MAX485ESA

JSM-MAX485 Low-Power Slew-Rate-Limited RS-485/RS-422 Transceivers General Description Features Low Quiescent Current: 300µA ｏｎ -7V to +12V Common-Mode Input Voltage Range ｉｃ Three-State Outputs 30ns Propagation Delays, 5ns Skew ｄｕ ｃｔ These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. All parts operate from a single 5V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. The JSM-MAX485 is designed for half-duplex applications. ｏｒ The JSM-MAX485 is low-power transceivers for RS-485 and RS422 communication. IC contains one driver and one receiver. The driver slew rates of the JSM-MAX485 is not limited, allowing them to transmit up to 2.5Mbps. Full-Duplex and Half-Duplex Versions Available ｅｍ Operate from a Single 5V Supply Data rate: 2,5 Mbps 　Ｓ Allows up to 32 Transceivers on the Bus Pinning ＪＳ ＭＩ ＣＲ Ｏ Current-Limiting and Thermal Shutdown for Driver Overload Protection JSM-MAX485_ REV 1.0_EN ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第１／５页 JSM-MAX485 Low-Power Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) 12V Control Input Voltage -0.5V to (VCC + 0.5V) Continuous Power Dissipation (TA= +70°C) Driver Input Voltage (DI) -0.5V to (VCC+ 0.5V) 8-Pin SO (derate 5.88mW/°C above +70°C) 471mW Driver Output Voltage (A, B) -8V to +12.5V Operating Temperature Ranges0°C to +70°C Receiver Input Voltage (A, B) -8V to +12.5V Storage Temperature Range -65°C to +160°C Receiver Output Voltage (RO) -0.5V to (VCC+0.5V) Lead Temperature (soldering, 10sec) +300°C ｏｒ DC ELECTRICAL CHARACTERISTICS SYMBOL Differential Driver Output (no load) VOD1 Differential Driver Output (with load) VOD2 Change in Magnitude of Driver Differential Output Voltage for Complementary Output States ΔVOD Driver Common-Mode Output Voltage VOC Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States ΔVOD Input High Voltage VIH DE, DI, RE Input Low Voltage VIL DE, DI, RE 0.8 V Input Current IIN1 DE, DI, RE ±2 µA Input Current (A, B) IIN2 DE = 0V; VCC = 0V or 5.25V, Receiver Differential Threshold Voltage VTH -7V  VCM  12V Receiver Input Hysteresis ΔVTH VCM = 0V Receiver Output High Voltage VOH IO = -4mA, VID = 200mV Receiver Output Low Voltage VOL IO = 4mA, VID = -200mV 0.4 V Three-State (high impedance) Output Current at Receiver IOZR 0.4V  VO  2.4V ±1 µA Receiver Input Resistance RIN -7V  VCM  12V MIN ｄｕ R = 50Ω (RS-422) TYP MAX UNITS 5 V 2 1.5 5 ｏｎ R = 27Ω (RS-485), Figure 4 ｉｃ R = 27Ω or 50Ω, Figure 4 ｅｍ R = 27Ω or 50Ω, Figure 4 　Ｓ ＣＲ Ｏ ＪＳ ＭＩ CONDITIONS ｃｔ PARAMETER R = 27Ω or 50Ω, Figure 4 0.2 V 3 V 0.2 V 2.0 V VIN = 12V 1.0 VIN = -7V -0.8 -0.2 0.2 70 mA V mV 3.5 12 V V kΩ (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) JSM-MAX485_ REV 1.0_EN ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第２／５页 JSM-MAX485 Low-Power Slew-Rate-Limited RS-485/RS-422 Transceivers DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS DE = VCC No-Load Supply Current ICC RE = 0V or (Note 3) VCC DE = 0V 300 500 µA IOSD1 -7V  VO 12V (Note 4) 35 250 mA IOSD2 -7V  VO 12V (Note 4) 35 250 mA IOSR 0V  VO  VCC ｏｒ Driver Short-Circuit Current, MIN TYP MAX UNITS 500 900 95 mA VO = High Driver Short-Circuit Current, VO = Low Receiver Short-Circuit Current ｃｔ SWITCHING CHARACTERISTICS 7 (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) CONDITIONS MIN tPLH RDIFF = 54Ω, tPHL CL1 = CL2 = 100pF Driver Output Skew to Output tSKEW Driver Enable to Output High ｄｕ SYMBOL TYP MAX UNITS 30 60 10 30 60 RDIFF = 54Ω, CL1 = CL2 = 100pF 5 10 ns tZH CL= 100pF, S2 closed 40 70 ns Driver Enable to Output Low tZL CL= 100pF, S1 closed 40 70 ns Driver Disable Time from Low tLZ CL= 15pF, S1 closed 40 70 ns Driver Disable Time from High tHZ CL= 15pF, S2 closed 40 70 ns | tPLH - tPHL | Differential tSKD RDIFF = 54Ω, 13 　Ｓ Receiver Skew ｅｍ Driver Input to Output ｏｎ 10 ｉｃ PARAMETER ns ns CL1 = CL2 = 100pF tZL CRL = 15pF, S1 closed 20 50 ns Receiver Enable to Output High tZH CRL = 15pF, S2 closed 20 50 ns Receiver Disable from Low Receiver Disable from High Maximum Data Rate Time tLZ CRL = 15pF, S1 closed 20 50 ns Time tHZ CRL = 15pF, S2 closed 20 50 ns ＪＳ ＭＩ ＣＲ Ｏ Receiver Enable to Output Low JSM-MAX485_ REV 1.0_EN fMAX 2.5 ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ Mbps 第３／５页 JSM-MAX485 Low-Power Slew-Rate-Limited RS-485/RS-422 Transceivers ＪＳ ＭＩ ＣＲ Ｏ 　Ｓ ｅｍ ｉｃ ｏｎ ｄｕ ｃｔ ｏｒ Operation timing diagrams of JSM-MAX485. Transmission Inputs RE DE X 1 X 1 0 0 1 0 X-don’t care Z-high resistance JSM-MAX485_ REV 1.0_EN Table of JSM-MAX485 operation. DI 1 0 X X Z 0 1 Z Z Outputs Y 1 0 Z Z ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ Receipt RE 0 0 0 1 Inputs DE 0 0 0 0 A-B +0.2V -0.2V open X Outputs RO 1 0 1 Z 第４／５页 JSM-MAX485 Low-Power Slew-Rate-Limited RS-485/RS-422 Transceivers Symbol 　Ｓ ｅｍ ｉｃ ｏｎ ｄｕ ｃｔ ｏｒ PackageDimension Dimensions in Millimeters Dimensions in Inches Max Min Max 1.350 1.750 0.053 0.069 0.100 0.250 0.004 0.010 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 A A1 ＪＳ ＭＩ A2 ＣＲ Ｏ Min e 1.270 (BSC) 0.050 (BSC) L 0.400 1.270 0.016 0.050 θ 0º 8º 0º 8º JSM-MAX485_ REV 1.0_EN ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第５／５页