TRSF3243EIRHBR Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
TRSF3243EIRHBR is a 3-driver EIA-232/TIA-232 RS-232 line transceiver by Texas Instruments with Schmitt-trigger inputs and a 1 µA maximum high-level input current. Key specs: 32-pin QFN package, RoHS e4, charge-pump integrated. From $2.10, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- TRSF3243EIRHBR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.7038(MOQ 100)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3-driver RS-232 transceiver compliant with EIA-232 and TIA-232 standards supporting data rates typically up to 1 Mbps for legacy serial port interfaces
- Schmitt-trigger inputs with 1 µA maximum high-level input current provide noise immunity on long serial cable runs up to 15 m
- Compact 32-pin QFN package with integrated charge pump eliminates external voltage doublers, reducing solution area and component count by 4 to 6 parts
Applications
TRSF3243EIRHBR is used in industrial PLC serial communication ports, medical device serial interfaces, and test-and-measurement equipment requiring EIA-232 voltage-level translation from 3.3 V or 5 V logic. Its charge-pump integration suits space-constrained handheld terminals and embedded systems where a separate RS-232 DC/DC converter cannot be accommodated. The part also serves legacy serial port expansion cards and embedded gateway devices bridging modern microcontrollers to RS-232 host systems.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Differential Output | NO |
| Driver Number of Bits | 3 |
| High Level Input Current-Max | 0.000001A |
| Input Characteristics | SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-232; TIA-232 |
| JESD-30 Code | S-PQCC-N32 |
| JESD-609 Code | e4 |
| Number of Functions | 3 |
| Out Swing-Min | 10V |
| Output Low Current-Max | 0.0016A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC32,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Receive Delay-Max | 150ns |
| Receiver Number of Bits | 5 |
| Supply Current-Max | 1.2mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Supply Voltage1-Max | 3.6V |
| Supply Voltage1-Min | 3V |
| Supply Voltage1-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 150ns |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What data rate can TRSF3243EIRHBR sustain on a 15 m RS-232 cable, and what limits it?
TRSF3243EIRHBR sustains RS-232 data rates up to approximately 120 kbps on a 15 m cable, limited by the 2500 pF total cable capacitance specified by EIA-232. At shorter cable lengths below 5 m, the transceiver can reach 1 Mbps with reduced load capacitance. The Schmitt-trigger inputs reject common-mode noise up to ±25 V, ensuring reliable reception even when the cable picks up 50 Hz or 60 Hz interference from nearby power wiring.
How does the integrated charge pump in TRSF3243EIRHBR simplify PCB design for a 3.3 V embedded system?
TRSF3243EIRHBR's internal charge pump generates the ±5 V to ±15 V RS-232 output swings required by EIA-232 directly from a 3.3 V supply using only 4 external 100 nF to 470 nF ceramic capacitors. This eliminates the need for a separate DC/DC converter or charge-pump IC that would otherwise add 8 mm² to 12 mm² of PCB area, simplifying layout and meeting the 1 µA maximum high-level input current budget without additional clamping components.
How does TRSF3243EIRHBR's 3-driver configuration compare to a 2-driver RS-232 IC for a PLC with multiple serial ports?
TRSF3243EIRHBR's 3-driver and 5-receiver configuration supports three simultaneous RS-232 transmit channels from a single 32-pin QFN, whereas a 2-driver device would require 1.5× the ICs to implement the same 3-port design, adding board area of at least 15 mm² and increasing BOM cost by $1.50 to $3.00 per unit. This makes TRSF3243EIRHBR the more efficient choice for PLCs with RS-232 port counts of 3 or above.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $2.0184 | $201.84 |
| 250+ | $1.9113 | $477.83 |
| 500+ | $1.8834 | $941.72 |
| 5000+ | $1.7038 | $8519.20 |
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