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| 型号： | MAX4589CAP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC RF/VIDEO MUX DUAL 2CH 20-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 视频多路复用器 |
| 电路： | 2 x 2:1 |
| 导通状态电阻： | 60 欧姆 |
| 电压电源： | 单/双电源 |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，± 2.7 V ~ 6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
MAX4589
Low-Voltage, High-Isolation,
Dual 2-Channel RF/Video Multiplexer
______________________________________________________________________________________
13
_______________Detailed Description
Logic-Level Translators
The MAX4589 is constructed of high-frequency “T”
switches, as shown in Figure 8. The logic-level inputs
are translated by amplifier A1 into a V+ to V- logic sig-
nal that drives the internal control logic. The internal
control logic drives the gates of N-channel MOSFETs
N1 and N2 from V+ to V-, turning them fully on or off.
The same signal drives inverter A2 (which drives the P-
channel MOSFETs P1 and P2, turning them fully on or
off) from V+ to V-, and turns the N-channel MOSFET N3
on and off. The logic-level threshold is determined by
VL and GND.
Switch On Condition
When the switch is on, MOSFETs N1, N2, P1, and P2
are on and MOSFET N3 is off (Figure 8). The signal
path is COM_ to NO_, and because both N-channel
and P-channel MOSFETs act as pure resistances, it is
symmetrical (i.e., signals pass in either direction). The
off MOSFET, N3, has no DC conduction, but has a
small amount of capacitance to GND. The MAX4589’s
construction allows an exceptional 200MHz -3dB band-
width.
Frequency response in 75
systems is reasonably flat
up to 50MHz, with typically 2.5dB of insertion loss.
Higher-impedance circuits show even lower attenuation
(and vice versa), but slightly lower bandwidth due to
the increased effect of the internal and external capaci-
tance and the switch’s on-resistance.
The MAX4589 is optimized for ±5V operation. Using
lower supply voltages or a single supply increases
switching time, on-resistance (and therefore on-state
attenuation), and nonlinearity.
Switch Off Condition
When the switch is off, MOSFETs N1, N2, P1, and P2
are off and MOSFET N3 is on (Figure 8). The signal
path is through the parasitic off-capacitances of N1,
N2, P1, and P2, but it is shunted to ground by N3. This
forms a highpass filter whose exact characteristics are
dependent on the source and load impedances. In 75
systems, and below 1MHz, the attenuation exceeds
80dB. This value decreases with increasing frequency
and increasing circuit impedances. External capaci-
tance and board layout dominate overall performance.
tCSS
CS
SCLK
DIN
A0
A1
BIT 3
DISABLE
DOUT
NOTE: ALL INPUT SIGNALS ARE SPECIFIED WITH tR AND tF < 10ns.
TIMING IS MEASURED FROM 50% OF DIGITAL SIGNAL.
tDS
tDH
tDO
tCH
tCL
tCSH
MAX4589
Figure 7. Serial Timing Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4589CPP | 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 |
| MAX4589CWP | 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 |
| MAX4589CWP+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 |
| MAX4589CWP-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 |
| MAX4589EAP | 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 |
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