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Texas Instruments MAX3227EIDBR
- Part No.:
- MAX3227EIDBR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX3227EIDBR.pdf
- Description:
- IC TRANSCEIVER FULL 1/1 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
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Product details
Overview
MAX3227EIDBR from Texas Instruments is a single-channel RS-232 line driver/receiver IC operating from 3-V to 5.5-V supply, featuring ±15-kV IEC 61000-4-2 ESD protection on RS-232 I/O pins, auto-powerdown plus (1 μA standby current), and 1 Mbit/s data rate - deployed in portable industrial terminals for reliable serial interface bridging between microcontrollers and legacy RS-232 peripherals.
For engineers reviewing the MAX3227EIDBR datasheet, MAX3227EIDBR pinout, MAX3227EIDBR application, or MAX3227EIDBR equivalent, this page delivers verified electrical parameters, SSOP-16 terminal mapping, real-world use cases in battery-powered systems, and validated alternative options with documented functional distinctions.
Technical Context
The MAX3227EIDBR integrates one RS-232 driver, one receiver, dual charge-pump circuitry generating ±2×VCC, and logic-level control signals (READY, INVALID, FORCEON, FORCEOFF) for autonomous power management. Its auto-powerdown plus feature triggers after 30 s of inactivity on DIN/RIN and restores operation upon edge detection.
It meets TIA/EIA-232-F and ITU v.28 standards, supports 3.3-V logic inputs with 3.3-V supply, and achieves 30-V/μs max slew rate at VCC = 3.3 V. The device is characterized for –40°C to +85°C operation and uses four 0.1-μF external capacitors for charge-pump operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 5.5 V - enables direct integration into modern low-voltage embedded systems without level-shifting. |
| Data Rate | 1 Mbit/s - supports full-speed RS-232 communication in handheld diagnostics tools and point-of-sale terminals. |
| ESD Protection | ±15 kV HBM, ±8 kV IEC 61000-4-2 contact, ±15 kV air-gap - eliminates need for external TVS diodes on RIN/DOUT lines. |
| Standby Current | 1 μA typical - extends battery life in always-on portable devices such as barcode scanners during idle periods. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in outdoor kiosks and factory-floor HMIs. |
| Charge-Pump Capacitors | 4 × 0.1 μF ceramic - reduces BOM count and PCB footprint versus legacy RS-232 transceivers requiring larger electrolytics. |
| Driver Slew Rate | 24–150 V/μs - limits EMI emissions while maintaining signal integrity over 15-m cable runs. |
Pinout & Package
Package: SSOP-16 (DB), 5.0 mm × 6.5 mm body, 0.65 mm pitch, 2.0 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (READY) | Power-good status output | Asserts high when V− reaches −3.5 V, signaling readiness to transmit - used for firmware synchronization before UART initialization. |
| 2 (C1+) | Voltage-doubler capacitor positive terminal | Connects to 0.1-μF capacitor forming first stage of charge pump - critical for stable +2×VCC generation. |
| 3 (V+) | +2×VCC output | Supplies positive RS-232 voltage rail; must be decoupled locally to suppress switching noise. |
| 4 (C1−) | Voltage-doubler capacitor negative terminal | Return path for C1; ties to GND or V− depending on topology - misconnection causes charge-pump failure. |
| 5 (C2+) | Inverting charge-pump capacitor positive terminal | Forms second-stage inverter with C2− to generate V− - requires tight layout to minimize parasitic inductance. |
| 6 (C2−) | Inverting charge-pump capacitor negative terminal | Reference node for V− generation; routed adjacent to C2+ to maintain coupling efficiency. |
| 7 (V−) | −2×VCC output | Provides negative RS-232 voltage rail; monitored by READY pin - open-circuit or short disables transmission. |
| 8 (RIN) | RS-232 receiver input | Accepts ±25 V RS-232 levels; internal 5-kΩ input resistance enables direct connection to DB9 connectors without biasing. |
| 9 (ROUT) | CMOS receiver output | Logic-level output compatible with 3.3-V microcontrollers; drives standard CMOS loads up to 1.6 mA sink. |
| 10 (INVALID) | Valid signal detector output | Active-low flag indicating presence of valid RS-232 voltage on RIN - used to wake host MCU from sleep mode. |
| 11 (DIN) | CMOS driver input | Accepts 3.3-V logic even at 3.3-V supply - eliminates level shifter in mixed-voltage systems. |
| 12 (FORCEON) | Manual driver enable input | Active-high override prevents auto-powerdown - essential for applications requiring guaranteed link-up time. |
| 13 (DOUT) | RS-232 driver output | Delivers ±5.4 V RS-232 output swing into 3-kΩ load - compliant with TIA-232-F drive capability requirements. |
| 14 (GND) | Ground reference | Common return for all analog and digital sections; must be connected to system ground plane with low-inductance path. |
| 15 (VCC) | Primary supply input | 3.0–5.5 V single supply powering logic, drivers, receivers, and charge pump - no separate analog/digital rails needed. |
| 16 (FORCEOFF) | Manual shutdown input | Active-low global disable - forces drivers, receivers, and charge pump into high-Z state, reducing ICC to <10 μA. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Powerdown Plus | Enters 1-μA standby after 30 s of inactivity and resumes on any DIN/RIN edge - eliminates firmware polling overhead in battery-powered designs. |
| Integrated Dual Charge Pump | Generates ±2×VCC from single 3.3-V/5-V supply using only four 0.1-μF caps - reduces solution size by >40% vs. discrete charge-pump implementations. |
| READY Output Signal | Asserts high only when V− stabilizes below −3.5 V - provides hardware handshake to prevent premature UART transmission attempts. |
| INVALID Output Flag | Indicates valid RS-232 signal presence on RIN with 2.7 V/−2.7 V thresholds - enables automatic cable-detect and hot-plug response. |
| Wide Logic Input Compatibility | Accepts 5-V-tolerant inputs at 3.3-V VCC - allows direct interfacing with legacy 5-V peripherals without external translators. |
Applications
| Industrial Handheld Terminal | Medical Point-of-Care Device |
|---|---|
|
Use Scenario: Portable diagnostic instrument with RS-232 port for connecting to legacy lab analyzers and printers. IC Role / Device Role / Timing Role: RS-232 line driver/receiver bridging 3.3-V ARM Cortex-M4 UART to ±12-V legacy equipment. Use Value: ±15-kV ESD protection ensures field reliability during frequent cable insertion/removal in clinical environments. |
Use Scenario: Battery-powered vital signs monitor transmitting patient data to hospital central stations via RS-232. IC Role / Device Role / Timing Role: Low-power serial interface enabling 72-hour runtime on single Li-ion cell. Use Value: 1-μA auto-powerdown plus extends battery life during standby without software intervention. |
| Ruggedized Field Data Logger | Automated Test Equipment (ATE) Interface Module |
|
Use Scenario: Outdoor environmental sensor node logging temperature/humidity data to PC via RS-232 cable. IC Role / Device Role / Timing Role: Robust physical layer translator supporting −40°C to +85°C ambient operation. Use Value: Guaranteed 1-Mbit/s operation across full temperature range ensures consistent firmware update throughput. |
Use Scenario: Rack-mounted ATE controller communicating with legacy test fixtures using RS-232 handshaking. IC Role / Device Role / Timing Role: Driver/receiver with FORCEON/FORCEOFF control enabling precise timing of DTR/RTS assertions. Use Value: READY and INVALID outputs provide deterministic hardware synchronization for automated test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232EIDR | 2-driver/2-receiver channel count; identical 3–5.5-V supply and ±15-kV ESD rating; uses same 0.1-μF caps. | Designed for full-duplex UART links requiring simultaneous TX/RX; occupies larger 20-pin SOIC package. | Select when dual-channel RS-232 is required; not pin-compatible with MAX3227EIDBR's 16-pin SSOP layout. |
| SP3227ET-L | Single-channel like MAX3227EIDBR but rated for −40°C to +105°C; lower 0.5-μA standby current; same SSOP-16 footprint. | Targeted at extended-temperature automotive infotainment head units; lacks READY/INVALID status outputs. | Choose for higher-temp environments where hardware status signaling is non-critical; pinout differs on control pins. |
Compared with MAX3227EIDBR, MAX3232EIDR offers dual-channel capability at the cost of increased board area and channel count mismatch, while SP3227ET-L trades status signaling for wider temperature range and marginally lower quiescent current - neither is pin-compatible, requiring PCB redesign.
Availability
MAX3227EIDBR is available at Aetrix Electronics and suitable for industrial handheld terminals, medical point-of-care devices, ruggedized field data loggers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX3227EIDBR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and interface ICs.
The MAX3227EIDBR belongs to TI's RS-232 transceiver product line, engineered specifically for low-power, high-ESD robustness serial communication in portable and industrial systems operating from single 3.3-V/5-V supplies.
FAQ
What is the operating temperature range of the MAX3227EIDBR?
The MAX3227EIDBR is specified for operation from –40°C to +85°C, making it suitable for industrial environments including outdoor kiosks and factory-floor HMIs. This range is confirmed in the ordering information table and thermal characterization section of the official TI datasheet SLLS715A.
Does the MAX3227EIDBR require external charge-pump capacitors?
Yes, the MAX3227EIDBR requires four external 0.1-μF ceramic capacitors (C1+, C1−, C2+, C2−) to operate its dual charge-pump circuit. These capacitors generate ±2×VCC from a single 3.3-V or 5-V supply, eliminating the need for dual power rails.
How does the auto-powerdown plus feature work in the MAX3227EIDBR?
The MAX3227EIDBR enters 1-μA standby mode automatically after 30 seconds of inactivity on DIN or RIN inputs. It wakes instantly upon detecting a valid logic edge, with no BIOS or OS changes required. This behavior is detailed in the FUNCTION TABLE and AUTO-POWERDOWN SECTION of the TI datasheet.
What is the purpose of the READY pin on the MAX3227EIDBR?
The READY pin on the MAX3227EIDBR is an active-high output that asserts only after V− reaches −3.5 V, confirming stable charge-pump regulation. It serves as a hardware handshake to prevent premature UART transmission - a key design feature absent in many competing RS-232 transceivers.
Is the MAX3227EIDBR pin-compatible with older MAX3227 variants?
No, the MAX3227EIDBR is not pin-compatible with non-E versions (e.g., MAX3227CDBR). The "E" suffix denotes enhanced ESD performance (±15-kV IEC), and while the SSOP-16 footprint is identical, electrical characteristics and timing behavior differ - migration requires validation per TI's errata and characterization reports.
MAX3227EIDBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Full
- Receiver Hysteresis:
- 500 mV
- Data Rate:
- 1Mbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
MAX3227EIDBR FAQ
1.How can I place an order for MAX3227EIDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3227EIDBR 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 MAX3227EIDBR reliable?
The price and inventory of MAX3227EIDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3227EIDBR is usually 5 days.
3.What payment methods are accepted for MAX3227EIDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3227EIDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3227EIDBR?
MAX3227EIDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3227EIDBR 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 MAX3227EIDBR?
For technical support, including MAX3227EIDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3227EIDBR requirements.
6.How does Aetrix verify that MAX3227EIDBR is sourced from the original manufacturer or authorized distributors?
All MAX3227EIDBR 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 MAX3227EIDBR meets industry standards.
7.What is the process for return or replacement of MAX3227EIDBR?
All MAX3227EIDBR units undergo pre-shipment inspection (PSI). If there is an issue with MAX3227EIDBR, 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 MAX3227EIDBR part is unused and in its original packaging.
Return procedure for MAX3227EIDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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