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Name: ST485BDR
Brand: STMicroelectronics
SKU: ST485BDR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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STMicroelectronics ST485BDR

Part No.:: ST485BDR

Manufacturer:: STMicroelectronics

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: ST485BDR.pdf

Description:: IC TRANSCEIVER HALF 1/1 8SO

In Stock:: 3225

Quantity:: Add To Cart

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ST485BDR Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
Type:
Transceiver
Protocol:
RS422, RS485
NumberofDrivers/Receivers:
1/1
Duplex:
Half
ReceiverHysteresis:
70 mV
DataRate:
2.5Mbps
Voltage-Supply:
4.75V ~ 5.25V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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ST485BDR information

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ST485BDR Typical application Circuitry

ST485BDR

The ST485BDR is a transceiver IC designed for RS-485 communication. It is commonly used to enable robust serial data communication in various industrial and automotive applications. Below, you'll find its key features, an example application scenario, and considerations for designing a circuit using the ST485BDR.

Key Features of ST485BDR:

1. RS-485 Compatibility: The ST485BDR is compatible with the RS-485 communication standard, which is known for its differential signaling and noise immunity.

2. Differential Signaling: It uses differential signaling to transmit and receive data, reducing the impact of noise in industrial environments.

3. Low Power Consumption: Because of its low power consumption design, the integrated circuit is appropriate for battery-powered applications.

4. Broad Voltage Spectrum: It can normally run between 4.5 and 5.5 volts, which is a broad range of supply voltages.

5. Short-Circuit and Overload Protection: It provides protection against short-circuits and overloads on the communication lines.

6. High ESD Protection: The IC may offer high electrostatic discharge (ESD) protection, enhancing its robustness.

7. Driver and Receiver Enable Function: Some models offer driver and receiver enable pins for controlling data transmission and reception.

Example Application: Industrial Data Communication

Let's explore a common application scenario for the ST485BDR: designing a circuit for data communication between industrial sensors and a central control unit.

Circuit Connection:

1. ST485BDR Pin 1 (DI, A-): Connect this pin to the A- (negative) line of the RS-485 network.

2. ST485BDR Pin 2 (RO, A+): Connect this pin to the A+ (positive) line of the RS-485 network.

3. ST485BDR Pin 3 (DE, /RE): Connect this pin to a microcontroller's control output or a separate control signal to enable data transmission (DE) or receive (RE). This pin is active low (/RE).

4. ST485BDR Pin 4 (DI, B-): Connect this pin to the B- (negative) line of the RS-485 network.

5. ST485BDR Pin 5 (RO, B+): Connect this pin to the B+ (positive) line of the RS-485 network.

6. ST485BDR Pin 6 (VCC): Connect this pin to the supply voltage (VCC), typically 5V.

7. ST485BDR Pin 7 (GND): Connect this pin to the ground reference (GND) of your circuit.

Design Considerations:

1. Termination: Implement proper termination resistors at the ends of the RS-485 network to minimize signal reflections.

2. Baud Rate and Data Format: Ensure that all devices on the network communicate at the same baud rate and use the same data format.

3. Bus Length: Consider the maximum cable length and the number of devices on the network to maintain signal integrity.

4. Control of DE and /RE: Control the DE and /RE pins appropriately to enable data transmission or reception as needed.

5. Noise Immunity: Implement noise-reduction techniques like twisted-pair cabling and filtering to improve communication reliability.

6. ESD Protection: Ensure that the network is adequately protected against electrostatic discharge events.

7. Grounding: Pay attention to grounding to minimize ground potential differences between devices.

8. Power Supply Stability: Ensure a stable and clean power supply to the transceiver to maintain proper operation.

In summary, the ST485BDR is a reliable RS-485 transceiver commonly used in industrial data communication. When designing a circuit with this transceiver, it is crucial to address termination, baud rate, bus length, control of DE and /RE pins, noise immunity, ESD protection, grounding, and power supply stability to ensure robust and dependable data communication in your specific industrial application.

ST485BDR FAQ

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3. Are the ST485BDR price and inventory displayed accurate?

The price and inventory of ST485BDR fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.

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6. What is the process for return or replacement of ST485BDR?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the ST485BDR we delivered, we will accept the replacement or return of the ST485BDR only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of ST485BDR.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations