UC5180C Octal Line Receiver FEATURES DESCRIPTION • Meets EIA 232E/423A/422A and CCITT V.10,V.11, V.28, X.26, X.27 • Single +5V Supply--TTL Compatible Outputs • Differential Inputs Withstand ± 25V • Low Open Circuit Voltage for Improved Failsafe Characteristic The UC5180C is an octal line receiver designed to meet a wide range of digital communications requirements as outlined in EIA standards EIA232E, EIA423A, EIA422A, and CCITT V.10, V.11, V.28, X.26, and X.27. The UC5180C includes an input noise filter and is intended for applications employing data rates up to 200 KBPS. A failsafe function allows these devices to "fail" to a known state under a wide variety of fault conditions at the inputs. • Reduced Supply Current--35 mA Max • Input Noise Filter • Internal Hysteresis ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Output Short Circuit Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Sec Common Mode Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Differential Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V Failsafe Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VCC PLCC Power Dissipation, TA = 25°C (Note 2). . . . . . . . . . . . . . . . . . . 1000 mW DIP Power Dissipation, TA = 25°C (Note 2) . . . . . . . . . . . . . . . . . . . . 1200 mW Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . . . . . . . . . . . . . -300°C Note 1: All voltages are with respect to ground, pin 14. Currents are positive into, negative out of the specified terminal Note 2: Consult Packaging Section of Databook for thermal limitations and considerations of package. CONNECTION DIAGRAMS DIL-28 (TOP VIEW) 1/94 PLCC-28 (TOP VIEW) UC5180C DC ELECTRICAL CHARACTERISTICS: Unless otherwise stated these specifications apply for TA = 0°C to +70°C, VCC = 5V ± 5%, Input Common Mode Range ± 7V, TA =TJ PARAMETERS SYMBOL TEST CONDITIONS DC Input Resistance Failsafe Output Voltage RIN VOFS Differential Input High Threshold VTH Differential Input Low Threshold VTL Hysteresis Open Circuit Input Voltage Input Capacitance VH VICC CI High Level Output Voltage Low Level Output Voltage VCH VOL VID = 1V, IOUT = - 440µA VID = -1V (Note 3) Short Circuit Output Current Supply Current Input Current IOS Note 4 ICC IIN 4.75V ≤ VCC ≤ 5.25V Other Inputs Grounded UC5180C MIN MAX 3 7 0.45 2.7 3V ≤ | VIN | ≤ 25V Inputs Open or Shorted Together, or One Input Open and One Grounded 0 ≤ IOUT ≤ 8mA, VFAILSAFE = 0V 0 ≥ IOUT ≥ - 400 µA, VFAILSAFE = VCC VOUT = 2.7V, IOUT = 440 µA RS = 0 (Note 2) (See Figure 1) RS = 500 (Note 2) VOUT = 0.45V, IOUT = 440 mA RS = 0 (Note 2) (See Figure 1) RS = 500 (Note 2) FS = 0V or VCC (See Figure 1) 50 -200 -400 50 20 VIN = +10V VIN = -10V kΩ V 200 400 -50 mV 140 75 20 mV mV pF 2.7 IOUT = 4 mA IOUT = 8 mA UNITS mV V V 0.4 0.45 100 mA 35 3.25 mA mA -3.25 Note 2: RS is a resistor in series with each input. Note 3: Measured after 100ms warm up (at 0°C) Note 4: Only 1 output may be shorted at one time and then only for a maximum of 1 sec. Figure 1. VtL, VtH, VH Definition AC ELECTRICAL CHARACTERISTICS: VCC = 5V ± 5%, TA = 0°C to + 70°C, Figure 2, TA = TJ. PARAMETERS Propagation Delay - Low to High Propagation Delay - High to Low Acceptance Input Frequency Rejectable Input Frequency SYMBOL tPLH tPHL fA fR TEST CONDITIONS CL = 50pF, VIN = ± 500mV CL = 50pF, VIN = ± 500mV Unused Input Grounded, VIN = ± 200mV Unused Input Grounded, VIN = ± 500mV 2 UC5180C MIN MAX 550 550 0.1 5.5 UNITS ns ns MHz MHz UC5180C Figure 2. AC Test Circuit APPLICATIONS INFORMATION under fault conditions, while a connection to ground provides a logic "0". There are two failsafe pins (FS1 and FS2) on the UC5180C where each provides common failsafe control for four receivers. Failsafe Operation These devices provide a failsafe operating mode to guard against input fault conditions as defined in EIA422A and EIA423A standards. These fault conditions are (1) drive in power-off condition, (2) receiver not interconnected with driver, (3) open-circuited interconnecting cable, and (4) short-circuited interconnecting cable. If one of these four fault conditions occurs at the inputs of a receiver, then the output of that receiver is driven to a known logic level. The receiver is programmed by connecting the failsafe input to VCC or ground. A connection to VCC provides a logic "1" output Input Filtering (UC5180C) The UC5180C has input filtering for additional noise rejection. This filtering is a function of both signal level and frequency. For the specified input (5.5 MHz at ±500 mV) the input stage filter attenuates the signal such that the output stage threshold levels are not exceeded and no change of state occurs at the output. 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