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SN75971B2DL PDF预览

SN75971B2DL

更新时间： 2024-11-09 11:07:59
品牌 Logo 应用领域
德州仪器 - TI 驱动光电二极管接口集成电路线路驱动器或接收器转换器驱动程序和接口
页数 文件大小 规格书
15页 210K
描述
SCSI 差动转换器 - 数据 | DL | 56 | 0 to 70

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SN75971B2DL 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SSOP
包装说明：SSOP,针数：56
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：1.57
差分输出：YES驱动器位数：9
高电平输入电流最大值：0.0001 A输入特性：DIFFERENTIAL SCHMITT TRIGGER
接口集成电路类型：LINE TRANSCEIVER接口标准：X3.131; X3.277; EIA-485; SCSI-2; SCSI-3; ISO 8482
JESD-30 代码：R-PDSO-G56JESD-609代码：e4
长度：18.415 mm湿度敏感等级：2
功能数量：9端子数量：56
最高工作温度：70 °C最低工作温度：
输出特性：TOTEM-POLE最大输出低电流：0.016 A
输出极性：TRUE封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified最大接收延迟：15 ns
接收器位数：9座面最大高度：2.79 mm
最大压摆率：66 mA最大供电电压：5.25 V
最小供电电压：4.75 V标称供电电压：5 V
电源电压1-最大：5.25 V电源电压1-分钟：4.75 V
电源电压1-Nom：5 V表面贴装：YES
温度等级：COMMERCIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
最大传输延迟：12 ns宽度：7.5 mm
Base Number Matches：1

SN75971B2DL 数据手册

 浏览型号SN75971B2DL的Datasheet PDF文件第2页浏览型号SN75971B2DL的Datasheet PDF文件第3页浏览型号SN75971B2DL的Datasheet PDF文件第4页浏览型号SN75971B2DL的Datasheet PDF文件第5页浏览型号SN75971B2DL的Datasheet PDF文件第6页浏览型号SN75971B2DL的Datasheet PDF文件第7页 
SN75971B  
SCSI DIFFERENTIAL CONVERTER-DATA  
SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000  
Provides High-Voltage Differential SCSI  
From Single-Ended Controller When Used  
With the SN75970B Control Transceiver  
DGG OR DL PACKAGE  
(TOP VIEW)  
SDB  
DRVBUS  
GND  
ADBP–  
NC  
ADB7–  
NC  
ADB6–  
NC  
DSENS  
RESET  
GND  
1
56  
55  
54  
53  
52  
51  
50  
49  
48  
47  
46  
45  
44  
43  
Meets or Exceeds the Requirements of EIA  
Standard RS-485 and ISO-8482 Standards  
2
3
ESD Protection on Bus Pins to 12 kV  
BDBP–  
BDBP+  
BDB7–  
BDB7+  
BDB6–  
BDB6+  
BDB5–  
BDB5+  
4
Packaged in Shrink Small-Outline Package  
with 25 mil Terminal Pitch and Thin  
Small-Package with 20 mil Terminal Pitch  
5
6
7
Low Disabled-Supply Current 32 mA Typ  
Thermal Shutdown Protection  
8
9
ADB5–  
NC  
10  
11  
12  
13  
14  
Positive- and Negative-Current Limiting  
Power-Up/-Down Glitch Protection  
Open-Circuit Failsafe Receivers  
V
V
CC  
CC  
GND  
GND  
GND  
GND  
description  
GND 15  
42 GND  
GND  
GND  
GND  
GND  
16  
17  
18  
41  
40  
39  
The SN75971B SCSI differential converter-data is a  
9-channel RS-485 transceiver. When used in conjunc-  
tion with its companion control transceiver, the  
SN75970B, the resulting chip set provides the superior  
electrical performance of differential SCSI from a  
single-ended SCSI bus or controller. A 16-bit  
Ultra-SCSI (or Fast-20) SCSI bus can be implemented  
with just three devices (two data and one control) in the  
space efficient, 56-pin, shrink small-outline package  
(SSOP) or thin shink small outline package (TSSOP)  
and a few external components. An 8-bit SCSI bus  
requires only one data and one control transceiver.  
V
V
CC  
CC  
ABD4– 19  
NC 20  
38 BDB4–  
37 BDB4+  
36 BDB3–  
35 BDB3+  
34 BDB2–  
33 BDB2+  
32 BDB1–  
31 BDB1+  
30 BDB0–  
29 BDB0+  
ADB3– 21  
NC 22  
ADB2– 23  
NC 24  
ADB1– 25  
NC 26  
ADB0– 27  
NC 28  
The SN75971B is available in a B2 (20 Mxfer)  
version and a B1 (10 Mxfer) version.  
Pins13–17and40–44areconnected  
togethertothepackageleadframeand  
to signal ground.  
In a typical differential SCSI node, the SCSI controller  
provides an enable for each external RS-485  
transceiver channel. This could require as many as 27  
NC – No internal connection  
extra terminals for a 16-bit differential bus controller or relegate a 16-bit, single-ended controller to only an 8-bit  
differential bus. Using the standard nine SCSIcontrol signals, the SN75970B control transceiver decodes the  
state of the bus and enables the SN75971B data transceiver to transmit the single-ended SCSI input signals  
(A side) differentially to the cable or receive the differential cable signals (B side) and drive the single-ended  
outputs to the controller.  
A reset function, which disables all outputs and clears internal latches, can be accomplished from two external  
inputs and two internally-generated signals. RESET (reset) and DSENS (differential sense) are available to  
external circuits for a bus reset or to disable all outputs should a single-ended cable be inadvertently connected  
to a differential connector. Internally-generated power-up and thermal-shutdown signals have the same affect  
when the supply voltage is below approximately 3.5 V or the junction temperature exceeds 175°C.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2000, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...15

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