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參數(shù)資料
| 型號(hào)： | MC33661R2 |
| 廠商： | Motorola, Inc. |
| 英文描述： | LIN Enhanced Physical Interface |
| 中文描述： | 林增強(qiáng)型物理接口 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 377K |
| 代理商： | MC33661R2 |
33661
16
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
APPLICATIONS
Motorola Device Compatibility: 33661 and 33399
The two Motorola devices are terminal-to-terminal
compatible.
Table 2
summarizes the differences between the
two devices.
Table 2. Compatibility Comparison
Parameter
33661
33399
Terminal Out and
Package
8-terminal SOICN.
8-terminal SOICN.
Baud Rate Operation
2 baud rate operations: from 1.0 to 10 kbps and from 1.0 to
20 kbps.
1 baud rate operation from 1.0 to 20 kbps.
INH Output
Capable of:
Controlling an external switchable voltage regulator.
Driving a bus master termination resistor.
Capable of controlling an external switchable voltage
regulator.
WAKE Terminal
Identical to 33399.
Identical to 33661.
TXD, RXD, EN
5.0 V and 3.3 V compatible.
5.0 V compatible only.
LIN Bus Termination
In normal, slow, and fast mode, 30 k
pullup. In sleep mode
and bus short-to-ground, 20
μ
A pullup.
30 k
pullup in normal and sleep modes.
Sleep Current
Typical 8.0
μ
A.
Typical 20
μ
A, maximum 50
μ
A.
Mode
Normal, slow, fast, and sleep modes.
Normal and sleep modes.
Normal Mode
Selected by TXD HIGH, then EN HIGH at device wake-up.
Operation up to 20 kbps.
Selected by TXD high and EN high at device wake-up.
Operation up to 20 kbps.
Slow Mode
Selected by TXD LOW, then EN HIGH at device wake-up.
Operation up to 10 kbps.
N/A
Fast Mode
Selected by sequence at TXD and EN. Operation at baud
rate >100 kbps.
N/A
Sleep Mode
and Bus Wake-Up
Recessive-to-dominant transition, followed by a dominant
state of more than 70
μ
s, followed by a dominant-to-
recessive transition.
Dominant level, 50
μ
s duration.
Slew Rate
Three slew rates: Normal (20 kbps), Slow (10 kbps), and
Fast (>100 kbps). Normal and slow mode selected by EN
and TXD terminal sequence at device wake-up. The
sequence to enter normal mode is the same for both the
33399 and 33661.
One slew rate: 20 kbps.
Wake-Up from
Internal Node Activity
(LOW to HIGH
transition of EN)
If TXD is set HIGH and then EN is switched HIGH, the
33661 wakes up and the Normal Mode is selected. In this
setup sequence, there is a direct compatibility between
33399 and 33661.
TXD must be set HIGH prior to setting EN HIGH in order to
avoid having the device send a dominant level on the bus at
wake-up.
Radiated Emission
The level of radiated emissions measured in identical
configurations is lower for the 33661 compared to the 33399
in the normal mode, allowing operation up to 20 kbps. If the
33661 device is set to the slow mode, allowing operation up
to 10 kbps, the radiated emission level is significantly
reduced.
The level of radiated emissions measured in identical
configurations is higher for the 33399 compared to the
33661 in the normal mode.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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