MC33390D Freescale Semiconductor, MC33390D Datasheet - Page 12

• Manufacturer Part Number: MC33390D
• Description: IC TRANSCEIVER SER LINK 8-SOIC
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC33390D

• Number Of Drivers/receivers: 1/1
• Voltage - Supply: 9 V ~ 16 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Protocol: -
• Other names: Q1163428B

“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
device level is that all pins of the 33390, with the exception of
BUS and LOAD, see a very low impedance to V
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 µA of leakage current
12
33390
TYPICAL APPLICATIONS
The definition of a loss of assembly ground condition at the
The LOAD pin of the device has an internal transistor
BAT
.
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
impedance to V
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
Loss of Assembly Battery Connection
device level is that the V
impedance to V
between these pins and ground.
The definition of a loss of assembly battery condition at the
BAT
BAT
BAT
. During this condition the BUS pin is
, but there is some undefined impedance
; all other pins will exhibit a low
Analog Integrated Circuit Device Data
BAT
pin of the 33390 sees an infinite
Table
Freescale Semiconductor
5, page 10.