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LTC487CSW

製品説明
仕様・特性

LTC487 Quad Low Power RS485 Driver FEATURES DESCRIPTION n The LTC®487 is a low power differential bus/line driver designed for multipoint data transmission standard RS485 applications with extended common-mode range (– 7V to 12V). It also meets RS422 requirements. n n n n n n n n Very Low Power: ICC = 110μA Typ Designed for RS485 or RS422 Applications Single 5V Supply – 7V to 12V Bus Common-Mode Range Permits ±7V GND Difference Between Devices on the Bus Thermal Shutdown Protection Power-Up/Down Glitch-Free Driver Outputs Permit Live Insertion/Removal of Package Driver Maintains High Impedance in Three-State or with the Power Off 28ns Typical Driver Propagation Delays with 5ns Skew Pin Compatible with the SN75174, DS96174, μA96174, and DS96F174 The CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage. The driver features three-state outputs, with the driver outputs maintaining high impedance over the entire common-mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. Both AC and DC specifications are guaranteed from 0°C to 70°C (Commercial), –40°C to 85°C (Industrial) and over the 4.75V to 5.25V supply voltage range. APPLICATIONS n n Low Power RS485/RS422 Drivers Level Translator L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION RS485 Cable Length Specification* 10k EN 12 4 4 2 DI 1 2 120Ω DRIVER 3 120Ω 4000 FT BELDEN 9841 RECEIVER 1 3 RO 1/4 LTC489 CABLE LENGTH (FT) EN 12 1k 100 1/4 LTC487 LTC487 TA01 10 10k 100k 1M 2.5M 10M DATA RATE (bps) LTC487 TA09 * APPLIES FOR 24 GAUGE, POLYETHYLENE DIELECTRIC TWISTED PAIR 487fb 1

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