参数资料
型号: MC9S08QA2CFQE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: MICROCONTROLLER, DSO8
封装: 4 X 4 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, DFN-8
文件页数: 28/32页
文件大小: 2368K
代理商: MC9S08QA2CFQE
Electrical Characteristics
MC9S08QA4 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor
5
3
Electrical Characteristics
3.1
Introduction
This chapter contains electrical and timing specifications for the MC9S08QA4 series of microcontrollers available at the time
of publication.
3.2
Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only, and functional operation at the maxima is not guaranteed. Stress beyond the
limits specified in Table 2 may affect device reliability or cause permanent damage to the device. For functional operating
conditions, refer to the remaining tables in this section.
This device contains circuitry protecting against damage due to high static voltage or electrical fields; however, it is advised
that normal precautions be taken to avoid application of any voltages higher than maximum-rated voltages to this
high-impedance circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (for
instance, either VSS or VDD) or the programmable pullup resistor associated with the pin is enabled.
3.3
Thermal Characteristics
This section provides information about operating temperature range, power dissipation, and package thermal resistance. Power
dissipation on I/O pins is usually small compared to the power dissipation in on-chip logic and voltage regulator circuits, and
it is user-determined rather than being controlled by the MCU design. To take PI/O into account in power calculations, determine
the difference between actual pin voltage and VSS or VDD and multiply by the pin current for each I/O pin. Except in cases of
unusually high pin current (heavy loads), the difference between pin voltage and VSS or VDD will be very small.
Table 2. Absolute Maximum Ratings
Rating
Symbol
Value
Unit
Supply voltage
VDD
–0.3 to 3.8
V
Maximum current into VDD
IDD
120
mA
Digital input voltage
VIn
–0.3 to VDD +0.3
V
Instantaneous maximum current
Single pin limit (applies to all port pins)1, 2, 3
1 Input must be current limited to the value specified. To determine the value of the required
current-limiting resistor, calculate resistance values for positive (VDD) and negative (VSS) clamp
voltages, then use the larger of the two resistance values.
2 All functional non-supply pins are internally clamped to V
SS and VDD.
3 Power supply must maintain regulation within operating V
DD range during instantaneous and
operating maximum current conditions. If positive injection current (VIn > VDD) is greater than
IDD, the injection current may flow out of VDD and could result in external power supply going
out of regulation. Ensure external VDD load will shunt current greater than maximum injection
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if
no system clock is present, or if the clock rate is very low (which would reduce overall power
consumption).
ID
±25
mA
Storage temperature range
Tstg
–55 to 150
°C
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相关代理商/技术参数
参数描述
MC9S08QA2CFQE 制造商:Freescale Semiconductor 功能描述:IC 8BIT MCU HCS08 20MHZ DFN-8
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