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Analog Devices Inc./Maxim Integrated MAX3110ECWI+G36
- Part No.:
- MAX3110ECWI+G36
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Controllers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX3110ECWI+G36.pdf
- Description:
- IC UART/TXRX RS232 W/CAPS 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,196
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Product details
Overview
MAX3110ECWI+G36 from Maxim Integrated is a SPI/MICROWIRE-compatible UART with integrated ±15kV ESD-protected RS-232 transceiver, 2-driver/2-receiver interface, internal charge-pump capacitors, and crystal oscillator - all in a single 28-pin wide SO package. It delivers true EIA/TIA-232 output levels down to VCC = +4.5V, operates up to 230kbps, and consumes only 600µA in active mode. It is used in space-constrained, battery-powered industrial front-panel interfaces requiring robust serial communication.
For engineers reviewing the MAX3110ECWI+G36 datasheet, MAX3110ECWI+G36 pinout, MAX3110ECWI+G36 application, or MAX3110ECWI+G36 equivalent, key selection considerations include its single-supply +5V operation, hardware/software shutdown (10µA), 8-word receive FIFO, SPI-compatible 16-bit full-duplex interface, and guaranteed 230kbps RS-232 performance with no external capacitors required.
Technical Context
The MAX3110ECWI+G36 integrates a UART with crystal oscillator and programmable baud-rate generator (300–230kbaud) alongside a dual-driver/dual-receiver RS-232 transceiver featuring proprietary low-dropout output stages. Its SPI/QSPI/MICROWIRE interface uses CPOL = 0, CPHA = 0 timing and requires strict 16-bit word transfers with CS-controlled framing.
UART and RS-232 functions share only VCC and GND connections, enabling independent use; the device supports hardware shutdown (RS-232 disabled, UART active) and combined hardware/software shutdown (full disable, 3µA typical). Receivers remain active during hardware shutdown to monitor external devices while drawing just 10µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | +4.5V to +5.5V - enables direct connection to standard +5V logic rails without regulation |
| Max Data Rate | 230kbps - guarantees full EIA/TIA-232 compliance at high-speed diagnostic and POS port rates |
| Supply Current | 600µA active - minimizes power draw in portable/battery-powered equipment |
| Shutdown Current | 10µA with receiver interrupt active - allows wake-on-RX while preserving ultra-low standby power |
| ESD Protection | ±15kV IEC 1000-4-2 air/contact - eliminates need for external TVS diodes on RS-232 lines |
| Transceiver Outputs | 2 drivers (T1OUT/T2OUT), 2 receivers (R1OUT/R2OUT) - supports dual-channel RS-232 links (e.g., modem + debug) |
| FIFO Depth | 8-word receive FIFO - reduces MCU interrupt overhead and prevents data loss at bursty 115.2kbps |
Pinout & Package
MAX3110ECWI+G36 is housed in a 28-pin Wide SO (SOIC-W) package, 11.0mm × 7.6mm body, 1.27mm pitch, gull-wing leads. Pin 1 marked by notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | R2IN | RS-232 receiver input channel 2 - accepts ±25V input, compatible with legacy DB-9 DCE/DTE wiring |
| 2 | R2OUT | TTL/CMOS-level output from RS-232 receiver 2 - directly interfaces to µC GPIO or level-shifter inputs |
| 3 | T2IN | TTL/CMOS-level input to RS-232 transmitter 2 - driven by µC UART TX or SPI-controlled data path |
| 4 | T1IN | TTL/CMOS-level input to RS-232 transmitter 1 - primary UART TX path; supports RTS-controlled driver enable |
| 5 | R1OUT | TTL/CMOS-level output from RS-232 receiver 1 - main receive data path to µC; interrupt-capable via RX edge |
| 6 | R1IN | RS-232 receiver input channel 1 - primary serial link input; ±15kV ESD protected per IEC 1000-4-2 |
| 7 | T1OUT | True RS-232 voltage-level output (±5.4V swing) - drives standard DB-9 connectors without external level shifters |
| 8 | VCC | +5V supply input - powers both UART core and RS-232 charge pump; decoupling capacitor required at pin |
| 9 | X2 | Crystal oscillator second terminal - left unconnected when using external CMOS clock on X1 |
| 10 | X1 | Crystal oscillator first terminal / external CMOS clock input - supports 1.8432MHz crystal for standard baud rates |
| 11 | CTS | Active-low hardware flow control input - monitored by UART to pause transmission; Schmitt-triggered |
| 12 | RTS | Active-low hardware flow control output - controlled by RTS bit; also usable as RS-485 driver-enable signal |
| 13 | RX | Asynchronous serial data input to UART - receives R1OUT/R2OUT logic signals; generates IRQ on transition in shutdown |
| 14 | TX | Asynchronous serial data output from UART - drives T1IN/T2IN; full-duplex operation supported |
| 15 | DIN | SPI/MICROWIRE serial data input - Schmitt-triggered; latched on SCLK rising edge; expects 16-bit words |
| 16 | DOUT | SPI/MICROWIRE serial data output - open-drain capable; tri-stated when CS high; outputs 16-bit response |
| 17 | SCLK | SPI/MICROWIRE serial clock input - Schmitt-triggered; defines timing for DIN sampling and DOUT validity |
| 18 | CS | Active-low chip-select input - initiates SPI frame; DOUT enters high-impedance state when deasserted |
| 19 | IRQ | Open-drain interrupt output - asserts on FIFO full, parity error, CTS change, or RX edge; requires pull-up resistor |
| 20 | SHDN | Hardware shutdown control - drive low to disable RS-232 transmitters and charge pump; UART remains active |
| 21 | V+ | +5.5V internal charge-pump output - not user-accessible; powers RS-232 transmitter positive rail |
| 22 | C1+ | Internal voltage-doubler capacitor positive terminal - not user-accessible; part of integrated charge-pump network |
| 23 | C1- | Internal voltage-doubler capacitor negative terminal - not user-accessible; no external connection required |
| 24 | C2+ | Internal inverting charge-pump capacitor positive terminal - not user-accessible; enables negative rail generation |
| 25 | C2- | Internal inverting charge-pump capacitor negative terminal - not user-accessible; eliminates need for C2 ext |
| 26 | V- | –5.5V internal charge-pump output - not user-accessible; powers RS-232 transmitter negative rail |
| 27 | GND | Analog/digital ground reference - common return for UART, transceiver, and charge pump; star grounding recommended |
| 28 | T2OUT | True RS-232 voltage-level output channel 2 - second independent RS-232 transmit line; ±5.4V swing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated UART + RS-232 transceiver | Reduces BOM count by eliminating separate UART IC and RS-232 line driver/receiver chips |
| Internal charge-pump capacitors | Removes four external 1µF ceramic capacitors - saves >10mm² PCB area and simplifies layout |
| 8-word receive FIFO | Enables burst-mode reception without CPU polling; cuts interrupt frequency by 8× vs. single-byte buffer |
| SPI/QSPI/MICROWIRE interface | Replaces parallel µC bus or UART GPIOs - frees ≥6 MCU pins and shrinks firmware driver footprint |
| ±15kV ESD protection on R_IN/T_OUT | Meets IEC 61000-4-2 Level 4 without external protection - certified for industrial field deployment |
| Hardware/software shutdown modes | Supports two-tier power management: partial (10µA, receivers active) or full (3µA, complete idle) |
Applications
| Point-of-Sale (POS) Terminals | Industrial Front-Panel Interfaces |
|---|---|
Use Scenario: Compact handheld or countertop POS terminals requiring reliable RS-232 connectivity to receipt printers, barcode scanners, and cash drawers. IC Role / Device Role / Timing Role: Dual-channel RS-232 transceiver handles simultaneous printer (T1OUT/R1IN) and scanner (T2OUT/R2IN) links; UART manages command/response protocol parsing. Use Value: Single-chip integration eliminates level-shifter discretes and reduces board area by >30% versus discrete UART + MAX232 solution. |
Use Scenario: Operator panels on PLCs, HMIs, or test equipment needing local serial diagnostics and configuration via DB-9 ports. IC Role / Device Role / Timing Role: Provides isolated, ESD-hardened RS-232 physical layer and configurable UART with FIFO buffering for real-time parameter updates. Use Value: ±15kV ESD rating ensures immunity to operator-induced discharges; 10µA shutdown enables always-on monitoring without battery drain. |
| Telecom Diagnostic Ports | Hand-Held/Battery-Powered Equipment |
Use Scenario: Field-service diagnostic ports on routers, switches, or base stations where technicians connect laptops via RS-232 for firmware recovery or log capture. IC Role / Device Role / Timing Role: Acts as bridge between µC's SPI bus and legacy RS-232 laptop interface; supports 230kbps for rapid log dump. Use Value: Guaranteed 230kbps operation meets telecom CLI throughput requirements; internal capacitors prevent capacitor aging failure in unattended gear. |
Use Scenario: Portable data loggers, handheld meters, or medical devices powered by coin cells or Li-ion batteries requiring long operational life. IC Role / Device Role / Timing Role: Low-power UART handles sensor data streaming; hardware shutdown (10µA) enables wake-on-RX for event-driven operation. Use Value: 600µA active current extends battery life >2× vs. legacy solutions; single +5V supply simplifies power architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART + RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3222ECAE+T | 2-driver/2-receiver RS-232 only - no integrated UART; requires external µC UART or SPI-to-UART bridge | Used where existing µC has UART peripheral but lacks SPI interface or needs pin-strapped RS-232 only | Select when board already implements UART logic and only RS-232 level translation is needed |
| MAX3100EEE+ | UART-only (no RS-232 transceivers); SPI interface; requires external MAX3232-type transceiver for RS-232 | Used in designs separating protocol handling (UART) from physical layer (transceiver) for flexibility or voltage scaling | Select when system requires 3.3V RS-232 transceivers or modular design with independent transceiver selection |
Compared with MAX3110ECWI+G36, MAX3222ECAE+T offers higher RS-232 drive strength but adds BOM complexity and PCB area; MAX3100EEE+ provides identical SPI UART functionality but shifts RS-232 implementation burden to external components - neither matches the single-chip, capacitor-free, 5V-native integration of MAX3110ECWI+G36.
Availability
MAX3110ECWI+G36 is available at Aetrix Electronics and suitable for point-of-sale terminals, industrial HMI front panels, and telecom diagnostic ports requiring stable component supply, long-term manufacturability, and guaranteed ESD robustness.
Supply support for MAX3110ECWI+G36 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX3110E series was designed to consolidate UART functionality and RS-232 physical layer into one compact, low-power, capacitor-free package for space-constrained embedded systems requiring rugged serial connectivity.
FAQ
What is the operating voltage range for MAX3110ECWI+G36?
The MAX3110ECWI+G36 operates from +4.5V to +5.5V on VCC. It is specified for true RS-232 output performance across this entire range, with typical operation at +5V. Operation below +4.5V is not guaranteed and may result in non-compliant output voltage levels or reduced data rate capability.
Does MAX3110ECWI+G36 require external capacitors for RS-232 operation?
No, MAX3110ECWI+G36 does not require external capacitors for RS-232 operation. It integrates internal charge-pump capacitors for both voltage doubling (V+) and inversion (V−), eliminating the need for the four 1µF external ceramics typically required by legacy RS-232 transceivers like the MAX232.
How many RS-232 channels does MAX3110ECWI+G36 support?
MAX3110ECWI+G36 supports two independent RS-232 channels: one with T1OUT/R1IN/R1OUT and another with T2OUT/R2IN/R2OUT. Each channel provides full EIA/TIA-232 compliant voltage levels (±5.4V), ±15kV ESD protection, and TTL/CMOS logic interfacing.
What is the maximum guaranteed data rate for MAX3110ECWI+G36?
The MAX3110ECWI+G36 is guaranteed to operate at up to 230kbps while maintaining full EIA/TIA-232 output voltage specifications. Electrical characteristics confirm operation up to 250kbps under typical conditions, but 230kbps is the production-tested, datasheet-guaranteed limit for robust interoperability.
Can MAX3110ECWI+G36 be used with a 3.3V microcontroller?
Yes, MAX3110ECWI+G36 can interface with 3.3V microcontrollers: its SPI logic inputs (DIN, SCLK, CS, CTS, RX) accept 0.2VCC/0.7VCC thresholds (i.e., 1.0V/3.5V at VCC = +5V), and outputs (DOUT, TX, RTS) are TTL/CMOS compatible. However, note that MAX3110ECWI+G36 itself requires +5V VCC - it is not a 3.3V-supply device like the MAX3111E.
MAX3110ECWI+G36 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Programmable:
- Not Verified
- Protocol:
- RS232, RS485
- Function:
- Controller
- Interface:
- SPI, UART
- Standards:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply:
- 600µA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SOIC
- Grade:
- -
- Qualification:
- -
MAX3110ECWI+G36 FAQ
1.How can I place an order for MAX3110ECWI+G36 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3110ECWI+G36 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 MAX3110ECWI+G36 reliable?
The price and inventory of MAX3110ECWI+G36 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3110ECWI+G36 is usually 5 days.
3.What payment methods are accepted for MAX3110ECWI+G36?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3110ECWI+G36 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3110ECWI+G36?
MAX3110ECWI+G36 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3110ECWI+G36 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 MAX3110ECWI+G36?
For technical support, including MAX3110ECWI+G36 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3110ECWI+G36 requirements.
6.How does Aetrix verify that MAX3110ECWI+G36 is sourced from the original manufacturer or authorized distributors?
All MAX3110ECWI+G36 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 MAX3110ECWI+G36 meets industry standards.
7.What is the process for return or replacement of MAX3110ECWI+G36?
All MAX3110ECWI+G36 units undergo pre-shipment inspection (PSI). If there is an issue with MAX3110ECWI+G36, 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 MAX3110ECWI+G36 part is unused and in its original packaging.
Return procedure for MAX3110ECWI+G36:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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