ1A
tTJ2A
Total Jitter (Peak to Peak)
No Test Channels
(Note 16)
VID = 350 mV
VCM = 1.2V
PRBS-23 (NRZ)
EQ0 = 0, EQ1 = 0
2.5 Gbps
3.125 Gbps
0.05 0.16 UIP-P
0.08 0.20 UIP-P
5 www.national.com
5 Page 
Typical Performance
30005334
Maximum Data Rate as a Function of CAT5e
(Belden 1700A) Length
30005335
Maximum Data Rate as a Function of CAT5e
(Belden 1700A) Length
30005336
Maximum Data Rate as a Function of CAT7
(Siemon Tera) Length
30005337
Maximum Data Rate as a Function of CAT7
(Siemon Tera) Length
30005338
Maximum Data Rate as a Function of CAT5e
(Belden 1700A) Length
DS25BR120 Used as a Driver
DS25BR110 Used as a Receiver
11
30005339
Maximum Data Rate as a Function of CAT5e
(Belden 1700A) Length
DS25BR120 Used as a Driver
DS25BR110 Used as a Receiver
www.national.com
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet DS25BR110.PDF ] | |
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