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參數(shù)資料
| 型號： | MCZ33990EF |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Enhanced Class B Serial Transceiver |
| 中文描述： | 增強(qiáng)B級串行收發(fā)器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 257K |
| 代理商： | MCZ33990EF |
Analog Integrated Circuit Device Data
Freescale Semiconductor
13
33990
TYPICAL APPLICATIONS
FUNCTIONAL PIN DESCRIPTION
transition before 96
μ
s, one logic state is inferred. If there is a
bus transition after 96
μ
s, the other logic state is inferred. The
“end of data” bit is a logic [0] and lasts 200
μ
s. If there is no
activity on the bus for 280
μ
s to 320
μ
s following a broadcast
message, multiple unit nodes may arbitrate for control of the
next message. During an arbitration, after the “start of frame”
bit has been transmitted, the secondary node transmitting the
most consecutive logic [0] bits will be granted sole
transmission access to the bus for that message.
Loss of Assembly Ground Connection
The definition of a loss of assembly ground condition at the
device level is that all pins of the 33990, with the exception of
BUS and LOAD, see a very low impedance to V
BAT
.
The LOAD pin of the device has an internal transistor
switch connected to it that is normally saturated to ground.
This pulls the LOAD-side of the external resistor (tied from
BUS to LOAD) to ground under normal conditions. The LOAD
pin switch is essentially that of an “upside down” FET, which
is normally biased “on” so long as module ground is present
and biased “off” when loss-of-ground occurs. When a loss of
assembly ground occurs, the load transistor switch is self-
biased “off”, allowing no more than 100
μ
A of leakage current
to flow in the LOAD pin. During such a loss of assembly
ground condition, the BUS and LOAD pins exhibit a high
impedance to V
BAT
; all other pins will exhibit a low impedance
to V
BAT
. During this condition the BUS pin is prevented from
sourcing any current or loading the bus, which would cause a
corruption of any data being transmitted on the bus. While a
particular assembly is experiencing a loss of ground, all other
assembly nodes are permitted to function normally. It should
be noted that with other nodes existing on the bus, the bus
will always have some minimum maximum impedance to
ground as shown in
Table 6
, page
11
.
Loss of Assembly Battery Connection
The definition of a loss of assembly battery condition at the
device level is that the V
BAT
pin of the 33990 sees an infinite
impedance to V
BAT
, but there is some undefined impedance
between these pins and ground.
Figure 14. Typical Application
BUS
+VBAT
SLEEP
TX
RX
4X/LOOP
GND
LOAD
Primary
Node
MCU
V
BAT
Secondary
Nodes
33990
10.6
k
470pF
47
μ
H
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MCZ33990EF | 制造商:Freescale Semiconductor 功能描述:TRANCEIVER J-1850 CLASS B 8SOIC |
| MCZ33990EF/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Enhanced Class B Serial Transceiver |
| MCZ33990EFR2 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CLASS B SERIAL TRANS RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33991EG | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 GAUGE DRIVER IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MCZ33991EGR2 | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 GAUGE DRIVER IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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