Datasheet > IMP2119CPW/T

IMP2119CPW/T

更新时间： 2024-02-21 04:55:27

品牌	Logo	应用领域
A1PROS		/
页数	文件大小	规格书
9页	447K
描述
Interface Circuit

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技术参数
数据手册

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IMP2119CPW/T 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.68
Base Number Matches：	1

IMP2119CPW/T 数据手册

IMP2119

Pin Description

Pin Name

Function

R,(1,2,3,4,5,6,7,8)N

R(1,2,3,4,5,6,7,8)P

TPWR

Negative signal termination lines for LVD mode. Signal termination lines for SE mode.

Positive signal termination lines for LVD mode. Pseudo-ground lines for SE mode.

Power supply pin for terminator. Connect to SCSI bus TermPwr. Must be decoupled by one

4.7µF low-ESR capacitor for every three terminator devices. It is absolutely necessary to

connect this pin to the decoupling capacitor through a very low impedance (big traces on PCB).

Keeping distances very short from the decoupling capacitors to theTPWR pin is also critical.

The value of the decoupling capacitor is somewhat layout dependant and some applications

may benefit from an additional 0.1µF decoupling capacitor at the TPWR pin.

ISO

Enables / disables terminator. See Table 2 for logic levels

GND

Terminator ground pin. Connect to gro.und

MASTER / SLAVE

Sometimes referred to as M/S pin. Used to select which terminator is the controlling device.

MASTER/SLAVE pin HIGH or Open enables the DIFFSENSE output drive. See Table 1.

DIFFSENSE

This is a dual function pin. It drives the SCSI bus DIFFSENS line. It is also the sense pin to

detect the SCSI bus mode (LVD, SE or HVD). DIFFSENSE output drive can be disabled with a

LOW level on the MASTER/SLAVE pin. See Table 1 and Table 2. Internally connected to DIFF

_CAP pin trough 20Kohms resistor.

DIFF_CAP

Internally connected to DIFFSENSE pin through 20kΩ resistor. It can be used as a mode sense

pin when the device is a non-controlling terminator (MASTER/SLAVE pin is LOW). An RC filter

(20kΩ / 0.1µF) is not required on the IMP2119 , as it has an internal timer.

N.C.

No Connect. Pins should be left open.

Data Communications

1 234 5 6 7...9

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