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ADM222 Fiches technique(PDF) 1 Page - Analog Devices |
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ADM222 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 9 page One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a High Speed, +5 V, 0.1 µF CMOS RS-232 Drivers/Receivers FEATURES 200 kB/s Transmission Rate Small (0.1 µF) Charge Pump Capacitors Single 5 V Power Supply Meets All EIA-232-E and V.28 Specifications Two Drivers and Two Receivers On-Board DC-DC Converters ±9 V Output Swing with +5 V Supply ±30 V Receiver Input Levels Pin Compatible with MAX222/MAX232A/MAX242 APPLICATIONS Computers Peripherals Modems Printers Instruments ORDERING GUIDE Model Temperature Range Package Option ADM222AN –40 °C to +85°C N-18 ADM222AR –40 °C to +85°C R-18W ADM232AAN –40 °C to +85°C N-16 ADM232AARN –40 °C to +85°C R-16N ADM232AARW –40 °C to +85°C R-16W ADM242AN –40 °C to +85°C N-18 ADM242AR –40 °C to +85°C R-18W * INTERNAL 400k Ω PULL-UP RESISTOR ON EACH TTL/MOS INPUT ** INTERNAL 5k Ω PULL-DOWN RESISTOR ON EACH RS-232 INPUT VCC +5V TO +10V VOLTAGE DOUBLER +5V TO –10V VOLTAGE INVERTER C1+ C1– V+ V– C2+ C2– T1 ADM2xx T2 R1 R2 0.1µF 0.1µF 0.1µF GND TTL/CMOS OUTPUTS R1OUT R2OUT T1OUT T2OUT R1IN R2IN T1IN T2IN TTL/CMOS INPUTS * RS-232 OUTPUTS RS-232 INPUTS ** 0.1µF +5V INPUT 0.1µF EN SHDN (ADM242) (ADM222, ADM242) ADM222/ADM232A/ADM242* FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The ADM222, ADM232A, ADM242 are a family of high speed RS-232 line drivers/receivers offering transmission rates up to 200 kB/s. Operating from a single +5 V power supply, a highly efficient on-chip charge pump using small (0.1 µF) external capacitors allows RS-232 bipolar levels to be developed. Two RS-232 drivers and two RS-232 receivers are provided on each device. The devices are fabricated on BiCMOS, an advanced mixed technology process which combines low power CMOS with high speed bipolar circuitry. This allows for transmission rates up to 200 kB/s yet minimizes the quiescent power supply current to under 5 mA. The ADM232A is a pin-compatible, high speed upgrade for the AD232 and for the ADM232L. It is available in 16-pin DIP and in both narrow and wide surface mount (SOIC) packages. The ADM222 contains an additional shutdown (SHDN) func- tion which may be used to disable the device thereby reducing the supply current to 0.1 µA. During shutdown, all transmit/ receive functions are disabled. The ADM222 is available in 18-pin DIP and in a wide surface mount (SOIC) package. The ADM242 combines both shutdown (SHDN) and enable (EN) functions. The shutdown function reduces the supply curent to 0.1 mA. During shutdown, the transmitters are disabled but the receivers continue to operate normally. The enable function allows the receiver outputs to be disabled thereby facilitating sharing a common bus. The ADM242 is available in 18-pin DIP and in a wide surface mount (SOIC) package. *Protected by U.S. Patent No. 5,237,209. |
Numéro de pièce similaire - ADM222 |
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Description similaire - ADM222 |
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