Data Sheet
MAX232 Dual EIA-232 Drivers and Receivers
1 Features
- Meets or exceeds TIA/EIA-232-F and ITU recommendation V.28
- Operates from a single 5V power supply with 1µF charge-pump capacitors
- Operates up to 120kbit/s
- Two drivers and two receivers
- ±30V Input levels
- Low supply current: 8mA typical
- ESD protection exceeds JESD 22
- 2000V Human-body model (A114-A)
- Upgrade with improved ESD (15kV HBM) and 0.1µF charge-pump capacitors is available with the MAX202 device
2 Applications
- TIA/EIA-232-F
- Battery-powered systems
- Terminals
- Modems
- Computers
3 Description
The MAX232 device is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIA-232-F voltage levels from a single 5V supply. Each receiver converts TIA/EIA-232-F inputs to 5V TTL/CMOS levels. These receivers have a typical threshold of 1.3 V, a typical hysteresis of 0.5V, and can accept ±30V inputs. Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels.
Package
Information
| PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) |
|---|---|---|
| MAX232 | SOIC (16) | 9.9mm × 6mm |
| SOIC (16) | 10.4mm × 10.3mm | |
| PDIP (16) | 19.3mm × 9mm | |
| SOP (16) | 10.2mm × 7.8 mm |
(1) For more Information, see Section 11 .
(2) The package size (length × width)
is a nominal value and includes pins, where applicable.
Simplified Schematic4 Pin Configuration and Functions
Figure 4-1 MAX232: D, DW, N or NS Package
MAX232I: D, DW, or N Package
(Top View)
MAX232I: D, DW, or N Package
(Top View)
Table 4-1 Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| C1+ | 1 | — | Positive lead of C1 capacitor |
| VS+ | 2 | O | Positive charge pump output for storage capacitor only |
| C1- | 3 | — | Negative lead of C1 capacitor |
| C2+ | 4 | — | Positive lead of C2 capacitor |
| C2- | 5 | — | Negative lead of C2 capacitor |
| VS- | 6 | O | Negative charge pump output for storage capacitor only |
| T2OUT | 7 | O | RS232 line data output (to remote RS232 system) |
| R2IN | 8 | I | RS232 line data input (from remote RS232 system) |
| R2OUT | 9 | O | Logic data output (to UART) |
| T2IN | 10 | I | Logic data input (from UART) |
| T1IN | 11 | I | Logic data input (from UART) |
| R1IN | 13 | I | RS232 line data input (from remote RS232 system) |
| T1OUT | 14 | O | RS232 line data output (to remote RS232 system) |
| GND | 15 | — | Ground |
| VCC | 16 | — | Supply Voltage, Connect to external 5V power supply |
5 Specifications
5.1 Absolute Maximum Ratings(1)
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | |||||
|---|---|---|---|---|---|---|---|
| VCC | Input Supply voltage range(2) | –0.3 | 6 | V | |||
| VS+ | Positive output supply voltage range | VCC – 0.3 | 15 | V | |||
| VS– | Negative output supply voltage range | –0.3 | –15 | V | |||
| VI | Input voltage range | T1IN, T2IN | –0.3 | VCC + 0.3 | V | ||
| R1IN, R2IN | ±30 | ||||||
| VO | Output voltage range | T1OUT, T2OUT | VS– – 0.3 | VS+ + 0.3 | V | ||
| R1OUT, R2OUT | –0.3 | VCC + 0.3 | |||||
| Short-circuit duration | T1OUT, T2OUT | Unlimited | |||||
| TJ | Operating virtual junction temperature | 150 | °C | ||||
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to network GND.
5.2 ESD Ratings
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| Tstg | Storage temperature range | -65 | 150 | °C | |
| V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) | 0 | 2000 | V |
| Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) | 0 | 1000 | |||
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
5.3 Recommended Operating Conditions
| MIN | NOM | MAX | UNIT | ||||
|---|---|---|---|---|---|---|---|
| VCC | Supply voltage | 4.5 | 5 | 5.5 | V | ||
| VIH | High-level input voltage (T1IN,T2IN) | 2 | V | ||||
| VIL | Low-level input voltage (T1IN, T2IN) | 0.8 | V | ||||
| R1IN, R2IN | Receiver input voltage | ±30 | V | ||||
| TA | Operating free-air temperature | MAX232 | 0 | 70 | °C | ||
| MAX232I | –40 | 85 | |||||
5.4 Thermal Information
| THERMAL METRIC(1) | SOIC (D) | SOIC wide (DW) | PDIP (N) | SOP (NS) | UNIT | |
|---|---|---|---|---|---|---|
| 16 PINS | 16 PINS | 16 PINS | 16 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 84.6 | 71.7 | 60.6 | 88.5 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 43.5 | 37.6 | 48.1 | 46.2 | °C/W |
| RθJB | Junction-to-board thermal resistance | 43.2 | 36.8 | 40.6 | 50.7 | °C/W |
| ψJT | Junction-to-top characterization parameter | 10.4 | 13.3 | 27.5 | 13.5 | °C/W |
| ψJB | Junction-to-board characterization parameter | 42.8 | 36.4 | 40.3 | 50.3 | °C/W |
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).
5.5 Electrical Characteristics, Device
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 8-1)
| PARAMETER | TEST CONDITIONS(2) | MIN | TYP(1) | MAX | UNIT | |||
|---|---|---|---|---|---|---|---|---|
| ICC | Supply current | VCC = 5.5V, all outputs open, TA = 25°C | 8 | 10 | mA | |||
(1) All typical values are at VCC = 5V, and TA = 25°C.
(2) Test conditions are C1–C4 = 1μF at VCC = 5V ± 0.5V
