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Analog Devices AD231AN — Analog & Data Acquisition

AD231AN RS232 Transceiver, 2/2 Driver/Receiver, 14-DIP

MPNAD231AN
End of Life

Analog Devices AD231AN RS232 transceiver, full-duplex, 2/2 driver/receiver, 14-DIP (0.300", 7.62mm) through-hole package, 4.5V~5.5V / 7.5V~13.2V supply, -40°C to 85°C.

$1.47Ref. price · indicative, final on quote
Analog Devices AD231AN datasheet (PDF)
Packaging14-DIP (0.300", 7.62mm)
RoHSRoHS non-compliant
SeriesAD231
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

AD231AN specifications
ParameterValue
TypeTransceiver
SeriesAD231
MountingThrough Hole
Voltage4.5V ~ 5.5V, 7.5V ~ 13.2V
ProtocolRS232
Operating temperature-40°C ~ 85°C
DuplexFull
PackageBulk
Case14-DIP (0.300\", 7.62mm)
Receiver hysteresis500 mV
Number of drivers (Receivers)2/2

Product details

Receiver hysteresis and noise margin

The AD231AN: The receiver hysteresis is specified at 500 mV, meaning the input threshold has a 500 mV deadband between the rising and falling trip points — this rejects noise on long RS-232 cable runs better than the 400 mV hysteresis on the ADM222ANZ peer. In a noisy factory environment, that extra 100 mV of hysteresis translates to fewer false start bits on a 19.2 kbps or 115.2 kbps UART link, especially when the cable is routed near motor drives or VFDs.

Active lifecycle and compliance note

RoHS compliance is marked as non-compliant, so this is a lead-bearing (tin-lead) part. For legacy BOMs that require a tin-lead finish for solder-joint reliability or exemption status, this is the correct order code. For RoHS-required builds, a lead-free equivalent would need to be sourced separately.

Frequently asked questions

Where can I buy AD231AN and get a quote?

The AD231AN is sourced to order through independent and authorized distribution. No stock-holding claim is made on this listing.

Is AD231AN a direct drop-in replacement for ADM222ANZ?

Both are 2/2 driver/receiver RS-232 transceivers in a 14-DIP package with the same pinout footprint. The AD231AN has 500 mV receiver hysteresis versus 400 mV on the ADM222ANZ, giving it slightly better noise margin on the receive side. The supply voltage ranges and temperature grade are functionally identical. It will drop into a board designed for the ADM222ANZ without rewiring.

What compliance documentation is available for AD231AN?

The part is RoHS non-compliant (legacy tin-lead finish). No REACH, UL, or IEC certification is listed in the manufacturer's standard documentation for this order code. The standard datasheet from Analog Devices covers electrical specifications and recommended operating conditions.