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参数资料
型号： MCR705JP7CDWE
厂商： Freescale Semiconductor
文件页数： 74/164页
文件大小： 0K
描述： MCU 8BIT 224B RAM 28-SOIC
标准包装： 26
系列： HC05
核心处理器： HC05
芯体尺寸： 8-位
速度： 2.1MHz
连通性： SIO
外围设备： POR，温度传感器，WDT
输入/输出数： 22
程序存储器容量： 6KB（6K x 8）
程序存储器类型： OTP
RAM 容量： 224 x 8
电压 - 电源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
数据转换器： A/D 4x12b
振荡器型： 内部
工作温度： -40°C ~ 85°C
封装/外壳： 28-SOIC（0.295"，7.50mm 宽）
包装： 管件
VDD and VSS Pins
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
17
1.5 VDD and VSS Pins
Power is supplied to the MCU through VDD and VSS. VDD is the positive supply, and VSS is ground. The
MCU operates from a single power supply.
Very fast signal transitions occur on the MCU pins. The short rise and fall times place very high
short-duration current demands on the power supply. To prevent noise problems, special care should be
taken to provide good power supply bypassing at the MCU by using bypass capacitors with good
high-frequency characteristics that are positioned as close to the MCU as possible.
1.6 OSC1 and OSC2 Pins
The OSC1 and OSC2 pins are the connections for the external pin oscillator (EPO). The OSC1 and OSC2
pins can accept these sets of components:
A crystal as shown in Figure 1-3 (a)
A ceramic resonator as shown in Figure 1-3 (a)
An external resistor as shown in Figure 1-3 (b)
An external clock signal as shown in Figure 1-3 (c)
The selection of the crystal/ceramic resonator or RC oscillator configuration is done by product part
number selection as described in Chapter 17 Ordering Information.
The frequency, fOSC, of the EPO or external clock source is divided by two to produce the internal
operating frequency, fOP.
Figure 1-3. EPO Oscillator Connections
1.6.1 Crystal Oscillator
The circuit in Figure 1-3 (a) shows a typical oscillator circuit for an AT-cut, parallel resonant crystal. The
crystal manufacturer’s recommendations should be followed, as the crystal parameters determine the
external component values required to provide maximum stability and reliable startup. The load
capacitance values used in the oscillator circuit design should include all stray capacitances. The crystal
and components should be mounted as close as possible to the pins for startup stabilization and to
minimize output distortion. An internal startup resistor of approximately 2 M
can be provided between
OSC1 and OSC2 for the crystal type oscillator by use of the OSCRES bit in the MOR.
MCU
(a) Crystal or
Ceramic Resonator
Connections
OSC1
OSC2
2 M
R
UNCONNECTED
EXTERNAL CLOCK
(b) RC Oscillator
Connections
(c) External Clock
Source Connection
OSC1
OSC2
MCU
OSC1
OSC2
MCU
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MCR706AT4 功能描述:SCR 400V 4A RoHS:否 制造商:STMicroelectronics 最大转折电流 IBO:480 A 额定重复关闭状态电压 VDRM:600 V 关闭状态漏泄电流（在 VDRM IDRM 下）:5 uA 开启状态 RMS 电流 (It RMS): 正向电压下降:1.6 V 栅触发电压 (Vgt):1.3 V 最大栅极峰值反向电压:5 V 栅触发电流 (Igt):35 mA 保持电流（Ih 最大值）:75 mA 安装风格:Through Hole 封装 / 箱体:TO-220 封装:Tube
MCR706AT4G 功能描述:SCR THY 4A 400V SCR RoHS:否 制造商:STMicroelectronics 最大转折电流 IBO:480 A 额定重复关闭状态电压 VDRM:600 V 关闭状态漏泄电流（在 VDRM IDRM 下）:5 uA 开启状态 RMS 电流 (It RMS): 正向电压下降:1.6 V 栅触发电压 (Vgt):1.3 V 最大栅极峰值反向电压:5 V 栅触发电流 (Igt):35 mA 保持电流（Ih 最大值）:75 mA 安装风格:Through Hole 封装 / 箱体:TO-220 封装:Tube
MCR707A 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Silicon Controlled Rectifiers
MCR708A 功能描述:SCR 600V 4A RoHS:否 制造商:STMicroelectronics 最大转折电流 IBO:480 A 额定重复关闭状态电压 VDRM:600 V 关闭状态漏泄电流（在 VDRM IDRM 下）:5 uA 开启状态 RMS 电流 (It RMS): 正向电压下降:1.6 V 栅触发电压 (Vgt):1.3 V 最大栅极峰值反向电压:5 V 栅触发电流 (Igt):35 mA 保持电流（Ih 最大值）:75 mA 安装风格:Through Hole 封装 / 箱体:TO-220 封装:Tube
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