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PDF MAX9155EXT-T Data sheet ( Hoja de datos )
| Número de pieza | MAX9155EXT-T | |
| Descripción | Low-Jitter / Low-Noise LVDS Repeater in an SC70 Package | |
| Fabricantes | Maxim Integrated | |
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19-2213; Rev 0; 10/01
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
General Description
The MAX9155 is a low-voltage differential signaling
(LVDS) repeater, which accepts a single LVDS input
and duplicates the signal at a single LVDS output. Its
low-jitter, low-noise performance makes it ideal for
buffering LVDS signals sent over long distances or
noisy environments, such as cables and backplanes.
The MAX9155’s tiny size makes it especially suitable for
minimizing stub lengths in multidrop backplane appli-
cations. The SC70 package (half the size of a SOT23)
allows the MAX9155 to be placed close to the connec-
tor, thereby minimizing stub lengths and reflections on
the bus. The point-to-point connection between the
MAX9155 output and the destination IC, such as an
FPGA or ASIC, allows the destination IC to be located
at greater distances from the bus connector.
Ultra-low, 23psp-p added deterministic jitter and
0.6psRMS added random jitter ensure reliable commu-
nication in high-speed links that are highly sensitive to
timing errors, especially those incorporating clock-and-
data recovery, PLLs, serializers, or deserializers. The
MAX9155’s switching performance guarantees a
200Mbps data rate, but minimizes radiated noise by
guaranteeing 0.5ns minimum output transition time.
The MAX9155 has fail-safe circuitry that sets the output
high for undriven open, short, or terminated inputs.
The MAX9155 operates from a single +3.3V supply and
consumes only 10mA over a -40°C to +85°C tempera-
ture range. Refer to the MAX9129 data sheet for a quad
bus LVDS driver, and to the MAX9156 data sheet for a
low-jitter, low-noise LVPECL-to-LVDS level translator in
an SC70 package.
Features
o Tiny SC70 Package
o Ultra-Low Jitter
23psp-p Added Deterministic Jitter
(223-1 PRBS)
0.6psRMS Added Random Jitter
o 0.5ns (min) Transition Time Minimizes Radiated
Noise
o 200Mbps Guaranteed Data Rate
o Fail-Safe Circuit Sets Output High for Undriven
Inputs (Open, Terminated, or Shorted)
o Low 10mA Supply Current
o Low 6mA Supply Current in Fail-Safe
o Conforms to ANSI/EIA/TIA-644 LVDS Standard
o High-Impedance Inputs and Outputs in
Power-Down Mode
PART
MAX9155EXT-T
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-
PACKAGE
6 SC70-6
TOP
MARK
ABC
Applications
Cellular Phone Base Stations
DSLAMs
Digital Cross-Connects
Add/Drop Muxes
Network Switches/Routers
Multidrop Buses
Cable Repeaters
Typical Operating Circuit appears at end of data sheet.
TOP VIEW
Pin Configuration
OUT- 1
MAX9155
6 OUT+
GND 2
5 VCC
IN- 3
SC70
4 IN+
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
Typical Operating Characteristics (continued)
(VCC = +3.3V, RL = 100Ω ±1%, CL = 10pF, |VID| = 0.2V, VCM = 1.2V, TA = +25°C, unless otherwise noted. Signal generator output:
frequency = 100MHz, 50% duty cycle, RO = 50Ω, tR = 1.5ns, and tF = 1.5ns (0% to 100%), unless otherwise noted.)
800
750
700
650
600
550
500
450
400
-40
TRANSITION TIME
VS. TEMPERATURE
tTLH, tTHL
-15 10 35 60
TEMPERATURE (°C)
85
DIFFERENTIAL OUTPUT VOLTAGE
VS. LOAD RESISTOR
600
500
400
300
200
100
0
25 50 75 100 125 150
LOAD RESISTOR (Ω)
Pin Description
PIN NAME
FUNCTION
1
OUT-
Inverting LVDS Output
2
GND
Ground
3 IN- Inverting LVDS Input
4 IN+ Noninverting LVDS Input
5
VCC
Power Supply. Bypass VCC to GND
with 0.01µF ceramic capacitor.
6
OUT+
Noninverting LVDS Output
Table 1. Function Table for LVDS Fail-Safe
Input (Figure 2)
INPUT, VID
> 50mV
OUTPUT, VOD
High
< -50mV
50mV > VID > -50mV
Undriven open, short, or terminated
Low
Indeterminate
High
Note: VID = (IN+ - IN-), VOD = (OUT+ - OUT-)
High = 450mV ≥ VOD ≥ 250mV
Low = -250mV ≥ VOD ≥ -450mV
Detailed Description
The LVDS interface standard is a signaling method
intended for point-to-point communication over a con-
trolled-impedance medium, as defined by the ANSI/
TIA/EIA-644 and IEEE 1596.3 standards. The LVDS
standard uses a lower voltage swing than other com-
mon communication standards, achieving higher data
rates with reduced power consumption while reducing
EMI emissions and system susceptibility to noise.
The MAX9155 is a 200Mbps LVDS repeater intended
for high-speed, point-to-point, low-power applications.
The MAX9155 accepts an LVDS input and reproduces
an LVDS signal at the output. This device is capable of
detecting differential signals as low as 50mV and as
high as 1.2V within a 0 to 2.4V input voltage range. The
LVDS standard specifies an input voltage range of 0 to
2.4V referenced to ground.
Fail-Safe
Fail-safe is a feature that puts the output in a known
logic state (differential high) under certain fault condi-
tions. The MAX9155 outputs are differential high when
the inputs are undriven and open, terminated, or shorted
(Table 1).
_______________________________________________________________________________________ 5
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