Datasheet > DS21T26

DS21T26

更新时间： 2024-10-28 21:21:47

品牌	Logo	应用领域
美信 - MAXIM		光电二极管
页数	文件大小	规格书
6页	138K
描述
Bus Terminator, MOS, PDSO36,

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中文翻译

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技术参数
数据手册

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DS21T26 技术参数

是否Rohs认证：	不符合	生命周期：	Active
Reach Compliance Code：	not_compliant	风险等级：	5.46
JESD-30 代码：	R-PDSO-G36	JESD-609代码：	e0
端子数量：	36	最高工作温度：	70 °C
最低工作温度：		封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装等效代码：	SOP36,.4,32
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, SHRINK PITCH
电源：	5 V	认证状态：	Not Qualified
子类别：	Bus Terminators	标称供电电压：	5 V
表面贴装：	YES	技术：	MOS
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.8 mm
端子位置：	DUAL	Base Number Matches：	1

DS21T26 数据手册

DS21T26

PRODUCT PREVIEW

DS21T26

SCSI Terminator, 27–Line, SE

FEATURES

PIN ASSIGNMENT

• Fully compliant with SCSI, Fast SCSI and Ultra SCSI

R23

R24

• Provides active termination for 27 signal lines

• 5% tolerance on termination resistance and termina-

tion current

R22

DS21T26

R21

R20

R25

R26

• Low power down capacitance of 3 pF

• Onboard thermal shutdown circuitry

• SCSI bus hot–plug compatible

R27

R19

GND

REF

GND

• Fully supports actively negated SCSI signals

• Active high power–down

R10

PWR

R18

R17

R16

R15

R11

R12

R13

R14

36–PIN SSOP (TOP VIEW)

B PACKAGE

DESCRIPTION

Fast SCSI and Ultra SCSI require the use of active ter-

mination at both ends of every cable segment in a SCSI

system with single ended drivers and receivers. Ultra

SCSI requires the support of active negation and hot

plugging. The DS21T26 is fully compliant with these

standards.

Active termination provides greater immunity to voltage

drops on the TERMPWR (termination power) line,

enhanced high level noise immunity, intrinsic

TERMPWR decoupling, and very low quiescent cur-

rent. A single DS21T26 can be used to terminate awide

SCSI bus (27 lines).

TheDS21T26integratesalowdropoutregulatorand27

precise switched 100 Ohm termination resistors into a

36 pin SSOP package.

For the SE termination, one low drop–out regulator and

27 precise 110 Ohm resistors are used.

022798 1/6

12 3 4 5 6

中文翻译

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