LMH6574MAX

更新时间： 2024-01-29 18:20:33

品牌	Logo	应用领域
美国国家半导体 - NSC		复用器光电二极管
页数	文件大小	规格书
15页	857K
描述
4:1 High Speed Video Multiplexer

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技术参数
数据手册
替代型号

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LMH6574MAX 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	SSOP, SOP14,.25	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.25	模拟集成电路 - 其他类型：	VIDEO MULTIPLEXER
JESD-30 代码：	R-PDSO-G14	JESD-609代码：	e3
长度：	8.64 mm	湿度敏感等级：	1
负电源电压最大值（Vsup）：	-6 V	负电源电压最小值（Vsup）：	-3 V
标称负供电电压 (Vsup)：	-3.3 V	信道数量：	4
功能数量：	1	端子数量：	14
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SOP14,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	+-3.3/+-5 V	认证状态：	Not Qualified
座面最大高度：	1.75 mm	最大信号电流：	0.02 A
子类别：	Multiplexer or Switches	最大供电电流 (Isup)：	18 mA
最大供电电压 (Vsup)：	6 V	最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	3.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	3.9 mm	Base Number Matches：	1

LMH6574MAX 数据手册

Other Applications (Continued)

output under capacitive loading. Capacitive loads of

5 to 120 pF are the most critical, causing ringing, frequency

response peaking and possible oscillation. The chart “Sug-

gested R_OUTvs. Cap Load” gives a recommended value for

selecting a series output resistor for mitigating capacitive

loads. The values suggested in the charts are selected for

0.5 dB or less of peaking in the frequency response. This

gives a good compromise between settling time and band-

width. For applications where maximum frequency response

is needed and some peaking is tolerable, the value of R_OUT

can be reduced slightly from the recommended values.

20119714

FIGURE 8. Frequency Response vs. Capacitive Load

LAYOUT CONSIDERATIONS

20119724

Whenever questions about layout arise, use the evaluation

board as a guide. The LMH730276 is the evaluation board

supplied with samples of the LMH6574. To reduce parasitic

capacitances, ground and power planes should be removed

near the input and output pins. For long signal paths con-

trolled impedance lines should be used, along with imped-

ance matching elements at both ends. Bypass capacitors

should be placed as close to the device as possible. Bypass

capacitors from each rail to ground are applied in pairs. The

larger electrolytic bypass capacitors can be located farther

from the device, the smaller ceramic capacitors should be

placed as close to the device as possible. In Figure 1, the

capacitor between V⁺and V⁻is optional, but is recom-

mended for best second harmonic distortion. Another way to

enhance performance is to use pairs of 0.01µF and 0.1µF

ceramic capacitors for each supply bypass.

FIGURE 6. Decoupling Capacitive Loads

POWER DISSIPATION

The LMH6574 is optimized for maximum speed and perfor-

mance in the small form factor of the standard SOIC pack-

age. To ensure maximum output drive and highest perfor-

mance, thermal shutdown is not provided. Therefore, it is of

utmost importance to make sure that the T_JMAXis never

exceeded due to the overall power dissipation.

20119715

FIGURE 7. Suggested R_OUTvs. Capacitive Load

Follow these steps to determine the Maximum power dissi-

pation for the LMH6574:

1. Calculate the quiescent (no-load) power: P_AMP= I_CC

(V_S), where V_S= V⁺- V⁻.

2. Calculate the RMS power dissipated in the output stage:

P_D(rms) = rms ((V_S- V_OUT) * I_OUT), where V_OUTand

I_OUTare the voltage across and the current through the

external load and V_Sis the total supply voltage.

3. Calculate the total RMS power: P_T= P_AMP+ P_D.

The maximum power that the LMH6574 package can dissi-

pate at a given temperature can be derived with the following

equation:

P_MAX= (150˚ – T_AMB)/ θ_JA, where T_AMB= Ambient tempera-

ture (˚C) and θ_JA= Thermal resistance, from junction to

ambient, for a given package (˚C/W). For the SOIC package

θ_JAis 130 ˚C/W.

www.national.com

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LMH6574MAX 替代型号

型号	品牌	替代类型	描述	数据表
LMH6574MA/NOPB	TI	功能相似	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40
LMH6574MA	TI	功能相似	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40
LMH6574MAX/NOPB	TI	功能相似	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40

与LMH6574MAX相关器件

型号	品牌	获取价格	描述	数据表
LMH6574MAX/NOPB	NSC	获取价格	IC 4-CHANNEL, VIDEO MULTIPLEXER, PDSO14, SOIC-14, Multiplexer or Switch
LMH6574MAX/NOPB	TI	获取价格	具有 4:1 高速多路复用器的 500MHz 高速运算放大器 \| D \| 14 \| -40
LMH6580	NSC	获取价格	8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2
LMH6580	TI	获取价格	具有可选增益的 5V、交叉点/交换、8 输入 4 输出 500MHz 开关
LMH6580VS	NSC	获取价格	8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2
LMH6580VS/NOPB	TI	获取价格	具有可选增益的 5V、交叉点/交换、8 输入 4 输出 500MHz 开关 \| PFB \|
LMH6580VSX	TI	获取价格	IC 8-CHANNEL, CROSS POINT SWITCH, PQFP48, TQFP-48, Multiplexer or Switch
LMH6581	NSC	获取价格	8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2
LMH6581VS	NSC	获取价格	8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2
LMH6581VS/NOPB	TI	获取价格	8-CHANNEL, CROSS POINT SWITCH, PQFP48, LEAD FREE, TQFP-48

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