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SLLS350L − APRIL 1999 − REVISED MARCH 2004

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Single-Chip and Single-Supply Interface for

IBM PC/AT Serial Port

D RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

D Meets or Exceeds the Requirements of

TIA/EIA-232-F and ITU v.28 Standards

D Operates With 3-V to 5.5-V V

Supply

D Three Drivers and Five Receivers

D Operates Up To 250 kbit/s

D Designed to Transmit at a Data Rate of

250 kbit/s

D Low Standby Current...1 µA Typical

D External Capacitors ...4 × 0.1 µF

D Accepts 5-V Logic Input With 3.3-V Supply

D Always-Active Noninverting Receiver

Output (ROUT2B)

D Alternative High-Speed Pin-Compatible

Device (1 Mbit/s)

− SNx5C3243

D Serial-Mouse Driveability

D Auto-Powerdown Feature to Disable Driver

Outputs When No Valid RS-232 Signal Is

Sensed

D Applications

− Battery-Powered Systems, PDAs,

Notebooks, Laptops, Palmtop PCs, and

Hand-Held Equipment

description/ordering information

The MAX3243 consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD

(HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the requirements

of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and

the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial

port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation

from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output

(ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down.

The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

C2+

C2−

V−

RIN1

RIN2

RIN3

RIN4

RIN5

DOUT1

DOUT2

DOUT3

DIN3

DIN2

DIN1

C1+

V+

GND

C1−

FORCEON

FORCEOFF

INVALID

ROUT2B

ROUT1

ROUT2

ROUT3

ROUT4

ROUT5

DB, DW, OR PW PACKAGE

(TOP VIEW)

AT, IBM, and PC are trademarks of International Business Machines Corporation.

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Summary of content (22 pages)

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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D D D D DB, DW, OR PW PACKAGE (TOP VIEW) IBM PC/AT Serial Port RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM) Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards Operates With 3-V to 5.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 description/ordering information (continued) Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 EACH RECEIVER INPUTS OUTPUTS RIN2 RIN1, RIN3−RIN5 FORCEOFF VALID RIN RS-232 LEVEL L X L H X L L L L H H L ROUT2B ROUT X L Z X H Z H Yes L H H Yes L L H Yes H H RECEIVER STATUS Powered off while ROUT2B is active H H H Yes H L Open Open H No L H Normal operation with auto-powerdown disabled/enabled H = high level, L = low le
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 6 V Positive output supply voltage range, V+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Note 4 and Figure 6) PARAMETER VOH VOL VO IIH IIL TEST CONDITIONS MIN TYP† MAX UNIT High-level output voltage All DOUT at RL = 3 kΩ to GND 5 5.4 V Low-level output voltage All DOUT at RL = 3 kΩ to GND −5 −5.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 RECEIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Note 4 and Figure 6) PARAMETER VOH VOL TEST CONDITIONS High-level output voltage IOH = −1 mA IOL = 1.6 mA Low-level output voltage VIT+ Positive-going input threshold voltage VCC = 3.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 AUTO-POWERDOWN SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5) PARAMETER TEST CONDITIONS MIN VT+(valid) Receiver input threshold for INVALID high-level output voltage FORCEON = GND, FORCEOFF = VCC VT−(valid) Receiver input threshold for INVALID high-level output v
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 PARAMETER MEASUREMENT INFORMATION 3V Generator (see Note B) RS-232 Output 50 Ω Input 0V CL (see Note A) RL 1.5 V 1.5 V tPHL tPLH VOH 3V FORCEOFF 50% 50% Output VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B.
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± SLLS350L − APRIL 1999 − REVISED MARCH 2004 PARAMETER MEASUREMENT INFORMATION 2.7 V 2.7 V 0V Receiver Input 0V 50 Ω −2.7 V −2.7 V ROUT Generator (see Note B) 3V −3 V tvalid tinvalid VCC INVALID Output Autopowerdown 50% VCC 0V ten INVALID CL = 30 pF (see Note A) ≈V+ V+ 0.3 V VCC 0V 0.
PAGE 10
± SLLS350L − APRIL 1999 − REVISED MARCH 2004 APPLICATION INFORMATION C1+ 1 + C2 − 2 3 V− GND C1− RIN2 RIN3 RIN4 RIN5 DOUT1 RS-232 Outputs VCC + RIN1 RS-232 Inputs C2− DOUT2 4 27 + − 26 25 C3† + CBYPASS − = 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device MAX3243CDBR Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SSOP DB 28 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1 MAX3243CDWR SOIC DW 28 1000 330.0 32.4 11.35 18.67 3.1 16.0 32.0 Q1 MAX3243CPWR TSSOP PW 28 2000 330.0 16.4 6.9 10.2 1.8 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) MAX3243CDBR SSOP DB 28 2000 367.0 367.0 38.0 MAX3243CDWR SOIC DW 28 1000 367.0 367.0 55.0 MAX3243CPWR TSSOP PW 28 2000 367.0 367.0 38.0 MAX3243IDBR SSOP DB 28 2000 367.0 367.0 38.0 MAX3243IDWR SOIC DW 28 1000 366.0 364.0 50.0 MAX3243IDWRG4 SOIC DW 28 1000 367.0 367.0 55.
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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.