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| TECHNICAL DATA Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers General Description The KKX485 is low-power transceivers for RS-485 and RS422 communication. IC contains one driver and one receiver. The driver slew rates of the KKX485 is not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw between 120A and 500A 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 KKX485 is designed for half-duplex applications. KKX485 ORDERING INFORMATION KKX485N Plastic KKX485D SOIC Features Low Quiescent Current: 300A -7V to +12V Common-Mode Input Voltage Range Three-State Outputs 30ns Propagation Delays, 5ns Skew Full-Duplex and Half-Duplex Versions Available Operate from a Single 5V Supply Allows up to 32 Transceivers on the Bus Data rate: 2,5 Mbps Current-Limiting and Thermal Shutdown for Driver Overload Protection 1 KKX485 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) 12V Control Input Voltage -0.5V to (VCC + 0.5V) Driver Input Voltage (DI) -0.5V to (VCC+ 0.5V) Driver Output Voltage (A, B) -8V to +12.5V Receiver Input Voltage (A, B) -8V to +12.5V Receiver Output Voltage (RO) -0.5V to (VCC+0.5V) Continuous Power Dissipation (TA= +70C) 8-Pin Plastic DIP (derate 9.09mW/C above +70C) 727mW 8-Pin SOP (derate 5.88mW/C above +70C) 471mW Operating Temperature Ranges 0C to +70C Storage Temperature Range -65C to +160C Lead Temperature (soldering, 10sec) +300C DC ELECTRICAL CHARACTERISTICS (VCC = 5V 5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TY P MAX UNITS Differential Driver Output (no load) Differential Driver Output (with load) Change in Magnitude of Driver Differential Output Voltage for Complementary Output States Driver Common-Mode Output Voltage Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States Input High Voltage Input Low Voltage Input Current Input Current (A, B) Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage Three-State (high impedance) Output Current at Receiver Receiver Input Resistance VOD1 VOD2 VOD R = 50 (RS-422) R = 27 (RS-485), Figure 4 R = 27 or 50, Figure 4 2 1.5 5 V V 5 0.2 V VOC VOD R = 27 or 50, Figure 4 R = 27 or 50, Figure 4 3 0.2 V V VIH VIL IIN1 IIN2 VTH VTH VOH VOL IOZR RIN DE, DI, RE DE, DI, RE DE, DI, RE DE = 0V; VCC = 0V or 5.25V, -7V VCM 12V VIN = 12V VIN = -7V 2.0 0.8 2 1.0 -0.8 0.2 70 3.5 0.4 1 V V A mA V mV V V A k -0.2 VCM = 0V IO = -4mA, VID = 200mV IO = 4mA, VID = -200mV 0.4V VO 2.4V -7V VCM 12V 2 KKX485 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 5V 5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TY P MAX UNITS No-Load Supply Current (Note 3) Driver Short-Circuit Current, ICC DE = VCC RE = 0V or VCC DE = 0V IOSD1 -7V VO 12V (Note 4) 35 500 300 900 500 A 250 mA VO = High Driver Short-Circuit Current, IOSD2 VO = Low Receiver Short-Circuit Current IOSR -7V VO 12V (Note 4) 0V VO VCC 35 7 250 95 mA mA SWITCHING CHARACTERISTICS (VCC = 5V 5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Driver Input to Output Driver Output Skew to Output Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High | tPLH - tPHL | Differential Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable Time from Low Receiver Disable Time from High Maximum Data Rate tPLH tPHL tSKEW tZH tZL tLZ tHZ tSKD tZL tZH tLZ tHZ fMAX RDIFF = 54 CL1 = CL2 = 100pF RDIFF = 54, CL1 = CL2 = 100pF CL= 100pF, S2 closed CL= 100pF, S1 closed CL= 15pF, S1 closed CL= 15pF, S2 closed RDIFF = 54 CL1 = CL2 = 100pF CRL = 15pF, S1 closed CRL = 15pF, S2 closed CRL = 15pF, S1 closed CRL = 15pF, S2 closed 10 10 30 30 5 40 40 40 40 13 20 20 20 20 60 60 10 70 70 70 70 ns ns ns ns ns ns ns ns ns ns ns Mbps 50 50 50 50 2.5 3 KKX485 4 KKX485 Operation timing diagrams of ILX 485 Table of ILX 485 operation Transmitting RE X X 0 1 Inputs DE 1 1 0 0 DI 1 0 X X Outputs X Z Y 0 1 1 0 Z Z Z Z RE 0 0 0 1 Receiving Inputs DE A-B 0 +0.2V 0 -0.2V 0 open 0 X Outputs RO 1 0 1 Z X-don't care Z-high impedance 5 KKX485 N SUFFIX PLASTIC DIP (MS - 001BA) A 8 5 B 1 4 Dimension, mm Symbol A B MIN 8.51 6.1 MAX 10.16 7.11 5.33 0.36 1.14 2.54 7.62 0 2.92 7.62 0.2 0.38 10 3.81 8.26 0.36 0.56 1.78 F L C D C -T- SEATING N G D 0.25 (0.010) M T K PLANE F G M H J H J K L M N NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. D SUFFIX SOIC (MS - 012AA) Dimension, mm 5 A 8 Symbol A B P MIN 4.8 3.8 1.35 0.33 0.4 1.27 5.72 0 0.1 0.19 5.8 0.25 MAX 5 4 1.75 0.51 1.27 H B C 1 G 4 C R x 45 D F -TD 0.25 (0.010) M T C M K SEATING PLANE G J F M H J K M P R 8 0.25 0.25 6.2 0.5 NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side. 6 |
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