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    參數(shù)資料
    型號: SCC68681C1A44,518
    廠商: NXP Semiconductors
    文件頁數(shù): 17/29頁
    文件大?。?/td> 0K
    描述: IC DUART 44PLCC
    標(biāo)準(zhǔn)包裝: 500
    特點: 故障啟動位檢測
    通道數(shù): 2,DUART
    FIFO's: 3 位
    電源電壓: 5V
    帶自動流量控制功能:
    帶故障啟動位檢測功能:
    帶CMOS:
    安裝類型: 表面貼裝
    封裝/外殼: 44-LCC(J 形引線)
    供應(yīng)商設(shè)備封裝: 44-PLCC
    包裝: 帶卷 (TR)
    其它名稱: 935274497518
    SCC68681C1A44-T
    SCC68681C1A44-T-ND
    Philips Semiconductors
    Product data
    SCC68681
    Dual asynchronous receiver/transmitter (DUART)
    2004 Apr 06
    24
    X1/CLK
    CTCLK
    RxC
    TxC
    tCLK
    tCTC
    tRx
    tTx
    tCLK
    tCTC
    tRx
    tTx
    +5 V
    R1
    1 k
    X1
    X2
    C1 = C2 = 24 pF FOR CL = 20 pF
    X1
    X2
    3.6864 MHz
    3 pF
    4 pF
    50 TO
    150 k
    TO INTERNAL CLOCK DRIVERS
    SCC68681
    NOTE:
    C1 AND C2 SHOULD BE BASED ON MANUFACTURER’S SPECIFICATION. PARASITIC CAPACITANCE SHOULD BE
    INCLUDED WITH C1 AND C2. R1 IS ONLY REQUIRED IF U1 WILL NOT DRIVE TO X1 INPUT LEVELS
    TYPICAL CRYSTAL SPECIFICATION
    FREQUENCY:
    2 – 4 MHz
    LOAD CAPACITANCE (CL):
    12 – 32 pF
    TYPE OF OPERATION:
    PARALLEL RESONANT, FUNDAMENTAL MODE
    NC
    SD00725
    RESISTOR REQUIRED
    WHEN U1 IS A TTL DEVICE
    U1
    Figure 8. Clock timing
    NOTES:
    1. INTRN or OP3 – OP7 when used as interrupt outputs.
    2. The test for open drain outputs is intended to guarantee switching of the output transistor. Measurement of this response is referenced from the mid point of the switching signal, VM, to
    a point 0.5 volts above VOL. This point represents noise margin that assures true switching has occurred. Beyond this level, the effects of external circuitry and test environment are
    pronounced and can greatly affect the resultant measurement.
    VM
    VOL +0.5V
    VOL
    CSN
    (READ OR
    WRITE)
    INTERRUPT1
    OUTPUT
    tIR
    SD00116
    Figure 9. Interrupt timing
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    SCC68681C1N40112 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
    SCC68681E1A44 功能描述:UART 接口集成電路 RPLCMNT FOR SCN68681 RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel