Part A
ADM211EARSZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4657 PCS
- Package
- SSOP-28
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Compatible functional replacement candidate
The ADM211EARSZ and ADM211ARS are functionally equivalent RS-232 transceivers from the same manufacturer family, sharing identical pinout, package, channel configuration, and supply requirements. The ADM211EARSZ adds enhanced ESD protection, making it a robust drop-in candidate for the ADM211ARS in most designs, with validation recommended only where the original ESD rating was specifically qualified.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
ESD Protection Rating
Validation required
Parts at a glance
Part B
ADM211ARS
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6548 PCS
- Package
- SSOP-28
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
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 | ADM211ARS | Why it matters |
|---|---|---|---|
| ESD Protection (IEC 61000-4-2) | ±15 kV (air gap and contact) | Not specified / standard | The "E" suffix denotes enhanced ESD protection, which is critical for robust RS-232 interfaces exposed to external connectors and handling. |
| Number of Drivers/Receivers | 4 drivers / 5 receivers | 4 drivers / 5 receivers | Determines how many RS-232 signal lines can be driven and received; must match the system's serial port requirements. |
| Data Rate | 120 kbps | 120 kbps | Sets the maximum serial communication speed supported by the transceiver. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Must match the system power rail; both operate from a single 5 V supply. |
| Package / Mounting | 28-lead SSOP (surface mount) | 28-lead SSOP (surface mount) | Footprint and mounting style must be compatible for board-level substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental range in which the device is guaranteed to operate reliably. |
| Charge Pump / Capacitors | On-chip charge pump, external capacitors required | On-chip charge pump, external capacitors required | The internal charge pump generates RS-232 voltage levels from a single 5 V supply; external capacitor count affects board layout. |
| Manufacturer Part Suffix Meaning | "E" = enhanced ESD; "Z" = lead-free/RoHS | Standard ESD; non-Z (leaded) variant | The suffix differences indicate ESD robustness and RoHS compliance, which affect reliability and regulatory compliance for substitution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM211EARSZ | ADM211ARS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 4/5 | 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 |
Frequently asked questions
What are the key differences between the ADM211EARSZ and the ADM211ARS?
The ADM211EARSZ is the RoHS-compliant, lead-free (Pb-free) version of the ADM211ARS. Both are RS-232 line drivers/receivers in a 28-lead SSOP package with the same electrical functionality, but the ADM211EARSZ carries the "E" suffix indicating compliance with RoHS/lead-free requirements, while the ADM211ARS is the older non-RoHS leaded variant.
Are the ADM211EARSZ and ADM211ARS functionally interchangeable?
Yes, from an electrical and functional standpoint both devices are RS-232 transceivers with the same pinout in a 28-lead SSOP package and equivalent driver/receiver specifications. The primary distinction is the RoHS/lead-free construction of the ADM211EARSZ versus the leaded construction of the ADM211ARS, so substitution depends on the assembly's compliance requirements.
What is the package type for both the ADM211EARSZ and ADM211ARS?
Both devices are supplied in a 28-lead SSOP (Shrink Small Outline Package), designated by the "RS" suffix in the part number. The "Z" suffix on the ADM211EARSZ denotes the lead-free/RoHS-compliant package finish.
Do both parts support the same RS-232 data rate and supply voltage?
Yes, both the ADM211EARSZ and ADM211ARS are specified for 5 V single-supply operation and support RS-232 data rates up to 120 kbps, consistent with the Analog Devices ADM2xxE family datasheet specifications. They share the same driver output swing and receiver input thresholds.
Which part should be selected for a RoHS-compliant design?
The ADM211EARSZ should be selected for RoHS-compliant designs because its "Z" suffix indicates a lead-free, RoHS-compliant package finish. The ADM211ARS uses a leaded finish and is not suitable where RoHS compliance is mandated.
Can the ADM211EARSZ be used as a drop-in replacement for the ADM211ARS on an existing PCB?
Yes, since both parts share the same 28-lead SSOP footprint and pinout, the ADM211EARSZ can be used as a drop-in replacement for the ADM211ARS on an existing PCB. The only consideration is that the lead-free finish of the ADM211EARSZ may require adjustment of the soldering profile to meet higher reflow temperatures.
Do both devices include the same number of drivers and receivers?
Yes, both the ADM211EARSZ and ADM211ARS integrate the same configuration of RS-232 drivers and receivers as defined by the ADM211 family, providing the same channel count and interface capability. Refer to the Analog Devices ADM2xxE datasheet for the exact driver/receiver count and pin assignments.