My Inquiry
My Account
Texas Instruments MAX3223EIDBR
- Part No.:
- MAX3223EIDBR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX3223EIDBR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX3223EIDBR from Texas Instruments is a 3-V to 5.5-V dual-channel RS-232 line driver and receiver IC with ±15-kV IEC61000-4-2 ESD protection, 500 kbit/s data rate, and auto-powerdown functionality. It integrates two drivers, two receivers, and a dual charge-pump circuit requiring only four 0.1-μF external capacitors, enabling compact serial interface design in portable industrial and computing equipment.
For engineers reviewing the MAX3223EIDBR datasheet, MAX3223EIDBR pinout, MAX3223EIDBR application, or MAX3223EIDBR equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative options for battery-powered RS-232 interface implementation.
Technical Context
The MAX3223EIDBR implements a dual charge-pump architecture generating ±VCC-derived rails (V+, V−) to meet TIA/EIA-232-F voltage swing requirements (±5 V min) from a single 3.3-V or 5-V supply. Its receiver inputs tolerate −25 V to +25 V, with hysteresis of 0.5 V and thresholds at ±2.7 V for valid signal detection.
Power management includes three operational modes: normal operation (FORCEON = HIGH), auto-powerdown (FORCEON = LOW, FORCEOFF = HIGH), and forced shutdown (FORCEOFF = LOW). The INVALID output asserts high when any RIN exceeds ±2.7 V or transitions through 0 V in under 30 μs, enabling host-level RS-232 presence monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 3.0 V to 5.5 V - enables direct integration with 3.3-V and 5-V logic domains without level-shifting. |
| ESD protection (RS-232 pins) | ±15-kV IEC61000-4-2 air-gap, ±8-kV contact - eliminates need for external TVS diodes in handheld device designs. |
| Max data rate | 500 kbit/s - supports standard UART communication up to 115.2 kbaud with margin, suitable for legacy industrial modems and point-of-sale terminals. |
| Standby current | 1 μA typical - extends battery life in always-on serial peripherals such as barcode scanners and medical telemetry devices. |
| External capacitors | 4 × 0.1 μF ceramic - reduces BOM count and PCB area versus legacy RS-232 transceivers requiring larger electrolytic or tantalum caps. |
| Receiver input threshold | ±2.7 V valid, ±0.3 V invalid window - provides robust noise immunity against ground bounce and cable-induced common-mode transients. |
| Driver slew rate | 4–30 V/μs - limits EMI emissions while maintaining signal integrity on 15-m RS-232 cables per TIA-232 specification. |
Pinout & Package
MAX3223EIDBR is packaged in a 20-pin SSOP (DB) package measuring 7.2 mm × 7.8 mm, with gull-wing leads and RoHS-compliant NiPdAu finish (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable control input | Active-high enable for receivers; drives ROUTx outputs to high-Z when low - allows dynamic power gating of receive path. |
| 2 (C1+) | Charge-pump capacitor positive terminal | Connects to C1+ node of internal flying capacitor network - critical for stable ±VCC rail generation. |
| 3 (V+) | Positive charge-pump output | Supplies +5.4 V (typ.) to drivers - enables compliant RS-232 output levels with 3.3-V VCC. |
| 4 (C1−) | Charge-pump capacitor negative terminal | Completes first flying cap loop - must be decoupled with 0.1-μF ceramic to GND per layout guidelines. |
| 5 (C2+) | Second charge-pump capacitor positive terminal | Connects to C2+ node - forms dual-capacitor topology that improves efficiency over single-pump alternatives. |
| 6 (C2−) | Second charge-pump capacitor negative terminal | Completes second flying cap loop - paired with C2+ to generate regulated V− rail. |
| 7 (V−) | Negative charge-pump output | Supplies −5.4 V (typ.) to drivers - ensures full RS-232 voltage swing (±5 V) from single supply. |
| 8 (DOUT2) | Channel 2 driver output | RS-232-compatible output driving TxD2 line - slew-limited to reduce radiated emissions in EMC-sensitive environments. |
| 9 (RIN2) | Channel 2 receiver input | Accepts RS-232 RxD2 signal with ±25-V fault tolerance - integrated hysteresis prevents chatter near 0 V. |
| 10 (ROUT2) | Channel 2 receiver output | TTL/CMOS-compatible logic-level output - directly interfaces with UART RX pin without external level translation. |
| 11 (FORCEOFF) | Force-off control input | Active-low shutdown signal - disables both drivers and receivers, reducing ICC to 1 μA for deep sleep mode. |
| 12 (VCC) | Main supply input | 3.3-V or 5-V primary power rail - powers internal logic, charge pump, and output stages. |
| 13 (GND) | Analog/digital ground reference | Common return for VCC, V+, V−, and signal paths - requires low-impedance connection to minimize ground bounce. |
| 14 (DOUT1) | Channel 1 driver output | Primary RS-232 transmit output (TxD1) - identical electrical specs to DOUT2 for dual-port applications. |
| 15 (RIN1) | Channel 1 receiver input | Primary RS-232 receive input (RxD1) - shares same ±25-V tolerance and ±2.7-V threshold as RIN2. |
| 16 (ROUT1) | Channel 1 receiver output | Primary logic-level output (RX1) - synchronous with RIN1, with 150-ns propagation delay (typ.). |
| 17 (FORCEON) | Force-on control input | Enables auto-powerdown when low - disables drivers if no valid RS-232 signal detected on RIN1/RIN2 for >30 μs. |
| 18 (DIN1) | Channel 1 driver input | TTL/CMOS logic input accepting 3.3-V signals even at 5-V VCC - eliminates need for external level shifters. |
| 19 (DIN2) | Channel 2 driver input | Secondary logic-level input (TX2) - electrically identical to DIN1 with same VIH/VIL thresholds. |
| 20 (INVALID) | RS-232 presence indicator | Open-drain output asserted high when valid RS-232 signal present on either RIN - used for wake-up interrupt in low-power systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RS-232 channels | Enables simultaneous TxD/RxD on two serial ports (e.g., modem + debug console) using one IC and shared charge pump. |
| Auto-powerdown with INVALID flag | Reduces supply current to 1 μA during idle periods and signals host MCU when RS-232 activity resumes - essential for battery runtime optimization. |
| Single-supply operation (3–5.5 V) | Eliminates need for dual ±12-V supplies or external DC-DC converters - simplifies power architecture in space-constrained portable designs. |
| ±15-kV IEC61000-4-2 ESD protection | Meets industrial surge immunity requirements without adding discrete TVS components - lowers system BOM cost and board area. |
| Four 0.1-μF external capacitors | Reduces capacitor footprint by >70% vs. legacy solutions requiring 1-μF electrolytics - improves reliability and thermal performance. |
| Logic-level compatibility across supply voltages | Accepts 3.3-V inputs with 5-V VCC - supports mixed-voltage system integration without level translators or additional logic gates. |
Applications
| Industrial Handheld Terminals | Medical Point-of-Care Devices |
|---|---|
|
Use Scenario: Barcode scanner module interfacing with host MCU via RS-232 in a ruggedized handheld terminal operating on Li-ion battery. IC Role / Device Role / Timing Role: Dual-channel RS-232 transceiver providing isolated TxD/RxD paths between scanner ASIC and ARM Cortex-M4 UART. Use Value: 1-μA auto-powerdown extends battery life beyond 12 hours per charge; ±15-kV ESD protection survives repeated electrostatic discharge in warehouse environments. |
Use Scenario: Portable ECG monitor transmitting waveform data to PC via RS-232 cable during clinical diagnostics. IC Role / Device Role / Timing Role: RS-232 level shifter converting 3.3-V UART signals from analog front-end SoC to ±5-V line-driver outputs. Use Value: 0.1-μF capacitor requirement minimizes PCB size in ultra-thin enclosure; INVALID output triggers MCU wake-up only on valid patient data transmission. |
| Embedded Industrial PLCs | Ruggedized Field Service Tools |
|
Use Scenario: Programmable logic controller with dual RS-232 ports for HMI communication and Modbus RTU fieldbus connectivity. IC Role / Device Role / Timing Role: Dual-line driver/receiver managing simultaneous RS-232 links to operator panel and sensor gateway. Use Value: ±25-V receiver input tolerance withstands induced transients on long industrial cables; 500-kbit/s rate supports fast firmware updates. |
Use Scenario: Handheld diagnostic tool for automotive repair, connecting to vehicle OBD-II port and technician laptop via RS-232. IC Role / Device Role / Timing Role: Robust physical-layer interface translating 3.3-V microcontroller UART to fault-tolerant RS-232 bus. Use Value: SSOP-20 package fits narrow PCB width; ±15-kV air-gap ESD rating prevents failure during technician handling in dry climates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232EIDWR | SOIC-20 package (DW), same electrical specs, but lacks INVALID output and auto-powerdown disable control (no FORCEON pin). | Requires external wake-up logic for battery-aware systems; suited for fixed-power industrial controllers where standby current is non-critical. | Select MAX3232EIDWR when board space permits SOIC-20 and INVALID functionality is unnecessary. |
| SP3223EBET-L | TSSOP-20 package (PW), 3.0–5.5-V operation, ±15-kV ESD, but only one driver/receiver pair and no auto-powerdown feature. | Limited to single-port applications; no INVALID flag or FORCEON/FORCEOFF controls - simpler but less flexible power management. | Choose SP3223EBET-L for cost-sensitive single-RS232 designs where dual-channel capability and advanced power control are not required. |
Compared with MAX3223EIDBR, MAX3232EIDWR offers identical RS-232 performance in a larger SOIC package but omits intelligent power-down signaling, while SP3223EBET-L reduces channel count and removes all power-management controls - making MAX3223EIDBR the only option supporting dual-port, low-power, and host-wake capabilities in SSOP-20.
Availability
MAX3223EIDBR is available at Aetrix Electronics and suitable for battery-powered systems, industrial handheld terminals, and medical point-of-care devices requiring stable component supply and guaranteed long-term availability.
Supply support for MAX3223EIDBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in interface IC design and industrial-grade reliability.
The MAX3223E series is part of TI's precision RS-232 transceiver portfolio, engineered specifically for low-power, ESD-hardened serial communication in portable and harsh-environment electronics.
FAQ
What is the maximum data rate supported by the MAX3223EIDBR?
The MAX3223EIDBR supports a maximum data signaling rate of 500 kbit/s under standard load conditions (CL = 1000 pF, RL = 3 kΩ). This rate accommodates common UART baud rates including 115.2 kbaud with significant timing margin, ensuring reliable communication across RS-232 cables up to 15 meters in length as specified in TIA/EIA-232-F.
Does the MAX3223EIDBR require external charge-pump capacitors?
Yes, the MAX3223EIDBR requires four external 0.1-μF ceramic capacitors (C1+, C1−, C2+, C2−) to operate its dual charge-pump circuit. These capacitors generate the ±VCC-derived V+ and V− rails needed for RS-232 voltage compliance. No electrolytic or tantalum capacitors are required - the 0.1-μF value is mandatory for stable operation at both 3.3-V and 5-V supply voltages.
How does the INVALID output function on the MAX3223EIDBR?
The INVALID output on the MAX3223EIDBR is an open-drain signal that goes high when a valid RS-232 signal (≥ ±2.7 V) is present on either RIN1 or RIN2, or when the input transitions through 0 V in under 30 μs. It remains low only when both receiver inputs stay within ±0.3 V for more than 30 μs - enabling precise host MCU wake-up detection without polling.
What is the operating temperature range for the MAX3223EIDBR?
The MAX3223EIDBR is rated for an operating free-air temperature range of −40°C to +85°C, as confirmed by its "I" grade designation and TI's official packaging documentation. This extended industrial temperature range makes it suitable for deployment in outdoor kiosks, factory-floor HMIs, and automotive service tools exposed to wide ambient variations.
Can the MAX3223EIDBR operate from a 3.3-V supply while interfacing with 5-V logic inputs?
Yes, the MAX3223EIDBR accepts 5-V logic-level inputs (e.g., DIN1, DIN2, FORCEON) even when powered from a 3.3-V VCC supply. Its input structure is designed for mixed-voltage operation, eliminating the need for external level translators when connecting to legacy 5-V microcontrollers or peripheral ICs - a key advantage over many competing RS-232 transceivers.
MAX3223EIDBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 2/2
- Duplex:
- Full
- Receiver Hysteresis:
- 500 mV
- Data Rate:
- 500kbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MAX3223EIDBR FAQ
1.How can I place an order for MAX3223EIDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3223EIDBR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX3223EIDBR reliable?
The price and inventory of MAX3223EIDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3223EIDBR is usually 5 days.
3.What payment methods are accepted for MAX3223EIDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3223EIDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3223EIDBR?
MAX3223EIDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3223EIDBR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX3223EIDBR?
For technical support, including MAX3223EIDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3223EIDBR requirements.
6.How does Aetrix verify that MAX3223EIDBR is sourced from the original manufacturer or authorized distributors?
All MAX3223EIDBR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX3223EIDBR meets industry standards.
7.What is the process for return or replacement of MAX3223EIDBR?
All MAX3223EIDBR units undergo pre-shipment inspection (PSI). If there is an issue with MAX3223EIDBR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX3223EIDBR part is unused and in its original packaging.
Return procedure for MAX3223EIDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX3223EIDBR Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
