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GND

D PACKAGE (TOP VIEW)

NC - No internal connection

LOGIC DIAGRAM (POSITIVE LOGIC)

SN65HVD37

www.ti.com

SLLSE92 A –OCTOBER 2011–REVISED NOVEMBER 2011

Low-Power 3.3V-Supply Full-Duplex RS-485 Driver/Receiver

Check for Samples: SN65HVD37

FEATURES

DESCRIPTION

The SN65HVD37 combines a robust differential driver

• Low-Current Standby Mode: <1 μA Typical

and a receiver with high noise immunity for

• Operational Quiescent Current < 1 mA

demanding industrial applications. The driver

• High Receiver Hysteresis for Noise Immunity

differential outputs and the receiver differential inputs

(60 mV Typical)

are separate pins, to form a bus port for full-duplex

(four-wire) communications. The driver and receiver

• 1/8 Unit-Load (Up to 256 Nodes on the Bus)

can be independently enabled, and feature a wide

• Bus-pin ESD Protection Exceeds 15 kV HBM

common-mode voltage range, making this device

• Driver Output Transition Times Optimized for

suitable for multi-point applications over long cable

Signaling Rate up to 20 Mbps

runs. The SN65HVD37 is characterized over the

temperature range of -40ºC to 85 ºC.

• Glitch-Free Power-Up and Power-Down

Protection for Hot-Plugging Applications

• 5V-Tolerant Logic Inputs

• Bus Idle, Open, and Short-Circuit Failsafe

• Driver Current Limiting and Thermal Shutdown

• Fully Meets All TIA-485-A Specifications

APPLICATIONS

• Telecommunications Equipment

• Industrial Automation

• Process Automation

• Building Automation

• Point-of-Sale (POS) Terminals

• Improved Replacement for ADM3076,

ADM3491, LTC2852, MAX3491 and SP3491

Figure 1. 60 mV Receiver Hysteresis for Noise Immunity

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.

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.

Summary of content (14 pages)

PAGE 1
SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com Low-Power 3.3V-Supply Full-Duplex RS-485 Driver/Receiver Check for Samples: SN65HVD37 FEATURES DESCRIPTION • • • The SN65HVD37 combines a robust differential driver and a receiver with high noise immunity for demanding industrial applications. The driver differential outputs and the receiver differential inputs are separate pins, to form a bus port for full-duplex (four-wire) communications.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 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. ABSOLUTE MAXIMUM RATINGS (1) VALUE/UNITS VCC Supply voltage –0.5 V to 7 V Voltage range at A, B, Y, Z pins –13 V to 13 V Input voltage range at any logic pin –0.3 V to 5.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER |VOD| Driver differential output voltage magnitude TEST CONDITIONS 1.9 V RL = 54 Ω (RS-485) 1.5 2 V 2 2.2 V –0.1 0 0.1 V 1.5 VCC /2 2.5 V 0.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com SWITCHING CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 3 UNIT DRIVER Driver differential output rise/fall time tr, tf tPHL, tPLH Driver propagation delay tSK(P) Driver pulse skew, |tPHL – tPLH| tPHZ, tPLZ Driver disable time tPZH, tPZL 6 14 RL = 54 Ω, CL = 50 pF, See Figure 4 10 20 See Figure 5 and Figure 6 20 50 ns 8 25 ns 2.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS D and DE Input RE Input VCC VCC 130 kW 1.5 kW 1.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION Input generator rate is 100 kbps, 50% duty cycle, rise and fall times less than 6 nsec, output impedance 50 Ω 375 Ω ±1% VCC DE D Y VOD 0 or 3 V 60 Ω ±1% + _ −7 V < V(test) < 12 V Z 375 Ω ±1% Figure 2.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) 3V RL = 110 Ω ± 1% Y 3V VI S1 D 50 % 50 % VO 0V Z DE Input Generator 3V t PZL t PLZ 3V CL = 50 pF ±20% VI 50 Ω VO 50 % 10 % VOL NOTE: D at 0 V to test non-inverting output, D at 3 V to test inverting output. C L Includes Fixture and Instrumentation Capacitance Figure 6.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS SUPPLY CURRENT vs SIGNALING RATE DIFFERENTIAL OUTPUT VOLTAGE vs DIFFERENTIAL OUTPUT CURRENT 3.5 65 RL = 54 W, CL = 50 pF VOD - Differential Output Voltage - V ICC - Supply Current - mA 60 VCC = 3.6 V VCC = 3 V VCC = 3.3 V 55 VCC = 3.6 V 50 45 40 35 3.0 2.0 1.5 1.0 RL = 60 W 0.5 VCC = 3 V 0 30 0 5 10 Signaling Rate - Mbps 15 20 0 Figure 10.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) DRIVER RISE/FALL TIME vs FREE-AIR TEMPERATURE 7.5 7.0 VCC = 3.6 V, RL = 54, CL = 50 pF Rise/Fall Time - ns 6.5 6.0 VCC = 3 V VCC = 3.3 V VCC = 3.6 V 5.5 5.0 4.5 4.0 3.5 -40 -20 0 20 40 60 TA - Free-Air Temperature -° C Figure 13. 80 Master Node Slave Node Slave Node Slave Node Figure 14.
PAGE 10
SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com APPLICATION INFORMATION RECEIVER FAILSAFE The differential receiver is “failsafe” to invalid bus states caused by: • open bus conditions such as a disconnected connector, • shorted bus conditions such as cable damage shorting the twisted-pair together, • or idle bus conditions that occur when no driver on the bus is actively driving.
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SN65HVD37 SLLSE92 A – OCTOBER 2011 – REVISED NOVEMBER 2011 www.ti.com REVISION HISTORY Changes from Original (October 2011) to Revision A • Page Changed the device From: Product Preview To: Production ................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.