ISL4241EIRZ-T - 3/5 RS-232 Transceiver, ±15kV ESD, 32-QFN | Renesas
部品番号: ISL4241EIRZ-T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: ISL4241EIRZ-T — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ISL4241EIRZ-T （同一形状・フットプリント） — 相違点: ESD Protection (RS-232 pins), Function, Data Rate, Package, Charge Pump Capacitors.
クイック比較ツール — 並列比較する代替部品を選択:
ISL4241EIRZ
✅ ドロップイン✓ 在庫あり
$2.91 / 個
データシートを見る →ISL4243EIRZ-T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISL4243EIRZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISL4221EIRZ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ISL3232EIRZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.04 / 個
データシートを見る →ISL4241EIRZ-T 仕様
| 機能 | 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 |
| データレート | 250 kbps (max) |
| ESD Protection (RS-232 pins) | ±15 kV (IEC61000-4-2 Air Gap and HBM) |
| シャットダウン電流 | 10 nA (typical) |
| Drivers / Receivers | 3 / 5 |
| 動作温度 | -40 °C to +85 °C (industrial) |
| パッケージ | 32-QFN (5x5 mm) with exposed pad |
| 実装タイプ | Surface Mount |
| Charge Pump Capacitors | 4 × 0.1 µF external (X7R ceramic) |
| RoHS ステータス | Compliant |
| Enable/Shutdown Pin | Yes (active-high SHDN) |
| Reception in Shutdown | Yes (per datasheet) |
ISL4241EIRZ-T ピン構成
| ピン 1 | VCC — Supply voltage (2.7V to 5.5V) |
| ピン 2 | C1+ — Charge-pump flying capacitor 1 positive |
| ピン 3 | V+ — Charge-pump +5.5V reservoir |
| ピン 4 | C1- — Charge-pump flying capacitor 1 negative |
| ピン 5 | C2+ — Charge-pump flying capacitor 2 positive |
| ピン 6 | C2- — Charge-pump flying capacitor 2 negative |
| ピン 7 | V- — Charge-pump -5.5V reservoir |
| ピン 8 | SHDN — Active-high shutdown (logic input) |
| ピン 9 | R5IN — RS-232 receiver 5 input |
| ピン 10 | R5OUT — Logic-level receiver 5 output |
| ピン 11 | R4IN — RS-232 receiver 4 input |
| ピン 12 | R4OUT — Logic-level receiver 4 output |
| ピン 13 | R3IN — RS-232 receiver 3 input |
| ピン 14 | R3OUT — Logic-level receiver 3 output |
| ピン 15 | R2IN — RS-232 receiver 2 input |
| ピン 16 | R2OUT — Logic-level receiver 2 output |
| ピン 17 | R1IN — RS-232 receiver 1 input |
| ピン 18 | R1OUT — Logic-level receiver 1 output |
| ピン 19 | GND — Ground |
| ピン 20 | T1OUT — RS-232 driver 1 output |
| ピン 21 | T2OUT — RS-232 driver 2 output |
| ピン 22 | T3OUT — RS-232 driver 3 output |
| ピン 23 | T3IN — Logic-level driver 3 input |
| ピン 24 | T2IN — Logic-level driver 2 input |
| ピン 25 | T1IN — Logic-level driver 1 input |
| ピン 26 | NC — Not connected (per datasheet) |
| ピン 27 | NC — Not connected (per datasheet) |
| ピン 28 | NC — Not connected (per datasheet) |
| ピン 29 | NC — Not connected (per datasheet) |
| ピン 30 | NC — Not connected (per datasheet) |
| ピン 31 | NC — Not connected (per datasheet) |
| ピン 32 | EP — Exposed thermal pad (connect to GND) |
主な用途
ISL4241EIRZ-T の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ISL4241EIRZ-T — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 3 drivers / 5 receivers in same QFN-32 （vs ISL4221EIRZ)
- Active-high shutdown for MCU-friendly control （vs ISL4243EIRZ-T)
- Single 3.3V supply eliminates ±12V rails （vs MAX3243EEUI (cross-vendor reference))
設計ノート
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.
コンプライアンス情報
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.
