SN65HVD30DR Electronic IC Chips FULL-DUPLEX RS-485 DRIVERS AND RECEIVERS
electronic integrated circuit
,linear integrated circuits
SN65HVD30 - SN65HVD39
3.3V FULL-DUPLEX RS-485 DRIVERS AND RECEIVERS
FEATURES
• 1/8 Unit-Load Option Available (Up to 256 Nodes on the Bus)
• Bus-Pin ESD Protection Exceeds 15 kV HBM
• Optional Driver Output Transition Times for Signaling Rates(1) of 1 Mbps, 5 Mbps and 25 Mbps
• Low-Current Standby Mode: < 1 µA
• Glitch-Free Power-Up and Power-Down Protection for Hot-Plugging Applications
• 5-V Tolerant Inputs
• Bus Idle, Open, and Short Circuit Failsafe
• Driver Current Limiting and Thermal Shutdown
• Meets or exceeds the requirements of ANSI TIA/EIA-485-A and RS-422 Compatible
• 5-V Devices available, SN65HVD50-59
(1) The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).
APPLICATIONS
• Utility Meters
• DTE/DCE Interfaces
• Industrial, Process, and Building Automation
• Point-of-Sale (POS) Terminals and Networks
DESCRIPTION
The SN65HVD3X devices are 3-state differential line drivers and differential-input line receivers that operate with 3.3-V power supply.
Each driver and receiver has separate input and output pins for full-duplex bus communication designs. They are designed for balanced transmission lines and interoperation with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11 and ISO 8482:1993 standard-compliant devices.
The SN65HVD30, SN65HVD31, SN65HVD32, SN65HVD36 and SN65HVD37 are fully enabled with no external enabling pins. The SN65HVD36 and SN65HVD37 implement receiver equalization technology for improved performance in long distance applications.
The SN65HVD33, SN65HVD34, SN65HVD35, SN65HVD38, and SN65HVD39 have active-high driver enables and active-low receiver enables. A very low, less than 1µA, standby current can be achieved by disabling both the driver and receiver. The SN65HVD38 and SN65HVD39 implement receiver equalization technology for improved performance in long distance applications.
All devices are characterized for operation from –40°C to 85°C.
The SN65HVD36 and SN65HVD38 implement receiver equalization technology for improved jitter performance on differential bus applications with data rates up to 20 Mbps at cable leCM GROUPhs up to 160 meters.
The SN65HVD37 and SN65HVD39 implement receiver equalization technology for improved jitter performance on differential bus applications with data rates in the range of 1 to 5 Mbps at cable leCM GROUPhs up to 1000 meters.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)(2)
| UNIT | ||
| VCC | Supply voltage range | –0.3 V to 6 V |
| V(A) , V(B) , V(Y) , V(Z) | Voltage range at any bus terminal (A, B, Y, Z) | –9 V to 14 V |
| V(TRANS) |
Voltage input, transient pulse through 100 Ω. See Figure 12 (A, B, Y, Z) (3) |
–50 to 50 V |
| VI | Input voltage range (D, DE, RE) | -0.5 V to 7 V |
| PD(cont) | Continuous total power dissipation | Internally limited(4) |
| IO | Output current (receiver output only, R) | 11 mA |
(1) 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.
(2) All voltage values, except differential I/O bus voltages, are with respect to network ground terminal.
(3) This tests survivability only and the output state of the receiver is not specified.
(4) The thermal shutdown protection circuit internally limits the continuous total power dissipation. Thermal shutdown typically occurs when the junction temperature reaches 165°C.
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