- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385892 > SY58621LMG (MICREL INC) Precision 3.2Gbps CML/LVPECL Backplane Transceiver with Integrated Loopback PDF資料下載
參數(shù)資料
| 型號(hào)： | SY58621LMG |
| 廠商： | MICREL INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Precision 3.2Gbps CML/LVPECL Backplane Transceiver with Integrated Loopback |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, QCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, MLF-24 |
| 文件頁(yè)數(shù)： | 11/19頁(yè) |
| 文件大小： | 308K |
| 代理商： | SY58621LMG |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)
Micrel, Inc.
SY58621L
January 2006
11
M9999-012006-B
hbwhelp@micrel.com
or (408) 955-1690
Detailed Description
Receiver
The receiver AC-coupled differential input distributes
data to 3.2Gbps with signals as small as 10mV
(20mV
PP
) or as large as 900mV (1.8V
PP
). The receiver
input features an internal 50
input termination
connected to an internal reference which optimizes
the inputs for AC-coupled signals. Input signals are
linearly amplified with 38dB of differential gain and the
output signal is limited to 400mV (800mV
PP
).
The receiver output buffer features 50
source
termination resistors and a current source that
provides 400mV (800mV
PP
) swing into 50
termination. The output buffers terminates to standard
CML loads (100
across the output pair or
equivalent). See the “Output Stage Receiver” section
for more details.
Transmitter
The transmitter differential input includes Micrel’s
unique, patented 3-pin input termination architecture
that directly interfaces to any (AC- or DC-coupled)
differential signal as small as 100mV (200mV
PP
)
without any termination resistor network in the signal
path.
The transmitter output buffer terminates to standard
LVPECL loads (R
L
= 50
_
to V
CC_TXQ
-2V). The output buffer
is a special variable swing LVPECL buffer controlled by
TXVCTRL. The output buffer features emitter follower
output that provides 80mV (160mV
PP
) to 800mV (1.6V
PP
)
swing into 50
_
transmission lines. See the next section
and Figures 1a and 1b for more details on how to control
the variable output swing feature
.
Figure 1a. Voltage Source Implementation
Figure 1b. Alternative Implementation
Transmitter PECL Variable-Swing Output Buffer
Connecting V
REF_CTRL
to TXVCTRL sets the
transmitter output buffer to maximum swing
Setting TXVCTRL to V
CC_TXQ
, sets the transmitter
output buffer to minimum swing
Control of the transmitter output swing buffers can
be obtained by using a variable resistor connected
between V
REF_CTRL
and V
CC_TXQ
with a wiper
connected to TXVCTRL as shown in Figure 1b
Receiver LOS
The SY58621L features a chatter-free Loss-of-Signal
(LOS) TTL compatible output with an internal 4.75k
pull-up resistor. LOS circuitry monitors the input
receiver signal and asserts a signal when the input
signal falls below the threshold set by the
programmable LOS level set pin (LOSLVL). When the
amplitude of the receiver input signal falls below the
threshold, LOS is asserted HIGH with a response time
of ~0.2uS. LOS can be fed into /RXEN to maintain
output stability by disabling the output during a Loss-
of-Signal condition. Figure 2a and 2b shows the LOS
connection to /RXEN. When /RXEN is HIGH, the
output signal RXQ is held LOW and /RXQ is held
HIGH. Typically, 2dB of LOS hysteresis is adequate to
prevent the receiver output from chattering. LOS
operation is optimized for data rates
≥
622Mbps with
an input receiver amplitude of at least 10mV
(20mV
PP
). Due to the long time constant in slower
data rates below 622Mbps, the SY58621L LOS
function does not guarantee chatter-free operation for
low amplitude signals.
LOSLVL sets the threshold of the LOS input amplitude
detection. Connecting an external resistor, R
LOSLVL
,
between VCC and LOSLVL sets the input amplitude
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SY58621LMGTR | Precision 3.2Gbps CML/LVPECL Backplane Transceiver with Integrated Loopback |
| SY58626L | DC-to-6.4Gbps Backplane Transmit Buffer with Selectable Output Pre-emphasis, I/O DCOffset Control, and 200mV-3.0VPP Output Swing |
| SY58626LMH | DC-to-6.4Gbps Backplane Transmit Buffer with Selectable Output Pre-emphasis, I/O DCOffset Control, and 200mV-3.0VPP Output Swing |
| SY58626LMHTR | DC-to-6.4Gbps Backplane Transmit Buffer with Selectable Output Pre-emphasis, I/O DCOffset Control, and 200mV-3.0VPP Output Swing |
| SY58627L | DC-to-6.4Gbps Backplane Receive Buffer with Four Stage Programmable Equalization and DC-Offset Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY58621LMG TR | 功能描述:總線收發(fā)器 4.25Gbps Transceiver w/ CML/LVPECL Outputs (I Temp, Green) RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SY58621LMGTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision 3.2Gbps CML/LVPECL Backplane Transceiver with Integrated Loopback |
| SY58626L | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DC-to-6.4Gbps Backplane Transmit Buffer with |
| SY58626L_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DC-to-6.4Gbps Backplane Transmit Buffer with |
| SY58626LMH | 功能描述:總線發(fā)射器 6.4Gbps Transmitter w/ Pre-emphasis (Green) RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:135 Mpps 接口: 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-56 封裝:Reel |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。