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ADM234LJN データシート(PDF) 1 Page - Analog Devices |
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ADM234LJN データシート(HTML) 1 Page - Analog Devices |
1 / 20 page 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 www.analog.com 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 µF capacitors Low power shutdown ≤1 µA ±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 µW, 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 µF +6.3V 1 µF +16V C1+ C1– C2– C2+ V– 1 µF +16V +10V TO –10V VOLTAGE INVERTER 1 µF +6.3V 1 µF +6.3V +5V INPUT VCC +5V TO +10V VOLTAGE DOUBLER T1 T2 T3 T4 R1 R2 R3 V+ SD ADM236L GND TTL/CMOS INPUTS1 RS-232 INPUTS2 1INTERNAL 400k Ω PULL-UP RESISTOR ON EACH TTL/CMOS INPUT. 2INTERNAL 5k Ω 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 µF) 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 2 2 No No 14 ADM232L 5 V 2 2 4 No No 16 ADM233L 5 V 2 2 None No No 20 ADM234L 5 V 4 0 4 No No 16 ADM236L 5 V 4 3 4 Yes Yes 24 ADM237L 5 V 5 3 4 No No 24 ADM238L 5 V 4 4 4 No 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 Yes 28 |
同様の部品番号 - ADM234LJN |
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同様の説明 - ADM234LJN |
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