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參數(shù)資料
| 型號： | MAX9153EUI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC REPEATER 10-PORT LVDS 28TSSOP |
| 標準包裝： | 2,500 |
| 系列： | * |
MAX9153/MAX9154
Low-Jitter, 800Mbps, 10-Port LVDS
Repeaters with 100
Ω Drive
_______________________________________________________________________________________
7
impedance (to ground) when PWRDN = low or the
device is not powered. The outputs have a typical dif-
ferential resistance of 238
Ω. The internal differential
output resistance terminates induced noise and reflec-
tions from the primary termination located at the LVDS
receiver.
The MAX9153/MAX9154 current-steering output
requires a resistive load to terminate the signal and
complete the transmission loop. Because the devices
switch the direction of current flow and not voltage lev-
els, the output voltage swing is determined by the value
of the termination resistor multiplied by the output cur-
rent. With a typical 3.8mA output current, the
MAX9153/MAX9154 produce a 380mV output voltage
when driving a transmission line terminated with a 100
Ω
resistor (3.8mA x 100
Ω = 380mV). Logic states are
determined by the direction of current flow through the
termination resistor.
Fail-Safe
The fail-safe feature of the MAX9153 sets the outputs
high when the differential input is:
Open
Undriven and shorted
Undriven and terminated
Without a fail-safe circuit, when the input is undriven,
noise at the input may switch the outputs 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 an LVDS driver
output is in high impedance. A shorted input can occur
because of a cable failure.
When the input is driven with signals meeting the LVDS
standard, the input common-mode voltage is less than
VCC - 0.3V and the fail-safe circuit is not activated. If
the input is open, undriven and shorted, or undriven
and parallel terminated, an internal resistor in the fail-
safe circuit pulls both inputs above VCC - 0.3V, activat-
ing the fail-safe circuit and forcing the outputs high
(Figure 1).
The MAX9154 is essentially the MAX9153 without the
fail-safe circuit. The MAX9154 accepts input voltages
from 0 to VCC (vs. 0 to 2.4V for the MAX9153), which
allows interfacing to LVPECL input signals while retain-
ing a good common-mode tolerance.
Table 1. Input/Output Function Table
Note: VID = RIN+ - RIN-, VOD = DO_+ - DO_-
High = 450mV > VOD > 250mV
Low = -250mV > VOD > -450mV
MAX9153
VCC
RIN2
VCC - 0.3V
COMPARATOR
RIN1/2
RIN+
RIN-
RECEIVER
DO1+
DO1-
DO10+
DO10-
Figure 1. MAX9153 Input Fail-Safe Circuit
MAX9154
RIN3
RIN+
RIN-
DO1+
DO1-
DO10+
DO10-
VCC
RECEIVER
Figure 2. MAX9154 Input Bias Resistors
INPUT, VID
OUTPUTS, VOD
+50mV
High
-50mV
Low
Open
MAX9153
MAX9154
High
Undriven short
MAX9153
High
Undriven terminated
MAX9153
High
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9154 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Jitter.800Mbps.10-Port LVDS Repeaters with 100＜img src=http://dbserv.maxim-ic.com/images/ohm.gif width=12 height=9 Drive |
| MAX9154EUI | 制造商:Maxim Integrated Products 功能描述:LOW-JITTER, 800MBPS, 10-PORT LVDS REPEATERS W - Rail/Tube |
| MAX9154EUI+ | 制造商:Maxim Integrated Products 功能描述:LVDS REPEATER 0.45V 28TSSOP - Rail/Tube |
| MAX9154EUI+T | 制造商:Maxim Integrated Products 功能描述:LVDS REPEATER 0.45V 28TSSOP - Tape and Reel |
| MAX9155 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Jitter, Low-Noise LVDS Repeater in an SC70 Package |
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