TEXAS INSTRUMENTS MAX3237E Technical data

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1 2 3 4 5 6 7 8 9 10 11 12 13 14

28 27 26 25 24 23 22 21 20 19 18 17 16 15

C2+

GND

C2−

V− DOUT1 DOUT2 DOUT3

RIN1 RIN2

DOUT4

RIN3

DOUT5

SHDN

C1+ V+ V

C1− DIN1 DIN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3 DIN5 ROUT1B MBAUD

DB, DW, OR PW PACKAGE

(TOP VIEW)

QFN PACKAGE

(TOP VIEW)

C1– DIN1 IN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3

DOUT1 DOUT2 DOUT3

RIN1 RIN2

DOUT4

RIN3

V−

C2–

GND

C2+

C1+V+VCCNC

DOUT5

SHDN

MBAUD

DIN5

1 2 3 4 5 6 7 8

24 23 22 21 20 19 18 17

3132 30 29 28 27 26 25

109 111213 14 15 16

3-V TO 5.5-V MULTICHANNEL RS-232

1-MBit/s LINE DRIVER/RECEIVER

SLLS709A – MAY 2006 – REVISED OCTOBER 2006

FEATURES

• Meets or Exceeds the Requirements of • ESD Protection for RS-232 I/O Pins and Logic

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

• Operates With 3-V to 5.5-V V

• Operates From 250 kbits/s to 1 Mbit/s – ± 8 kV – IEC61000-4-2, Contact Discharge

• Low Standby Current . . . 1 µ A Typical – ± 15 kV – IEC61000-4-2, Air-Gap Discharge

• External Capacitors . . . 4 × 0.1 µ F

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

• Designed to Be Interchangeable With Maxim

MAX3237E

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

Supply – ± 15 kV – Human-Body Model (HBM)

APPLICATIONS

• Battery-Powered, Hand-Held, and Portable

Equipment

• PDAs and Palmtop PCs

• Notebooks, Sub-Notebooks, and Laptops

• Digital Cameras

• Mobile Phones and Wireless Devices

MAX3237E

DESCRIPTION

The MAX3237E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ± 15-kV ESD 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. The charge pump and four small external capacitors allow operation from a single 3-V to

5.5-V supply. This device operates at data signaling rates of 250 kbit/s in normal operating mode (MBAUD = GND) and 1Mbit/s when MBAUD = V

DESCRIPTION (CONTINUED)

The MAX3237E transmitters are disabled and the outputs are forced into high-impedance state when the device is in shutdown mode ( SHDN = GND) and the supply current falls to less than 1 µ A. Also, during shutdown, the onboard charge pump is disabled; V+ is lowered to V can be placed in the high-impedance state by setting enable ( EN) high. ROUT1B remains active all the time, regardless of the EN and SHDN condition.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

. The driver output slew rate is a maximum of 30 V/ µ s.

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.

, and V– is raised toward GND. Receiver outputs also

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MAX3237E 3-V TO 5.5-V MULTICHANNEL RS-232 1-MBit/s LINE DRIVER/RECEIVER

SLLS709A – MAY 2006 – REVISED OCTOBER 2006

The MAX3237EC is characterized for operation from 0 ° C to 70 ° C. The MAX3237EI is characterized for operation from –40 ° C to 85 ° C.

AVAILABLE OPTIONS

0 ° C to 70 ° C

–40 ° C to 85 ° C

FUNCTION TABLE

INPUTS OUTPUTS

SHDN EN DOUT ROUT ROUT1B

0 0 Z 0 1 Z 1 0 Active Active Active 1 1 Active Z

PACKAGED DEVICES

MAX3237ECDBR

MAX3237ECPWR

MAX3237ECRHBR (QFN package)

MAX3237ECDWR

MAX3237EIDBR

MAX3237EIPWR

MAX3237EIRHBR (QFN package)

MAX3237EIDWR

(1) (1)

Active Active

(1)

Active

(1) Z = high impedance (off)

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DIN3

DIN2

DIN1

DOUT3

DOUT2

DOUT1

RIN1

RIN2

RIN3

ROUT1

ROUT1B

ROUT2

ROUT3

DIN4

DOUT4

19 10

DIN5

DOUT5

17 12

SHDN

MBAUD

LOGIC DIAGRAM (POSITIVE LOGIC)

MAX3237E

3-V TO 5.5-V MULTICHANNEL RS-232

1-MBit/s LINE DRIVER/RECEIVER

SLLS709A – MAY 2006 – REVISED OCTOBER 2006

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MAX3237E 3-V TO 5.5-V MULTICHANNEL RS-232 1-MBit/s LINE DRIVER/RECEIVER

SLLS709A – MAY 2006 – REVISED OCTOBER 2006

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

V+ Positive-output supply voltage range V– Negative-output supply voltage range V+ – V– Supply voltage difference

stg

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings

(2) All voltages are with respect to network GND. (3) The package thermal impedance is calculated in accordance with JESD 51-7.

Supply voltage range

Input voltage range V

Output voltage range V

Short-circuit duration DOUT to GND Unlimited Package thermal impedance Lead temperature 1,6 mm (1/16 in) from case for 10 s 260 ° C Storage temperature range –65 150 ° C

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.

(1)

MIN MAX UNIT

(2)

–0.3 6 V –0.3 7 V

0.3 –7 V

Driver ( SHDN, MBAUD, EN) –0.3 6 Receiver –25 25 Driver –13.2 13.2 Receiver –0.3 V

(3)

13 V

+ 0.3

62 ° C/W

Recommended Operating Conditions

(1)

See Figure 5

MIN NOM MAX UNIT

= 3.3 V 3 3.3 3.6

Supply voltage V

Driver and control high-level input voltage DIN, SHDN, MBAUD, EN V

Driver and control low-level input voltage DIN, SHDN, MBAUD, EN 0 0.8 V

Receiver input voltage –25 25 V

Operating free-air temperature ° C

(1) Test conditions are C1–C4 = 0.1 µ F at V

Electrical Characteristics

(1)

= 3 V to 5 V.

= 5 V 4.5 5 5.5

= 3.3 V 2 5.5

= 5 V 2.4 5.5

MAX3237EC 0 70 MAX3237EI –40 85

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5 )

PARAMETER TEST CONDITIONS MIN TYP

Input leakage current DIN, SHDN, MBAUD, EN 9 18 µ A

Supply current SHDN = GND 1 10 µ A (T

= 25 ° C)

(1) Test conditions are C1–C4 = 0.1 µ F at V (2) All typical values are at V

= 3.3 V or V

Shutdown supply current

= 3 V to 5 V.

= 5 V, and TA= 25 ° C.

No load, SHDN = V

SHDN = RIN = GND, DIN = GND or V

(2)

MAX UNIT

0.5 2 mA

10 300 nA

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MAX3237E

3-V TO 5.5-V MULTICHANNEL RS-232

1-MBit/s LINE DRIVER/RECEIVER

SLLS709A – MAY 2006 – REVISED OCTOBER 2006

DRIVER SECTION

xxx

Electrical Characteristics

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5 )

PARAMETER TEST CONDITIONS MIN TYP

V V I I I r

(1) Test conditions are C1–C4 = 0.1 µ F at V (2) All typical values are at V (3) Short-circuit durations should be controlled to prevent exceeding the device absolute power-dissipation ratings, and not more than one

High-level output voltage DOUT at RL= 3 k Ω to GND, DIN = GND 5 5.4 V

Low-level output voltage DOUT at RL= 3 k Ω to GND, DIN = V

High-level input current VI= V

Low-level input current VIat GND ± 0.01 ± 1 µ A

Short-circuit output current

Output resistance VCC, V+, and V– = 0 V, VO= ± 2 V 300 50k Ω

output should be shorted at a time.

= 3.3 V or V

(1)

(2)

MAX UNIT

(3)

= 3.6 V or 3.3 V, VO= 0 V ± 60 mA

= 3 V to 5 V.

= 5 V, and TA= 25 ° C.

–5 –5.4 V

± 0.01 ± 1 µ A

Switching Characteristics

(1)

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5 )

PARAMETER TEST CONDITIONS MIN TYP

CL= 1000 pF, MBAUD = GND

CL= 1000 pF, Maximum data V rate MBAUD = V

= 4.5 V to 5.5 V, RL= 3 k Ω , 1 DIN switching, 1000

See Figure 1

CL= 250 pF,

= 3 V to 4.5 V, 1000

MBAUD = V

Pulse skew

sk(p)

(3)

Slew rate, V

SR(tr) transition region RL= 3 k Ω to 7 k Ω , MBAUD = V

CL= 150 pF to 2500 pF, RL= 3 k Ω to 7 k Ω ,

MBAUD = V

(see Figure 1 ) TA= 25 ° C

(1) Test conditions are C1–C4 = 0.1 µ F at V (2) All typical values are at V (3) Pulse skew is defined as |t

= 3.3 V or V

PLH

or GND, See Figure 2

= 3.3 V,

= 3 V to 5 V.

= 5 V, and TA= 25 ° C.

– t

| of each channel of the same device.

PHL

CL= 150 pF to 1000 pF

MBAUD = GND 6 30

CL= 150 pF to 2500 pF, MBAUD = GND 4 30

250

24 150 V/ µ s

(2)

MAX UNIT

100 ns

kbit/s

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