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| 型號(hào)： | MAX9218ETM+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 2/15頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DESERIALIZER LVDS 48-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | 解串器 |
| 數(shù)據(jù)速率： | 700Mbps |
| 輸入類型： | LVDS |
| 輸出類型： | LVCMOS |
| 輸入數(shù)： | 1 |
| 輸出數(shù)： | 27 |
| 電源電壓： | 3 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFN-EP（6x6） |
| 包裝： | 帶卷 (TR) |
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MAX9218
27-Bit, 3MHz-to-35MHz
DC-Balanced LVDS Deserializer
10
______________________________________________________________________________________
Detailed Description
The MAX9218 DC-balanced deserializer operates at a
parallel clock frequency of 3MHz to 35MHz, deserializ-
ing video data to the RGB_OUT[17:0] outputs when the
data enable output DE_OUT is high, or control data to
the CNTL_OUT[8:0] outputs when DE_OUT is low. The
video phase words are decoded using 2 overhead bits,
EN0 and EN1. Control phase words are decoded with 1
overhead bit, EN0. Encoding, performed by the
MAX9217 serializer, reduces EMI and maintains DC
balance across the serial cable. The serial input word
formats are shown in Table 1 and Table 2.
Control data inputs C0 to C4, each repeated over 3 seri-
al bit times by the serializer, are decoded using majority
voting. Two or three bits at the same state determine the
state of the recovered bit, providing single bit-error tol-
erance for C0 to C4. The state of C5 to C8 is deter-
mined by the level of the bit itself (no voting is used).
AC-Coupling Benefits
AC-coupling increases the input voltage of the LVDS
receiver to the voltage rating of the capacitor. Two
capacitors are sufficient for isolation, but four capaci-
tors—two at the serializer output and two at the deseri-
alizer input—provide protection if either end of the
cable is shorted to a high voltage. AC-coupling blocks
low-frequency ground shifts and common-mode noise.
The MAX9217 serializer can also be DC-coupled to the
MAX9218 deserializer. Figure 10 is the AC-coupled
serializer and deserializer with two capacitors per link,
and Figure 11 is the AC-coupled serializer and deseri-
alizer with four capacitors per link.
Applications Information
Selection of AC-Coupling Capacitors
See Figure 12 for calculating the capacitor values for
AC-coupling, depending on the parallel clock frequen-
cy. The plot shows capacitor values for two- and four-
capacitor-per-link systems. For applications using less
than 18MHz clock frequency, use 0.1F capacitors.
Termination and Input Bias
The IN+ and IN- LVDS inputs are internally connected
to +1.2V through 35k
Ω (min) to provide biasing for AC-
coupling (Figure 1). Assuming 100
Ω interconnect, the
LVDS input can be terminated with a 100
Ω resistor.
Match the termination to the differential impedance of
the interconnect.
Use a Thevenin termination, providing 1.2V bias, on an
AC-coupled link in noisy environments. For intercon-
nect with 100
Ω differential impedance, pull each LVDS
line up to VCC with 130
Ω and down to ground with 82Ω
at the deserializer input (Figure 10 and Figure 11). This
termination provides both differential and common-
mode termination. The impedance of the Thevenin ter-
mination should be half the differential impedance of
the interconnect and provide a bias voltage of 1.2V.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
EN0
EN1
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
Bit 0 is the LSB and is deserialized first. EN[1:0] are encoding bits. S[17:0] are encoded symbols.
Table 1. Serial Video Phase Word Format
0123456789
10
11
12
13
14
15
16
17
18
19
EN0
C0C0C0C1C1C1C2C2C2C3C3C3
C4C4C4C5C6C7C8
Bit 0 is the LSB and is deserialized first. C[8:0] are the mapped control inputs.
Table 2. Serial Control Phase Word Format
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參數(shù)描述 |
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| MAX9218EVKIT+ | 功能描述:界面開發(fā)工具 MAX9217/18 Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX921C/D | 功能描述:校驗(yàn)器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX921C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX921C/D+ | 功能描述:校驗(yàn)器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX921CPA | 功能描述:校驗(yàn)器 IC Single Comparator w/1% Precision Ref RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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