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MC33975 데이터시트 PDF




Freescale Semiconductor에서 제조한 전자 부품 MC33975은 전자 산업 및 응용 분야에서
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부품번호 MC33975 기능
기능 Multiple Switch Detection Interface
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MC33975 데이터시트, 핀배열, 회로
www.DFaretaeSshceeatl4eUS.ceommiconductor
Technical Data
Document order number: MC33975
Rev 4.0, 08/2005
Multiple Switch Detection
Interface with Suppressed
Wake-Up and 32mA Wetting
Current
Freescale offers multiple Switch Detection Interface Devices. The
33975 Multiple Switch Detection Interface with Suppressed Wake-Up
is designed to detect the closing and opening of up to 22 switch
contacts. The switch status, either open or closed, is transferred to the
microprocessor unit (MCU) through a serial peripheral interface (SPI).
The device also features a 22-to-1 analog multiplexer for reading
inputs as analog.
33975
33975A
MULTIPLE SWITCH
DETECTION INTERFACE WITH
SUPPRESSED WAKE-UP
The 33975 device has two modes of operation, Normal and Sleep.
Normal mode allows programming of the device and supplies switch
contacts with pull-up or pull-down current as it monitors switch change
of state. The Sleep mode provides low quiescent current, which makes
the 33975 ideal for automotive and industrial products requiring low
sleep state currents.
Improvements are a programmable interrupt timer for Sleep mode
that can be disabled, switch detection currents of 32 mA and 4.0 mA
for switch-to-ground inputs, and an interrupt bit that can be reset.
EK Suffix (Pb-Free)
98ARL10543D
32-TERMINAL SOICW EP
Features
ORDERING INFORMATION
• Designed to Operate 5.5 V VPWR 28 V
• Switch Input Voltage Range -14 V to VPWR
• Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI
Protocol
• Selectable Wake-Up on Change of State
Device
MC33975EK/R2
PC33975AEK/R2
Temperature
Range (TA)
-40°C to 125°C
Package
32 SOICW-EP
• Selectable Wetting Current (32 mA or 4.0 mA for switch-to-ground
inputs)
• 8 Programmable Inputs (Switches to Battery or Ground)
• 14 Switch-to-Ground Inputs
• VPWR Standby Current 100 µA Typical, VDD Standby Current 20 µA Typical
• Pb-free 32-terminal suffix EK
VDD
VBAT
VBAT
VBAT
33975
SP0 VPWR
SP1
VDD
SP7
SG0
SG1
SG12
WAKE
SI
SCLK
CS
SO
INT
AMUX
VDD
Power Supply
LVI
Enable
Watchdog
Reset
MCU
MOSI
SCLK
CS
MISO
INT
AN0
SG13
GND
Figure 1. 33975 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2005. All rights reserved.




MC33975 pdf, 반도체, 판매, 대치품
TERMINAL CONNECTIONS
TERMINAL CONNECTIONS
GND
SI
SCLK
CS
SP0
SP1
SP2
SP3
SG0
SG1
SG2
SG3
SG4
SG5
SG6
VPWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 SO
31 VDD
30 AMUX
29 INT
28 SP7
27 SP6
26 SP5
25 SP4
24 SG7
23 SG8
22 SG9
21 SG10
20 SG11
19 SG12
18 SG13
17 WAKE
Figure 3. 33975 Terminal Connections
Table 2. Terminal Definitions
A functional description of each terminal can be found in the Functional Terminal Description section on page 11.
Terminal
Terminal
Name
Formal Name
Description
1 GND
2 SI
3 SCLK
4 CS
Ground
SPI Slave In
Serial Clock
Chip Select
Ground for logic, analog, and switch-to-battery inputs.
SPI control data input terminal from MCU to 33975.
SPI control clock input terminal.
SPI control chip select input terminal from MCU to 33975. Logic [0] allows data
to be transferred in.
5–8
25 – 28
9 – 15,
18 – 24
16
SPn
SGn
VPWR
Programmable Switches 0–3
Programmable Switches 4–7
Switch-to-Ground Inputs 0–6
Switch-to-Ground Inputs 13–7
Battery Input
Programmable switch-to-battery or switch-to-ground input terminals.
Switch-to-ground input terminals.
Battery supply input terminal. This terminal requires external reverse battery
protection.
17 WAKE
Wake-Up
Open drain wake-up output is designed to control a power supply enable
terminal.
29 INT
Interrupt
Open-drain output to MCU is used to indicate input switch change of state.
30
AMUX
Analog Multiplex Output
Analog multiplex output.
31
VDD
Voltage Drain Supply
3.3/5.0 V supply sets SPI communication level for SO driver.
32 SO
SPI Slave Out
Provides digital data from 33975 to MCU.
33975
4
Analog Integrated Circuit Device Data
Freescale Semiconductor

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MC33975 전자부품, 판매, 대치품
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Characteristics noted under conditions of 3.0 V VDD 5.5 V, 8.0 V VPWR 28V, -40°C TC 125°C unless otherwise
noted. Where applicable, typical values reflect the parameter’s approximate average value with VPWR = 13 V, TA = 25°C.
Characteristic
Symbol
Min
Typ
Max Unit
SWITCH INPUT (CONTINUED)
Input Offset Current when Selected as Analog
Input Offset Voltage when Selected as Analog
V(SP&SGinputs) to AMUX Output
Ioffset
-2.0 1.4
2.0 µA
Voffset
mV
-10 2.5
10
Analog Operational Amplifier Output Voltage
Sink 250 µA
VOL mV
– 10 30
Analog Operational Amplifier Output Voltage
Source 250 µA
Switch Detection Threshold
Temperature Monitor (8), (9)
VOH
Vth
TLIM
VDD - 0.1
3.70
155
4.0
V
4.3 V
185 °C
Temperature Monitor Hysteresis (9)
TLIM(hys)
5.0
10
15 °C
Notes
8. Thermal shutdown of 16 mA and 32 mA pull-up and pull-down current sources only. 4.0 mA and 2.0 mA current source/sink and all
other functions remain active.
9. This parameter is guaranteed by design; however it is not production tested.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33975
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