ISL4241EIRZ - 3V RS-232 3TX/5RX Transceiver, ±15kV ESD | Renesas
Référence : ISL4241EIRZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour ISL4241EIRZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ISL4241EIRZ (même facteur de forme et même empreinte) — différant par Data Rate, ESD Protection (RS-232 pins), Function, Shutdown Current.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ISL4241EIRZ-T
✅ Remplacement direct✓ En stock
$1.78 / unité
Voir la fiche technique →ISL4243EIRZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL4243EIRZ-T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL4221E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL4241EIRZ Spécifications
| Fonction | RS-232 Transceiver (Line Driver/Receiver) |
| Débit de données | 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) |
| Courant d'arrêt | 10 nA |
| Plage de température de fonctionnement | -40°C to +85°C (Industrial) |
| Boîtier | 32-QFN (5x5 mm) with Exposed Pad |
| Type de montage | 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 |
| Statut RoHS | Compliant |
Configuration des broches de ISL4241EIRZ
| Broche 1 | C2+ — Charge pump capacitor 2 positive terminal |
| Broche 2 | C2- — Charge pump capacitor 2 negative terminal |
| Broche 3 | V- — Negative RS-232 supply generated by charge pump |
| Broche 4 | R1IN — Receiver 1 input (RS-232 level) |
| Broche 5 | R2IN — Receiver 2 input (RS-232 level) |
| Broche 6 | R3IN — Receiver 3 input (RS-232 level) |
| Broche 7 | R4IN — Receiver 4 input (RS-232 level) |
| Broche 8 | R5IN — Receiver 5 input (RS-232 level) |
| Broche 9 | FORCEON — Force-on logic input for charge pump |
| Broche 10 | FORCEOFF — Force-off logic input for all transmitters and 3 receivers |
| Broche 11 | INVALID — Invalid signal indicator (active low when all RS-232 inputs are valid) |
| Broche 12 | GND — Ground |
| Broche 13 | T3OUT — Transmitter 3 output (RS-232 level) |
| Broche 14 | T1OUT — Transmitter 1 output (RS-232 level) |
| Broche 15 | T2OUT — Transmitter 2 output (RS-232 level) |
| Broche 16 | VCC — Logic supply input, 2.7 V to 5.5 V |
| Broche 17 | V+ — Positive RS-232 supply generated by charge pump |
| Broche 18 | C1- — Charge pump capacitor 1 negative terminal |
| Broche 19 | C1+ — Charge pump capacitor 1 positive terminal |
| Broche 20 | SHDN — Shutdown control input (active low, 10 nA Iq) |
| Broche 21 | R1OUT — Receiver 1 output (TTL/CMOS level) |
| Broche 22 | R2OUT — Receiver 2 output (TTL/CMOS level) |
| Broche 23 | R3OUT — Receiver 3 output (TTL/CMOS level) |
| Broche 24 | R4OUT — Receiver 4 output (TTL/CMOS level) |
| Broche 25 | R5OUT — Receiver 5 output (TTL/CMOS level) |
| Broche 26 | T1IN — Transmitter 1 input (TTL/CMOS level) |
| Broche 27 | T2IN — Transmitter 2 input (TTL/CMOS level) |
| Broche 28 | T3IN — Transmitter 3 input (TTL/CMOS level) |
| Broche 29 | NC — Not connected (per datasheet) |
| Broche 30 | NC — Not connected (per datasheet) |
| Broche 31 | NC — Not connected (per datasheet) |
| Broche 32 | EP — Exposed pad - thermal and ground connection (must be soldered to PCB ground pour) |
Applications typiques
ISL4241EIRZ convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISL4241EIRZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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))
Notes de conception
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.
Informations de conformité
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.
