MAX3490EESA+T

MAX3490EESA+T FEATURES ： ➢ 3.0V~5.5V Supply, Full-duplex ➢ 1/8 Unit Load, Allow Up to 256 Transceivers on the Bus ➢ Driver Short-Circuit Output Protection ➢ Strong Anti-Noise Ability ➢ Integrated Transient Voltage Suppression Function ➢ The Data Transmission Rate Up to 14Mbps in SOP-8 SOP-8 Electric Noise Environment ➢ ESD Protection for RS-485 I/O Pins ±15kV, Human Body Model DESCRIPTION is a 3.0V~5.5V powered,full-duplex, low power dissipation RS-485 transceiver fully meeting the requirements of RS-485/RS-422 standard. MAX3490E contains one driver and one receiver, both can transmit signals independently. The MAX3490E has a 1/8-unit-load. It allows up to 256 transceivers on the bus and error-free data transmission up to 14Mbps. MAX3490E has a working voltage range of 3.0V~5.5V, with the functions of Current-Limiting Protection, Over-voltage Protection, Control Port Hot Plug Input, etc. MAX3490E has excellent ESD release capability, and HBM reaches ±15kV. MAX3490E PIN CONFIGURATION VCC R A RO B DI Z GND D Y Figure 1 MAX3490E Pin Configuration www.tokmas.com MAX3490EESA+T LIMITING VALUES PARAMETER SYMBOL VALUE UNIT Supply voltage VCC +7 V Driver Input Voltage DI -0.3~VCC+0.3 V Receiver Input Voltage A, B -8~13 V Receiver Output Voltage RO -0.3~VCC+0.3 V Operating Temperature Ranges TA -40~125 ℃ Storage Temperature Range Tstg -60~150 ℃ 300 ℃ SOP8 400 mW DIP8 700 mW Lead Temperature Continuous Power Dissipation The maximum limit parameters mean that exceeding these values may cause irreversible damage to the device. Under these conditions, it is not conducive to the normal operation of the device. The continuous operation of the device at the maximum allowable rating may affect the reliability of the device. The reference point for all voltages is ground. PINNING PIN SYMBOL 1 VCC DESCRIPTION Positive Supply: 3.0V≤ VCC ≤5.5V 2 RO Receiver Output. If A-B≥+200mV, RO will be high; If A-B≥-200mV, RO will be low. 3 DI Driver Input. A low on DI forces output Y low and output Z high. a high on DI forces output Y high and output Z low. 4 GND 5 Y Non-inverting Driver Output 6 Z Inverting Driver Output 7 B Inverting Receiver Input 8 A Non-inverting Receiver Input Ground www.tokmas.com MAX3490EESA+T DRIVER DC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL CONDITION MIN TYP MAX Differential Driver Output (No load) VOD1 Differential Driver Output VOD2 Change in Magnitude of Driver Differential Output Voltage (NOTE1) ∆VOD Figure 2, RL = 27 Ω 0.2 V Driver Common-Mode Output Voltage VOC Figure 2, RL = 27 Ω 3 V Change in Magnitude of Common-Mode Output Voltage (NOTE1) ∆VOC Figure 2, RL = 27 Ω 0.2 V Input High Voltage VIH DI Input Low Voltage VIL DI Logic Input Current IIN1 DI Output short-circuit current, short-circuit to high IOSD1 Output short-circuit current, short-circuit to low IOSD2 5 UNIT V Figure 2, RL = 27 Ω 1.5 VCC Figure 2, RL = 50 Ω 2 VCC V 2.0 V 0.8 V -2 2 μA short-circuit to 0V~12V 35 250 mA short-circuit to 7V~0V -250 -35 mA (Unless otherwise noted, VCC=3.3V±10%, Temp=TMIN~TMAX, typical values are at VCC=+3.3V, Temp=25℃) NOTE1: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state. RECEIVER DC ELECTRICAL CHARACTERISTICS PARAMETER Input current (A, B) SYMBOL IIN2 CONDITION MIN VCC=0 or 3.3V VIN=12 V VCC=0 or 3.3V VIN=-7 V -100 www.tokmas.com TYP MAX UNIT 125 μA μA MAX3490EESA+T PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT Positive input threshold voltage VIT+ -7V≤VCM≤12V +200 mV Reverse input threshold voltage VIT- -7V≤VCM≤12V -200 Input hysteresis voltage Vhys -7V≤VCM≤12V 10 Receiver Output High Voltage VOH IOUT=−4mA， VID=+200 mV VCC-1.5 Receiver Output Low Voltage VOL IOUT=+4mA， VID=-200 mV 0.4 V Three-State Output Current at Receiver IOZR 0.4 V