SP3495E
Overview
Information | 3.3V High Speed RS-485/RS-422 Transceivers, Advanced Fail-safe, Hot Swap Protection, ±15kV ESD-Protected |
---|---|
Supported Protocols | RS-422, RS-485 |
Supply Voltage (Nom) (V) | 3.3 |
No. of Tx | 1 |
No. of Rx | 1 |
Duplex | Half |
Data Rate (MAX) (Mbps) | 32 |
HBM ESD (kV) | 15 |
IEC 61000-4-2 Contact (±kV) | - |
Rx Fail-Safe | Standard |
Multi-Drop Nodes | 64 |
Transient Tolerance (V) | |
Fault Tolerance (V) | |
VL Pin | |
Temperature Range (°C) | -40 to 85 |
Package | NSOIC-8 |
ICC (Max) (mA) | 5 |
Shutdown | |
Typ Shutdown Current (µA) | 1 |
Hot Swap | |
PROFIBUS (5V) or High Output (3V) |
The SP3495E - SP3497E transceivers are suitable for high speed
bidirectional communication on multipoint bus transmission lines. They
are designed for balanced data transmission and comply with both RS-485
and RS-422 EIA standards. Each device contains one differential driver
and one differential receiver
Driver differential outputs and receiver differential inputs are
connected internally to form a half-duplex input/output to the RS-485
bus. Separate RE and DE pins enable and disable the driver and receiver
independently or may be externally connected together as a direct
control. The device enters a low power shutdown mode if both driver and
receiver are disabled. the bus-pin outputs of disabled or powered down
devices are in high impedance state. The high impedance driver output is
maintained over the entire common-mode voltage range of -7V to +12V.
SP3495E - SP3497E operates from a single 3.3V power supply. SP3495E -
SP3497E transceivers load the data bus only half as much as a standard
RS-485 unit load. This allows up to 64 devices to be connected
simultaneously on a bus without violating required RS-485 signal margin
and without using repeaters. Excessive power dissipation caused by bus
contention or by shorting outputs to ground or a voltage source is
prevented by short circuit protection and thermal shutdown. This feature
forces the driver output into high impedance state if the absolute
value of the output current exceeds 250mA or if junction temperature
exceeds 165°C. Receivers will fail-safe to a logic high output state if
the inputs are unconnected (floating) or shorted. All RS-485 inputs and
outputs are ESD protected up to +/-15kV Human Body Model.
- Full Duplex RS-485 Transceiver
- 3.3V Single Supply Operation
- High Speed Date Rate – 32Mbps
- Receiver fail-safe on open, short or terminated lines
- 1/2 Unit Load, 64 transceivers on bus
- Hot Swap glitch protection on control inputs
- Driver short circuit current limit and thermal shutdown for overload protection
- 1µA shutdown mode
- Industry standard package footprints
- Robust ESD Specifications:
- ±15KV Human Body Model
- Factory Automation Controls
- Motor Control
- Industrial Process Control
- Building Automation
- Security Systems
- Remote Utility Meter Reading
- Long or un-terminated transmission lines
Documentation & Design Tools
Type | Title | Version | Date | File Size |
---|---|---|---|---|
Data Sheets | SP3495E-3497E High Speed +3.3V RS-485/RS-422 Transceivers with +/-15KV ESD Protection and Advanced Failsafe | 1.0.0 | May 2009 | 479.7 KB |
Application Notes | RS-232 and RS-485 PCB Layout Application Note | R00 | December 2022 | 2.8 MB |
Application Notes | AN-292, RS-485 Cable Lengths vs Data Signaling Rate | R01 | July 2022 | 2.7 MB |
Application Notes | ANI-13, RS-485 and RS-422 Physical Topologies | D | December 2006 | 183.2 KB |
Product Brochures | Interface Brochure | November 2023 | 3.7 MB |
Parts & Purchasing
Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
---|---|---|---|---|---|---|
SP3495EEN-L | NSOIC8 | -40 | 85 | OBS | ||
SP3495EEN-L/TR | NSOIC8 | -40 | 85 | OBS |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
Notifications
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
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Submit a Technical Support Question As a New Question
For RS-232 it is 50 feet (15 meters), or the cable length equal to a capacitance of 2500 pF, at a maximum transmission rate of 19.2kbps. When we reduce the baud rate, it allows for longer cable length. For Example:
Baud Rate (bps) | Maximum RS-232 Cable Length (ft) |
19200 | 50 |
9600 | 500 |
4800 | 1000 |
2400 | 3000 |
Fail Safe is an attempt to keep the output of the RS-485 receiver to a known state. Transceivers may have standard fail safe or advanced / enhanced receiver fail safe features. Standard fail safe supports open inputs while enhanced fail safe transceivers such as the SP339 and XR34350 support open input, shorted input and undriven terminated lines without external biasing. See Application Note ANI-22 for more detail.
The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.