ISL4241EIRZ - 3V RS-232 3TX/5RX Transceiver, ±15kV ESD | Renesas
부품 번호: ISL4241EIRZ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.12 | $41.20 |
| 100 | $3.68 | $368.00 |
| 500 | $3.27 | $1,635.00 |
| 1,000 | $2.91 | $2,910.00 |
ISL4241EIRZ 개요
A line driver/receiver (RS-232 transceiver) is a type of interface IC that converts TTL/CMOS logic levels (0V/3.3V) on the controller side to the bipolar ±5V to ±15V signal levels required by the EIA/TIA-232 standard on the cable side. Modern RS-232 transceivers integrate one or more charge-pump DC-DC converters so they can generate the necessary RS-232 voltages from a single 3V to 5V supply, eliminating the legacy ±12V rails. They sit in the interface hierarchy: physical-layer transceiver -> serial interface IC -> wired connectivity IC, and are commonly classified under the broader category of UART/LIN/serial transceivers.
Key features include 3 transmitters and 5 receivers in a single IC (vs. the more common 3Tx/3Rx or 1Tx/1Rx), on-board charge pumps that require only four 0.1 µF external capacitors, and a SHDN pin that drops quiescent current to 10 nA for battery-powered designs. The wide supply range (2.7V–5.5V) simplifies designs migrating between 3.3V-only microcontrollers and legacy 5V systems. The QFN-32 (5x5) package with an exposed pad provides a low thermal resistance path suitable for industrial temperature ranges from -40°C to +85°C.
The ISL4241EIRZ is engineered around a regulated dual charge pump and an on-chip high-efficiency DC-DC converter that produces the positive and negative RS-232 rails from a single supply. Each transmitter is rated for ±15 kV ESD (HBM and IEC 61000-4-2 air-gap), which removes the need for external TVS diodes on the DB-9 connector. The part is targeted at PDAs, palmtops, notebook/laptop computers, and any design that requires an extra receiver for monitoring ring-indicate or carrier-detect signals without adding a second transceiver.
Typical applications include industrial point-of-sale terminals, handheld barcode scanners, embedded serial debug ports on single-board computers, RS-232 ports on industrial controllers, and any 3.3V MCU-based board that needs a rugged 5-receiver COM port. The high ESD rating also makes it well-suited to factory-floor and medical equipment that must survive human-discharge events.
When designing with this device, note that the QFN-32 EP package requires a thermal pad soldered to a ground copper pour for specified thermal performance. The four charge-pump capacitors must be low-ESR ceramic types placed within 5 mm of the IC. In shutdown mode, all transmitters and three of the receivers go to high impedance; the remaining two receivers stay active to monitor incoming handshaking signals.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical RS-232 design notes that are not consolidated in the manufacturer datasheet.
드롭인 대체품: ISL4241EIRZ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ISL4241EIRZ (동일 폼 팩터 및 풋프린트) — 차이점: Data Rate, ESD Protection (RS-232 pins), Function, Shutdown Current.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ISL4241EIRZ-T
✅ 드롭인✓ 재고 있음
$1.78 / 개
데이터시트 보기 →ISL4243EIRZ
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISL4243EIRZ-T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISL4221E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISL4241EIRZ 사양
| 기능 | RS-232 Transceiver (Line Driver/Receiver) |
| 데이터 속도 | 250 kbps |
| Supply Voltage (VCC) | 2.7 V to 5.5 V |
| Number of Transmitters | 3 |
| Number of Receivers | 5 |
| Transceiver Configuration | Full-Duplex (3Tx/5Rx) |
| ESD Protection (RS-232 pins) | ±15 kV (HBM and IEC 61000-4-2 Air Gap) |
| 셧다운 전류 | 10 nA |
| 동작 온도 범위 | -40°C to +85°C (Industrial) |
| 패키지 | 32-QFN (5x5 mm) with Exposed Pad |
| 실장 유형 | Surface Mount |
| Compliance | EIA/TIA-232, V.28/V.24 (functional down to VCC = 3.0 V) |
| External Capacitors Required | 4 × 0.1 µF ceramic charge-pump caps |
| RoHS 상태 | Compliant |
ISL4241EIRZ 핀 구성
| 핀 1 | C2+ — Charge pump capacitor 2 positive terminal |
| 핀 2 | C2- — Charge pump capacitor 2 negative terminal |
| 핀 3 | V- — Negative RS-232 supply generated by charge pump |
| 핀 4 | R1IN — Receiver 1 input (RS-232 level) |
| 핀 5 | R2IN — Receiver 2 input (RS-232 level) |
| 핀 6 | R3IN — Receiver 3 input (RS-232 level) |
| 핀 7 | R4IN — Receiver 4 input (RS-232 level) |
| 핀 8 | R5IN — Receiver 5 input (RS-232 level) |
| 핀 9 | FORCEON — Force-on logic input for charge pump |
| 핀 10 | FORCEOFF — Force-off logic input for all transmitters and 3 receivers |
| 핀 11 | INVALID — Invalid signal indicator (active low when all RS-232 inputs are valid) |
| 핀 12 | GND — Ground |
| 핀 13 | T3OUT — Transmitter 3 output (RS-232 level) |
| 핀 14 | T1OUT — Transmitter 1 output (RS-232 level) |
| 핀 15 | T2OUT — Transmitter 2 output (RS-232 level) |
| 핀 16 | VCC — Logic supply input, 2.7 V to 5.5 V |
| 핀 17 | V+ — Positive RS-232 supply generated by charge pump |
| 핀 18 | C1- — Charge pump capacitor 1 negative terminal |
| 핀 19 | C1+ — Charge pump capacitor 1 positive terminal |
| 핀 20 | SHDN — Shutdown control input (active low, 10 nA Iq) |
| 핀 21 | R1OUT — Receiver 1 output (TTL/CMOS level) |
| 핀 22 | R2OUT — Receiver 2 output (TTL/CMOS level) |
| 핀 23 | R3OUT — Receiver 3 output (TTL/CMOS level) |
| 핀 24 | R4OUT — Receiver 4 output (TTL/CMOS level) |
| 핀 25 | R5OUT — Receiver 5 output (TTL/CMOS level) |
| 핀 26 | T1IN — Transmitter 1 input (TTL/CMOS level) |
| 핀 27 | T2IN — Transmitter 2 input (TTL/CMOS level) |
| 핀 28 | T3IN — Transmitter 3 input (TTL/CMOS level) |
| 핀 29 | NC — Not connected (per datasheet) |
| 핀 30 | NC — Not connected (per datasheet) |
| 핀 31 | NC — Not connected (per datasheet) |
| 핀 32 | EP — Exposed pad - thermal and ground connection (must be soldered to PCB ground pour) |
일반적인 애플리케이션
ISL4241EIRZ 적합 용도: 6 애플리케이션s: Industrial RS-232 Serial Ports, Point-of-Sale (POS) Terminals, Embedded Debug / Console Ports, Handheld Barcode Scanners and PDAs, Medical and Laboratory Equipment, Networking and Telecom Equipment.
Industrial RS-232 Serial Ports
The ISL4241EIRZ's 3Tx/5Rx configuration and ±15 kV IEC 61000-4-2 ESD rating make it ideal for industrial serial ports on PLCs, HMIs, and motor controllers. It meets EIA/TIA-232 specifications from a single 3.3V or 5V supply, eliminating legacy ±12V rails. The 5 receivers support full hardware handshaking (RTS/CTS/DTR/DSR/DCD) plus a dedicated Ring Indicate monitor. Industrial designs benefit from the wide -40°C to +85°C operating range and the rugged QFN-32 package with exposed thermal pad for high-vibration environments.
추천
Point-of-Sale (POS) Terminals
POS terminals require a rugged RS-232 port to drive legacy peripherals (Pole Displays, cash-drawer kickers, legacy barcode scanners). The ISL4241EIRZ delivers ±15 kV ESD protection directly on the DB-9 pins, removing the need for external TVS arrays and reducing BOM cost. Its 3Tx/5Rx channel count supports typical cash-drawer + scanner + display multi-drop wiring, and the 10 nA shutdown current extends battery life on portable POS terminals between transactions.
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Embedded Debug / Console Ports
Single-board computers, routers, and industrial gateways commonly expose a UART debug console that needs to survive field technician handling and accidental shorts. The ISL4241EIRZ's 250 kbps rate covers all common console baud rates up to 230400. The 32-QFN (5x5) package saves PCB area over legacy SOIC parts, while the integrated charge pumps need only four 0.1 µF ceramic capacitors. The 3Tx/5Rx channel count provides spare receivers for monitoring modem-control signals during firmware bring-up.
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Handheld Barcode Scanners and PDAs
Handheld barcode scanners and ruggedized PDAs integrate an RS-232 port for legacy cradle communications and direct-attach to legacy host systems. The ISL4241EIRZ operates from a single 2.7V to 5.5V supply, matching the 3.7V Li-ion battery rail common in handheld designs. Its 10 nA shutdown current enables weeks of standby time, and the ±15 kV ESD rating protects against static discharge from operator handling. The compact QFN-32 (5x5) leaves room for the small PCBs typical of scanner gun form factors.
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Medical and Laboratory Equipment
Medical instruments such as patient monitors, infusion pumps, and laboratory analyzers often require isolated RS-232 ports to interface with hospital information systems. The ISL4241EIRZ's ±15 kV IEC 61000-4-2 ESD rating and industrial -40°C to +85°C temperature range support medical device EMC requirements. Its 250 kbps data rate easily handles HL7 messaging and instrument-control protocols. The 3Tx/5Rx channel count covers both data communication and hardware-flow-control signal monitoring on a single IC.
추천
Networking and Telecom Equipment
Routers, switches, and telecom line cards still expose RS-232 ports for out-of-band management and CLI access. The ISL4241EIRZ supports full hardware-flow-controlled serial links up to 250 kbps with ±15 kV ESD on the RJ-45-to-DB-9 adapter chain. The QFN-32 (5x5) footprint fits dense line-card designs, while the integrated charge pumps eliminate the need for ±12V rails that don't exist in modern 3.3V/5V telecom backplanes. Renesas' long-term product support also suits 10+ year telecom product cycles.
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추천 제품 요약
엔지니어링 참조 데이터: ISL4241EIRZ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ISL4241EIRZ-T | ISL4243EIRZ | ISL4243EIRZ-T | ISL4221E |
|---|---|---|---|---|---|
| Brand | 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 |
| Function | RS-232 3Tx/5Rx Transceiver | RS-232 3Tx/5Rx Transceiver | RS-232 1Tx/5Rx Transceiver | RS-232 1Tx/5Rx Transceiver | RS-232 2Tx/2Rx Transceiver |
| 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 |
| Data Rate | 250 kbps | 250 kbps | 250 kbps | 250 kbps | 250 kbps |
| ESD Protection | ±15 kV (HBM, IEC 61000-4-2) | ±15 kV (HBM, IEC 61000-4-2) | ±15 kV (HBM, IEC 61000-4-2) | ±15 kV (HBM, IEC 61000-4-2) | ±15 kV (HBM, IEC 61000-4-2) |
| Shutdown Current | 10 nA | 10 nA | 10 nA | 10 nA | 10 nA |
| Packaging Format | Tray | Tape & Reel | Tray | Tape & Reel | Tray |
주요 차별점
- 3Tx/5Rx configuration in single IC (vs ISL4221E (2Tx/2Rx))
- Same-channel-count drop-in on tape-and-reel (vs ISL4241EIRZ-T)
- 5-receiver capability with 3 transmitters (vs ISL4243EIRZ (1Tx/5Rx))
설계 노트
The QFN-32 package has an exposed thermal pad (EP) that MUST be soldered to a PCB ground copper pour for specified thermal and EMI performance. Use at least 8 thermal via holes in the EP land pattern connecting top-side copper to an inner ground plane. Without proper EP soldering, junction temperature can exceed 125°C under normal load and the part may behave erratically during high-current transmitter switching.
The four charge-pump capacitors (C1, C2 and the associated C1+/C1-/C2+/C2- pins) must be 0.1 µF low-ESR ceramic types placed within 5 mm of their respective IC pins. Use X7R or X5R dielectric, not Y5V or Z5U, which lose capacitance with bias voltage. Long trace runs to the charge-pump capacitors cause excessive ripple on V+ and V- and can fail EIA/TIA-232 driver output swing requirements at cold temperature.
Do not leave the FORCEOFF, FORCEON, SHDN, or INVALID pins floating. Tie FORCEOFF and FORCEON high through a 100 kΩ pull-up to VCC for always-on operation, or tie SHDN high to enable the device. Floating logic inputs can pick up noise and randomly disable the transmitters or receivers. In shutdown mode, three of the five receivers (R1IN-R3IN) go to high-Z; if your application needs them active during shutdown, choose a different transceiver such as the ISL4243E.
The on-chip charge pump operates at ~250 kHz to ~500 kHz and can radiate EMI near sensitive analog circuits. Place the ISL4241EIRZ at least 10 mm away from RF or precision-ADC sections, and route the C1/C2 capacitor traces on an inner layer or use guard traces tied to ground. The ±15 kV ESD protection eliminates the need for external TVS diodes, but a small ferrite bead on each RS-232 output helps attenuate common-mode emissions above 100 MHz.
규정 준수 정보
RoHS and REACH compliant per Renesas product page. The ISL4241EIRZ is an industrial-grade (not automotive-qualified) part; AEC-Q100 is not applicable. Halogen-free status not explicitly stated in available data.
