<small id="dnlbu"></small>
  • <nobr id="dnlbu"><noframes id="dnlbu"><nobr id="dnlbu"></nobr><thead id="dnlbu"><ul id="dnlbu"></ul></thead>
    <nobr id="dnlbu"><small id="dnlbu"></small></nobr>
    <kbd id="dnlbu"></kbd>
    <dl id="dnlbu"><dfn id="dnlbu"><table id="dnlbu"></table></dfn></dl>
    <table id="dnlbu"><dfn id="dnlbu"><li id="dnlbu"></li></dfn></table>
  • 參數(shù)資料
    型號(hào): MC7448HX1420LC
    廠商: Freescale Semiconductor
    文件頁(yè)數(shù): 48/60頁(yè)
    文件大?。?/td> 0K
    描述: IC MPU RISC 32BIT 360-FCCBGA
    標(biāo)準(zhǔn)包裝: 44
    系列: MPC74xx
    處理器類型: 32-位 MPC74xx PowerPC
    速度: 1.42GHz
    電壓: 1.2V
    安裝類型: 表面貼裝
    封裝/外殼: 360-BCBGA,F(xiàn)CCBGA
    供應(yīng)商設(shè)備封裝: 360-FCCBGA(25x25)
    包裝: 托盤
    MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4
    52
    Freescale Semiconductor
    System Design Information
    9.7.4
    Temperature Diode
    The MPC7448 has a temperature diode on the microprocessor that can be used in conjunction with other
    system temperature monitoring devices (such as Analog Devices, ADT7461). These devices use the
    negative temperature coefficient of a diode operated at a constant current to determine the temperature of
    the microprocessor and its environment. For proper operation, the monitoring device used should
    auto-calibrate the device by canceling out the VBE variation of each MPC7448’s internal diode.
    The following are the specifications of the MPC7448 on-board temperature diode:
    Vf > 0.40 V
    Vf < 0.90 V
    Operating range 2–300
    μA
    Diode leakage < 10 nA @ 125
    °C
    Ideality factor over 5–150
    μA at 60°C: n = 1.0275 ± 0.9%
    Ideality factor is defined as the deviation from the ideal diode equation:
    Another useful equation is:
    Where:
    Ifw = Forward current
    Is = Saturation current
    Vd = Voltage at diode
    Vf = Voltage forward biased
    VH = Diode voltage while IH is flowing
    VL = Diode voltage while IL is flowing
    IH = Larger diode bias current
    IL = Smaller diode bias current
    q = Charge of electron (1.6 x 10 –19 C)
    n = Ideality factor (normally 1.0)
    K = Boltzman’s constant (1.38 x 10–23 Joules/K)
    T = Temperature (Kelvins)
    The ratio of IH to IL is usually selected to be 10:1. The previous equation simplifies to the following:
    Ifw = Is e
    – 1
    qVf
    ___
    nKT
    VH – VL = n
    ln
    – 1
    KT
    __
    q
    IH
    __
    IL
    VH – VL = 1.986 × 10
    –4 × nT
    相關(guān)PDF資料
    PDF描述
    UPD44647366AF5-E25-FQ1 SRAM QDRII 72MBIT 165-PBGA
    MC7448HX1400NC IC MPU RISC 32BIT 360-FCCBGA
    UPD44647186AF5-E25-FQ1-A SRAM QDRII 72MBIT 165-PBGA
    UPD44647186AF5-E25-FQ1 SRAM QDRII 72MBIT 165-PBGA
    UPD44646363AF5-E25-FQ1-A SRAM DDRII 72MBIT 165-PBGA
    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    MC7448HX1420LD 功能描述:微處理器 - MPU APL8 RV2.2.1 1.2V 105C RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
    MC7448HX1600LC 功能描述:IC MPU RISC 32BIT 360-FCCBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC74xx 標(biāo)準(zhǔn)包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點(diǎn):- 速度:1.2GHz 電壓:1.1V 安裝類型:表面貼裝 封裝/外殼:783-BBGA,F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:783-FCPBGA(29x29) 包裝:托盤
    MC7448HX1600LD 功能描述:微處理器 - MPU APL8 RV2.2.1 1.25V 105C RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
    MC7448HX1700LC 功能描述:IC MPU RISC 32BIT 360-FCCBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC74xx 標(biāo)準(zhǔn)包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點(diǎn):- 速度:1.2GHz 電壓:1.1V 安裝類型:表面貼裝 封裝/外殼:783-BBGA,F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:783-FCPBGA(29x29) 包裝:托盤
    MC7448HX1700LD 功能描述:微處理器 - MPU APL8 RV2.2.1 1.3V 105C RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324