ISL4241EIRZ-T - 3/5 RS-232 Transceiver, ±15kV ESD, 32-QFN | Renesas
料号： ISL4241EIRZ-T ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.62 | $36.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.48 | $1,240.00 |
| 1,000 | $2.12 | $2,120.00 |
| 3,000 | $1.78 | $5,340.00 |
ISL4241EIRZ-T 概述
What is an RS-232 transceiver? An RS-232 transceiver (also called a line driver/receiver) is an interface IC that translates logic-level UART signals (typically 0V/3.3V or 0V/5V CMOS/TTL) into the higher-voltage, inverted bipolar signals required by the EIA/TIA-232 and V.28/V.24 standards used for legacy serial ports. It belongs to the broader family of line drivers/receivers, which sits within interface ICs in the power management and signal-chain hierarchy. By integrating charge-pump voltage doublers/inverters and multiple drivers and receivers in a single chip, these devices replace legacy discrete designs built from op-amps, transistors, and DC-DC converters.
Key features of the ISL4241EIRZ-T include a 3-transmitter/5-receiver channel count, on-board charge pump requiring only four external 0.1 µF capacitors, automatic shutdown with 10 nA quiescent current, and a hardware-enable pin. The transceiver is guaranteed to meet RS-232 specifications even at VCC = 3.0V, which is critical for systems powered directly from lithium-ion battery stacks. The 32-QFN (5x5) package with exposed thermal pad provides low thermal resistance for handheld designs, while the surface-mount footprint simplifies high-volume assembly.
The device uses a regulated charge pump and on-chip voltage doubler/inverter to generate ±6V from a single 3.3V or 5V rail, so designers do not need a negative supply. Its drop-in compatible ISL4243E variant offers a slightly different enable logic (active-low SHDN) and complementary pinout options. ESD protection of ±15kV (HBM and Air Gap) on every RS-232 pin eliminates the need for external TVS diodes in most applications, simplifying BOM and reducing PCB area.
Typical applications include notebook and laptop docking stations, palmtop PCs and PDAs, point-of-sale terminals, industrial serial-port modules, and any 3.3V-5V microcontroller system that needs legacy DB-9 communication. The 250 kbps data rate is also adequate for many GPS receivers, barcode scanners, and embedded debug ports. When designing with the ISL4241EIRZ-T, choose low-ESR ceramic capacitors (X7R, 0.1 µF) for the charge-pump flying and reservoir capacitors and keep capacitor ground returns short and direct to the IC GND pin to minimize EMI and ensure stable RS-232 output levels across temperature.
直接替换替代料： ISL4241EIRZ-T ——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： ISL4241EIRZ-T （相同外形与封装尺寸） ——差异在于 ESD Protection (RS-232 pins), Function, Data Rate, Package, Charge Pump Capacitors.
快速对比工具——选择替代料号进行并排对比：
ISL4241EIRZ
✅ 直接替换✓ 有现货
$2.91 / 个
查看数据手册 →ISL4243EIRZ-T
✅ 直接替换📋 参考替代料（不在目录中）
ISL4243EIRZ
✅ 直接替换📋 参考替代料（不在目录中）
ISL4221EIRZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ISL3232EIRZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.04 / 个
查看数据手册 →ISL4241EIRZ-T 规格参数
| 功能 | RS-232 Transceiver (3 drivers / 5 receivers) |
| Protocol | RS-232 (EIA/TIA-232, V.28/V.24) |
| Supply Voltage (VCC) | 2.7 V to 5.5 V |
| 数据速率 | 250 kbps (max) |
| ESD Protection (RS-232 pins) | ±15 kV (IEC61000-4-2 Air Gap and HBM) |
| 关断电流 | 10 nA (typical) |
| Drivers / Receivers | 3 / 5 |
| 工作温度 | -40 °C to +85 °C (industrial) |
| 封装 | 32-QFN (5x5 mm) with exposed pad |
| 安装类型 | Surface Mount |
| Charge Pump Capacitors | 4 × 0.1 µF external (X7R ceramic) |
| RoHS 状态 | Compliant |
| Enable/Shutdown Pin | Yes (active-high SHDN) |
| Reception in Shutdown | Yes (per datasheet) |
ISL4241EIRZ-T 引脚配置
| 引脚 1 | VCC — Supply voltage (2.7V to 5.5V) |
| 引脚 2 | C1+ — Charge-pump flying capacitor 1 positive |
| 引脚 3 | V+ — Charge-pump +5.5V reservoir |
| 引脚 4 | C1- — Charge-pump flying capacitor 1 negative |
| 引脚 5 | C2+ — Charge-pump flying capacitor 2 positive |
| 引脚 6 | C2- — Charge-pump flying capacitor 2 negative |
| 引脚 7 | V- — Charge-pump -5.5V reservoir |
| 引脚 8 | SHDN — Active-high shutdown (logic input) |
| 引脚 9 | R5IN — RS-232 receiver 5 input |
| 引脚 10 | R5OUT — Logic-level receiver 5 output |
| 引脚 11 | R4IN — RS-232 receiver 4 input |
| 引脚 12 | R4OUT — Logic-level receiver 4 output |
| 引脚 13 | R3IN — RS-232 receiver 3 input |
| 引脚 14 | R3OUT — Logic-level receiver 3 output |
| 引脚 15 | R2IN — RS-232 receiver 2 input |
| 引脚 16 | R2OUT — Logic-level receiver 2 output |
| 引脚 17 | R1IN — RS-232 receiver 1 input |
| 引脚 18 | R1OUT — Logic-level receiver 1 output |
| 引脚 19 | GND — Ground |
| 引脚 20 | T1OUT — RS-232 driver 1 output |
| 引脚 21 | T2OUT — RS-232 driver 2 output |
| 引脚 22 | T3OUT — RS-232 driver 3 output |
| 引脚 23 | T3IN — Logic-level driver 3 input |
| 引脚 24 | T2IN — Logic-level driver 2 input |
| 引脚 25 | T1IN — Logic-level driver 1 input |
| 引脚 26 | NC — Not connected (per datasheet) |
| 引脚 27 | NC — Not connected (per datasheet) |
| 引脚 28 | NC — Not connected (per datasheet) |
| 引脚 29 | NC — Not connected (per datasheet) |
| 引脚 30 | NC — Not connected (per datasheet) |
| 引脚 31 | NC — Not connected (per datasheet) |
| 引脚 32 | EP — Exposed thermal pad (connect to GND) |
典型应用
ISL4241EIRZ-T 适用于 6 应用s: Notebook / Laptop Docking Station Serial Port, Handheld PDA / Palmtop Serial Debug Link, Industrial Point-of-Sale (POS) Terminal, GPS Receiver Module (5V UART-to-RS232 Adapter), Embedded Industrial Serial-Port Module, Medical Device Service / Programming Port.
Notebook / Laptop Docking Station Serial Port
The ISL4241EIRZ-T's 3-driver / 5-receiver channel count and ±15kV IEC61000-4-2 ESD protection on every RS-232 pin make it ideal for notebook docking-station DB-9 connectors that must survive repeated cable insertion. Its single 3.3V supply matches the laptop's main rail directly, eliminating the negative supply that legacy RS-232 designs required. With 250 kbps data rate and on-chip charge pump using four 0.1 µF X7R caps, the IC drives compliant ±5V levels into the docking connector without external DC-DC converters. The 32-QFN (5x5) footprint fits the slim geometry of docking-station PCBs.
推荐
Handheld PDA / Palmtop Serial Debug Link
The ISL4241EIRZ-T's 10 nA shutdown current and 2.7V-5.5V supply let it ride directly on a PDA or palmtop's lithium-ion battery, waking only when a service technician connects a debug cable. The 3 drivers / 5 receivers cover both the DB-9 connector and any auxiliary UART peripherals (GPS, barcode scanner, IrDA). The integrated ±15kV ESD eliminates the TVS diode array that would otherwise consume precious PCB area. Compact 32-QFN (5x5) packaging with exposed thermal pad suits the tight, thermally-constrained palmtop enclosure.
推荐
Industrial Point-of-Sale (POS) Terminal
Industrial POS terminals frequently use RS-232 to connect receipt printers, barcode scanners, and cash-drawer triggers, where electrostatic discharge from cashiers and paper-handling is a constant threat. The ISL4241EIRZ-T's ±15kV IEC61000-4-2 Air Gap rating on every RS-232 pin eliminates external TVS arrays and reduces BOM cost. The 3 drivers handle printer / scanner / drawer-kicker, while the 5 receivers accept input from scales and card-reader flow control. The industrial -40°C to +85°C operating range covers kitchen and outdoor kiosk deployments.
推荐
GPS Receiver Module (5V UART-to-RS232 Adapter)
Many GPS modules output 5V CMOS/TTL UART at 9600-115200 bps, which must be level-shifted and inverted to drive the standard ±5V RS-232 expected by marine and avionics chart-plotters. The ISL4241EIRZ-T accepts 5V logic inputs directly, and its 250 kbps data rate accommodates fast-update (10 Hz) GPS streams with significant margin. ±15kV ESD is critical for marine installations where shore-power and lightning-induced transients appear on external cables. The 32-QFN small footprint lets the adapter PCB fit inside a NMEA-0183 splice enclosure.
推荐
Embedded Industrial Serial-Port Module
Industrial PLC and HMI backplanes frequently expose isolated RS-232 ports to legacy field instruments, where space is at a premium and ESD strikes from motor coils and relay switching are routine. The ISL4241EIRZ-T's 32-QFN (5x5) package sits easily next to digital isolators on the same PCB, while ±15kV ESD protects the downstream UART from factory-floor transients. The 3/5 channel count is well-matched to a typical PLC's RS-232 expansion daughter-card. The on-chip charge pump removes the need for a ±12V isolated supply, simplifying the isolation barrier.
推荐
Medical Device Service / Programming Port
Many medical devices (blood-pressure monitors, infusion pumps, patient monitors) expose an RS-232 service / programming port for firmware update and calibration. The ISL4241EIRZ-T's industrial temperature range, ±15kV ESD protection on every RS-232 pin, and 10 nA shutdown current keep service-port leakage negligible when the device is in standby. The 3/5 channel count supports programming UART plus command / status handshaking. The 32-QFN footprint and single 3.3V supply ease integration onto medical-grade PCBs where low-noise analog rails coexist with serial interfaces.
推荐
推荐产品汇总
工程参考数据： ISL4241EIRZ-T ——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 | ISL4241EIRZ | ISL4243EIRZ-T | ISL4243EIRZ | ISL4221EIRZ | ISL3232EIRZ |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 32-QFN (5x5) | 32-QFN (5x5) - same | 32-QFN (5x5) - same | 32-QFN (5x5) - same | 32-QFN (5x5) - same | 32-QFN (5x5) - same |
| Drivers / Receivers | 3 / 5 | 3 / 5 | 3 / 5 | 3 / 5 | 1 / 1 (-67% drivers, -80% receivers) | 2 / 2 (-33% drivers, -60% receivers) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Data Rate | 250 kbps | 250 kbps | 250 kbps | 250 kbps | 250 kbps | 250 kbps |
| ESD Protection | ±15 kV (IEC61000-4-2) | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| Shutdown Pin Polarity | Active-high | Active-high | Active-low | Active-low | Active-high | Active-high |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
关键差异点
- 3 drivers / 5 receivers in same QFN-32 （对比 ISL4221EIRZ)
- Active-high shutdown for MCU-friendly control （对比 ISL4243EIRZ-T)
- Single 3.3V supply eliminates ±12V rails （对比 MAX3243EEUI (cross-vendor reference))
设计说明
Place the four charge-pump capacitors (C1, C2, V+ reservoir, V- reservoir) within 5 mm of their respective IC pins and use a solid ground pour on the top layer tied to the exposed thermal pad (EP) via multiple vias. Estimated: with 0.1 µF X7R ceramic caps, switching ripple on V+/V- stays below 100 mVpp and the charge pump remains stable from 2.7V to 5.5V VCC. Keep RS-232 driver traces short and route them away from high-speed digital signals to minimize crosstalk.
Do not omit the V- reservoir capacitor - the -5.5V charge-pump rail is generated only when C2- and V- caps are present. Also ensure SHDN is driven logic-high only after VCC is stable; pulling SHDN low at power-up may prevent charge-pump startup. The ISL4241EIRZ-T's SHDN is active-high; the ISL4243EIRZ-T variant uses active-low - swapping them is a common source of 'no comms' failures.
The charge pump operates at ~250 kHz and can radiate harmonics into nearby analog circuits. Place a 100 nF ceramic bypass cap directly between VCC and GND (within 2 mm of pin 1) and route V+/V- traces as short guarded pairs. Estimated: 100 nF X7R at VCC reduces conducted noise on the 3.3V rail by >10 dB above 10 MHz, eliminating audible buzz in nearby audio CODECs.
合规信息
RoHS and REACH compliant per Renesas product page. Not AEC-Q100 qualified - this is an industrial-grade IC. Halogen-free status not explicitly stated in datasheet; marked unknown.
