參數(shù)資料
型號(hào): EL4332CSZ-T13
廠商: Intersil
文件頁(yè)數(shù): 15/15頁(yè)
文件大?。?/td> 0K
描述: MUX/AMP TRIPLE 2:1 300MHZ 16SOIC
標(biāo)準(zhǔn)包裝: 2,500
應(yīng)用: 2:1 多路復(fù)用器-放大器
電路數(shù): 3
-3db帶寬: 300MHz
轉(zhuǎn)換速率: 650 V/µs
電流 - 電源: 48mA
電流 - 輸出 / 通道: 40mA
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC
包裝: 帶卷 (TR)
9
Logic Inputs
The A/B select, logic input, is internally referenced to
ground. It is set at 2 diode drops above ground, to give a
threshold of about 1.4V (see Figure 27). The PNP input
transistor requires that the driving gate be able to sink
current, typically < 30A, for a logic “l(fā)ow”. If left to float, it will
be a logic “high”.
The input PNP transistors have sufficient gain that a simple
level shift circuit (see Figure 28) can be used to provide a
simple interface with Emitter Coupled Logic. Typically,
200mV is enough to switch from a solid logic “l(fā)ow” to a
“high.”
The capacitor CFF is only in the network to prevent the A/B
pin’s capacitance from slowing the control signal. The
network shown level shifts the ECL levels, -0.7V to -1.5V to
+1.6V and +1.1V respectively. The terminating resistor, RTT,
is required since the open emitter of the ECL gate can not
sink current. If a -2V rail is not being used, a 220
to 330
resistor to the -5.2V rail would have the same effect.
FIGURE 27. SIMPLIFIED LOGIC INPUT STAGE
FIGURE 28. ADAPTING THE SELECT PIN
FOR ECL LOGIC LEVELS
EL4332
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