a Octal, RS-232/RS-423 Line Driver ADM5170 FEATURES FUNCTIONAL BLOCK DIAGRAM Eight Single Ended Line Drivers in One Package Meets EIA Standard RS-232E, RS-423A and ADM5170 CCITT V.10/X.26 Resistor Programmable Slew Rate A A A I O Wide Supply Voltage Range Low Power CMOS 3-State Outputs B B B I O TTL/CMOS Compatible Inputs Output Short Circuit Protection Available in 28-Lead PLCC C C C I O Low Power Replacement for UC5170C APPLICATIONS High Speed Communication D D D I O Computer I-O Ports Peripherals High Speed Modems Printers E E E O I Logic Level Translation F F F I O G G G I O GENERAL DESCRIPTION The ADM5170 is an octal line driver suitable for digital communi- cation systems with data rates up to 116 kB/s. Input TTL or H H H I O CMOS signal levels are inverted and translated into either EIA RS-232E or RS-423A signal levels depending on the status of the EN Mode Select inputs MS+ and MS. With both Mode Select inputs MS+ RS-232/RS-423 at GND, RS-423 operation is selected while with MS+ connected MODE SELECT MS to V and MS connected to V , RS-232 operation is selected. DD SS SLEW RATE SRA The output slew rates may be controlled using an external resistor CONTROL connected between the SRA (Slew Rate Adjust) pin and GND. Resistor values between 2 k and 10 k may be selected giving a slew rate which can be adjusted from 10 V/s to 2.2 V/s. This adjustment of the slew rate allows tailoring of the output character- Truth Table istics to suit the interface cable being used. The outputs may be disabled using the EN (Enable Input). This Inputs Outputs 1 feature permits sharing of a common output line. EN Data EIA RS-232E RS-423A The ADM5170 is fabricated on an advanced CMOS process 00 (V 3 V) 5 V to 6 V DD featuring low power consumption. In the disabled state the power 01 (V 3 V) 5 V to 6 V SS consumption reduces from 500 mW to 40 mW. The ADM5170 is 1 X High Z High Z available in a 28-lead PLCC package. 1 Minimum Output Level REV. A Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A which may result from its use. No license is granted by implication or Tel: 781.329.4700 19932016 Analog Devices, Inc. All rights reserved. otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com( V = +10 V 10%, V = 10 V 10% V, MS+ = MS = 0 V, R = DD SS SRA ADM5170SPECIFICATIONS 10 k. All Specifications T to T unless otherwise noted.) MIN MAX Parameter Min Typ Max Units Test Conditions/Comments POWER REQUIREMENTS V Range 9 15 V DD V Range 9 15 V SS I (Disabled) 2 4 mA EN = High, DD I (Enabled) 25 36 mA R = , EN = 0 V DD L I (Disabled) 2 4 mA EN = High SS I (Enabled) 23 36 mA R = , EN = 0 V SS L DIGITAL INPUTS Input Logic Threshold High, V 2.0 V INH Input Logic Threshold Low, V 0.8 V INL Input Clamp Voltage, V 1.1 1.8 V I = 15 mA INK IN Input High Level Current, I 1 AV = 2.4 V INH INH Input Low Level Current, I 1 AV = 0.4 V INL INL OUTPUTS RS-423A Outputs EN = 0.8 V, MS+ = MS = 0 V High Level Output Voltage 5.0 5.3 6.0 V R = , V = 0.8 V L IN 5.0 5.3 6.0 V R = 3 k, V = 0.8 V L IN 4.5 5.2 6.0 V R = 450 , V = 0.8 V L IN Low Level Output Voltage 5.0 5.3 6.0 V R = , V = 2.0 V L IN 5.0 5.6 6.0 V R = 3 k, V = 2.0 V L IN 4.5 5.4 6.0 V R = 450 , V = 2.0 V L IN Output Balance, V 0.05 0.4 V R = 450 , V = V V BAL L BAL OH OL RS-232 Outputs EN = 0.8 V, MS+ = V , MS = V DD SS High Level Output Voltage 7.0 7.6 V VR = , V = 0.8 V DD L IN 7.0 7.6 V VR = 3 k, V = 0.8 V DD L IN Low Level Output Voltage 7.0 7.7 V VR = , V = 2.0 V SS L IN 7.0 7.7 V VR = 3 k, V = 2.0 V SS L IN Off-State Output Current, I 100 100 A EN = 2.0 V, V = 6 V, V = 15 V, V = 15 V OZ O DD SS Short Circuit Current, I 15 50 100 mA V = 0 V, EN = 0 V OS IN 15 40 100 mA V = 5 V, EN = 0 V IN Specifications subject to change without notice. ( V = +10 V 10%, V = 10 V 10%, MS+ = MS = 0 V. All Specifications T to T DD SS MIN MAX TIMING CHARACTERISTICS unless otherwise noted.) Parameter Min Typ Max Units Test Conditions/Comments Output Slew Rate Fig 1, Fig 2. R = 2 k, R = 450 , C = 50 pF SRA L L 6.65 10 14 V/s Rising/Falling Edge, t , t R F Output Slew Rate Fig 1, Fig 2. R = 10 k, R = 450 , C = 50 pF SRA L L 1.33 2.0 3 V/s Rising/Falling Edge, t , t R F Output to Hi-Z Propagation Delay (Disable) Fig 1, Fig 3. R = 10 k, R = 450 , C = 50 pF SRA L L 0.3 1.0 st HZ 0.5 1.0 st LZ Hi-Z to Valid Output Propagation Delay (Enable) Fig 1, Fig 3. R = 10 k, R = 450, C = 50 pF SRA L L 6.0 15 st ZH 7.0 15 st ZL Specifications subject to change without notice. REV. 2 A