MMA8451Q 데이터 시트보기 (PDF) - Freescale Semiconductor
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MMA8451Q Datasheet PDF : 52 Pages
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Table 1. Pin Description
Pin # Pin Name
Description
1
VDDIO Internal Power Supply (1.62V - 3.6V)
2
BYP Bypass capacitor (0.1 μF)
3
NC
Leave open. Do not connect
4
SCL
I2C Serial Clock
5
GND Connect to Ground
6
SDA
I2C Serial Data
7
SA0
I2C Least Significant Bit of the Device I2C Address
8
NC
Internally not connected (can be GND or VDD)
9
INT2 Inertial Interrupt 2
10
GND Connect to Ground
11
INT1 Inertial Interrupt 1
12
GND Connect to Ground
13
NC
Internally not connected (can be GND or VDD)
14
VDD Power Supply (1.95V - 3.6V)
15
NC
Internally not connected (can be GND or VDD)
16
NC
Internally not connected (can be GND or VDD)
Pin Status
Input
Input
Open
Open Drain
Input
Open Drain
Input
Input
Output
Input
Output
Input
Input
Input
Input
Input
The device power is supplied through VDD line. Power supply decoupling capacitors (100 nF ceramic plus 4.7 µF bulk, or a
single 4.7 µF ceramic) should be placed as near as possible to the pins 1 and 14 of the device.
The control signals SCL, SDA, and SA0 are not tolerant of voltages more than VDDIO + 0.3V. If VDDIO is removed, the control
signals SCL, SDA, and SA0 will clamp any logic signals with their internal ESD protection diodes.
The functions, the threshold and the timing of the two interrupt pins (INT1 and INT2) are user programmable through the I2C
interface. The SDA and SCL I2C connections are open drain and therefore require a pullup resistor as shown in the application
diagram in Figure 4.
1.1 Soldering Information
The QFN package is compliant with the RoHS standard. Please refer to AN4077.
Sensors
Freescale Semiconductor, Inc.
MMA8451Q
5
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