翻页时钟网页版-设计资料资源-CSDN文库

翻页时钟

需积分: 13 200 浏览量 2022-11-29 13:35:17 上传评论收藏 113KB PDF 举报

资源详情

资源评论

SP490E/SP491E

Enhanced Full Duplex RS-485 Transceivers

■ +5V Only

■ Low Power BiCMOS

■ Driver/Receiver Enable (SP491E)

■ RS-485 and RS-422 Drivers/Receivers

■ Pin Compatible with LTC490 and

SN75179 (SP490E)

■ Pin Compatible with LTC491 and

SN75180 (SP491E)

■ Improved ESD Specifications:

±15kV Human Body Model

±15kV IEC1000-4-2 Air Discharge

±8kV IEC1000-4-2 Contact Discharge

DESCRIPTION…

The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422

standards up to 10Mbps. The SP491E is identical to the SP490E with the addition of driver

and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity,

over wide common mode range. The SP490E is available in 8-pin plastic DIP and 8-pin NSOIC

packages for operation over the commercial and industrial temperature ranges. The SP491E

is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and

industrial temperature ranges.

Vcc

GND

REB

GND

Vcc

GND

SP490E SP491E

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at

these ratings or any other above those indicated in the operation sections

of the specifications below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may affect reliability.

....................................................................................................+7V

Input Voltages

Drivers................................................-0.5V to (V

+0.5V)

Receivers..................................................................±14V

Output Voltages

Drivers......................................................................±14V

Receivers...........................................-0.5V to (V

+0.5V)

Storage Temperature....................................................-65˚C to +150˚

Power Dissipation.....................................................................1000mW

SPECIFICATIONS

MIN

to T

MAX

and V

= 5V ± 5% unless otherwise noted.

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP490E DRIVER

DC Characteristics

Differential Output Voltage GND V

Volts Unloaded; R = ∞;

see Figure 1

Differential Output Voltage 2 V

Volts With Load; R = 50Ω; (RS-422);

see Figure 1

Differential Output Voltage 1.5 V

Volts W

ith Load; R = 27Ω; (RS-485);

see Figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States 0.2 Volts R = 27Ω or R = 50Ω;

see Figure 1

Driver Common-Mode

Output Voltage 3 Volts R = 27Ω or R = 50Ω;

see Figure 1

Input High Voltage 2.0 Volts Applies to D

Input Low Voltage 0.8 Volts Applies to D

Input Current ±10 µA Applies to D

Driver Short-Circuit Current

OUT

= HIGH ±250 mA -7V ≤ V

≤ +12V

OUT

= LOW ±250 mA -7V ≤ V

≤ +12V

SP490E DRIVER

AC Characteristics

Maximum Data Rate 10 Mbps R

DIFF

= 54Ω, C

= C

= 100pF

Driver Input to Output 20 30 60 ns t

PLH

; R

DIFF

= 54Ω, C

= C

= 100pF;

see Figures 3 and 6

Driver Input to Output 20 30 60 ns t

PHL

; R

DIFF

= 54Ω, C

= C

= 100pF;

see Figures 3 and 5

Driver Skew 5 ns

see Figures 3 and 5,

SKEW

= | t

DPLH

- t

DPHL

Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R

DIFF

= 54Ω,

= C

= 100pF;

see Figures 3 and 5

SP490E

RECEIVER

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V ≤ V

≤ 12V

Input Hysteresis 70 mV V

= 0V

Output Voltage High 3.5 Volts I

= -4mA, V

= +200mV

Output Voltage Low 0.4 Volts I

= +4mA, V

= -200mV

Input Resistance 12 15 kΩ -7V ≤ V

≤ 12V

Input Current (A, B); V

= 12V ±1.0 mA V

= 12V

Input Current (A, B); V

= -7V -0.8 mA V

= -7V

Short-Circuit Current 85 mA 0V ≤ V

≤ V

剩余11页未读，继续阅读

评论收藏

内容反馈

翻页时钟网页版-设计资料

评论0

最新资源

翻页时钟网页版-设计资料

评论0

最新资源

相关推荐

翻页时钟 翻页时钟网页版

网页版翻页时钟，精美翻页时钟，HTML翻页时钟

网页版翻页时钟.zip

分别用Python和java设计翻页时钟网页版代码.docx

vue 翻页时钟网页版.zip

翻页时钟网页版（精美多功能翻页时钟源码）

翻页时钟网页版.rar

Flash翻页时钟、模拟时钟、数字时钟-源码

黑色翻页时钟HTML源码-倒计时单页翻页时钟HTML源码

jQuery 数字时钟，可翻页变换的网页时钟

翻页时钟网页版代码 html

网页设计很酷的图片翻页特效相册翻页

网页设计几种常见的翻页方式.pdf

安卓免费翻页时钟 Wow 时钟 1.1.0 中文多语免费版.zip

基于单片机at89c51控制的电子时钟-课题-设计报告--大学论文.doc

桌面时钟---精美桌面时钟

于基单片机的简易电子时钟设计设计--毕业设计.doc

网页特效--时钟代码

精美多功能翻页时钟HTML源码

基于单片机的新颖电子时钟系统--课程设计--学位论文.doc

时钟程序---时钟程序---可以自主控制时间，倒计时等。

android翻页时钟

STM32 ULN2003驱动28BYJ-48 工程源码文件

STM32项目设计：基于stm32f1的智能门锁（附项目视频全套教程）

第14届蓝桥杯单片机省赛题目

一包下载Keil5(MDK)带工具与教程

Keil5固件支持包(stm32f1xx/gd32f30x/nxplpc54114/stm32mp1xx)

STM32C8T6最小系统板原理图及PCB

2020级天津大学数字逻辑ALU4BITS（vivado）实验相关

翻页时钟翻页时钟网页版