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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST3243C датащи(PDF) 1 Page - STMicroelectronics |
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ST3243C датащи(HTML) 1 Page - STMicroelectronics |
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1 / 22 page  November 2007 Rev 8 1/22 22 ST3243B ST3243C 3 to 5.5 V, 400 Kbps, RS-232 transceiver with auto-power-down Features ■ 1 µA supply current achieved when in auto- power-down ■ 250 kbps minimum guaranteed data rate ■ Guaranteed 6 V/µs slew rate range ■ Guaranteed mouse drive ability ■ 0.1 µF external capacitors ■ Meet EIA/TIA-232 specifications down to 3 V ■ Available in SSOP-28 and TSSOP28 Description The ST3243 device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. The device meets the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability. The receiver R2 is always active to implement a wake-up feature for serial port. The ST3243 has a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0 V to 5.5 V supply with a dual charge pump. The device is guaranteed to run at data rates of 250 kbps while maintaining RS-232 output levels. The Auto-power-down feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduced to 1 mA. Disconnecting the serial port or turning off the peripheral drives causes the auto-power-down condition to occur. Auto-power-down can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With Auto- power-down enabled, the device is activated automatically when a valid signal is applied to any receiver input. Typical application are in notebook, sub- notebook, palmtop computers, battery-powered equipment, hand-held equipment, peripherals and printers. SSOP TSSOP Table 1. Device summary Order code Temperature range Package Packaging ST3243CPR 0 to 70 °C SSOP-28 (tape and reel) 1350 parts per reel ST3243BTR -40 to 85 °C TSSOP28 (tape and reel) 2500 parts per reel www.st.com |
Аналогичный номер детали - ST3243C |
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Аналогичное описание - ST3243C |
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