欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MC34058FTA
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: 5-V Battery-Backup Supervisors for RAM Retention 8-MSOP -40 to 85
中文描述: LINE TRANSCEIVER, PQFP48
封裝: PLASTIC, TQFP-48
文件頁數: 8/12頁
文件大小: 237K
代理商: MC34058FTA
MC34058 MC34059
Figure 10. Typical EIA/TIA–485 Application
8
MOTOROLA ANALOG IC DEVICE DATA
RT
120
RT
120
EIA/TIA–422 specifications require the ability to drive at
least 10 receivers of input impedance of greater than or equal
to 4.0 K
plus the 100
termination resistor. This protocol
was intended for unidirectional transmission. EIA/TIA–485 is
capable of bidirectional transmission by allowing multiple
drivers and receivers on the same twisted pair segment. The
loading of the twisted pair segment can be up to 32 Unit
Loads (U.L.) plus the two 120
terminating resistors. The
U.L. definition is shown in Figure 11.
Figure 11. TIA/EIA–485 Unit Load Definition
–0.8 mA
Ii
Vi
+12 V
+5.0 V
–7.0 V
–3.0 V
Calculating Power Dissipation for the
MC34058/9 Hex–Transceiver.
The operational temperature range is listed as 0
°
C to 70
°
C
to satisfy both EIA/TIA–485 and EIA/TIA–422 specifications.
However, a lower ambient temperature may be required
depending on the specific board layout and/or application.
Using a first order approximation for heat transfer, the
maximum power which may be dissipated by the package is
determined by (see Appendix A for more details);
TJmax– TA
PDmax
θ
ja
[1]
where:
θ
ja = package thermal resistance (see Appendix A)
TJmax = Maximum Junction Temperature. Since the
thermal shutdown feature has a trip point of 150
°
C
±
20
°
,
TJmax is selected to be +130
°
C.
TA = Ambient Operating Temperature.
The power generated within the package is then;
PD
VCC– VOH1
· IOH1
VOL1
· IOL1
..
[2]
(each_driver)..
VCC– VOH6
· IOH6
VOL6
· IOL6
VCC· ICCQ
As indicated in the equation, the part of Equation 2
consisting of IOH , VOH , IOL and VOL must be calculated for
each of the drivers and summed for the total power
dissipation estimate. The last term can be considered the
quiescent power required to keep the IC operational and is
measured with the drivers idle and unloaded. The VOH and
VOL terms can be determined from the output current
versus output voltage curves which provide driver output
characteristics.
Example 1 estimates thermal performance based on
current requirements.
相關PDF資料
PDF描述
MC34059 5-V Battery-Backup Supervisors for RAM Retention 8-MSOP -40 to 85
MC34059FTA HEX EIA-485 TRANSCEIVER with THREE-STATE OUTPUTS
MC3405P Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC3405P Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC34065P-L HIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLERS
相關代理商/技術參數
參數描述
MC34059 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HEX EIA-485 TRANSCEIVER with THREE-STATE OUTPUTS
MC34059FTA 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HEX EIA-485 TRANSCEIVER with THREE-STATE OUTPUTS
MC3405P 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:DUAL OPERATIONAL AMPLIFIER / DUAL VOLTAGE COMPARATOR
MC3406 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:N-Channel 30-V (D-S) MOSFET High performance trench technology
MC34060 制造商:未知廠家 制造商全稱:未知廠家 功能描述:精密開關模式脈寬調制控制電路
主站蜘蛛池模板: 长白| 轮台县| 西贡区| 深圳市| 乐清市| 友谊县| 营山县| 桦甸市| 廉江市| 德安县| 泸州市| 清苑县| 江源县| 黑龙江省| 丰原市| 乐业县| 兰州市| 饶平县| 田林县| 宜昌市| 蓝山县| 永修县| 彭山县| 琼中| 应城市| 泽州县| 嘉禾县| 中卫市| 浠水县| 阿图什市| 特克斯县| 左云县| 邹城市| 浦城县| 什邡市| 柏乡县| 天等县| 涿鹿县| 桃园县| 安达市| 波密县|