SN65HVD11D

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Transceiver
Protocol:	RS422, RS485
Number of Drivers/Receivers:	1/1
Duplex:	Half
Receiver Hysteresis:	35mV
Data Rate:	10Mbps
Voltage - Supply:	3 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	SN65HVD11

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Introduction

SN65HVD11D is a high-speed differential line driver with 3-state outputs. It is available in 16-pin small-outline packages. It serves as an interface between any TTL logic circuits and high-speed differential line receiver(s). It includes a dual low-power differential line driver, a 3-state idle control, and an overvoltage protection circuit.

Application field

This driver is a kind of interface integrated circuit, used in applications such as EIA 485-compliant local area network protocol and other differential line transmission systems. It can be used in Local Area Networks (LANs) and digital systems that require a long distance transmission with a low line-voltage level. The integrated circuit also finds its usage in Serial/ Parallel Interfaces, Fiber Optic Links, Data logging, Motor Control, Biomedical Instrumentation, Multidrop Bus Line, etc.

Working Principle

The SN65HVD11D driver works on the following principle: it Implements current-mirror output circuitry to provide differential line-driving capability over a wide voltage range (3 V to 5.5 V). It provides fast output Rise/Fall time (10 ns max @ VCC = 5 V) so that the device can maintain high-speed operation even when overvoltage protection circuitry is activated. The output voltage of the SN65HVD11D is approximately equal to VCC within the device\'s specified voltage range. As such, the output voltage can be used to determine whether the IC is in an Overvoltage Protection (OVP) state (Output voltage is 2V). The internal output current limit (IOL) is set at a default of 12 mA. The high output impedance of the driver allows it to drive signals at a wide range of impedances or baud rates.The SN65HVD11D is also equipped with a 3-state idle control. This allows the transmitter to avoid sending signals during idle periods such as in LAN broadcast applications. The idle state is controlled by a user-defined logic signal, which is typically connected to a logic "1". When the logic is low, the state of the output is in the low impedance state. Additionally, when the logic is high and the VCC is greater than 3 V (ViH > 3 V), the output is in a high modulation state.

Conclusion

The SN65HVD11D driver is a high-speed differential line driver with 3-state outputs, which is used in applications such as EIA 485-compliant local area network protocol and other differential line transmission systems. It includes a dual low-power differential line driver, a 3-state idle control, and an overvoltage protection circuit. The driver allows fast output Rise/Fall time (10 ns max @ VCC = 5 V) and a high output impedance of the driver enables signals at a wide range of impedances or baud rates. With all the features, the driver can efficiently serve as an interface between any TTL logic circuits and high-speed differential line receiver(s).

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