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| 型号： | MAX4885EETG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLEXER 2X1 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 功能： | 多路复用器 |
| 电路： | 1 x 2:1 |
| 导通状态电阻： | 7.5 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 5.5 V |
| 电流 - 电源： | 1µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
Horizontal/Vertical Sync Level Shifter
HSYNC/VSYNC are buffered to provide level shifting
and drive capability to meet the VESA specification.
Display-Data Channel Multiplexer
The MAX4885E provides two voltage-clamped switches
to route DDC signals (see Table 3). Each switch clamps
signals to a diode drop less than the voltage applied on
VL. Supply +3.3V on VL to provide voltage clamping for
VESA I2C-compatible signals. If voltage clamping is not
required, connect VL to VCC. The SDA_ and SCL_
switches are identical, and each switch can be used to
route either SDA_ and SCL_ signals.
ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. Additionally, the MAX4885E is protected to
±15kV on RGB, HSYNC, VSYNC, SDA_ and SCL_
outputs by the Human Body Model (HBM). See the
Pin
Description section. For optimum ESD performance,
bypass each VCC pin to ground with a 0.1F or larger
ceramic capacitor.
Human Body Model (HBM)
Several ESD testing standards exist for measuring the
robustness of ESD structures. The ESD protection of
the MAX4885E is characterized with the Human Body
Model. Figure 3 shows the model used to simulate an
ESD event resulting from contact with the human body.
The model consists of a 100pF storage capacitor that is
charged to a high voltage, then discharged through a
1.5kΩ resistor. Figure 4 shows the current waveform
when the storage capacitor is discharged into a low
impedance.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Please contact Maxim for a reliability report document-
ing test setup, methodology, and results.
Applications Information
The MAX4885E provides the level shifting necessary to
drive two standard VGA ports from a graphics con-
troller as low as +2.2V. Internal buffers drive the
HSYNC and VSYNC signals to VGA standard TTL lev-
els. The DDC multiplexer provides level shifting by
clamping signals to a diode drop less than VL (see the
Typical Operating Circuit). Connect VL to +3.3V for nor-
mal operation, or to VCC to disable voltage clamping for
DDC signals.
Power-Supply Decoupling
Bypass each VCC pin and VL to ground with a 0.1F
or larger ceramic capacitor as close as possible to the
device.
PCB Layout
High-speed switches such as the MAX4885E require
proper PCB layout for optimum performance. Ensure
that impedance-controlled PCB traces for high-speed
signals are matched in length and as short as possible.
Connect the exposed pad to a solid ground plane.
Chip Information
PROCESS: BiCMOS
MAX4885E
Ultra-Low Capacitance 1:2 VGA
Switch with ±15kV ESD
8
_______________________________________________________________________________________
EN
FUNCTION
0
H_, V_ = 0
Table 2. HV Truth Table
X = Don’t care.
EN
SEL
FUNCTION
10
SDA0 to SDA1
SCL0 to SCL1
11
SDA0 to SDA2
SCL0 to SCL2
0
X
SDA_, SCL_, high impedance
Table 3. DDC Truth Table
X = Don’t care.
EN
SEL
FUNCTION
10
R0 to R1
G0 to G1
B0 to B1
11
R0 to R2
G0 to G2
B0 to B2
0
X
R_, B_, and G_, high impedance
Table 1. RGB Truth Table
X = Don’t care.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4885EETG+ | 功能描述:视频开关 IC Ultra Low-Cap VGA Switch RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX4885EETG+CK2 | 功能描述:视频开关 IC Ultra Low-Cap VGA Switch RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX4885EETG+T | 功能描述:视频开关 IC Ultra Low-Cap VGA Switch RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX4885EETG+TCK2 | 功能描述:视频开关 IC Ultra Low-Cap VGA Switch RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX4885EEVKIT+ | 功能描述:交换机 IC 开发工具 MAX4885E Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
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