công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

MC33390DDR2 bảng dữ liệu(PDF) 11 Page - Freescale Semiconductor, Inc

tên linh kiện MC33390DDR2
Giải thích chi tiết về linh kiện  Class B Serial Transceiver
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC33390DDR2 bảng dữ liệu(HTML) 11 Page - Freescale Semiconductor, Inc

Back Button MC33390DDR2 Datasheet HTML 7Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 8Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 9Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 10Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 11Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 12Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 13Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 14Page - Freescale Semiconductor, Inc MC33390DDR2 Datasheet HTML 15Page - Freescale Semiconductor, Inc  
Zoom Inzoom in Zoom Outzoom out
 11 / 15 page
background image
Analog Integrated Circuit Device Data
Freescale Semiconductor
11
33390
TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
Class B Module Inputs
Transmitter Data from the MCU (Tx)
The Tx input is a push-pull (N-channel/P-channel FETs)
buffer with hysteresis for noise immunity purposes. This pin
is a 5.0 V CMOS logic level input from the MCU following a
true logic protocol. A logic [0] input drives the BUS output to
0 V (via the external pull-down resistor to ground on each
node), while a logic [1] input produces a high voltage at the
BUS output. A logic [0] input level is guaranteed when the Tx
input pin is open-circuited by virtue of an internal 40 k
Ω pull-
down resistor. No external resistor is required for its
operation.
Waveshaping and 4X/Loop
This input is a tristateable input: 0 V = normal
waveshaping, 5.0 V = waveshaping is disabled for 4X
transmitting, and high impedance = loopback mode of
operation. This is a logic level input used to select whether
waveshaping for the Class B output is enabled or disabled. A
logic [0] enables waveshaping, while a logic [1] disables
waveshaping. In the 4X mode, the BUS output rise time is
less than 2.0 µs and the fall time is less than 5.0 µs (owing to
the external RC pull-down to ground). In the loopback
condition, the Tx signal is fed back to the Rx output after
waveshaping without being transmitted onto the BUS. This
mode of operation is useful for system diagnostic purposes.
Class B Module Outputs
Transceiver Output (BUS)
This is the output driver stage that sources current to the
bus. Its output follows the waveshaped waveform input. Its
output voltage is limited to 6.25 V to 8.0 V under normal
battery level conditions. The limited level is controlled by an
internal regulator/clamp circuit. Once the battery voltage
drops below 9.0 V, the regulator/clamp circuit saturates,
causing the bus voltage to track the battery voltage. A 1.5 k
±5% external resistor (as well as any 10.6 k
Ω pull-down
resistors of any secondary nodes) sinks the current to
discharge the capacitors during high-to-low transitions. This
sourcing output is short circuit-protected (60 mA to 170 mA)
against a short to -2.0 V and sinks less than 1.0 mA when
shorted to VBAT. If a short occurs, the overtemperature
shutdown circuit protects the source driver of the device. In
the event battery power is lost to the assembly, the bus
transmitter's output stage will be disabled and the leakage
current from the BUS output will not source or sink more than
100 µA of current. The transceiver will operate with a remote
ground offset of ±2.0 V, but the lower corners of transmission
will not be rounded during this condition.
Receiver Output to the Microcontroller (Rx)
This is a 5.0 V CMOS compatible push-pull output used to
send received data to the microcontroller. It does not require
an external pull-up resistor to be used. The receiver is always
enabled and draws less than 65 µA of current from VBAT. The
receive threshold is dependent on the state of the SLEEP pin.
The receiver circuitry is able to operate with VBAT voltages as
low as 4.25 V and still remains capable of “waking up” the
33390 when remote Class B activity is detected.
When the SLEEP pin is 0 V and message activity occurs
on the bus, the receiver passes the bus message through to
the microcontroller. The 33390 does not automatically “wake
up” from a sleep state when bus activity occurs: the
microcontroller must tell it to do so.
In the Static Electrical Characteristics table, the maximum
voltage for Rx is specified as 4.75 V over an operating range
of -40
°C to 125°C temperature and 7.0 V to 16 V V
BAT. This
maximum Rx voltage is compatible with the minimum VDD
voltage of microcontrollers to prevent the 33390 from
sourcing current to the microcontroller's output.
Switched Ground Output (LOAD)
Normally this output is a saturated switch to ground, which
pulls down the external resistor between the BUS and LOAD
outputs. In the event ground is lost to the assembly, the
LOAD output will bias itself “off” and will not leak more than
100 µA of current out of this pin.
Overtemperature Shutdown
If the BUS output becomes shorted to ground for any
duration, an overtemperature shutdown circuit “latches off”
the output source transistor whenever the die temperature
exceeds 150
°C to 190°C. The output transistor remains
latched off until the Tx input is toggled from a logic [0] to a
logic [1]. The rising edge provides the clearing function,
provided the locally sensed temperature is 10
°C to 15°C
below the latch-off temperature trip temperature.
Waveshaping
Waveshaping is incorporated into the 33390 to minimize
radiated EMI emissions.
Receiver Protocol
The Class B communication scheme uses a variable pulse
width (VPW) protocol. The microcontroller provides the VPW
decoding function. Once the receiver detects a transition on
Rx, it starts an internal counter. The initial “start of frame” bit
is a logic [1] and lasts 200 µs. For subsequent bits, if there is
a bus transition before 96 µs, one logic state is inferred. If
there is a bus transition after 96 µs, the other logic state is
inferred. The “end of data” bit is a logic [0] and lasts 200 µs.
If there is no activity on the bus for 280 µs to 320 µs following
a broadcast message, multiple unit nodes may arbitrate for
control of the next message. During an arbitration, after the


Số phần tương tự - MC33390DDR2

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Motorola, Inc
MC33390D MOTOROLA-MC33390D Datasheet
450Kb / 16P
   Class B Serial Transceiver
MC33390DR2 MOTOROLA-MC33390DR2 Datasheet
450Kb / 16P
   Class B Serial Transceiver
More results

Mô tả tương tự - MC33390DDR2

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Motorola, Inc
MC33390 MOTOROLA-MC33390 Datasheet
450Kb / 16P
   Class B Serial Transceiver
logo
Freescale Semiconductor...
MC33990 FREESCALE-MC33990 Datasheet
455Kb / 16P
   Enhanced Class B Serial Transceiver
MC33990 FREESCALE-MC33990_08 Datasheet
1Mb / 16P
   Enhanced Class B Serial Transceiver
33990 FREESCALE-33990_06 Datasheet
849Kb / 16P
   Enhanced Class B Serial Transceiver
logo
Source Photonics, Inc.
SFU-43-48H-HP-RDE SOURCE-SFU-43-48H-HP-RDE Datasheet
423Kb / 13P
   Class B GPON OLT transceiver
SFU-43-48H-HP-TDE SOURCE-SFU-43-48H-HP-TDE Datasheet
423Kb / 13P
   Class B GPON OLT transceiver
logo
Finisar Corporation.
FTGN3025Q1TAS FINISAR-FTGN3025Q1TAS Datasheet
99Kb / 10P
   GPON ONU Class B Pigtailed RoHS Compliant Transceiver
FTGL2025S1TUS FINISAR-FTGL2025S1TUS Datasheet
91Kb / 10P
   GPON OLT Class B Pigtailed RoHS Compliant Transceiver
logo
Ningbo Tianbo Ganglian ...
HJQ-15F-1 TIANBO-HJQ-15F-1 Datasheet
1Mb / 3P
   Class B/F available
logo
ORION FANS
OAB400 ORIONFANS-OAB400 Datasheet
113Kb / 1P
   Centrifugal Fan - Class B
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com