參數(shù)資料
型號(hào)： PC33975A
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
中文描述： 多交換檢測(cè)接口，具有抑制喚醒和32毫安濕電流
文件頁(yè)數(shù)： 12/32頁(yè)
文件大?。?/td> 641K
代理商： PC33975A
Analog Integrated Circuit Device Data
Freescale Semiconductor
12
33975
FUNCTIONAL DESCRIPTIONS
FUNCTIONAL TERMINAL DESCRIPTION
WAKE INPUT (WAKE)
The
WAKE
terminal is an open-drain output and a wake-up
input. The terminal is designed to control a power supply
Enable terminal. In the Normal mode, the
WAKE
terminal is
low. In the Sleep mode, the
WAKE
terminal is high. The
WAKE
terminal has a pull-up to the internal +5.0 V supply.
In Sleep mode with the
WAKE
terminal high, falling edge of
WAKE
will place the 33975 in Normal mode. In Sleep mode
with VDD applied, the INT terminal must be high for negative
edge of
WAKE
to wake up the device. If VDD is not applied to
the device in Sleep mode,
INT
does not affect
WAKE
operation.
LOAD SUPPLY VOLTAGE (VPWR)
The VPWR terminal is battery input and Power-ON Reset
to the 33975 IC. The VPWR terminal requires external
reverse battery and transient protection. Maximum input
voltage on V
PWR
is 50 V. All wetting, sustain, and internal
logic current is provided from the V
PWR
terminal.
LOGIC VOLTAGE (VDD)
The VDD input terminal is used to determine logic levels
on the microprocessor interface (SPI) terminals. Current from
VDD is used to drive SO output and the pull-up current for
CS
and
INT
terminals. VDD
must be applied for wake-up from
negative edge of
CS
or
INT
.
GROUND (GND)
The GND terminal provides ground for the IC as well as
ground for inputs programmed as switch-to-battery inputs.
PROGRAMMABLE SWITCHES (SP0–SP7)
The 33975 device has 8 switch inputs capable of being
programmed to read switch-to-ground or switch-to-battery
contacts. The input is compared with a 4.0 V reference.
When programmed to be switch-to-battery, voltages greater
than 4.0 V are considered closed. Voltages less than 4.0 V
are considered open. The opposite holds true when inputs
are programmed as switch-to-ground. Programming features
are defined in
Table 6
through
Table 11
in the
Functional
Device Operation
section of this datasheet beginning on
page
14
. Voltages greater than the V
PWR
supply voltage will
source current through the SP inputs to the VPWR terminal.
Transient battery voltages greater than 38/40 V must be
clamped by an external device.
SWITCH-TO-GROUND (SG0–SG13)
The SGn terminals are switch-to-ground inputs only. The
input is compared with a 4.0 V reference. Voltages greater
than 4.0 V are considered open. Voltages less than 4.0 V are
considered closed. Programming features are defined in
Table 6
through
Table 11
in the
Functional Device Operation
section of this datasheet beginning on page
14
. Voltages
greater than the V
PWR
supply voltage will source current
through the SG inputs to the VPWR terminal. Transient
battery voltages greater than 38/40 V must be clamped by an
external device.
相關(guān)PDF資料
PDF描述
PC33975AEK Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
PC33975AR2 Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PC33975AEK 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
PC33975AR2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
PC33981PNA/R2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High-Frequency, High-Current, Self-Protected High-Side Switch (4.0 mз up to 60 kHz)
PC33984CHFKR2 制造商:Freescale Semiconductor 功能描述:
PC33989DW 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:System Basis Chip with High Speed CAN Transceiver
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