Part A
ADM485ANZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1268 ПКС
- Package
- DIP-8
- Series
- Интерфейс - драйверы, приемники, передатчики
Replacement verdict
Compatible functional replacement candidate
The ADM485ANZ and ADM485JN are functionally equivalent RS-485 transceivers sharing the same core interface, package, and supply requirements, making them a viable replacement candidate. The primary distinction lies in their operating temperature range, which should be validated against the target application's environmental conditions before substitution.
Interface Standard
High match
Package Type
High match
Supply Voltage
High match
Operating Temperature Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM485ANZ | ADM485JN | Why it matters |
|---|---|---|---|
| Data Rate | 5 Mbps | 5 Mbps | Determines the maximum communication speed the transceiver can support on the RS-485 bus. |
| Duplex Mode | Half-duplex | Half-duplex | Defines whether the device can transmit and receive simultaneously; half-duplex uses a single twisted pair. |
| Number of Drivers/Receivers | 1/1 | 1/1 | Indicates the transceiver configuration; both provide one differential driver and one receiver per package. |
| Supply Voltage | 5 V | 5 V | Must match the system rail; both operate from a single 5 V supply. |
| Operating Temperature Range | -40 °C to +85 °C | 0 °C to +70 °C | The industrial-grade ANZ variant supports extended temperatures, while the JN variant is limited to commercial ranges. |
| Package / Mounting | 8-Pin SOIC (surface mount) | 8-Pin PDIP (through-hole) | Footprint and assembly method differ; the two parts are not drop-in compatible on the same PCB. |
| Mounting Type | Surface Mount | Through Hole | Affects board layout and rework; surface-mount vs through-hole requires different assembly processes. |
| RoHS Compliance | RoHS compliant | Non-RoHS (contains lead) | RoHS status affects regulatory compliance and suitability for markets restricting hazardous substances. |
| Number of Pins | 8 | 8 | Pin count is identical, but pinout and package body differ between SOIC and PDIP. |
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 | ADM485ANZ | ADM485JN |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers / Receivers | - | 1/1 |
| Duplex | Half | Half |
| Receiver Hysteresis | 70 mV | 70 mV |
| Data Rate | 5Mbps | 5Mbps |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Through Hole | Through Hole |
| Base Product Number | - | ADM485 |
| Number of Drivers/Receivers | 1/1 | - |
Frequently asked questions
What are the key differences between the ADM485ANZ and ADM485JN?
Both are 5 V, low-power, half-duplex RS-485/RS-422 transceivers in 8-lead PDIP packages from Analog Devices. The primary difference is the operating temperature range: the ADM485ANZ is specified for the industrial temperature range of −40°C to +85°C, while the ADM485JN is specified for the commercial temperature range of 0°C to +70°C. The ADM485JN is also a legacy part that Analog Devices lists as not recommended for new designs.
Are the ADM485ANZ and ADM485JN pin-compatible?
Yes. Both devices are offered in the same 8-lead PDIP (N-8) package with an identical pinout: RO, RE, DE, DI, GND, A, B, and VCC. This allows the ADM485ANZ to be used as a drop-in replacement for the ADM485JN on an existing PCB layout, provided the wider temperature range is acceptable.
Do the ADM485ANZ and ADM485JN have the same electrical specifications?
Yes. Both parts share the same datasheet specifications: 5 V single-supply operation, data rates up to 5 Mbps, low quiescent supply current (typically 300 µA), and driver/receiver characteristics compliant with RS-485 and RS-422 standards. The only specified difference between the two orderable part numbers is the operating temperature range.
Can the ADM485ANZ be used to replace the ADM485JN in an existing design?
Yes, in most cases. Because the ADM485ANZ is pin-compatible and electrically equivalent, it can replace the ADM485JN directly. The ADM485ANZ offers a wider −40°C to +85°C temperature range, so it covers all conditions in which the commercial-grade ADM485JN (0°C to +70°C) is specified to operate.
Which part should be selected for new designs, the ADM485ANZ or the ADM485JN?
The ADM485ANZ is the preferred choice for new designs. Analog Devices lists the ADM485JN as not recommended for new designs, while the ADM485ANZ remains an active, industrial-temperature-range part. Designers should confirm current lifecycle status and availability with Analog Devices or an authorized distributor before finalizing a bill of materials.
What data rate and supply voltage do the ADM485ANZ and ADM485JN support?
Both devices operate from a single 5 V supply and support data rates up to 5 Mbps. They are half-duplex transceivers intended for RS-485 and RS-422 communication, with slew-rate-limited outputs that reduce electromagnetic interference and reflections on improperly terminated buses.
Are the ADM485ANZ and ADM485JN RoHS compliant?
The ADM485ANZ is supplied in a lead-free, RoHS-compliant 8-lead PDIP package, as indicated by the "Z" suffix in the part number. The ADM485JN is a legacy commercial-grade part; designers should verify the RoHS status of specific date codes and packaging with the manufacturer or authorized distributor, as legacy inventory may predate current compliance markings.