SN75LBC179AD

SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS Check for Samples: SN65LBC179A, SN75LBC179A FEATURES 1 • 2 • • • • • • • High-Speed Low-Power LinBiCMOS™ Circuitry Designed for Signaling Rates(1) of up to 30 Mbps Bus-Pin ESD Protection Exceeds 12 kV HBM Very Low Disabled Supply-Current Requirements . . . 700 μA Max Common-Mode Voltage Range of –7 V to 12 V Low Supply Current . . .15 mA Max Compatible With ANSI Standard TIA/EAI-485-A and ISO8482: 1987(E) Positive and Negative Output Current Limiting Driver Thermal Shutdown Protection SN65LBC179AD (Marked as BL179A) SN65LBC179AP (Marked as 65LBC179A) SN75LBC179AD (Marked as LB179A) SN75LBC179AP (Marked as 75LBC179A) (TOP VIEW) VCC R D GND 1 8 2 7 3 6 4 5 A B Z Y LOGIC DIAGRAM (POSITIVE LOGIC) R (1) Signaling rate by TIA/EIA-485-A definition restrict transition times to 30% of the bit length, and much higher signaling rates may be achieved without this requirement as displayed in the TYPICAL CHARACTERISTICS of this device. D 8 2 7 5 3 6 A B Y Z DESCRIPTION The SN65LBC179A and SN75LBC179A differential driver and receiver pairs are monolithic integrated circuits designed for bidirectional data communication over long cables that take on the characteristics of transmission lines. They are balanced, or differential, voltage mode devices that are compatible with ANSI standard TIA/EIA-485-A and ISO 8482:1987(E). The A version offers improved switching performance over its predecessors without sacrificing significantly more power. The SN65LBC179A and SN75LBC179A combine a differential line driver and differential input line receiver and operate from a single 5-V supply. The driver differential outputs and the receiver differential inputs are connected to separate terminals for full-duplex operation and are designed to present minimum loading to the bus when powered off (VCC = 0). These parts feature a wide positive and negative common-mode voltage range making them suitable for point-to-point or multipoint data bus applications. The devices also provide positive- and negative-current limiting and thermal shutdown for protection from line fault conditions. The SN65LBC179A is characterized over the industrial temperature range of –40°C to 85°C. The SN75LBC179A is characterized for operation over the commercial temperature range of 0°C to 70°C. FUNCTION TABLE (1) DRIVER INPUT D (1) RECEIVER DIFFERENTIAL INPUTS A–B OUTPUT R Z VID ≥ 0.2 V H ? OUTPUTS Y H H L -0.2 V < VID < 0.2 V L L H VID ≤ -0.2 V L OPEN H L Open circuit H H = high level, L = low level, ? = indeterminate 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. LinBiCMOS is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2000–2011, Texas Instruments Incorporated SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. AVAILABLE OPTIONS PACKAGE TA SMALL OUTLINE (D) PLASTIC DUAL-IN-LINE 0°C to 70°C SN75LBC179AD SN75LBC179AP –40°C to 85°C SN65LBC179AD SN65LBC179AP SCHEMATICS OF INPUTS AND OUTPUTS D Inputs VCC 100 kΩ 1 kΩ Input 8V A Input B Input VCC 16 V 100 kΩ VCC 16 V 4 kΩ 4 kΩ 18 kΩ 18 kΩ Input Input 100 kΩ 16 V 16 V 4 kΩ 4 kΩ Y AND Z Outputs VCC R Output VCC 16 V Receiver 40 Ω Output Output 8V 16 V Receiver 2 Submit Documentation Feedback Copyright © 2000–2011, Texas Instruments Incorporated Product Folder Link(s): SN65LBC179A SN75LBC179A SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) UNIT VCC Supply voltage range (2) Voltage range IO –0.3 V to 6 V A, B, Y, or Z (2) –10 V to 15 V D or R (2) –0.3 V to VCC + 0.5 V ±20 mA Receiver output current (3) 12 kV Bus terminals and GND, Class 3, B (3) 400 V Bus terminals and GND, Class 3, A Electrostatic discharge All terminals, Class 3, A 3 kV All terminals, Class 3, B 400 V Continuous total power dissipation (4) Internally limited Total power dissipation (1) (2) (3) (4) See Dissipation Rating Table Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values, except differential I/O bus voltages, are with respect to GND. Tested in accordance with MIL-STD-883C, Method 3015.7 The maximum operating junction temperature is internally limited. Uses the dissipation rating table to operate below this temperature. DISSIPATION RATINGS (1) PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR (1) ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING D 725 mW 5.8 mW/°C 464 mW 377 mW P 1100 mW 8.08 mW/°C 640 mW 520 mW This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with no air flow. RECOMMENDED OPERATING CONDITIONS VCC Supply voltage VIH High-level input voltage D VIL Low-level input voltage D VID Differential input voltage (1) MIN NOM MAX UNIT 4.75 5 5.25 V 2 VCC V 0 0.8 V –12 (2) 12 V –7 12 V VO VI Voltage at any bus terminal (separately or common-mode) A, B, Y, or Z VIC IOH High-level output current IOL Low-level output current TA Operating free-air temperature (1) (2) Y or Z R –60 mA –8 Y or Z 60 R 8 SN65LBC179A –40 85 SN75LBC179A 0 70 mA °C Differential input/output bus voltage is measured at the noninverting terminal with respect to the inverting terminal. The algebraic convention, in which the least positive (most negative) limit is designated as minimum, is used in this data sheet. Copyright © 2000–2011, Texas Instruments Incorporated Product Folder Link(s): SN65LBC179A SN75LBC179A Submit Documentation Feedback 3 SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com DRIVER ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER VIK II = –18 mA Input clamp voltage Differential output voltage MAX –1.5 –0.8 SN65LBC179A 1 1.5 3 SN75LBC179A 1.1 1.5 3 RL = 60 Ω, –7