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参数资料
| 型号： | MAX4885ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 2X1 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 开关 |
| 电路： | 1 x 2:1 |
| 导通状态电阻： | 10 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
MAX4885
Complete VGA 1:2 or 2:1 Multiplexer
10
______________________________________________________________________________________
standard VGA signals. The charge pump can be dis-
abled to eliminate charge-pump noise; however, RGB
switch performance is slightly degraded. Connect QP
to ground for normal operation.
Horizontal/Vertical Sync Multiplexer
1:2 Multiplexer Mode
The MAX4885 provides two modes of operation for the
HSYNC and VSYNC signals. In 1:2 mode (M = 0), the
HSYNC/VSYNC inputs are buffered to provide level shift-
ing and drive capability to meet the VESA specification.
2:1 Multiplexer Mode
In 2:1 mode (M = 1), the HSYNC/VSYNC output buffers
are disabled, and switches pass signals directly. The
HSYNC and VSYNC switches/buffers are identical, and
either input can be used to route HSYNC and
VSYNC signals.
Display Data Channel Multiplexer
The MAX4885 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 VCL. Supply +3.3V on VCL to provide volt-
age clamping for VESA I2C-compatible signals. If volt-
age clamping is not required, connect VCL to V+. The
DDCA and DDCB switches are identical, and each
switch can be used to route either DDC signal.
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 MAX4885 is protected to
±8kV on RGB, HSYNC, VSYNC, and DDC switches by
the Human Body Model (HBM). For optimum ESD per-
formance, bypass each V+ 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 MAX4885 is characterized with the Human Body
Model. Figure 5 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
1.5k
Ω resistor. Figure 6 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
1:2 Multiplexer for Low-Voltage Graphics
Controllers
The MAX4885 provides the level shifting necessary to
drive two standard VGA ports from a graphics con-
troller as low as +2.2V. In 1:2 mode, internal buffers
drive the HSYNC and VSYNC signals to VGA standard
TTL levels. The DDC multiplexer provides level shifting
by clamping signals to a diode drop less than VCL (see
the Typical Operating Circuit). Connect VCL to +3.3V
for normal operation, or to V+ to disable voltage clamp-
ing for DDC signals.
EN
M
SEL
FUNCTION
00
0
1:2 Mode
Buffers Enabled
H0 to H1
V0 to V1
00
1
1:2 Mode
Buffers Enabled
H0 to H2
V0 to V2
01
0
2:1 Mode
Buffers Disabled
H0 to H1
V0 to V1
01
1
2:1 Mode
Buffers Disabled
H0 to H2
V0 to V2
1X
X
H_, V_
High Impedance
Table 2. HV Truth Table
X = Don’t Care
EN
SEL
FUNCTION
00
DDCA0 to DDCA1
DDCB0 to DDCB1
01
DDCA0 to DDCA2
DDCB0 to DDCB2
1X
DDCA_, DDCB_
High Impedance
Table 3. DDC Truth Table
X = Don’t Care
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4885ETJ+ | 功能描述:多路器开关 IC Complete VGA 1:2 or 2:1 MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX4885ETJ+T | 功能描述:视频开关 IC Complete VGA 1:2 or 2:1 MUX 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 |
| MAX4885ETJ-T | 功能描述:视频开关 IC 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 |
| MAX4885EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX4885 EVAL KIT - Boxed Product (Development Kits) |
| MAX4886ETJ | 功能描述:模拟开关 IC RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
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