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參數(shù)資料
| 型號： | LMS1485MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V Low Power RS-485 Differential Bus Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 224K |
| 代理商： | LMS1485MX |
Connection Diagram
8-Pin SOIC
20048802
Top View
Ordering Information
Package
Part Number
LMS1485M
LMS1485MX
LMS1485IM
LMS1485IMX
Package Marking
Transport Media
95 Units/Rail
2.5k Units Tape and Reel
95 Units/Rail
2.5k Units Tape and Reel
NSC Drawing
8-Pin SOIC
LMS1485M
M08A
LMS1485IM
Pin Descriptions
Pin
#
I/O
1
Name
RO
Function
Receiver Output: If A
>
B by 200 mV, RO will be high; If A
<
B by 200mV, RO will be low. RO
will be high also if the inputs (A and B) are open (non-terminated)
Receiver Output Enable: RO is enabled when RE is low; RO is in TRI-STATE when RE is high
Driver Output Enable: The driver outputs (A and B) are enabled when DE is high; they are in
TRI-STATE when DE is low. Pins A and B also function as the receiver input pins (see below)
Driver Input: A low on DI forces A low and B high while a high on DI forces A high and B low
when the driver is enabled
Ground
Non-inverting Driver Output and Receiver Input pin. Driver Output levels conform to RS-485
signaling levels
Inverting Driver Output and Receiver Input pin. Driver Output levels conform to RS-485 signaling
levels
Power Supply: 4.75V
≤
V
CC
≤
5.25V
O
2
3
I
I
RE
DE
4
I
DI
5
6
N/A
I/O
GND
A
7
I/O
B
8
N/A
V
CC
Truth Table
DRIVER SECTION
RE
X
X
X
DE
H
H
L
DI
H
L
X
A
H
L
Z
B
L
H
Z
RECEIVER SECTION
RE
DE
L
L
X
L
A-B
≥
+0.2V
≤
0.2V
X
OPEN
*
RO
H
L
Z
H
L
L
H
L
Note:
*
= Non Terminated, Open Input only
X = Irrelevant
Z = TRI-STATE
H = High level
L = Low level
L
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LMS1487 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:5V Low Power RS-485 / RS-422 Differential Bus Transceiver |
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| LMS1487CM | 制造商:Texas Instruments 功能描述:BUS TRANSCEIVER 1487 SOIC8 5V |
| LMS1487CM/NOPB | 制造商:Texas Instruments 功能描述: |
| LMS1487CMX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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