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    參數(shù)資料
    型號(hào): ADM241LJRSZ-REEL
    廠商: Analog Devices Inc
    文件頁(yè)數(shù): 1/20頁(yè)
    文件大?。?/td> 0K
    描述: IC TXRX RS-232 4:5 5V LP 28SSOP
    標(biāo)準(zhǔn)包裝: 1,500
    類(lèi)型: 收發(fā)器
    驅(qū)動(dòng)器/接收器數(shù): 4/5
    規(guī)程: RS232
    電源電壓: 4.75 V ~ 5.25 V
    安裝類(lèi)型: 表面貼裝
    封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
    供應(yīng)商設(shè)備封裝: 28-SSOP
    包裝: 帶卷 (TR)
    5 V-Powered
    CMOS RS-232 Drivers/Receivers
    ADM231L–ADM234L/ADM236L–ADM241L
    Rev. C
    Information furnished by Analog Devices is believed to be accurate and reliable.
    However, no responsibility is assumed by Analog Devices for its use, nor for any
    infringements of patents or other rights of third parties that may result from its use.
    Specifications subject to change without notice. No license is granted by implication
    or otherwise under any patent or patent rights of Analog Devices. Trademarks and
    registered trademarks are the property of their respective owners.
    One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
    Tel: 781.329.4700
    Fax: 781.461.3113
    2005 Analog Devices, Inc. All rights reserved.
    FEATURES
    Single 5 V power supply
    Meets all EIA-232-E and V.28 specifications
    120 kbps data rate
    On-board dc-to-dc converters
    ±9 V output swing with 5 V supply
    Small 1 F capacitors
    Low power shutdown ≤1 A
    ±30 V receiver input levels
    Latch-up free
    APPLICATIONS
    Computers
    Peripherals
    Modems
    Printers
    Instruments
    GENERAL DESCRIPTION
    The ADM2xx family of line drivers/receivers is intended for all
    EIA-232-E and V.28 communications interfaces, especially in
    applications in which 12 V is not available. The ADM236L and
    ADM241L feature a low power shutdown mode that reduces
    power dissipation to less than 5 W, making them ideally suited
    for battery-powered equipment. The ADM233L does not
    require any external components and is particularly useful in
    applications where printed circuit board space is critical.
    All members of the ADM2xxL family, except the ADM231L and
    ADM239L, include two internal charge pump voltage converters
    that allow operation from a single 5 V supply. These parts convert
    the 5 V input power to the ±10 V required for RS-232 output
    ADM236L TYPICAL OPERATING CIRCUIT
    T1IN
    T1OUT
    T2IN
    T2OUT
    RS-232
    OUTPUTS
    T3IN
    T4IN
    R1OUT
    R1IN
    R2OUT
    R2IN
    TTL/CMOS
    OUTPUTS
    R3IN
    R3OUT
    T3OUT
    T4OUT
    1
    F
    +6.3V
    1
    F
    +16V
    C1+
    C1–
    C2–
    C2+
    V–
    1
    F
    +16V
    +10V TO –10V
    VOLTAGE
    INVERTER
    1
    F
    +6.3V
    1
    F
    +6.3V
    +5V INPUT
    VCC
    +5V TO +10V
    VOLTAGE
    DOUBLER
    T1
    T2
    T3
    T4
    R1
    R2
    R3
    V+
    SD
    ADM236L
    GND
    00070-
    0-
    015
    TTL/CMOS
    INPUTS1
    RS-232
    INPUTS2
    1INTERNAL 400k
    PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
    2INTERNAL 5k
    PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
    EN
    Figure 1.
    levels. The ADM231L and ADM239L are designed to operate
    from 5 V and 12 V supplies. An internal +12 V to 12 V charge
    pump voltage converter generates the 12 V supply.
    The ADM2xxL is an enhanced upgrade to the AD2xx family. It
    features lower power consumption, faster slew rate, and the
    ability to operate with smaller (1 F) capacitors.
    Table 1. Selection Table
    Part
    Number
    Power Supply Voltage
    No. of RS-232
    Drivers
    No. of RS-232
    Receivers
    External
    Capacitors
    Low Power
    Shutdown (SD)
    TTL
    Three-State EN
    No. of
    Pins
    ADM231L
    5 V and 7.5 V to 13.2 V
    2
    No
    14
    ADM232L
    5 V
    2
    4
    No
    16
    ADM233L
    5 V
    2
    None
    No
    20
    ADM234L
    5 V
    4
    0
    4
    No
    16
    ADM236L
    5 V
    4
    3
    4
    Yes
    24
    ADM237L
    5 V
    5
    3
    4
    No
    24
    ADM238L
    5 V
    4
    No
    24
    ADM239L
    5 V and 7.5 V to 13.2 V
    3
    5
    2
    No
    Yes
    24
    ADM241L
    5 V
    4
    5
    4
    Yes
    28
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