參數(shù)資料
型號(hào)： MAX9176
廠商： Maxim Integrated Products, Inc.
英文描述： 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers
中文描述： 670MHz、LVDS至LVDS和任何邏輯至LVDS 2:1多路復(fù)用器
文件頁(yè)數(shù)： 9/14頁(yè)
文件大?。?/td> 245K
代理商： MAX9176
M
670MHz LVDS-to-LVDS and
Anything-to-LVDS 2:1 Multiplexers
_______________________________________________________________________________________
9
Detailed Description
The MAX9176/MAX9177 are 670MHz, low-jitter, low-
skew 2:1 multiplexers ideal for protection switching,
loopback, and clock distribution. The devices feature
ultra-low 68ps(
P-P
) deterministic jitter that ensures reli-
able operation in high-speed links that are highly sensi-
tive to timing error.
The MAX9176 has fail-safe LVDS inputs and an LVDS
output. The MAX9177 has anything differential inputs
(CML/LVDS/LVPECL) and an LVDS output. The output
can be put into high impedance using the power-down
input. The MAX9176 features fail-safe circuits that drive
the output high when a selected input is open, undriv-
en and shorted, or undriven and terminated. The
MAX9177 has bias circuits that force the output high
when a selected input is open. The mux select and
power-down inputs are compatible with standard
LVTTL/LVCMOS logic.
The select and power-down inputs tolerate undershoot
of -1V and overshoot of V
CC
+ 1V. The MAX9176/
MAX9177 are available in 10-pin μMAX and 10-lead
thin QFN packages, and operate from a single 3.3V
supply over the -40
°
C to +85
°
C temperature range.
Current-Mode LVDS Output
The LVDS output uses a current-steering configuration.
This approach results in less ground bounce and less
output ringing, enhancing noise margin and system
speed performance.
A differential output voltage is produced by steering
current through the parallel combination of the integrat-
ed differential output resistor and transmission line
impedance/termination resistor. When driving a 100
load, a differential voltage of 250mV to 475mV is pro-
duced. For loads greater than 100
, the output voltage
is larger, and for loads less than 100
, the output volt-
age is smaller. See the Differential Output Voltage vs.
Load Resistance curve in
Typical Operating
Characteristics
for more information. The output is
short-circuit current limited for single-ended and differ-
ential shorts.
MAX9176 Input Fail-Safe
The fail-safe feature of the MAX9176 sets the output
high when the differential input is:
Open
Undriven and shorted
Undriven and terminated
Without a fail-safe circuit, when the selected input is
undriven, noise at the input may switch the output and
it may appear to the system that data is being sent.
Open or undriven terminated input conditions can
occur when a cable is disconnected or cut, or when
the driver output is in high impedance. A shorted input
can occur because of a cable failure.
When the selected input is driven with a differential sig-
nal of
V
ID
= 50mV to 1.2V within a voltage range of 0
to 2.4V, the fail-safe circuit is not activated. If the select-
ed input is open, undriven and shorted, or undriven and
terminated, an internal resistor in the fail-safe circuit
pulls both inputs above V
CC
- 0.3V, activating the fail-
safe circuit and forcing the output high (Figure 1).
Overshoot and Undershoot Voltage
Protection
The MAX9176/MAX9177 are designed to protect the
select and power-down inputs (SEL and
PD
) against
latchup due to transient overshoot and undershoot volt-
age. If the input voltage goes above V
CC
or below
GND by up to 1V, an internal circuit limits input current
to 1.5mA.
INPUTS
(IN_+) - (IN_-)
≥
+50mV
≤
-50mV
-50mV < V
ID
< +50mV
MAX9177
OUTPUT
(OUT+) - (OUT-)
H
L
Indeterminate
Open
MAX9176
Open, undriven
short, or undriven
parallel termination
H
Table 1. Function Table
SEL
H
PD
H
H
OUT+, OUT-
IN1+, IN1-
L or open
IN0+, IN0-
X
L or open
High impedance to ground
and 123
(typ) differential
output resistance
Table 2. Input Select and Power-Down
Function Table
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9176ETB 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers
MAX9176EUB 制造商:Maxim Integrated Products 功能描述:670MHZ LVDS-TO-LVDS AND ANYTHING"-TO-LVDS2:" - Rail/Tube
MAX9176EUB+ 功能描述:LVDS 接口集成電路 670MHz LVDS->LVDS & X->LVDS 2:1 MUX RoHS:否 制造商:Texas Instruments 激勵(lì)器數(shù)量:4 接收機(jī)數(shù)量:4 數(shù)據(jù)速率:155.5 Mbps 工作電源電壓:5 V 最大功率耗散:1025 mW 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-16 Narrow 封裝:Reel
MAX9176EUB+T 功能描述:LVDS 接口集成電路 670MHz LVDS->LVDS & X->LVDS 2:1 MUX RoHS:否 制造商:Texas Instruments 激勵(lì)器數(shù)量:4 接收機(jī)數(shù)量:4 數(shù)據(jù)速率:155.5 Mbps 工作電源電壓:5 V 最大功率耗散:1025 mW 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-16 Narrow 封裝:Reel
MAX9177 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers
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