没有合适的资源?快使用搜索试试~ 我知道了~
首页CAN总线收发器芯片TJA1050T数据手册
CAN总线收发器芯片TJA1050T数据手册
需积分: 46 68 下载量 56 浏览量
更新于2023-03-16
评论 3
收藏 120KB PDF 举报
CAN总线收发器芯片TJA1050T数据手册。 TJA1050 是控制器区域网络(CAN)协议控制器和物理总线之间的接口,是一种标准的高速CAN收发器。TJA1050可以为总线提供差动发送性能,为CAN控制器提供差动接收性能。 TJA1050 是PCA82C250和PCA82C251高速CAN收发器的后继产品。
资源详情
资源评论
资源推荐
DATA SHEET
Product specification
Supersedes data of 2002 May 16
2003 Oct 22
INTEGRATED CIRCUITS
TJA1050
High speed CAN transceiver
2003 Oct 22 2
Philips Semiconductors Product specification
High speed CAN transceiver TJA1050
FEATURES
• Fully compatible with the
“ISO 11898”
standard
• High speed (up to 1 Mbaud)
• Very low ElectroMagnetic Emission (EME)
• Differential receiver with wide common-mode range for
high ElectroMagnetic Immunity (EMI)
• An unpowered node does not disturb the bus lines
• Transmit Data (TXD) dominant time-out function
• Silent mode in which the transmitter is disabled
• Bus pins protected against transients in an automotive
environment
• Input levels compatible with 3.3 V and 5 V devices
• Thermally protected
• Short-circuit proof to battery and to ground
• At least 110 nodes can be connected.
GENERAL DESCRIPTION
The TJA1050 is the interface between the Controller Area
Network (CAN) protocol controller and the physical bus.
The device provides differential transmit capability to the
bus and differential receive capability to the CAN
controller.
The TJA1050 is the third Philips high-speed CAN
transceiver after the PCA82C250 and the PCA82C251.
The most important differences are:
• Much lower electromagnetic emission due to optimal
matching of the output signals CANH and CANL
• Improved behaviour in case of an unpowered node
• No standby mode.
This makes the TJA1050 eminently suitable for use in
nodes that are in a power-down situation in partially
powered networks.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
CC
supply voltage 4.75 5.25 V
V
CANH
DC voltage at pin CANH 0 < V
CC
< 5.25 V; no time limit −27 +40 V
V
CANL
DC voltage at pin CANL 0 < V
CC
< 5.25 V; no time limit −27 +40 V
V
i(dif)(bus)
differential bus input voltage dominant 1.5 3 V
t
PD(TXD-RXD)
propagation delay TXD to RXD V
S
= 0 V; see Fig.7 − 250 ns
T
vj
virtual junction temperature −40 +150 °C
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TJA1050T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1
TJA1050U − bare die; die dimensions 1700 × 1280 × 380 µm −
2003 Oct 22 3
Philips Semiconductors Product specification
High speed CAN transceiver TJA1050
BLOCK DIAGRAM
handbook, full pagewidth
30 µA
200
µA
MGS374
TXD
DOMINANT
TIME-OUT
TIMER
1
8
3
RECEIVER
4
REFERENCE
VOLTAGE
5
DRIVER
TEMPERATURE
PROTECTION
2
7
6
V
CC
V
CC
V
CC
CANH
CANL
GND
GND
GND
GND
V
ref
RXD
S
TXD
TJA1050
25
kΩ
25
kΩ
0.5V
CC
Fig.1 Block diagram.
PINNING
SYMBOL PIN DESCRIPTION
TXD 1 transmit data input; reads in data
from the CAN controller to the bus
line drivers
GND 2 ground
V
CC
3 supply voltage
RXD 4 receive data output; reads out
data from the bus lines to the
CAN controller
V
ref
5 reference voltage output
CANL 6 LOW-level CAN bus line
CANH 7 HIGH-level CAN bus line
S 8 select input for high-speed mode
or silent mode
handbook, halfpage
1
2
3
4
8
7
6
5
MGS375
TJA1050T
S
CANHGND
CANL
V
ref
RXD
V
CC
TXD
Fig.2 Pin configuration.
2003 Oct 22 4
Philips Semiconductors Product specification
High speed CAN transceiver TJA1050
FUNCTIONAL DESCRIPTION
The TJA1050 is the interface between the CAN protocol
controller and the physical bus. It is primarily intended for
high-speed automotive applications using baud rates from
60 kbaud up to 1 Mbaud. It provides differential transmit
capability to the bus and differential receiver capability to
the CAN protocol controller. It is fully compatible to the
“ISO 11898”
standard.
A current-limiting circuit protects the transmitter output
stage from damage caused by accidental short-circuit to
either positive or negative supply voltage, although power
dissipation increases during this fault condition.
A thermal protection circuit protects the IC from damage
by switching off the transmitter if the junction temperature
exceeds a value of approximately 165 °C. Because the
transmitter dissipates most of the power, the power
dissipation and temperature of the IC is reduced. All other
IC functions continue to operate. The transmitter off-state
resets when pin TXD goes HIGH. The thermal protection
circuit is particularly needed when a bus line short-circuits.
The pins CANH and CANL are protected from automotive
electrical transients (according to
“ISO 7637”
; see Fig.4).
Control pin S allows two operating modes to be selected:
high-speed mode or silent mode.
The high-speed mode is the normal operating mode and is
selected by connecting pin S to ground. It is the default
mode if pin S is not connected. However, to ensure EMI
performance in applications using only the high-speed
mode, it is recommended that pin S is connected to
ground.
In the silent mode, the transmitter is disabled. All other
IC functions continue to operate. The silent mode is
selected by connecting pin S to V
CC
and can be used to
prevent network communication from being blocked, due
to a CAN controller which is out of control.
A ‘TXD dominant time-out’ timer circuit prevents the bus
lines being driven to a permanent dominant state (blocking
all network communication) if pin TXD is forced
permanently LOW by a hardware and/or software
application failure. The timer is triggered by a negative
edge on pin TXD. If the duration of the LOW-level on
pin TXD exceeds the internal timer value, the transmitter is
disabled, driving the bus into a recessive state. The timer
is reset by a positive edge on pin TXD.
Table 1 Function table of the CAN transceiver; X = don’t care
V
CC
TXD S CANH CANL BUS STATE RXD
4.75 V to 5.25 V LOW LOW (or
floating)
HIGH LOW dominant LOW
4.75 V to 5.25 V X HIGH 0.5V
CC
0.5V
CC
recessive HIGH
4.75 V to 5.25 V HIGH (or
floating)
X 0.5V
CC
0.5V
CC
recessive HIGH
<2 V (not powered) X X 0 V < V
CANH
<V
CC
0V<V
CANL
<V
CC
recessive X
2V<V
CC
< 4.75 V >2 V X 0 V < V
CANH
<V
CC
0V<V
CANL
<V
CC
recessive X
剩余17页未读,继续阅读
qq_41146998
- 粉丝: 0
- 资源: 1
上传资源 快速赚钱
- 我的内容管理 收起
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
会员权益专享
最新资源
- c++校园超市商品信息管理系统课程设计说明书(含源代码) (2).pdf
- 建筑供配电系统相关课件.pptx
- 企业管理规章制度及管理模式.doc
- vb打开摄像头.doc
- 云计算-可信计算中认证协议改进方案.pdf
- [详细完整版]单片机编程4.ppt
- c语言常用算法.pdf
- c++经典程序代码大全.pdf
- 单片机数字时钟资料.doc
- 11项目管理前沿1.0.pptx
- 基于ssm的“魅力”繁峙宣传网站的设计与实现论文.doc
- 智慧交通综合解决方案.pptx
- 建筑防潮设计-PowerPointPresentati.pptx
- SPC统计过程控制程序.pptx
- SPC统计方法基础知识.pptx
- MW全能培训汽轮机调节保安系统PPT教学课件.pptx
资源上传下载、课程学习等过程中有任何疑问或建议,欢迎提出宝贵意见哦~我们会及时处理!
点击此处反馈
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功
评论0