UC5181C Octal Line Receiver FEATURES DESCRIPTION • Meets EIA232E/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 UC5181C is an octal line receiver designed to meet a wide range of digital communications requirements as outlined in EIA standards EIA232E, EIA422A, EIA423A and CCITT V.10, V.11, V.28, X.26, and X.27. The UC5181C is similar to the UC5180C, but without the input filtering. Thus, it covers the entire range of data rates up to 10MBPS. 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—35mA Max • Internal Hysteresis ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA 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 in, 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) UC5181C 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. PARAMETER SYMBOL DC Input Resistance Failsafe Output Voltage RIN VOFS Differential Input High Threshold VTL Differential Input Low Threshold VTL Hysteresis Open Circuit Input Voltage Input Capacitance High Level Output Voltage Low Level Output Voltage VH VIOC CI VOH VOL Short Circuit Output Current Supply current Input Current TEST CONDITIONS 3V ≤ |VIN|≤25V Inputs Open or Shorted Together, or One Input Open and One Grounded 0≥IOUT≤8mAVFAILSAFE=0V 0≥IOUT≥-400µA, VFAILSAFE=VCC VOUT= 0.45V, IOUT = -440µA (See Figure RS = 0 (Note3) 1) RS = 500 (Note 3) VOUT = 0.45V, IOUT = 8 mA (See Figure RS = 0 (Note 3) 1) RS = 500 (Note 3) FS=0V or VCC (See Figure 1) UC5181C MIN MAX 3 7 0.45 2.7 50 -200 -400 45 VID = 1V, IOUT = -440 µA IOS Note 5 ICC IIN 4.75V ≤VCC≤5.25V 20 Other Inputs Grounded VIN = +10V VIH = -10V kΩ V 200 400 -50 mV 140 75 20 mV mV pF V V 2.7 IOUT = 4 mA IOUT = 8 mA VID = -1V (Note 4) UNITS 0.4 0.45 100 35 3.25 mV mA mA mA -3.25 Note 3: RS is a resistor in series with each input. Note 4: Measure after 100 ms warm up (at 0°C). Note 5: Only 1 output may be shorted at a time and then only for a maximum of 1 sec. Note 6: The delays, either tPLH or tPHL, shall not vary from receiver to receiver by more than 35ns. Figure 1. VTL, VTH,VH Definition AC ELECTRICAL CHARACTERISTICS: VCC=5V ±5%. TA=0°C to +70°C, Figure 2 TA=TJ. PARAMETER Propagation Delay–Low to High Propagation Delay–High to Low Acceptable Input frequency SYMBOL tPLH tPHL fA TEST CONDITIONS CL=50pF, VIN= ±500 mV (Note 6) CL=50pF, VIN= ±500 mV (Note 6) Unused Input Grounded, VIN= ±200 mV Figure 2. AC Test Circuit 2 UC5181C UNITS MIN MAX 120 ns 120 ns 5.0 MHz UC5181C APPLICATIONS INFORMATION 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 under fault conditions, while a connection to ground provides a logic ”0". There are two failsafe pins (FS1 and FS2) on the UC5181C 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) driver 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, EIA232E/V.28 / EIA423A/V.10 DATA TRANSMISSION EIA423A/V.10 EIA422A/V.11 DATA TRANSMISSION GENERAL LAYOUT NOTES system (no resistance), currents exceed 80 amps with less than a nanosecond rise time. A transzorb provides two functions, the device capacitance inherently acts as a filter capacitor, and the device clamps the ESD and EOS pulses which would pass through the capacitor and destroy the devices. The recommended transzorb for the UC5180C and the UC5181C is P6KE22CA. The drivers and receivers should be mounted close to the system common ground point, with the ground reference tied to the common point to reduce RFI/EMI. Filter connectors or transzorbs should be used to reduce the RFI/EMI, and protecting the system from static (ESD), and electrical overstress (EOS). A filter connector or capacitor will reduce the ESD pulse by 90% typically. A cable dragged across a carpet and connected to a system can easily be charged to over 25,000 volts. This is a metal to metal contact when the cable is connected to the * Transzorb is a trademark of General Semiconductor Industries. UNITRODE INTEGRATED CIRCUITS 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. 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CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1999, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated