ADM3202ARNZ - 3.3V RS-232 2/2 Transceiver | Analog Devices (Tape & Reel)
料号： ADM3202ARNZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADM3202ARNZ 概述
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.
直接替换替代料： ADM3202ARNZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADM3202ARNZ （相同外形与封装尺寸） ——差异在于 Charge Pump Capacitors, Data Rate, Package, RoHS Status, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
ST3232EBDR
✅ 直接替换✓ 有现货
$0.75 / 个
查看数据手册 →ICL3232ECBZ
✅ 直接替换📋 参考替代料（不在目录中）
MAX3232EIDR
✅ 直接替换📋 参考替代料（不在目录中）
ADM3202ARNZ 规格参数
| 功能 | RS-232 Transceiver |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Protocol | RS-232 / V.28 |
| 数据速率 | 460 kbps |
| 电源电压 | 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) |
| 封装 | 16-SOIC (0.154 in, 3.90 mm width), SOIC_N |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel |
| Duplex | Full Duplex |
| Receiver Input Pull-ups | Internal |
| RoHS 状态 | Compliant (Z suffix = RoHS-compliant lead-free finish) |
| Product Family | ADM3202 / ADM3222 / ADM1385 |
ADM3202ARNZ 引脚配置
| 引脚 1 | C1+ — Charge pump flying capacitor 1 positive terminal |
| 引脚 2 | V+ — Charge pump positive rail (doubled supply), external reservoir capacitor |
| 引脚 3 | C1- — Charge pump flying capacitor 1 negative terminal |
| 引脚 4 | C2+ — Charge pump flying capacitor 2 positive terminal |
| 引脚 5 | C2- — Charge pump flying capacitor 2 negative terminal |
| 引脚 6 | V- — Charge pump negative rail (inverted supply), external reservoir capacitor |
| 引脚 7 | T2OUT — RS-232 output of transmitter 2 |
| 引脚 8 | R2IN — RS-232 input of receiver 2 |
| 引脚 9 | R2OUT — Logic-level (TTL/CMOS) output of receiver 2 |
| 引脚 10 | T2IN — Logic-level input of transmitter 2 |
| 引脚 11 | T1IN — Logic-level input of transmitter 1 |
| 引脚 12 | R1OUT — Logic-level (TTL/CMOS) output of receiver 1 |
| 引脚 13 | R1IN — RS-232 input of receiver 1 |
| 引脚 14 | T1OUT — RS-232 output of transmitter 1 |
| 引脚 15 | GND — Ground |
| 引脚 16 | VCC — Supply voltage, 3 V to 5.5 V (nominal 3.3 V) |
典型应用
ADM3202ARNZ 适用于 6 应用s: 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 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.
推荐
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 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.
推荐
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 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.
推荐
Battery-Powered Portable Instruments
Handheld measurement and data-logging instruments need a serial link for data offload without wasting battery capacity. The ADM3202ARNZ 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.
推荐
Networking and Telecom Equipment
Routers, switches, base station controllers, and telecom shelves use RS-232 craft ports for local configuration and diagnostics. The ADM3202ARNZ 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.
推荐
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 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.
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推荐产品汇总
工程参考数据： ADM3202ARNZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Highest data rate in its drop-in class （对比 ST3232EBDR)
- Guaranteed EIA-232E/V.28 conformance on a 3.3 V single supply （对比 MAX3232EIDR)
- Trade-off: no shutdown pin （对比 ADM3222 / ICL3232ECBZ)
设计说明
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, 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.
合规信息
Z suffix in ADM3202ARNZ denotes the RoHS-compliant lead-free version. REACH, halogen-free, and conflict minerals status should be confirmed on the Analog Devices compliance portal.
