Part A
ADM3485EAR
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 3150 PCS
- Package
- SOIC-8
- Series
- 인터페이스 - 드라이브, 수신기, 트랜시버
Replacement verdict
Compatible functional replacement candidate
ADM3485EAR and ADM3485EAR-REEL7 are the same ADM3485E transceiver die in the same 8-lead SOIC package, differing only in packing format (tube vs. tape-and-reel). They are functionally interchangeable for design, qualification, and drop-in replacement purposes; the only procurement consideration is the reel quantity and handling format required by the assembly line.
Package Type
High match
Pinout and Footprint
High match
Electrical Specifications
High match
Packing Format
Validation required
Parts at a glance
Part B
ADM3485EAR-REEL7
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 9539 PCS
- Package
- SOIC-8
- Series
- 인터페이스 - 드라이브, 수신기, 트랜시버
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM3485EAR | ADM3485EAR-REEL7 | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and quality standards. |
| Interface Type | RS-485 / RS-422 transceiver | RS-485 / RS-422 transceiver | Defines the communication protocol compatibility for the target bus design. |
| Number of Drivers/Receivers | 1 driver / 1 receiver | 1 driver / 1 receiver | Determines the half-duplex node configuration supported by the device. |
| Data Rate | 12 Mbps | 12 Mbps | Sets the maximum signaling speed the transceiver can support on the bus. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Must match the system rail to ensure proper logic levels and reliable operation. |
| Duplex Mode | Half-duplex | Half-duplex | Determines whether separate transmit and receive lines are required in the layout. |
| Mounting Type | Surface mount | Surface mount | Confirms the package can be placed on the same PCB footprint and assembly process. |
| Package / Case | 8-SOIC | 8-SOIC | Identical package ensures drop-in physical compatibility on the board. |
| Packaging | Tube | Tape & Reel (7-inch reel) | Packaging form affects assembly line feeding method and order quantity, though the device itself is identical. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures the part meets the environmental requirements of the target application. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM3485EAR | ADM3485EAR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 | 1/1 |
| Duplex | Half | Half |
| Receiver Hysteresis | 50 mV | 50 mV |
| Data Rate | 10Mbps | 10Mbps |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between ADM3485EAR and ADM3485EAR-REEL7?
The ADM3485EAR and ADM3485EAR-REEL7 are the same device: a 3.3 V, ±15 kV ESD-protected, half-duplex RS-485/RS-422 transceiver in an 8-lead SOIC package. The suffix "-REEL7" denotes the packaging option: tape and reel with 7-inch reel, while the base ADM3485EAR part number refers to the same die in the same package supplied in standard tube or tray packaging. Electrical and functional specifications are identical.
Are ADM3485EAR and ADM3485EAR-REEL7 electrically and functionally identical?
Yes. Both part numbers refer to the same Analog Devices ADM3485E transceiver die in the same 8-lead SOIC (R-8) package. The only difference is the shipping/packaging format: ADM3485EAR-REEL7 is supplied on a 7-inch tape-and-reel, while ADM3485EAR is supplied in standard bulk packaging. Datasheet parameters such as data rate, supply voltage, ESD rating, and pinout are the same for both.
What are the key verified specifications of the ADM3485EAR/ADM3485EAR-REEL7?
Per the Analog Devices datasheet: 3.3 V single-supply operation; half-duplex RS-485/RS-422 transceiver; data rate up to 12 Mbps; ±15 kV ESD protection on RS-485 input/output pins (HBM); 1/8 unit load (up to 256 nodes on the bus); low quiescent supply current; thermal shutdown and short-circuit protection; available in 8-lead SOIC package; operating temperature range −40 °C to +85 °C.
Can ADM3485EAR and ADM3485EAR-REEL7 be used interchangeably in a design?
Yes, from an electrical and footprint standpoint they are interchangeable because they are the same die in the same 8-lead SOIC package with identical pinout and specifications. The choice between them is driven by assembly/procurement considerations (tape-and-reel for automated SMT lines vs. tube/tray for other handling), not by any functional difference.
Which packaging should I choose: ADM3485EAR or ADM3485EAR-REEL7?
Choose ADM3485EAR-REEL7 when your production line uses automated pick-and-place equipment that requires 7-inch tape-and-reel packaging. Choose ADM3485EAR when tube or tray packaging is preferred, for example for prototyping, low-volume hand assembly, or when your feeder setup uses bulk packaging. Both contain the identical ADM3485E device.
Do both parts share the same pinout and package?
Yes. Both ADM3485EAR and ADM3485EAR-REEL7 use the 8-lead SOIC (R-8) package with the same pinout: RO, RE, DE, DI, GND, A, B, and VCC. PCB land patterns and layout are therefore identical for both ordering codes.
Are ADM3485EAR and ADM3485EAR-REEL7 RoHS compliant?
Both ordering codes correspond to the same ADM3485E device, and Analog Devices offers the ADM3485E in RoHS-compliant packaging. Confirm the specific RoHS status and moisture sensitivity level (MSL) for the exact ordering code on the Analog Devices product page or an authorized distributor listing before final qualification, as packaging-related compliance data is tied to the ordering code.
What is the maximum data rate and bus loading for these transceivers?
The ADM3485EAR/ADM3485EAR-REEL7 support data rates up to 12 Mbps and feature a 1/8 unit load receiver input impedance, allowing up to 256 transceivers to be connected on the same RS-485 bus. These parameters are identical for both ordering codes since they share the same silicon.