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SN75LBC978

更新时间： 2024-11-05 22:27:23
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
16页 239K
描述
9-CHANNEL DIFFERENTIAL TRANSCEIVER

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SN75LBC978 数据手册

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SN75LBC978  
9-CHANNEL DIFFERENTIAL TRANSCEIVER  
SLLS134E – APRIL 1992 – REVISED MAY 1997  
Nine Differential Channels for the Data and  
Control Paths of the Differential Small  
Computer Systems Interface (SCSI)  
DL PACKAGE  
(TOP VIEW)  
NC  
WRAP2  
WRAP1  
1A  
1DE/RE  
2A  
2DE/RE  
3A  
3DE/RE  
4A  
NC  
NC  
CE  
Meets or Exceeds the Requirements of  
ANSI Standard RS-485 and ISO  
8482:1987(E)  
1
56  
55  
54  
2
3
4
53 9B+  
52 9B–  
Packaged in Shrink Small-Outline Package  
With 25-mil Terminal Pitch  
5
6
51  
50  
49  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
8B+  
8B–  
7B+  
7B–  
6B+  
6B–  
Designed to Operate at 10 Million Transfers  
Per Second  
7
8
Low Disabled Supply Current  
1.4 mA Typ  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
Thermal Shutdown Protection  
4DE/RE  
Power-Up/Power-Down Glitch Protection  
V
V
CC  
CC  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
Positive and Negative Output-Current  
Limiting  
Open-Circuit Fail-Safe Receiver Design  
description  
V
V
CC  
5A  
CC  
The SN75LBC978 is a nine-channel differential  
5B+  
5B–  
4B+  
4B–  
3B+  
3B–  
2B+  
2B–  
1B+  
1B–  
transceiver based on the 75LBC176 LinASIC  
5DE/RE  
6A  
6DE/RE  
7A  
7DE/RE  
8A  
8DE/RE  
9A  
†
cell. Use of TI’s LinBiCMOS  
process technolo-  
gy allows the power reduction necessary to  
integrate nine differential balanced transceivers .  
†
On-chip enabling logic makes this device  
applicable for the data path (eight data bits plus  
parity)andthecontrolpath(ninebits)fortheSmall  
Computer Systems Interface (SCSI) standard.  
The WRAP function allows in-circuit testing and  
wired-OR channels for the BSY, RST, and SEL  
signals of the SCSI bus.  
9DE/RE  
Pins 13 through 17 and 40 through 44 are  
connected together to the package lead  
frame and signal ground.  
The SN75LBC978 is packaged in a shrink  
small-outline package (DL) with improved thermal  
characteristics using heat-sink terminals. This  
package is ideal for low-profile, space-restricted  
applications such as hard disk drives.  
The switching speed of the SN75LBC978 is sufficient to transfer data over the data bus at 10 million transfers  
per second. Each of the nine identical channels conforms to the requirements of the ANSI RS-485 and  
ISO 8482:1987(E) standards referenced by ANSI X3.131-1993 (SCSI-2) and the proposed SCSI-3 standards.  
The SN75LBC978 is characterized for operation from 0°C to 70°C.  
†
Patent Pending  
LinASIC and LinBiCMOS are trademarks of Texas Instruments Incorporated.  
Copyright 1997, 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...16

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SN75LBC978 替代型号

型号 品牌 替代类型 描述 数据表
TPD2E007 TI

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