ADM3202ARNZ-REEL - 3.3V RS-232 2/2 Transceiver | Analog Devices
MPN: ADM3202ARNZ-REEL β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADM3202ARNZ-REEL Overview
An RS-232 transceiver is an interface IC that converts logic-level UART signals (TTL/CMOS, typically 0 V to 3.3 V) into the wider voltage swings specified by the EIA-232E and CCITT V.28 standards, and vice versa. Within the signal chain hierarchy, it belongs to the transceiver class of drivers/receivers under Interface ICs, bridging microcontrollers, processors, or UARTs to legacy serial ports, industrial equipment, and point-of-sale hardware.
Key features include single-supply 3.3 V operation with an on-chip charge pump voltage doubler/inverter, conformance to EIA-232E and V.28 specifications, high-speed operation up to 460 kbps, and small 0.1 uF external charge pump capacitors that reduce board area and bill-of-materials cost compared to older parts requiring 1 uF or larger capacitors.
Technically, the ADM3202 integrates two charge pump stages (doubler and inverter) to generate approximately +/-6 V RS-232 rails from the 3.3 V supply. The drivers deliver guaranteed EIA-232E output levels, and the receivers include internal input pull-ups so that unconnected receiver inputs default to a known mark state. The ADM3202 variant has no shutdown pin; the related ADM3222 and ADM1385 add a low-power shutdown facility for battery applications.
Typical applications include industrial equipment serial ports, embedded systems with RS-232 debug or console links, point-of-sale terminals, battery-powered portable instrumentation (with ADM3222 variants), and any 3.3 V microcontroller design interfacing to legacy RS-232 equipment.
Design considerations: place the four 0.1 uF charge pump capacitors as close as possible to the device pins and observe datasheet polarity for the flying capacitors; ensure the supply can support the transient charge pump current during data transmission.
This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in a single manufacturer datasheet, as of 2026-09-13.
Drop-in alternatives for ADM3202ARNZ-REEL β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADM3202ARNZ-REEL (same form factor and footprint) β differing in Charge Pump Capacitors, Data Rate, Package, RoHS Status, Supply Voltage.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADM3202ARNZ
β Drop-Inπ Reference alternative (not in catalog)
ST3232EBDR
β Drop-Inβ In Stock
$0.75 / Unit
View Datasheet βICL3232ECBZ
β Drop-Inπ Reference alternative (not in catalog)
MAX3232EIDR
β Drop-Inπ Reference alternative (not in catalog)
ADM3202ARNZ-REEL Specifications
| Function | RS-232 Transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Protocol | RS-232 / V.28 |
| Data Rate | 460 kbps |
| Supply Voltage | 3 V to 5.5 V (single supply, nominal 3.3 V) |
| Charge Pump Capacitors | 4 x 0.1 uF external |
| Standards Conformance | EIA-232E and CCITT V.28 |
| Shutdown Feature | No (available on ADM3222/ADM1385 variants) |
| Package | 16-SOIC (0.154 in, 3.90 mm width), SOIC_N |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel |
| Duplex | Full Duplex |
| Receiver Input Pull-ups | Internal |
| RoHS Status | Compliant (Z suffix = RoHS-compliant lead-free finish) |
| Product Family | ADM3202 / ADM3222 / ADM1385 |
ADM3202ARNZ-REEL Pin Configuration
| Pin 1 | C1+ β Charge pump flying capacitor 1 positive terminal |
| Pin 2 | V+ β Charge pump positive rail (doubled supply), external reservoir capacitor |
| Pin 3 | C1- β Charge pump flying capacitor 1 negative terminal |
| Pin 4 | C2+ β Charge pump flying capacitor 2 positive terminal |
| Pin 5 | C2- β Charge pump flying capacitor 2 negative terminal |
| Pin 6 | V- β Charge pump negative rail (inverted supply), external reservoir capacitor |
| Pin 7 | T2OUT β RS-232 output of transmitter 2 |
| Pin 8 | R2IN β RS-232 input of receiver 2 |
| Pin 9 | R2OUT β Logic-level (TTL/CMOS) output of receiver 2 |
| Pin 10 | T2IN β Logic-level input of transmitter 2 |
| Pin 11 | T1IN β Logic-level input of transmitter 1 |
| Pin 12 | R1OUT β Logic-level (TTL/CMOS) output of receiver 1 |
| Pin 13 | R1IN β RS-232 input of receiver 1 |
| Pin 14 | T1OUT β RS-232 output of transmitter 1 |
| Pin 15 | GND β Ground |
| Pin 16 | VCC β Supply voltage, 3 V to 5.5 V (nominal 3.3 V) |
Typical Applications
ADM3202ARNZ-REEL is suitable for 6 applications: Industrial Equipment Serial Ports, Embedded Debug and Console Interfaces, Point-of-Sale and Retail Terminals, Battery-Powered Portable Instruments, Networking and Telecom Equipment, Medical Device Service Interfaces.
Industrial Equipment Serial Ports
Factory equipment, PLCs, motor drives, and instrumentation panels still expose RS-232 service and configuration ports. The ADM3202ARNZ-REEL fits this role because it operates from the 3.3 V rail already present in modern microcontroller designs, eliminating the +/-12 V rails older transceivers demanded, and it meets EIA-232E/V.28 signal levels required for reliable communication over cable runs. Its 460 kbps data rate comfortably covers console speeds up to 115.2 kbps and faster industrial protocols. With only four 0.1 uF charge pump capacitors required, board area and BOM cost stay low. Placed between the MCU UART TX/RX and the DB9 connector, the device's receiver input pull-ups guarantee a defined mark state if the cable is disconnected, avoiding spurious received bytes.
Recommended
Embedded Debug and Console Interfaces
Embedded Linux boards, network appliances, and test fixtures commonly use an RS-232 console header for low-level debugging. The ADM3202ARNZ-REEL converts the processor's 3.3 V UART to EIA-232 levels in a compact 16-lead SOIC footprint. Because the device tolerates a 3 V to 5.5 V supply, it can share either the 3.3 V core rail or a 5 V auxiliary rail, simplifying power distribution. The 460 kbps capability allows high-throughput console logging and kernel dump transfer at 460.8 kbps, well beyond classic 115.2 kbps. Four 0.1 uF ceramic capacitors keep the charge pump quiet and small; 0.1 uF X7R parts are standard, cheap components. Reverse protection is not included, so series current limiting on the DB9 line is recommended in field-serviceable debug ports where miswiring can occur.
Recommended
Point-of-Sale and Retail Terminals
Receipt printers, barcode scanners, cash drawers, and POS controllers frequently retain RS-232 ports for peripheral interconnection. The ADM3202ARNZ-REEL is well matched: single 3.3 V operation aligns with modern controller boards, and the guaranteed EIA-232E output levels ensure compatibility with legacy peripherals designed to older V.28 drive requirements. Full-duplex 2-driver/2-receiver support covers TX, RX, and auxiliary handshaking-style lines. The tape-and-reel packaging suits automated pick-and-place production runs typical of retail terminal manufacturing. Designers should place the four 0.1 uF charge pump capacitors directly at the device pins and add a bulk 1 uF reservoir on the 3.3 V rail, as charge pump switching draws transient current bursts during transmission bursts.
Recommended
Battery-Powered Portable Instruments
Handheld measurement and data-logging instruments need a serial link for data offload without wasting battery capacity. The ADM3202ARNZ-REEL is a low-power member of the ADI 3.3 V RS-232 family, but the ADM3202 variant has no shutdown pin. For designs where the port stays connected and active, the ADM3202's low quiescent consumption is adequate; for duty-cycled ports, the family's ADM3222 or ADM1385 variants add low-power shutdown per the Analog Devices datasheet and are the preferred fit. The 3 V to 5.5 V supply range directly supports lithium-ion battery rails through an LDO, and the small 0.1 uF charge pump capacitors save space on dense handheld PCBs. The 16-SOIC package provides adequate thermal margin at RS-232 signal-current levels, so no heatsinking is required.
Recommended
Networking and Telecom Equipment
Routers, switches, base station controllers, and telecom shelves use RS-232 craft ports for local configuration and diagnostics. The ADM3202ARNZ-REEL suits these ports because its 460 kbps rate supports fast log streaming, its EIA-232E/V.28 conformance guarantees interoperability with maintenance laptops using USB-to-serial adapters, and the 3.3 V single supply matches the logic rail on modern control cards. The receiver internal pull-ups prevent undefined inputs when the craft cable is unplugged, avoiding log corruption. Designers should note the charge pump radiates switching components near 200 kHz-class frequencies; a solid ground plane and 0.1 uF capacitors placed within a few millimeters of pins 1-6 minimize EMI on adjacent backplane lines. Tape-and-reel delivery supports the high volumes typical of networking hardware production.
Recommended
Medical Device Service Interfaces
Diagnostic equipment, patient-monitoring peripherals, and laboratory analyzers frequently retain RS-232 service ports for calibration and firmware maintenance, even when the main data path is USB or Ethernet. The ADM3202ARNZ-REEL fits these ports with its 3.3 V single supply, guaranteed EIA-232E levels, and 460 kbps throughput for fast log and calibration-data transfer. The RoHS-compliant (Z-suffix) lead-free construction supports medical device environmental compliance programs. Isolation is not integrated, so designs requiring patient-applied-part isolation should pair the transceiver with a digital isolator or optocoupler barrier on the logic side, keeping the RS-232 side on the isolated domain. The four 0.1 uF charge pump capacitors should be C0G or X7R types for stable operation across the sterilization-adjacent temperature range of clinical environments.
Recommended
Recommended Products Summary
Engineering reference data for ADM3202ARNZ-REEL β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM3202ARNZ | ST3232EBDR | ICL3232ECBZ | MAX3232EIDR |
|---|---|---|---|---|---|
| Package | 16-SOIC (SOIC_N, 3.90 mm) | 16-SOIC (SOIC_N) - same | 16-SOIC - same footprint | 16-SOIC - same footprint | 16-SOIC - same footprint |
| Brand | Analog Devices | Analog Devices | STMicroelectronics | Renesas Electronics (Intersil) | Analog Devices (Maxim Integrated) |
| Drivers / Receivers | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 |
| Supply Voltage | 3 V to 5.5 V (single) | 3 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Data Rate | 460 kbps | 460 kbps | 250 kbps (EB version class) | 250 kbps | 250 kbps |
| Charge Pump Capacitors | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF | 4 x 0.1 uF |
| Standards Conformance | EIA-232E / CCITT V.28 | EIA-232E / V.28 | EIA/TIA-232E / V.28 / V.24 | EIA/TIA-232E / V.28 / V.24 | EIA/TIA-232E / V.28 / V.24 |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Highest data rate in its drop-in class (vs ST3232EBDR)
- Guaranteed EIA-232E/V.28 conformance on a 3.3 V single supply (vs MAX3232EIDR)
- Trade-off: no shutdown pin (vs ADM3222 / ICL3232ECBZ)
Design Notes
Place the four 0.1 uF charge pump flying and reservoir capacitors within a few millimeters of pins 1 through 6, following the polarity shown in the Analog Devices datasheet application circuit. X7R or C0G 0.1 uF ceramic capacitors rated at 16 V or more are recommended. Add a bulk reservoir capacitor (approximately 1 uF to 10 uF) on the 3.3 V supply near the device, since the charge pump draws transient current bursts on each transmitter output transition.
The charge pump switching frequency generates spectral components that can couple into nearby analog circuitry. Use an uninterrupted ground plane under the ADM3202ARNZ-REEL, route the V+ and V- charge pump traces short and wide, and avoid routing the charge pump nodes adjacent to sensitive analog signals. This is especially important in industrial panels where the RS-232 transceiver may sit near ADC front ends or precision references.
The ADM3202 has no shutdown or enable pin - if your design needs a controlled power-down of the transceiver for battery life, select the ADM3222 or ADM1385 family variants instead. Also note the part tolerates 3 V to 5.5 V but must not be powered while RS-232 lines from an external port are driving it with the supply absent; check the datasheet absolute maximum ratings for receiver input voltage with VCC = 0 V. Receiver input internal pull-ups mean unused receiver inputs default to mark - do not rely on external pull-ups unless level shifting is intended.
Estimated: charge pump conversion from 3.3 V to approximately +/-6 V rails means the supply must deliver roughly twice the transmitter load power during simultaneous dual-transmitter switching. For two EIA-232 loads at 460 kbps, budget several tens of milliamps of transient current on the 3.3 V rail; verify your rail's decoupling and regulator transient response rather than sizing only for the quiescent current figure.
Compliance Information
Z suffix in ADM3202ARNZ-REEL denotes the RoHS-compliant lead-free version. REACH, halogen-free, and conflict minerals status should be confirmed on the Analog Devices compliance portal.
