MAX3246E

` ESD Protection for RS-232 I/O Pins (MAX3222E/MAX3232E/MAX3241E/MAX3246E) ±15kV-Human Body Model ±8kV-IEC 1000-4-2, Contact Discharge ±9kV (MAX3246E Only)-IEC 1000-4-2, Contact Discharge ±15kV-IEC 1000-4-2, Air-Gap Discharge
` ESD Protection for all Logic and Receiver I/O Pins (MAX3237E) ±15kV-Human Body Model ±8kV-IEC 1000-4-2, Contact Discharge ±15kVIEC 1000-4-2, Air-Gap Discharge
` ESD Protection for Transmitter Output Pins (MAX3237E) ±15kV-Human Body Model
` Guaranteed Data Rate 250kbps (MAX3222E/MAX3232E/MAX3241E/ MAX3246E/MAX3237E, Normal Operation) 1Mbps (MAX3237E, MegaBaud Operation)
` Latchup Free
` Low-Power Shutdown with Receivers Active 1A (MAX3222E/MAX3241E/MAX3246E) 10nA (MAX3237E)
` Flow-Through Pinout (MAX3237E)
` Guaranteed Mouse Drivability (MAX3241E)
` Meets EIA/TIA-232 Specifications Down to +3.0V

V_CC to GND.............................................................-0.3V to +6V
V+ to GND (Note 1) ................................................-0.3V to +7V
V- to GND (Note 1) .................................................+0.3V to -7V
V+ + |V-| (Note 1)..............................................................+13V
Input Voltages
T_IN, EN, SHDN, MBAUD to GND ............................-0.3V to +6V
R_IN to GND ....................................................................±25V
Output Voltages
T_OUT to GND...............................................................±13.2V
R_OUT, R_OUTB (MAX3241E)....................-0.3V to (V_CC + 0.3V)
Short-Circuit Duration, T_OUT to GND.....................Continuous
Continuous Power Dissipation (T_A = +70)
16-Pin SSOP (derate 7.14mW/ above +70) ...........571mW
16-Pin Wide SO (derate 9.52mW/ above +70) ......762mW
18-Pin Wide SO (derate 9.52mW/ above +70) ......762mW
18-Pin PDIP (derate 11.11mW/ above +70)...........889mW
20-Pin TSSOP (derate 10.9mW/ above +70) .........879mW
20-Pin SSOP (derate 8.00mW/ above +70) ...........640mW
28-Pin SSOP (derate 9.52mW/ above +70) ...........762mW
28-Pin Wide SO (derate 12.50mW/ above +70) ..........1W
28-Pin TSSOP (derate 12.8mW/ above +70) .......1026mW
32-Lead QFN (derate 23.2mW/ above +70) ........1860mW
6 x 6 UCSP (derate 12.6mW/ above +70)............1010mW
Operating Temperature Ranges
MAX32_ _EC_ _ ...................................................0 to +70
MAX32_ _EE_ _.................................................-40 to +85
Storage Temperature Range ..........................-65 to +150
Lead Temperature (soldering, 10s) ..............................+300
Bump Reflow Temperature (Note 2)
Infrared, 15s.................................................................+200
Vapor Phase, 20s..........................................................+215
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed.

The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24 communications interface devices feature low power consumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmitter output pins are protected to ±15kV using the Human Body Model.

A proprietary low-dropout transmitter output stage delivers true RS-232 performance of the MAX3246E from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1F capacitors for operation from a +3.3V supply. Each device guarantees operation at data rates of 250kbps while maintaining RS-232 output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232- compliant output levels.

The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1A shutdown mode that reduces power consumption in battery-powered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1A of supply current. The MAX3222E and MAX3232E are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively.

The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/ three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shutdown mode in which all receivers remain active, while consuming only 1A (MAX3241E/MAX3246E) or 10nA (MAX3237E).

The MAX3222E, MAX3232E, and MAX3241E are available in space-saving SO, SSOP, and TSSOP packages.

The MAX3237E is offered in an SSOP package. The MAX3246E is offered in the ultra-small 6 x 6 UCSP™ package.