SP485EE RS-485/RS-422 Transceiver IC DIP-8
SP485EE DIP-8 is a low-power half-duplex RS-485/RS-422 transceiver with BiCMOS design, enhanced ESD protection and bus enable control.
5.00 EGP
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The SP485E is a half-duplex differential transceiver designed to interface digital logic with balanced RS-485 and RS-422 serial buses. It combines a differential line driver and receiver in one integrated circuit, allowing the same bus pair to be used for transmitting and receiving at different times. The device belongs to the enhanced version of the SP485 family and is designed around a low-power BiCMOS process.
Internally, the driver accepts logic data at the DI input and converts it into complementary differential signals on the A and B lines. The receiver monitors the voltage difference between these bus lines and reproduces the received logic state at RO. Separate DE and RE control inputs determine whether the driver and receiver are active or placed in a high-impedance state, providing controlled access to the communication bus.
Features:
- Half-duplex RS-485 and RS-422 transceiver architecture.
- Low-power BiCMOS design.
- Separate driver and receiver enable controls.
- Suitable for multi-drop configurations.
- Enhanced ESD protection.
- Differential driver outputs.
- Differential receiver inputs.
- Tri-state driver and receiver control.
- Fail-safe receiver operation for open inputs.
- Pin-to-pin compatibility with established SP485-type interfaces.
- Available in an 8-pin Plastic DIP package.
Specifications:
| Specification | SP485EE / SP485EEP |
|---|---|
| Device Type: | Half-duplex differential transceiver |
| Supported Protocols: | RS-485, RS-422 |
| Supply Voltage: | 4.75 V to 5.25 V |
| Nominal Supply: | 5 V |
| Maximum Data Rate: | 10 Mbps |
| Driver Differential Output, RS-422: | ≥ 2 V with 50 Ω load |
| Driver Differential Output, RS-485: | ≥ 1.5 V with 27 Ω load |
| Driver Common-Mode Output Voltage: | 3 V max. |
| Logic Input HIGH: | ≥ 2.0 V |
| Logic Input LOW: | ≤ 0.8 V |
| Logic Input Current: | ±10 µA |
| Driver Short-Circuit Current: | ±250 mA max. |
| Driver Propagation Delay: | 30 ns typ., 60 ns max. |
| Driver Skew: | 5 ns typ., 10 ns max. |
| Driver Rise/Fall Time: | 15 ns typ., 40 ns max. |
| Receiver Differential Input Threshold: | −0.2 V to +0.2 V |
| Receiver Input Hysteresis: | 20 mV typ. |
| Receiver Input Resistance: | 12 kΩ min., 15 kΩ typ. |
| Receiver Common-Mode Range: | −7 V to +12 V |
| Receiver Output HIGH: | ≥ 3.5 V |
| Receiver Output LOW: | ≤ 0.4 V |
| Receiver Propagation Delay: | 45 ns typ., 100 ns max. |
| No-Load Supply Current: | 600–900 µA depending on control state |
| ESD — Human Body Model: | ±15 kV |
| ESD — Air Discharge: | ±15 kV |
| ESD — Contact Discharge: | ±8 kV |
| Absolute Maximum VCC: | +7 V |
| Storage Temperature: | −65°C to +150°C |
| Industrial Operating Temperature: | −40°C to +85°C |
| DIP Ordering Code: | SP485EEP |
| Package: | 8-pin Plastic DIP / PDIP |
| PDIP Power Dissipation: | 1000 mW |
| Pin 1: | RO — Receiver Output |
| Pin 2: | RE — Receiver Output Enable, active LOW |
| Pin 3: | DE — Driver Output Enable, active HIGH |
| Pin 4: | DI — Driver Input |
| Pin 5: | GND — Ground |
| Pin 6: | A — Non-inverting Driver Output / Receiver Input |
| Pin 7: | B — Inverting Driver Output / Receiver Input |
| Pin 8: | VCC — Positive Supply |
| DIP Lead Pitch: | 2.54 mm / 0.100 in |
| DIP Body Length (D): | 9.017–10.160 mm |
| DIP Width (E): | 7.620–8.255 mm |
Applications:
- Multi-Drop Communication Systems.
- Long-Distance Data Interfaces.
- RS-485 Multi-Point Networks.
- RS-485 Data Bus Systems.
- RS-422 Communication Interfaces.
- Differential Data Communication Systems.
Package Contents:
- 1x SP485EE RS-485/RS-422 Transceiver IC DIP-8
Datasheet
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