Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsInterface ICsInterface IC - transceivers RS232 3/5 VQFN 32

NC – No internal connection

C1–

V+

C1+

FORCEOFF

GND

DOUT1

DIN2

C2+

C2–

V–

DIN1

INVALID

DIN3

DOUT2

DOUT3

RIN1

RIN2

RIN3

RIN4

RIN5

ROUT1

ROUT2

ROUT3

ROUT4

ROUT5

FORCEON

151413

1211

RSM PACKAGE

(TOP VIEW)

TRS3253E

www.ti.com

SLLS850B –JANUARY 2008–REVISED NOVEMBER 2009

RS-232 TRANSCEIVER WITH SPLIT SUPPLY PIN FOR LOGIC SIDE

Check for Samples: TRS3253E

FEATURES

• V

Pin for Compatibility With Mixed-Voltage

Systems Down to 1.8 V on Logic Side

• Enhanced ESD Protection on RIN Inputs and

DOUT Outputs

– ±8 kV IEC 61000-4-2 Air-Gap Discharge

– ±8 kV IEC 61000-4-2 Contact Discharge

– ±15 kV Human-Body Model

• Low 300-μA Supply Current

• Specified 1000-kbps Data Rate

• Auto Powerdown Plus Feature

APPLICATIONS

• Hand-Held Equipment

• PDAs

• Cell Phones

• Battery-Powered Equipment

• Data Cables

DESCRIPTION/ORDERING INFORMATION

The TRS3253E is a three-driver and five-receiver RS-232 interface device, with split supply pins for mixed-signal

operations. All RS-232 inputs and outputs are protected to ±8 kV using the IEC 61000-4-2 Air-Gap Discharge

method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model.

The charge pump requires only four small 0.1-μF capacitors for operation from a 3.3-V supply. The TRS3253E is

capable of running at data rates up to 1000 kbps, while maintaining RS-232-compliant output levels.

The TRS3253E has a unique V

pin that allows operation in mixed-logic voltage systems. Both driver in (DIN)

and receiver out (ROUT) logic levels are pin programmable through the V

pin. This eliminates the need for

additional voltage level shifter while interfacing with low-voltage microcontroller or UARTs. The TRS3253E is

available in a space-saving QFN package (4 mm × 4 mm RSM).

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

PACKAGE

(1) (2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

–40°C to 85°C QFN – RSM TRS3253EIRSMR RS53EI

(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(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.

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.

Summary of content (17 pages)

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TRS3253E www.ti.com SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 RS-232 TRANSCEIVER WITH SPLIT SUPPLY PIN FOR LOGIC SIDE Check for Samples: TRS3253E FEATURES 1 • • • • VL Pin for Compatibility With Mixed-Voltage Systems Down to 1.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.
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TRS3253E www.ti.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.com TERMINAL FUNCTIONS TERMINAL NAME RSM C1+, C2+ 29, 1 V+ 30 DESCRIPTION Positive terminal of the voltage-doubler charge-pump capacitor 5.5-V supply generated by the charge pump C1–, C2- 31, 2 INVALID 6 Invalid Output Pin V– 3 –5.5-V supply generated by the charge pump DIN1 DIN2 DIN3 4 5 7 Driver inputs ROUT5 ROUT1 10, 11, 12, 13, 14 VL 15 Negative terminal of the voltage-doubler charge-pump capacitor Receiver outputs.
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TRS3253E www.ti.com SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 RECOMMENDED OPERATING CONDITIONS MIN MAX VCC Supply voltage 3 5.5 V VL Supply voltage 1.65 VCC V Input logic threshold low Input logic threshold high DIN, FORCEOFF, FORCEON DIN, FORCEOFF, FORCEON Operating temperature VL = 3 V or 5.5 V 0.8 VL = 2.3 V 0.6 VL = 1.65 V 0.5 UNIT V VL = 5.5 V 2.4 VL = 3 V 2.0 VL = 2.7 V 1.4 VL = 1.95 V 1.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.com RECEIVER SECTION Electrical Characteristics over operating free-air temperature range, VCC = VL = 3 V to 5.5 V, C1–C4 = 0.1 μF (tested at 3.3 V ± 10%), C1 = 0.047 μF, C2–C4 = 0.33 μF (tested at 5 V ± 10%), TA = TMIN to TMAX (unless otherwise noted) PARAMETER TEST CONDITIONS Ioff Output leakage current ROUT, receivers disabled VOL Output voltage low IOUT = 1.
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TRS3253E www.ti.com SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 DRIVER SECTION Electrical Characteristics over operating free-air temperature range, VCC = VL = 3 V to 5.5 V, C1–C4 = 0.1 μF (tested at 3.3 V ± 10%), C1 = 0.047 μF, C2–C4 = 0.33 μF (tested at 5 V ± 10%), TA = TMIN to TMAX (unless otherwise noted) PARAMETER TEST CONDITIONS VOH Output voltage swing All driver outputs loaded with 3 kΩ to ground, VCC= 3.1V to 5.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.com AUTO-POWERDOWN SECTION Electrical Characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6) PARAMETER TEST CONDITIONS MIN VIT+(valid) Receiver input threshold for INVALID high-level output voltage FORCEON = GND, FORCEOFF = VL VIT–(valid) Receiver input threshold for INVALID high-level output voltage FORCEON = GND, FORCEOFF = VL –2.
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TRS3253E www.ti.com SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 APPLICATION INFORMATION C1+ + C2 C4 - V+ C2+ C2- VCC V- - GND + C3† + - + CBYPASS - = 0.1 μF C1 C1RIN1 FORCEON AutoPowerdown Plus RIN2 RS-232 Inputs + RIN3 RIN4 FORCEOFF RIN5 INVALID DOUT1 RS-232 Outputs DOUT2 ROUT1 5 kΩ ROUT2 DOUT3 5 kΩ DIN3 ROUT3 Logic Outputs 5 kΩ Logic Inputs DIN2 ROUT4 5 kΩ ROUT5 DIN1 5 kΩ † C3 can be connected to VCC or GND. NOTES: A. Resistor values shown are nominal. B.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.com PARAMETER MEASUREMENT INFORMATION A. CL includes probe and jig capacitance. B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. 3V Generator (see Note B) Input RS-232 Output 50 Ω RL tTHL CL (see Note A) 3V FORCEOFF TEST CIRCUIT 0V tTLH 3V 3V Output −3 V −3 V 6V SR(tr) + t THL or tTLH VOH VOL VOLTAGE WAVEFORMS Figure 2. Driver Slew Rate C.
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TRS3253E www.ti.com SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 PARAMETER MEASUREMENT INFORMATION (continued) 3V Input VCC 3 V or 0 V FORCEON GND 1.5 V 0V S1 tPHZ (S1 at GND) RL 3 V or 0 V 1.5 V tPZH VOH Output 50% Output CL (see Note A) FORCEOFF Generator (see Note B) 0.3 V tPZL (S1 at VCC) tPLZ (S1 at VCC) 50 Ω 0.3 V Output 50% VOL TEST CIRCUIT VOLTAGE WAVEFORMS Figure 5.
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TRS3253E SLLS850B – JANUARY 2008 – REVISED NOVEMBER 2009 www.ti.com ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ PARAMETER MEASUREMENT INFORMATION (continued) Valid RS-232 Level, INVALID High ROUT Generator (see Note B) 2.7 V 50 Ω Indeterminate 0.3 V 0V −0.3 V Indeterminate Autopowerdown Plus INVALID −2.
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PACKAGE OPTION ADDENDUM www.ti.com 8-Dec-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing TRS3253EIRSMR ACTIVE VQFN RSM Pins Package Eco Plan (2) Qty 32 3000 Green (RoHS & no Sb/Br) Lead/Ball Finish CU NIPDAU MSL Peak Temp (3) Level-2-260C-1 YEAR (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.
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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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.