MAX3238E_技术文档

MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

FEATURES

DB, DW, OR PW PACKAGE

•

RS-232 Bus-Pin ESD Protection Exceeds

(TOP VIEW)

±15 kV Using Human-Body Model (HBM)

C2+

GND

C2−

C1+

27 V+

26

1

28

•

Meets or Exceeds the Requirements of

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

2

3

V

CC

•

Operates With 3-V to 5.5-V V_CCSupply

Operates up to 400 kbit/s

V−

4

25 C1−

DOUT1

DOUT2

DOUT3

RIN1

5

24 DIN1

Five Drivers and Three Receivers

6

23

22

21

20

19

18

17

16

15

DIN2

Auto-Powerdown Plus Feature Enables

Flexible Power-Down Mode

7

DIN3

8

ROUT1

ROUT2

DIN4

9

RIN2

DOUT4

RIN3

•

Low Standby Current . . . 1 µA Typical

External Capacitors . . . 4 × 0.1 µF

10

11

12

13

14

ROUT3

DIN5

Accepts 5-V Logic Input With 3.3-V Supply

DOUT5

FORCEON

FORCEOFF

Always-Active Noninverting Receiver Output

(ROUT1B)

ROUT1B

INVALID

•

Alternative High-Speed Pin-Compatible

Device (1 Mbit/s) for SNx5C3238

ESD Protection for RS-232 Interface Pins

– ±15 kV – Human-Body Model (HBM)

– ±8 kV – IEC61000-4-2, Contact Discharge

– ±15 kV – IEC61000-4-2, Air-Gap Discharge

RHB PACKAGE

(TOP VIEW)

APPLICATIONS

32 31 30 29 28 27 26 25

•

Battery-Powered Systems

PDAs

Notebooks

Subnotebooks

Laptops

Palmtop PCs

Hand-Held Equipment

Modems

1

2

3

4

5

6

7

8

24

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

C1–

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

23

22

21

20

19

18

17

NC

ROUT3

9 10 11 12 13 14 15 16

Printers

DESCRIPTION/ORDERING INFORMATION

The MAX3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV

ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the

requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook

computer applications. 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 (ROUT1B), which allows

applications using the ring indicator to transmit data while the device is powered down. This 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.

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.

MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

DESCRIPTION/ORDERING INFORMATION (CONTINUED)

Flexible control options for power management are featured when the serial port and driver inputs are inactive.

The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode

of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for

approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to

1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there

is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and

FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically when a valid signal

is applied to any receiver or driver input. INVALID is high (valid data) if any receiver input voltage is greater than

2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid

data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for

receiver input levels.

ORDERING INFORMATION

T_A

PACKAGE⁽¹⁾

ORDERABLE PART NUMBER

MAX3238ECDB

TOP-SIDE MARKING

Tube of 50

SSOP – DB

MAX3238EC

Reel of 2000

Tube of 50

MAX3238ECDBR

MAX3238ECPW

0°C to 70°C

TSSOP – PW

MP238EC

Reel of 2000

Tube of 50

MAX3238ECPWR

MAX3238ECDWR

MAX3238ECRHBR

MAX3238EIDB

SOIC – DW

QFN – RHB

MAX3238EC

Preview

SSOP – DB

MAX3238EI

MP238EI

Reel of 2000

Tube of 50

MAX3238EIDBR

MAX3238EIPW

–40°C to 85°C

TSSOP – PW

Reel of 2000

MAX3238EIPWR

MAX3238ICDWR

MAX3238EIRHBR

SOIC – DW

QFN – RHB

MAX3238EI

Preview

(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

2

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

FUNCTION TABLES

abc

Each Driver⁽¹⁾

INPUTS

OUTPUT

DOUT

DRIVER STATUS

TIME ELAPSED SINCE LAST

RIN OR DIN TRANSITION

DIN

FORCEON

FORCEOFF

X

L

X

H

L

X

Z

H

L

Powered off

H

X

Normal operation with

auto-powerdown plus disabled

H

L

X

<30 s

>30 s

H

L

Normal operation with

auto-powerdown plus enabled

H

L

Z

Powered off by

auto-powerdown plus feature

H

L

(1) H = high level, L = low level, X = irrelevant, Z = high impedance

Each Receiver⁽¹⁾

INPUTS

FORCEOFF

OUTPUTS

RECEIVER STATUS

TIME ELAPSED SINCE LAST

RIN OR DIN TRANSITION

ROUT2 AND

ROUT3

RIN1

RIN2–RIN3

ROUT1B

L

H

X

L

X

L

H

L

Z

H

L

Powered off while

ROUT1B is active

X

L

H

<30 s

L

H

L

Normal operation with

auto-powerdown plus

disabled/enabled

H

L

H

L

H

L

H

Open

H

(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off

3

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

LOGIC DIAGRAM (POSITIVE LOGIC)

24

5

DIN1

DOUT1

23

6

7

DIN2

DOUT2

DOUT3

DOUT4

DOUT5

22

DIN3

19

10

12

DIN4

17

DIN5

14

FORCEOFF

15

Auto-powerdown Plus

INVALID

13

FORCEON

16

ROUT1B

21

8

ROUT1

RIN1

20

9

ROUT2

RIN2

RIN3

18

11

ROUT3

4

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

Absolute Maximum Ratings⁽¹⁾

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

MIN

–0.3

0.3

MAX

UNIT

V_CC

V+

Supply voltage range⁽²⁾

Positive-output supply voltage range⁽²⁾

Negative-output supply voltage range⁽²⁾

6

V

7

–7

V–

V+ – V– Supply voltage difference⁽²⁾

13

Driver (FORCEOFF, FORCEON)

Receiver

–0.3

–25

6

V_I

Input voltage range

Output voltage range

V

25

Driver

–13.2

–0.3

13.2

V_CC+ 0.3

62

V_O

Receiver (INVALID)

DB package

DW package

46

θ_JA

Package thermal impedance⁽³⁾⁽⁴⁾

°C/W

PW package

62

RHB package

TBD

150

T_J

Operating virtual junction temperature

Storage temperature range

°C

T_stg

–65

(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.

(3) Maximum power dissipation is a function of T_J(max), θ_JA, and T_A. The maximum allowable power dissipation at any allowable ambient

temperature is P_D= (T_J(max) – T_A)/θ_JA. Operating at the absolute maximum T_Jof 150°C can affect reliability.

(4) The package thermal impedance is calculated in accordance with JESD 51-7.

Recommended Operating Conditions⁽¹⁾

See Figure 6

MIN NOM

MAX UNIT

V_CC= 3.3 V

V_CC= 5 V

V_CC= 3.3 V

V_CC= 5 V

3

4.5

2

3.3

5

3.6

V

Supply voltage

5.5

V

DIN, FORCEOFF,

FORCEON

V_IH

Driver and control high-level input voltage

2.4

0

5.5

V_IL

V_I

Driver and control low-level input voltage

Receiver input voltage

DIN, FORCEOFF, FORCEON

0.8

25

70

85

V

–25

0

MAX3238EC

MAX3238EI

T_A

Operating free-air temperature

°C

–40

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

Electrical Characteristics⁽¹⁾

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)

PARAMETER

TEST CONDITIONS

MIN TYP⁽²⁾

MAX UNIT

I_I

Input leakage current FORCEOFF, FORCEON

±0.01

±1

µA

Auto-powerdown plus

disabled

No load,

0.5

1

2

mA

FORCEOFF and FORCEON at V_CC

Supply current

(T_A= 25°C)

Powered off

No load, FORCEOFF at GND

10

I_CC

No load, FORCEOFF at V_CC

FORCEON at GND,

All RIN are open or grounded

,

µA

Auto-powerdown plus

enabled

1

10

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

(2) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

5

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

DRIVER SECTION

xxx

Electrical Characteristics⁽¹⁾

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)

PARAMETER

TEST CONDITIONS

All DOUT at R_L= 3 kΩ to GND

MIN TYP⁽²⁾MAX UNIT

V_OHHigh-level output voltage

V_OLLow-level output voltage

5

5.4

–5.4

V

All DOUT at R_L= 3 kΩ to GND

V_I= V_CC

–5

I_IH

I_IL

High-level input current

Low-level input current

±0.01

±1

µA

V_Iat GND

V_CC= 3.6 V,

V_O= 0 V

±35 ±60

±40 ±100

10M

I_OS

r_o

Short-circuit output current⁽³⁾

Output resistance

mA

Ω

V_CC= 5.5 V,

V_O= 0 V

V_CC, V+, and V– = 0 V,

V_O= ±2 V

V_O= ±12 V,

V_O= ±10 V,

300

V_CC= 3 V to 3.6 V

±25

I_OZ

Output leakage current

FORCEOFF = GND

µA

V_CC= 4.5 V to 5.5 V

±25

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

(2) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

(3) Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one

output should be shorted at a time.

Switching Characteristics⁽¹⁾

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)

PARAMETER

TEST CONDITIONS

MIN TYP⁽²⁾MAX UNIT

C_L= 1000 pF,

One DOUT switching,

R_L= 3 kΩ,

See Figure 1

Maximum data rate

250

400

100

kbit/s

ns

C_L= 150 pF to 2500 pF,

See Figure 2

R_L= 3 kΩ to 7 kΩ,

t_sk(p)

Pulse skew⁽³⁾

C_L= 150 pF to 1000 pF

C_L= 150 pF to 2500 pF

6

4

30

Slew rate, transition region

(see Figure 1)

V_CC= 3.3 V,

R_L= 3 kΩ to 7 kΩ

SR(tr)

V/µs

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

(2) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

(3) Pulse skew is defined as |t_PLH– t_PHL| of each channel of the same device.

ESD Protection

PARAMETER

TEST CONDITIONS

TYP

±15

±8

UNIT

HBM

DOUT

IEC 61000-4-2, Air-Gap Discharge

IEC 61000-4-2, Contact Discharge

kV

6

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

RECEIVER SECTION

xxx

Electrical Characteristics⁽¹⁾

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)

PARAMETER

High-level output voltage

TEST CONDITIONS

I_OH= –1 mA

MIN

TYP⁽²⁾

MAX UNIT

V_OH

V_OL

V_CC– 0.6

V_CC– 0.1

V

Low-level output voltage

I_OL= 1.6 mA

V_CC= 3.3 V

V_CC= 5 V

0.4

2.4

V

1.5

1.8

V_IT+

Positive-going input threshold voltage

V

V_CC= 3.3 V

V_CC= 5 V

0.6

0.8

1.2

V_IT–

Negative-going input threshold voltage

V

1.5

V_hys

I_OZ

r_i

Input hysteresis (V_IT+– V_IT–

)

0.3

V

Output leakage current (except ROUT1B)

Input resistance

FORCEOFF = 0 V

±0.05

5

±10

µA

kΩ

V_I= ±3 V to ±25 V

3

7

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

(2) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

Switching Characteristics⁽¹⁾

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

PARAMETER

TEST CONDITIONS

C_L= 150 pF, See Figure 3

TYP⁽²⁾UNIT

t_PLHPropagation delay time, low- to high-level output

t_PHLPropagation delay time, high- to low-level output

150

200

50

ns

C_L= 150 pF, See Figure 3

C_L= 150 pF, R_L= 3 kΩ, See Figure 4

See Figure 3

t_en

Output enable time

Output disable time

t_dis

t_sk(p)Pulse skew⁽³⁾

(1) Testing supply conditions are C1–C4 = 0.1 µF at V_CC= 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at V_CC= 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2–C4 = 0.33 µF at V_CC= 5 V ± 0.5 V.

(2) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

(3) Pulse skew is defined as |t_PLH– t_PHL| of each channel of the same device.

ESD Protection

PARAMETER

TEST CONDITIONS

TYP

±15

±8

UNIT

HBM

RIN

IEC 61000-4-2, Air-Gap Discharge

IEC 61000-4-2, Contact Discharge

kV

7

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

AUTO-POWERDOWN PLUS 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

MAX

UNIT

Receiver input threshold

for INVALID high-level output voltage

V_T+(valid)

V_T–(valid)

V_T(invalid)

V_OH

FORCEON = GND, FORCEOFF = V_CC

2.7

V

Receiver input threshold

for INVALID high-level output voltage

FORCEON = GND, FORCEOFF = V_CC

–2.7

–0.3

V

Receiver input threshold

for INVALID low-level output voltage

0.3

0.4

I_OH= –1 mA, FORCEON = GND,

FORCEOFF = V_CC

INVALID high-level output voltage

INVALID low-level output voltage

V_CC– 0.6

I_OL= 1.6 mA, FORCEON = GND,

FORCEOFF = V_CC

V_OL

Switching Characteristics

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

PARAMETER

Propagation delay time, low- to high-level output

Propagation delay time, high- to low-level output

Supply enable time

MIN

TYP⁽¹⁾

0.1

MAX UNIT

t_valid

t_invalid

t_en

µs

50

25

t_dis

Receiver or driver edge to auto-powerdown plus

15

30

60

s

(1) All typical values are at V_CC= 3.3 V or V_CC= 5 V, and T_A= 25°C.

8

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

PARAMETER MEASUREMENT INFORMATION

3 V

Input

RS-232

0 V

Output

Generator

(see Note B)

50 Ω

t

TLH

THL

C

L

R

L

(see Note A)

V

OH

3 V

−3 V

3 V

−3 V

3 V

FORCEOFF

Output

OL

6 V

t_THLor t_TLH

SR(tr) +

TEST CIRCUIT

VOLTAGE WAVEFORMS

A. C_Lincludes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z_O= 50 Ω, 50% duty cycle, t_r≤ 10 ns,

t_f≤ 10 ns.

Figure 1. Driver Slew Rate

3 V

0 V

Input

1.5 V

RS-232

Output

Generator

(see Note B)

50 Ω

C

L

t

PLH

PHL

R

L

(see Note A)

V

OH

3 V

FORCEOFF

50%

Output

OL

TEST CIRCUIT

A. C_Lincludes probe and jig capacitance.

VOLTAGE WAVEFORMS

B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z_O= 50 Ω, 50% duty cycle, t_r≤ 10 ns,

t_f≤ 10 ns.

Figure 2. Driver Pulse Skew

3 V or 0 V

FORCEON

3 V

−3 V

Input

1.5 V

Output

Generator

(see Note B)

t

PLH

PHL

50 Ω

C

L

(see Note A)

3 V

FORCEOFF

V

OH

50%

Output

OL

TEST CIRCUIT

VOLTAGE WAVEFORMS

A. C_Lincludes probe and jig capacitance.

B. The pulse generator has the following characteristics: Z_O= 50 Ω, 50% duty cycle, t_r≤ 10 ns, t_f≤ 10 ns.

Figure 3. Receiver Propagation Delay Times

9

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

PARAMETER MEASUREMENT INFORMATION (continued)

3 V

Input

1.5 V

V

CC

GND

3 V or 0 V

FORCEON

0 V

S1

t

PHZ

R

L

(S1 at GND)

V

OH

3 V or 0 V

Output

50%

Output

0.3 V

C

L

(see Note A)

FORCEOFF

50 Ω

t

PZL

PLZ

(S1 at V )

CC

(S1 at V )

CC

Generator

(see Note B)

0.3 V

Output

50%

V

OL

TEST CIRCUIT

A. C_Lincludes probe and jig capacitance.

B. The pulse generator has the following characteristics: Z_O= 50 Ω, 50% duty cycle, t_r≤ 10 ns, t_f≤ 10 ns.

C. t_PLZand t_PHZare the same as t_dis

D. t_PZLand t_PZHare the same as t_en

VOLTAGE WAVEFORMS

.

Figure 4. Receiver Enable and Disable Times

10

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

PARAMETER MEASUREMENT INFORMATION (continued)

Valid RS-232 Level, INVALID High

ROUT

2.7 V

Generator

(see Note B)

50 Ω

Indeterminate

0.3 V

If Signal Remains Within This Region

For More Than 30 µs, INVALID Is Low

0 V

†

−0.3 V

Indeterminate

Auto-

powerdown

Plus

INVALID

−2.7 V

C = 30 pF

(see Note A)

L

Valid RS-232 Level, INVALID High

†

Auto-powerdown plus disables drivers and reduces

supply current to 1 µA.

FORCEOFF

FORCEON

DIN

DOUT

TEST CIRCUIT

NOTES: A. C includes probe and jig capacitance.

L

B. The pulse generator has the following

characteristics: PRR = 5 kbit/s, Z = 50 Ω, 50%

O

duty cycle, t ≤ 10 ns, t ≤ 10 ns.

r

f

3 V

2.7 V

Receiver

Input

0 V

−2.7 V

−3 V

t

invalid

t

valid

INVALID

Output

V

CC

50%

0 V

3 V to 5 V

Driver

Input

50%

0 V

≈5.5 V

Driver

Output

≈ −5.5 V

t

dis

t

dis

t

en

t

en

V+

V+ −0.3 V

Supply

Voltages

V− +0.3 V

V−

Voltage Waveforms and Timing Diagrams

Figure 5. INVALID Propagation-Delay Times and Supply-Enabling Time

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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH ±15-kV ESD (HBM) PROTECTION

www.ti.com

SLLS710A–FEBRUARY 2006–REVISED APRIL 2006

APPLICATION INFORMATION

+

C

= 0.1 µF

BYPASS

−

28

27

C1+

V+

1

2

C2+

+

−

+

GND

†

C3

C2

+

−

C1

3

4

26

25

24

C2−

V−

V

CC

−

+

C1−

C4

5

6

7

8

9

DIN1

DIN2

DIN3

DOUT1

DOUT2

DOUT3

RIN1

23

22

21

20

ROUT1

ROUT2

RS-232 Port

RIN2

Logic I/Os

5 kΩ

10

11

19

18

DOUT4

RIN3

DIN4

ROUT3

5 kΩ

12

17

16

DOUT5

DIN5

ROUT1B

5 kΩ

Auto-

powerdown

Plus

13

14

15

FORCEON

FORCEOFF

INVALID

V

CC

vs CAPACITOR VALUES

V

CC

C1

C2, C3, and C4

†

C3 can be connected to V or GND.

CC

3.3 V ± 0.15 V

3.3 V ± 0.3 V

5 V ± 0.5 V

0.1 µF

0.22 µF

0.047 µF

0.22 µF

0.1 µF

0.22 µF

0.33 µF

1 µF

NOTES: A. Resistor values shown are nominal.

B. Nonpolarizedceramic capacitors are acceptable. If polarized tantalum

or electrolytic capacitors are used, they should be connected as

shown.

3 V to 5.5 V

Figure 6. Typical Operating Circuit and Capacitor Values

12

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PACKAGE OPTION ADDENDUM

www.ti.com

1-Mar-2007

PACKAGING INFORMATION

Orderable Device

MAX3238ECDB

MAX3238ECDBR

MAX3238ECDW

MAX3238ECDWR

MAX3238ECPW

MAX3238ECPWG4

MAX3238ECPWR

MAX3238ECPWRG4

MAX3238EIDB

Status ⁽¹⁾

ACTIVE

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

SSOP

DB

28

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

SSOP

SOIC

DB

DW

PW

DB

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

20 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

SOIC

1000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TSSOP

SSOP

SOIC

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

MAX3238EIDBR

MAX3238EIDW

DB

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

DW

PW

20 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

MAX3238EIDWR

MAX3238EIPW

SOIC

1000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TSSOP

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

MAX3238EIPWG4

MAX3238EIPWR

MAX3238EIPWRG4

50 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

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.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and

package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS

compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

1-Mar-2007

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 2

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

M

0,15

15

0,25

0,09

5,60

5,00

8,20

7,40

Gage Plane

1

14

0,25

A

0°–ā8°

0,95

0,55

Seating Plane

0,10

2,00 MAX

0,05 MIN

PINS **

14

16

20

24

28

30

38

DIM

6,50

5,90

6,50

5,90

7,50

8,50

7,90

10,50

9,90

10,50 12,90

A MAX

A MIN

6,90

9,90

12,30

4040065 /E 12/01

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.

D. Falls within JEDEC MO-150

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999

PW (R-PDSO-G**)

PLASTIC SMALL-OUTLINE PACKAGE

14 PINS SHOWN

0,30

0,19

M

0,10

0,65

14

8

0,15 NOM

4,50

4,30

6,60

6,20

Gage Plane

0,25

1

7

0°–8°

A

0,75

0,50

Seating Plane

0,10

0,15

0,05

1,20 MAX

PINS **

8

14

16

20

24

28

DIM

3,10

2,90

5,10

4,90

5,10

4,90

6,60

6,40

7,90

9,80

9,60

A MAX

A MIN

7,70

4040064/F 01/97

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.

D. Falls within JEDEC MO-153

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to

discontinue any product or service without notice. Customers should obtain the latest relevant information

before placing orders and should verify that such information is current and complete. All products are sold

subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent

TI deems necessary to support this warranty. Except where mandated by government requirements, testing

of all parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible

for their products and applications using TI components. To minimize the risks associated with customer

products and applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent

right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine,

or process in which TI products or services are used. Information published by TI regarding third-party

products or services does not constitute a license from TI to use such products or services or a warranty or

endorsement thereof. Use of such information may require a license from a third party under the patents or

other intellectual property of the third party, or a license from TI under the patents or other intellectual

property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices.

Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not

responsible or liable for such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for

that product or service voids all express and any implied warranties for the associated TI product or service

and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Following are URLs where you can obtain information on other Texas Instruments products and application

solutions:

Products

Amplifiers

Data Converters

DSP

Interface

Applications

Audio

Automotive

Broadband

Digital Control

Military

amplifier.ti.com

dataconverter.ti.com

dsp.ti.com

interface.ti.com

logic.ti.com

www.ti.com/audio

www.ti.com/automotive

www.ti.com/broadband

www.ti.com/digitalcontrol

www.ti.com/military

Logic

Power Mgmt

Microcontrollers

Low Power Wireless

power.ti.com

microcontroller.ti.com

www.ti.com/lpw

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Wireless

www.ti.com/opticalnetwork

www.ti.com/security

www.ti.com/telephony

www.ti.com/video

www.ti.com/wireless

Mailing Address:

Texas Instruments

Post Office Box 655303 Dallas, Texas 75265


型号：	MAX3238E
厂家：	TEXAS INSTRUMENTS
描述：	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH 【15-kV ESD (HBM) PROTECTION 3V至5.5V多通道RS - 232线路驱动器/接收器【 15千伏ESD （ HBM ）保护驱动器
文件：	总18页 (文件大小：334K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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