Part A
ADM211EARSZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4657 PCS
- Package
- SSOP-28
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM211EARSZ is a RoHS-compliant variant of the ADM211EARS and serves as a functionally compatible replacement candidate. Both parts share the same RS-232 transceiver architecture, channel configuration, supply voltage range, and package footprint, with the primary distinction being the lead-free (Pb-free) finish of the ADM211EARSZ. Designers should confirm solder profile compatibility and any documentation requirements tied to the RoHS status before substituting in production.
Function and Protocol
High match
Channel Configuration
High match
Package and Pinout
High match
RoHS and Lead Finish
Validation required
Parts at a glance
Part B
ADM211EARS
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7504 PCS
- Series
- Interface - Drivers, Receivers, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM211EARSZ | ADM211EARS | Why it matters |
|---|---|---|---|
| Number of Drivers/Receivers | 4/5 | 4/5 | Defines the channel count and directionality; must match for functional substitutability. |
| Data Rate | 120 kbps | 120 kbps | Determines maximum communication speed supported by the transceiver. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Must be compatible with the system power rail for correct operation. |
| Mounting Type | Surface Mount | Surface Mount | Must match the PCB assembly method and footprint. |
| Package / Case | 28-SSOP | 28-SSOP | Footprint and pinout must be identical for drop-in replacement. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Ensures the device operates reliably within the target environment. |
| RoHS Compliance | RoHS Compliant (lead-free) | Non-RoHS (contains lead) | Affects regulatory compliance and solder process compatibility; the "Z" suffix denotes lead-free. |
| Protocol | RS-232 | RS-232 | Must match the interface standard used by the system. |
| Duplex Mode | Full Duplex | Full Duplex | Determines simultaneous bidirectional communication capability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM211EARSZ | ADM211EARS |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers / Receivers | - | 4/5 |
| Duplex | Full | Full |
| Receiver Hysteresis | 650 mV | 650 mV |
| Data Rate | 120Kbps | 120Kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | ADM211 |
| Number of Drivers/Receivers | 4/5 | - |
Frequently asked questions
What is the difference between ADM211EARSZ and ADM211EARS?
The ADM211EARSZ is the RoHS-compliant, lead-free (Pb-free) version of the ADM211EARS. Both are quad RS-232 line drivers/receivers in a 28-lead SSOP package from Analog Devices. The "Z" suffix in ADM211EARSZ denotes the lead-free/RoHS-compliant package finish, while ADM211EARS is the older non-RoHS (leaded) variant. Functionally and electrically they are the same device.
Are ADM211EARSZ and ADM211EARS electrically and functionally interchangeable?
Yes. Both parts share the same datasheet specifications: quad RS-232 drivers/receivers, 5 V single-supply operation, on-chip charge pump, and 28-lead SSOP package. The only documented difference is the package finish (lead-free/RoHS for the Z version). They are drop-in compatible in terms of pinout and electrical performance.
What package do ADM211EARSZ and ADM211EARS use?
Both devices are supplied in a 28-lead SSOP (Shrink Small Outline Package), designated by the "RS" suffix in the part number. The package dimensions and pin assignments are identical between the two variants.
Is ADM211EARSZ RoHS compliant while ADM211EARS is not?
Yes. The "Z" suffix in ADM211EARSZ indicates a lead-free, RoHS-compliant finish, which is the standard for current Analog Devices ordering codes. ADM211EARS is the legacy non-RoHS (leaded) version. Designs requiring RoHS compliance should specify ADM211EARSZ.
What are the key technical specifications shared by ADM211EARSZ and ADM211EARS?
Both are quad RS-232 drivers/receivers operating from a single 5 V supply with an on-chip charge pump, supporting data rates up to 120 kbps, with four drivers and four receivers, and housed in a 28-lead SSOP. These parameters are common to both variants per the Analog Devices datasheet.
Can ADM211EARSZ be used as a direct replacement for ADM211EARS in an existing design?
Yes, in most cases. Because the pinout, package, and electrical specifications are identical, ADM211EARSZ can directly replace ADM211EARS. The only consideration is that the lead-free finish may require reflow profile adjustment to comply with RoHS soldering requirements.
Which variant should be selected for a new RoHS-compliant design?
ADM211EARSZ should be selected for new designs requiring RoHS compliance, as it carries the lead-free (Z) designation. ADM211EARS is the legacy non-RoHS version and is generally not recommended for new designs.