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参数资料
| 型号： | DS21T05Z |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/7页 |
| 文件大小： | 0K |
| 描述： | IC TERMINATOR SCSI 150MIL 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | SCSI，LVD，SE |
| 端子数： | 9 |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
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FEATURES
Fully compliant with SCSI-1, Fast SCSI and
Ultra SCSI
Functionally compatible to the DS21T07,
targeted for high volume applications
Provides active termination for nine signal
lines
Laser-trimmed 110-ohm termination resistors
have 5% tolerance
Low dropout voltage
Power-down mode isolates termination
resistors from the bus
SCSI bus hot-plug compatible
Fully supports actively negated SCSI signals
Onboard thermal shutdown circuitry
16-pin plastic narrow SOIC
PIN ASSIGNMENT
DESCRIPTION
Fast SCSI and Ultra SCSI require the use of active terminations at both ends of every cable segment in a
SCSI system with single-ended drivers and receivers. The DS21T05 SCSI Terminator, which is fully
compliant with these standards, enables the designer to gain the benefits of active termination: greater
immunity to voltage drops on the TERMPWR (TERMination PoWeR) line, enhanced high-level noise
immunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption. The DS21T05,
which integrates a regulator and nine precise-switched, 110-ohm termination resistors into a monolithic
IC, is a functionally compatible version of the DS21T07. With relaxed output current and termination
tolerances, the DS21T05 is intended for high volume applications which require active termination but
not the high performance of the DS21T07.
FUNCTIONAL DESCRIPTION
The DS21T05 consists of a bandgap reference, buffer amplifier, and nine termination resistors (Figure 1).
The bandgap reference circuit produces a precise 2.55V level which is fed to a buffer amplifier. The
buffer produces a 2.85V level and is capable of sourcing at least 24 mA into each of the termination
resistors when the signal line is low (active). When the driver for a given signal line turns off, the
terminator will pull the signal line to 2.85V (quiescent state). To handle actively negated SCSI signals,
DS21T05
SCSI Terminator
www.dalsemi.com
1
2
3
4
5
6
7
8
TERMPWR1
R1
R3
R4
R5
VREF1
GND
R2
DS21T05Z 16-Pin SOIC (150-mil)
13
16
15
14
12
11
10
9
PD
VREF2
R9
R7
R6
NC
TERMPWR2
R8
1
2
3
4
5
6
7
8
13
16
15
14
12
11
10
9
PD
VREF2
NC
R8
R7
R6
TERMPWR2
R9
TERMPWR1
R1
R3
R4
R5
VREF1
GND
R2
DS21T05S 16-Pin SOIC (300-mil)
相关PDF资料 |
PDF描述 |
|---|---|
| VI-J62-IY-F4 | CONVERTER MOD DC/DC 15V 50W |
| DS21T05S/T&R | IC TERMINATOR SCSI 300MIL 16SOIC |
| VI-J62-IY-F3 | CONVERTER MOD DC/DC 15V 50W |
| VI-J62-IY-F2 | CONVERTER MOD DC/DC 15V 50W |
| D38999/26FJ24PD | CONN PLUG 24POS STRAIGHT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21T05Z/T&R | 制造商:Maxim Integrated Products 功能描述:SCSI TERM. 5% 16P 150MIL SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TERMINATOR SCSI 150MIL 16SOIC |
| DS21T05Z/T&R | 功能描述:SCSI 接口集成电路 RoHS:否 制造商:Texas Instruments 工作电源电压:2.7 V to 5.25 V 电源电流:13 mA 最大工作温度:+ 70 C 最小工作温度:0 C 安装风格:SMD/SMT 封装 / 箱体:SSOP-36 封装:Tube |
| DS21T05Z+ | 功能描述:SCSI 接口集成电路 RoHS:否 制造商:Texas Instruments 工作电源电压:2.7 V to 5.25 V 电源电流:13 mA 最大工作温度:+ 70 C 最小工作温度:0 C 安装风格:SMD/SMT 封装 / 箱体:SSOP-36 封装:Tube |
| DS21T05Z+T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS21T05Z+T&R | 功能描述:SCSI 接口集成电路 RoHS:否 制造商:Texas Instruments 工作电源电压:2.7 V to 5.25 V 电源电流:13 mA 最大工作温度:+ 70 C 最小工作温度:0 C 安装风格:SMD/SMT 封装 / 箱体:SSOP-36 封装:Tube |
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