MAX232CSE+T - +5V RS-232 Transceiver, 16-SOIC | Analog Devices
MPN: MAX232CSE+T ✓ فعالMAX232CSE+T جائزہ
A RS-232 transceiver (line driver/receiver) is an interface IC that translates logic-level signals (typically 0/5V or 0/3.3V CMOS/TTL) to the higher-voltage bipolar signaling levels defined by the EIA/TIA-232E and V.28/V.24 standards. These standards require driver outputs above ±5V into 3 kΩ loads and receivers that translate bipolar inputs to standard logic levels. The MAX232 sits in the interface IC family within the broader integrated circuits hierarchy: interface IC > transceiver > line driver/receiver > signal conditioning IC > semiconductor.
Key features include single +5V operation eliminating the need for ±12V rails, integrated charge-pump voltage doubler/inverter requiring only four external 1 µF capacitors, true RS-232 compliant outputs (typically ±7.5V minimum), and on-board TTL/CMOS-compatible receiver inputs with 5 kΩ resistive pull-down to ground. The wide commercial operating temperature range (0 °C to +70 °C for the C-grade) suits point-of-sale terminals, industrial control consoles, and embedded serial ports.
Architecturally, the MAX232 uses a switched-capacitor charge pump (typically a dual-pump Dickson topology) with internal MOSFET switches clocked above the audio band. This generates the negative rail from the +5V supply without inductors, keeping the solution purely capacitive. Receivers employ hysteresis on their inputs to reject noise on long cables.
Typical applications include RS-232 serial ports on microcontrollers (Arduino, PIC, STM32), point-of-sale (POS) terminals, industrial control equipment, networking routers and switches with console ports, and legacy PC peripherals. The 16-SOIC narrow-body package and tape-and-reel shipping suit high-volume automated assembly.
When designing, place the four charge-pump capacitors as close to the C1+, C1-, C2+, C2- pins as possible using short traces, and use the V+ and V- pins as additional bypass. For higher data rates above 120 kb/s or extended temperature ranges, consider the MAX232E (200 kb/s, -40 °C to +85 °C) or MAX3232 (3V to 5.5V operation) families.
This page synthesizes distributor pricing, drop-in cross-brand alternatives such as the Sipex/MaxLinear SP232ACN-L/TR, and practical charge-pump layout guidance not typically consolidated in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل MAX232CSE+T — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں MAX232CSE+T (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Data Rate, Product Type, ESD Protection, Operating Temperature.
MAX232CSE+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX232EESE+T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX232CWE+T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SP232ACN-L/TR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →MAX3232CSE+T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX232CSE+T تفصیلات
| فنکشن | RS-232 Line Driver/Receiver (Transceiver) |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Protocol | RS-232 (EIA/TIA-232E, V.28/V.24) |
| Supply Voltage (Vcc) | 4.5 V to 5.5 V (single +5V supply) |
| ڈیٹا ریٹ | 120 kb/s |
| RS-232 Driver Output Voltage | ±7.5 V minimum (typical ±9 V) into 3 kΩ load |
| Receiver Input Voltage Range | ±30 V |
| Charge Pump | Internal; requires 4 × 1 µF external capacitors |
| آپریٹنگ درجہ حرارت رینج | 0 °C to +70 °C (commercial C-grade) |
| پیکیج | 16-pin Narrow SOIC (SOIC-N-16) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 1 (unlimited floor life at <30 °C / 85 % RH) |
| Lead-Free / RoHS | Yes (compliant per +T suffix) |
| Packaging | Tape & Reel (T+R) |
MAX232CSE+T پن کنفیگریشن
| پن 1 | C1+ — Charge-pump flying capacitor positive terminal (positive pump) |
| پن 2 | V+ — Charge-pump generated +2×VCC supply for driver output stages (~+9V) |
| پن 3 | C1- — Charge-pump flying capacitor negative terminal (positive pump) |
| پن 4 | C2+ — Charge-pump flying capacitor positive terminal (negative pump) |
| پن 5 | C2- — Charge-pump flying capacitor negative terminal (negative pump) |
| پن 6 | V- — Charge-pump generated -2×VCC supply for driver output stages (~-9V) |
| پن 7 | T2OUT — RS-232 Driver 2 output |
| پن 8 | R2IN — RS-232 Receiver 2 input |
| پن 9 | R2OUT — TTL/CMOS Receiver 2 output |
| پن 10 | T2IN — TTL/CMOS Driver 2 input |
| پن 11 | T1IN — TTL/CMOS Driver 1 input |
| پن 12 | R1OUT — TTL/CMOS Receiver 1 output |
| پن 13 | R1IN — RS-232 Receiver 1 input |
| پن 14 | T1OUT — RS-232 Driver 1 output |
| پن 15 | GND — Ground |
| پن 16 | VCC — +4.5V to +5.5V supply input |
عام استعمالات
MAX232CSE+T کے لیے موزوں ہے 6 ایپلیکیشنs: Microcontroller RS-232 Serial Port (UART to DB-9), Industrial RS-232 Control and Instrumentation, Point-of-Sale (POS) Terminal Serial Interfaces, Network Router and Switch Console Port, Legacy PC Peripheral Interface (Industrial PCs), Embedded Debug and Programming Interfaces.
Microcontroller RS-232 Serial Port (UART to DB-9)
The MAX232CSE+T is the de-facto level translator between a 3.3V or 5V microcontroller UART (TTL 0/3.3V or 0/5V CMOS) and an external DB-9 RS-232 port requiring bipolar ±5V minimum levels. Its integrated charge pump derives ±9V typical from a single +5V rail using four 1 µF capacitors, eliminating the need for a separate DC-DC converter or dual-rail supply. With 120 kb/s data rate and 5 kΩ receiver pull-down to ground, it pairs cleanly with STM32, PIC, AVR, and Arduino-class MCUs. Place the four charge-pump capacitors (typically X7R 1 µF 25V) as close to the C1+/C1-/C2+/V+/V- pins as possible to minimize supply ripple. ESD protection should be added externally on the DB-9 connector for industrial environments.
تجویز کردہ
Industrial RS-232 Control and Instrumentation
Factory-floor PLCs, motor drives, and serial-controlled instrumentation commonly require EIA/TIA-232E links to legacy controllers. The MAX232CSE+T's commercial 0 °C to +70 °C temperature range (or the MAX232E extended -40 °C to +85 °C variant) suits indoor industrial enclosures and panel-mount serial ports. Its true RS-232 compliant ±7.5V minimum driver output into a 3 kΩ load ensures interoperability with downstream equipment. Two drivers and two receivers are sufficient for TX/RX plus hardware-flow-control RTS/CTS handshake lines. Typical schematics use a T1IN/R1OUT pair wired to the MCU UART and a T2IN/R2OUT pair wired to MCU GPIO for RTS/CTS. The 16-SOIC narrow-body package fits easily inside IP65-rated enclosure housings.
تجویز کردہ
Point-of-Sale (POS) Terminal Serial Interfaces
POS terminals require RS-232 links to legacy peripherals such as receipt printers, barcode scanners, cash-drawer triggers, and customer-facing displays. The MAX232CSE+T supplies two RS-232 driver/receiver pairs enough for a printer port and a scanner port, with the integrated charge pump keeping the bill-of-materials lean - no extra ±12V supply, no inductors, only four 1 µF X7R ceramic capacitors. Its 120 kb/s data rate comfortably handles serial printer and scanner data streams. The SOIC-N-16 footprint is easy to route on the dense POS main board and the part's +5V supply aligns with typical POS platform rails.
تجویز کردہ
Network Router and Switch Console Port
Enterprise routers, switches, and access points include an RJ-45 console port wired through a TTL-to-RS-232 transceiver for out-of-band management. The MAX232CSE+T is widely used in this role because it operates from the board's +5V rail and provides ±7.5V RS-232 levels directly with only four 1 µF caps. The console-port MPD (modem) signals DTR, DSR, TX, RX, RTS, and CTS can all be supported with the two drivers and two receivers plus a few discrete inversions. Pin-compatibility with the SP232ACN-L/TR (MaxLinear) gives design teams a second-source option to manage supply-chain risk in long-lifecycle networking hardware.
تجویز کردہ
Legacy PC Peripheral Interface (Industrial PCs)
Industrial PCs, test-and-measurement instruments, and laboratory data-acquisition systems often retain RS-232 COM ports for compatibility with older peripherals and lab equipment. The MAX232CSE+T is the canonical transceiver on the COM-port side of the motherboard, interfacing the Super-I/O chip's UART (TTL) to the DB-9 connector (RS-232 levels). Its small 16-SOIC narrow-body footprint, single +5V operation, and proven interoperability with virtually all PC software make it a standard choice. Receive path robustness (±30 V receiver input range) protects against mis-wired cabling in field service situations.
تجویز کردہ
Embedded Debug and Programming Interfaces
Development boards, ISP programmers, and in-circuit debuggers expose a TTL-level UART header that is often converted to a PC-facing RS-232 port via the MAX232CSE+T. Using it on a debugger/programmer board provides a debug output that any PC terminal program can read without extra USB-serial dongles. With two drivers and two receivers it can also handle bootloader TX/RX plus a hardware reset handshake. Its wide 4.5V to 5.5V supply range accommodates 5V-tolerant microcontroller debug pins, and the part's proven track record across thousands of evaluation boards makes it a low-risk reference design choice.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا MAX232CSE+T — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | MAX232CSE+ | MAX232EESE+T | MAX232CWE+T | SP232ACN-L/TR | MAX3232CSE+T |
|---|---|---|---|---|---|---|
| Package | 16-SOIC narrow (SOIC-N-16) | 16-SOIC narrow (same) | 16-SOIC narrow (same) | 16-SOIC wide (NOT pin-to-pin) | 16-SOIC narrow (same) | 16-SOIC narrow (same) |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices | Analog Devices | Analog Devices | MaxLinear (Sipex) | Analog Devices |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 3.0V to 5.5V (wider) |
| Data Rate | 120 kb/s | 120 kb/s | 200 kb/s | 200 kb/s | 120 kb/s | 120 kb/s (250 kb/s for E variant) |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Drivers / Receivers | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 |
| Charge-Pump Caps | 4 × 1 µF | 4 × 1 µF | 4 × 1 µF | 4 × 1 µF | 4 × 1 µF | 4 × 0.1 µF (smaller) |
اہم امتیازی خصوصیات
- Single +5V supply with integrated charge pump (بمقابلہMAX3232CSE+T)
- Cross-brand second source (SP232ACN-L/TR) (بمقابلہMAX232CSE+ only (single-vendor))
- Wide distributor availability with single +5V supply (بمقابلہMAX232EESE+T)
ڈیزائن نوٹس
Place the four charge-pump flying and reservoir capacitors (C1, C2 flying, C3+, C4-) as close as possible to the C1+, C1-, C2+, C2-, V+, and V- pins of the MAX232CSE+T. Use short, wide traces to minimize the high-frequency charge-pump current loop. Estimated: with 4 × 1 µF X7R ceramic capacitors on a properly designed ground plane, charge-pump output ripple is typically under 50 mV pk-pk. Add a 0.1 µF decoupling capacitor right at pin 16 (VCC) and a 1 µF bulk cap within 5 mm of the VCC pin for clean driver output levels.
Do NOT substitute 1 µF capacitors with 0.1 µF parts on the MAX232CSE+T - this part requires 1 µF minimum for proper charge-pump operation. Using smaller capacitors will cause insufficient driver output voltage (below the ±5V RS-232 spec) and potentially violate the EIA/TIA-232E driver output requirement of ±5V minimum into 3 kΩ loads. If you need 0.1 µF capacitors, switch to the MAX3232CSE+T family instead - it is pin-compatible but optimized for 0.1 µF charge-pump caps and supports 3.0V to 5.5V supply.
Keep the RS-232 driver output traces (T1OUT, T2OUT) away from sensitive analog or RF traces - the charge-pump switching at frequencies above the audio band (~100 kHz to 1 MHz) can radiate onto nearby signal traces. Use a ground plane under the MAX232CSE+T to provide a low-impedance return path for the high-frequency charge-pump currents. For ESD-sensitive applications, add external TVS diodes (such as PESD5V0L1BA or similar) on each RS-232 line near the DB-9 connector, since the MAX232CSE+T internal ESD protection is limited.
For cable lengths above 3 meters at 120 kb/s, consider adding series resistors (~10 Ω) in the T1OUT/T2OUT lines to dampen reflections on capacitive cables. Estimated: a typical DB-9 cable has 50 to 100 pF per meter of distributed capacitance; a 10 Ω series resistor with a 100 pF/m × 3 m = 300 pF cable gives a damping factor that reduces ringing on transitions. For long cables or noisy environments, also add a small RC filter (100 Ω + 100 pF) at the receiver input to filter HF noise.
تعمیل کی معلومات
RoHS and REACH compliant per +T suffix in MPN (lead-free, matte-tin lead finish). Halogen-free per JEDEC JS709B. Not AEC-Q100 qualified (commercial grade only) - choose MAX232EESE+T or MAX232AEUE+ for automotive/extended-temperature applications.
