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| a FEATURES Eight Differential Line Receivers in One Package Meets EIA Standard EIA-232E, 423A, 422A and CCITT V.10, V.11, V.28 Single +5 V Supply Differential Inputs Withstand 25 V Internal Hysteresis Low Power CMOS -3.5 mA Supply Current TTL/CMOS Compatible Outputs Available in 28-Pin DIP and PLCC Packages Low Power Replacement for UC5180C/NE5180 APPLICATIONS High Speed Communication Computer I-O Ports Peripherals High Speed Modems Printers Logic Level Translation Octal, RS-232/RS-423 Line Receiver ADM5180 FUNCTIONAL BLOCK DIAGRAM ADM5180 A- A A+ AO B- B B+ BO C- C C+ CO D- D D+ FS1 FS2 E- DO GENERAL DESCRIPTION The ADM5180 is an octal differential line receiver suitable for a wide range of digital communication systems with data rates up to 200 kB/s. Input signals conforming to EIA Standards 232-E, 422A and CCITT V.10, V.11, V.28, X.26, and X.27 are accepted and translated into TTL /CMOS output signal levels. The ADM5180 is a superior upgrade for the UC5180C and the NE5180. It is fabricated on an advanced BiCMOS process, allowing high speed bipolar circuitry to be combined with low power CMOS. This minimizes the power consumption to less than 25 mW. A failsafe function ensures a known output state under a variety of input fault conditions as defined in RS-422A and RS-423A. The failsafe function is controlled by FS1 and FS2. Each controls four receivers. With FS = Low and a fault condition the output is forced low while if FS = High, the output is forced high. The device is available in both 28-pin DIP and 28-lead PLCC packages. E E+ EO F- F F+ FO G- G G+ GO H- H H+ HO Truth Table Differential Input (+) - (-) >200 mV <-200 mV O/C S/C O/C S/C Failsafe Input FS1, FS2 X X L L H H Receiver Logic Output H L L L H H REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 ADM5180-SPECIFICATIONS (V T Parameter POWER REQUIREMENTS VDD IDD INPUTS Input Resistance, RIN Differential Input High Threshold, V TH Differential Input Low Threshold, V TL Hysteresis, VH Open Circuit Input Voltage, V IOC Input Capacitance Input Current, IIN OUTPUTS High Level Output Voltage,V OH Low Level Output Voltage ,V OL Short Circuit O/P Current, IOS FAILSAFE FUNCTION Failsafe Output Voltage, V OFS Min 4.75 3.5 3 50 -200 -400 50 Typ DD MAX = +5 V 5%, Input Common-Mode Range = 7 V. All Specifications TMIN to unless otherwise noted.) Units V mA k mV mV mV mV mV mV pF mA mA V V V mA 3 V |VIN| 25 V RS = 0 , VOUT = 2.7 V, I OUT = -440 A, See Figure 1 RS = 500 , VOUT = 2.7 V, I OUT = -440 A, See Figure 1 RS = 0 , VOUT = 0.45 V, IOUT = 8 mA, See Figure 1 RS = 500 , VOUT = 0.45 V, IOUT = 8 mA, See Figure 1 FS1, FS2 = 0 V or VDD, See Figure 1 Test Conditions/Comments Max 5.25 5 7 200 400 -50 140 60 20 3.25 -3.25 2.7 0.4 0.45 100 VIN = +10 V VIN = -10 V VID = 1.0 V, IOUT = -440 A VID = -1.0 V, IOUT = 4 mA VID = -1.0 V, IOUT = 8 mA, TA = 0C to +70C Note 1 Inputs Open or Shorted Together or One Input Open and One Grounded 0 IOUT 4 mA; FS1, FS2 = 0 V 0 IOUT 8 mA, TA = 0C to +70C; FS1, FS2 = 0 V 0 IOUT -400 A; FS1, FS2 = V DD 0.40 0.45 FS1, FS2 Input Current NOTE 1 Only one output may be shorted at any time. Specifications subject to change without notice. 2.7 -10 +10 V V V A TIMING CHARACTERISTICS (V Parameter Propagation Delay-Low to High Propagation Delay-High to Low Acceptable Input Frequency Rejectable Input Frequency Specifications subject to change without notice. DD = +5 V 5%. All Specifications TMIN to TMAX unless otherwise noted) Typ Max 550 550 0.1 Units ns ns MHz MHz Test Conditions/Comments CL = 50 pF, V IN = 500 mV CL = 50 pF, V IN = 500 mV Unused Input Grounded, V IN = 200 mV Unused Input Grounded, V IN = 500 mW Min 5.5 -2- REV. 0 ADM5180 ABSOLUTE MAXIMUM RATINGS 1 (TA = 25C unless otherwise noted) VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V Common-Mode Input Voltage . . . . . . . . . . . . . . . . . . . . . . +15 V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . +25 V Failsafe Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to VCC Output Short Circuit Duration . . . . . . . . . . . . . . . . . Continuous2 Power Dissipation Plastic DIP . . . . . . . . . . . . . . . . . . . . 1250 mW (Derate at 12.5 mW/C Above +50C) JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . 75C/W Power Dissipation PLCC . . . . . . . . . . . . . . . . . . . . . . . 1000 mW (Derate at 12.5 mW/C Above +50C) JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . +80C/W Operating Temperature Range Commercial ( J Version) . . . . . . . . . . . . . . . . . . . 0C to +70C Industrial (A Version) . . . . . . . . . . . . . . . . . . . -40C to +80C Lead Temperature (Soldering 10 sec) . . . . . . . . . . . . . . . . +300C Vapour Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +215C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220C NOTES 1 This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. 2 Only one output should be shorted at any time. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADM5180 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. W WARNING! ESD SENSITIVE DEVICE VOUT FS = VDD FS = GND (VIN+) - (VIN-) 50% tPLH tPHL OUTPUT 50% VH1 VH2 Figure 3. Timing Waveform VTL1 VTH1 0 VTL2 VTH2 VIN Figure 1. VTL, VTH, VH Definition 8mA ORDERING GUIDE TO OUTPUT PIN 50pF 440A +2.1V Model ADM5180JN ADM5180AN ADM5180JP ADM5180AP Temperature Range 0C to +70C -40C to +85C 0C to +70C -40C to +85C Package Option N-28 N-28 P-28A P-28A Figure 2. Timing Test Load REV. 0 -3- ADM5180 PIN CONFIGURATIONS DIP A- A+ AO B- B+ BO FS1 C- C+ CO 1 2 3 4 5 6 7 8 9 10 28 VDD 27 HO 26 H+ APPLICATIONS INFORMATION FAILSAFE OPERATION The ADM5180 provides a failsafe operating mode to guard against input fault conditions as defined in RS-422A and RS-423A standards. The fault conditions are (1) Driver in power-off condition, (2) Receiver not interconnected with Driver, (3) Opencircuited interconnecting cable, and (4) Short-circuited interconnecting cable. If any 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 failsafe level is programmed using the failsafe (FS) input. There are two failsafe inputs, FS1 and FS2 which each control four receivers. FSI controls receivers A . . . D and FS2 controls receivers E . . . H. A connection to V DD on the failsafe input sets the output high under fault conditions while a connection to GND sets the output low. FS1, FS2 VDD GND Output During Fault Condition High Low 25 H- 24 GO 23 G+ 22 G- TOP VIEW (Not to Scale) 21 FS2 20 FO 19 F+ 18 F- 17 EO ADM5180 D- 11 D+ 12 DO 13 16 E+ 15 E- GND 14 PLCC Input Filtering The ADM5180 contains internal low pass filtering for additional noise rejection. Frequencies above the passband will be rejected. For the specified input (5.5 MHz at 500 mV) the input stage attenuates the signal such that the threshold levels are not reached and therefore no change of state occurs on the output. The filtering is a function of both amplitude and and frequency. As the signal amplitude decreases then the rejected frequency will decrease. VDD AO HO A+ A- B- H+ 25 H- 24 GO 23 G+ 22 G- 21 FS2 20 FO 19 F+ 12 13 14 15 16 17 18 4 B+ BO FS1 C- C+ 5 6 7 8 9 3 2 1 28 27 26 ADM5180 TOP VIEW (Not to Scale) CO 10 D- 11 DO GND E- EO E+ PIN DESCRIPTION Mnemonic VDD GND A+ . . . H+ A- . . . H- A O . . . HO Function Power Supply Input, 5 V 5%. Ground Pin. Must be connected to 0 V. Noninverting Input to Differential Receivers A to H. Inverting Input to Differential Receivers A to H. Receiver Outputs A to H. A through D and FS2 controls receivers E through H. Failsafe Control Inputs. FS1 controls receivers A through D and FS2 control Receiver E through H. FS1, FS2 D+ F- -4- REV. 0 ADM5180 VDD VH VL INPUT +V -V VH 1/8 ADM5170 RS232/RS423A TRANSMISSION + 1/8 ADM5180 VL VOUT - VFAILSAFE TIE TO GND FOR RS232 Figure 4. EIA-232/V.28 Data Transmission VDD +V VH VL INPUT +V RS422A/V.11 LINE DRIVER -V VFAILSAFE -V VH + RS422 TRANSMISSION + 1/8 ADM5180 VL - VOUT - Figure 5. RS-422A/V.11 Data Transmission Typical Performance Characteristics 4.0 VDD = 5V FS = 5V VID = O/C 5.5 3.8 TA = +25C FS = 0V VID = O/C 5.3 IDD - mA 3.6 3.4 VDD - V -20 0 20 40 60 80 5.1 4.9 3.2 4.7 3.0 -40 4.5 3.35 3.40 IDD - mA 3.45 3.50 TEMPERATURE - C Figure 6. Supply Current vs. Temperature Figure 7. Supply Current vs. Supply Voltage REV. 0 -5- ADM5180 500 TpLH 6 400 7 VDD = 5V FS = 0V TA = +25C PROPAGATION DELAY - ns 300 VDD = 5V FS = 0V f = 100kHz TA = +25C Vpp - V (VID = Vpp/2) TpHL 5 4 3 200 CL = 50pF 2 1 100 0 0 1 2 3 4 5 Vpp - V (VID = Vpp/2) 0 0 1 2 3 4 REJECTABLE INPUT FREQUENCY - MHz Figure 8. Propagation Delay vs. Amplitude Figure 10. Rejectable Input Frequency vs. Amplitude 5.0 VDD = 5V TA = +25C 4.8 1000 VDD = 5V FS = 0V VID = 1V TA = +25C 800 4.6 VOL - mV VOH - V 600 4.4 400 4.2 200 4.0 3.8 0 1 2 IOH - mA 3 4 5 0 0 10 IOL - mA 20 30 Figure 9. High Level Output Voltage vs. Output Source Current Figure 11. Low Level Output Voltage vs. Output Sink Current OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 28-Lead Plastic DIP (N Suffix) 28 15 0.580 (14.73) 0.485 (12.32) 1 1.565 (39.70) 1.380 (35.10) 0.250 (6.35) MAX 0.200 (5.05) 0.125 (3.18) 0.022 (0.558) 0.014 (0.356) 0.100 (2.54) BSC 0.625 (15.87) 0.600 (15.24) 0.195 (4.95) 0.125 (3.18) 0.015 (0.381) 0.008 (0.204) 0.070 (1.77) MAX 14 28-Lead Plastic Leaded Chip Carrier (PLCC) (P Suffix) 0.180 (4.57) 0.165 (4.19) PIN 1 0.048 (1.21) 0.042 (1.07) 5 4 PIN 1 IDENTIFIER 26 25 0.021 (0.53) 0.013 (0.33) 0.430 (10.92) 0.390 (9.91) 0.032 (0.81) 0.026 (0.66) 0.060 (1.52) 0.015 (0.38) 0.150 (3.81) MIN 0.050 (1.27) BSC TOP VIEW 11 19 12 0.456 (11.58) 0.450 (11.43)SQ 0.495 (12.57) 0.485 (12.32) SQ 0.110 (2.79) 0.085 (2.16) 18 0.040 (1.01) 0.025 (0.64) SEATING PLANE 0.020 (0.50) R -6- REV. 0 PRINTED IN U.S.A. 0.048 (1.21) 0.042 (1.07) 0.056 (1.42) 0.042 (1.07) 0.025 (0.63) 0.015 (0.38) C1854-7.5-10/93 |
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