TI-TRS3238E.pdf资源-CSDN文库

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www.ti.com

FEATURES

APPLICATIONS

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

N.C.

C1–

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

C2+

GND

C2-

V-

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

DOUT5

FORCEON

FORCEOFF

C1+

V+

C1-

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

DIN5

ROUT1B

INVALID

DB, DW, OR PW PACKAGE

(TOP VIEW)

RHB PACKAGE

(TOP VIEW)

V-

C2–

GND

C2+

C1+

V+

N.C.

DOUT5

FORCEON

FORCEOFF

INVALID

N.C.

ROUT1B

DIN5

N.C.

3132 30 29 28 27 26 25

109 11 12 13 14 15 16

N.C. - Not inter nally connected

DESCRIPTION/ORDERING INFORMATION

TRS3238E

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

WITH ± 15-kV ESD (HBM) PROTECTION

SLLS797 – JUNE 2007

• 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 5.5-V V

Supply

• Operates up to 400 kbit/s

• Five Drivers and Three Receivers

• Auto-Powerdown Plus Feature Enables

Flexible Power-Down Mode

• Low Standby Current . . . 1 μ A Typical

• External Capacitors . . . 4 × 0.1 μ F

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

• Always-Active Noninverting Receiver Output

(ROUT1B)

• Alternative High-Speed Pin-Compatible Device

(1 Mbit/s) for TRSF3238

• 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

• Battery-Powered Systems

• PDAs

• Notebooks

• Subnotebooks

• Laptops

• Palmtop PCs

• Hand-Held Equipment

• Modems

• Printers

The TRS3238E 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/ μ s 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.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

www.ti.com

DESCRIPTION/ORDERING INFORMATION (CONTINUED)

TRS3238E

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

WITH ± 15-kV ESD (HBM) PROTECTION

SLLS797 – JUNE 2007

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 μ A. 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 μ s. INVALID is low (invalid

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

receiver input levels.

ORDERING INFORMATION

PACKAGE

(1) (2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

Tube of 50 TRS3238ECDB

SSOP – DB TRS3238EC

Reel of 2000 TRS3238ECDBR

Tube of 50 TRS3238ECPW

0 ° C to 70 ° C TSSOP – PW RS38EC

Reel of 2000 TRS3238ECPWR

SOIC – DW Reel of 2000 TRS3238ECDWR TRS3238EC

QFN – RHB Reel of 2000 TRS3238ECRHBR PREVIEW

Tube of 50 TRS3238EIDB

SSOP – DB TRS3238EI

Reel of 2000 TRS3238EIDBR

Tube of 50 TRS3238EIPW

–40 ° C to 85 ° C TSSOP – PW RS38EI

Reel of 2000 TRS3238EIPWR

SOIC – DW Reel of 2000 TRS3238ICDWR TRS3238EI

QFN – RHB Reel of 2000 TRS3238EIRHBR PREVIEW

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

www.ti.com/sc/package .

(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com .

Submit Documentation Feedback

www.ti.com

Absolute Maximum Ratings

(1)

Recommended Operating Conditions

(1)

Electrical Characteristics

(1)

TRS3238E

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

WITH ± 15-kV ESD (HBM) PROTECTION

SLLS797 – JUNE 2007

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

MIN MAX UNIT

Supply voltage range

(2)

–0.3 6 V

V+ Positive-output supply voltage range

(2)

–0.3 7 V

V– Negative-output supply voltage range

(2)

0.3 –7 V

V+ – V– Supply voltage difference

(2)

13 V

Driver ( FORCEOFF, FORCEON) –0.3 6

Input voltage range V

Receiver –25 25

Driver –13.2 13.2

Output voltage range V

Receiver ( INVALID) –0.3 V

+ 0.3

DB package 62

DW package 46

Package thermal impedance

(3) (4)

° C/W

PW package 62

RHB package PREVIEW

Operating virtual junction temperature 150 ° C

stg

Storage temperature range –65 150 ° 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.

(3) Maximum power dissipation is a function of T

(max), θ

, and T

. The maximum allowable power dissipation at any allowable ambient

temperature is P

= (T

(max) – T

)/ θ

. Operating at the absolute maximum T

of 150 ° C can affect reliability.

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

See Figure 6

MIN NOM MAX UNIT

= 3.3 V 3 3.3 3.6

Supply voltage V

= 5 V 4.5 5 5.5

= 3.3 V 2 5.5

DIN, FORCEOFF,

Driver and control high-level input voltage V

FORCEON

= 5 V 2.4 5.5

Driver and control low-level input voltage DIN, FORCEOFF, FORCEON 0 0.8 V

Receiver input voltage –25 25 V

TRS3238EC 0 70

Operating free-air temperature ° C

TRS3238EI –40 85

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

= 3.3 V ± 0.15 V; C1–C4 = 0.22 μ F at V

= 3.3 V ± 0.3 V; and C1 = 0.047 μ F

and C2–C4 = 0.33 μ F at V

= 5 V ± 0.5 V.

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

Input leakage current FORCEOFF, FORCEON ± 0.01 ± 1 μ A

Auto-powerdown plus No load,

0.5 2 mA

disabled FORCEOFF and FORCEON at V

Supply current Powered off No load, FORCEOFF at GND 1 10

= 25 ° C)

No load, FORCEOFF at V

μ A

Auto-powerdown plus

FORCEON at GND, 1 10

enabled

All RIN are open or grounded

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

= 3.3 V ± 0.15 V; C1–C4 = 0.22 μ F at V

= 3.3 V ± 0.3 V; and C1 = 0.047 μ F

and C2–C4 = 0.33 μ F at V

= 5 V ± 0.5 V.

(2) All typical values are at V

= 3.3 V or V

= 5 V, and T

= 25 ° C.

Submit Documentation Feedback

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