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

SLLS616B − APRIL 2004 − REVISED APRIL 2008

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Qualified for Automotive Applications

D Operates With 3-V to 5.5-V V

Supply

D Operates Up To 1 Mbit/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 RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

D Auto-Powerdown Feature Automatically

Disables Drivers for Power Savings

D Applications

− Battery-Powered, Hand-Held, and

Portable Equipment

− PDAs and Palmtop PCs

− Notebooks, Sub-Notebooks, and Laptops

− Digital Cameras

− Mobile Phones and Wireless Devices

description/ordering information

The SN65C3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV ESD

protection pin to pin (serial-port connection pins, including GND). This device 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 up to 1 Mbit/s and a driver output slew rate of 24 V/µs to 150 V/µs.

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 on the receiver input, the driver output is disabled.

If FORCEOFF

is set low and EN is high, both the driver and receiver are shut off, and the supply current is

reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown

condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF

are high. With

auto-powerdown enabled, the device is activated automatically when a valid signal is applied to the receiver

input. The INVALID

output notifies the user if an RS-232 signal is present at the receiver input. INVALID is high

(valid data) if the 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 the receiver input voltage is between −0.3 V and

0.3 V for more than 30 µs. See Figure 5 for receiver input levels.

ORDERING INFORMATION

{

PACKAGE

‡

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

−40°C to 85°C

TSSOP (PW) Reel of 2000 SN65C3221IPWRQ1 3221Q1

−40

C to 85

SSOP (DB) Reel of 2000 SN65C3221IDBRQ 3221Q1

†

For the most current package and ordering information, see the Package Option Addendum at the end of this

document, or see the TI web site at http://www.ti.com.

‡

Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.

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.

DB or PW PACKAGE

(TOP VIEW)

C1+

V+

C1−

C2+

C2−

V−

RIN

FORCEOFF

GND

DOUT

FORCEON

DIN

INVALID

ROUT

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Summary of content (17 pages)

PAGE 1
SLLS616B − APRIL 2004 − REVISED APRIL 2008 D D D D D D D D D DB or PW PACKAGE (TOP VIEW) Qualified for Automotive Applications Operates With 3-V to 5.5-V VCC Supply Operates Up To 1 Mbit/s Low Standby Current . . . 1 µA Typical External Capacitors . . . 4 × 0.1 µF Accepts 5-V Logic Input With 3.
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 Function Tables EACH DRIVER INPUTS DIN FORCEON FORCEOFF VALID RIN RS-232 LEVEL OUTPUT DOUT DRIVER STATUS X X L X Z Powered off L H H X H H H H X L Normal operation with auto-powerdown disabled L L H Yes H H L H Yes L L L H No Z H L H No Z Normal operation with auto-powerdown enabled Powered off by auto-powerdown feature H = high level, L = low lev
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 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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SLLS616B − APRIL 2004 − REVISED APRIL 2008 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 TEST CONDITIONS MIN TYP† MAX UNIT VOH High-level output voltage DOUT at RL = 3 kΩ to GND, DIN = GND 5 5.4 V VOL Low-level output voltage DOUT at RL = 3 kΩ to GND, DIN = VCC −5 −5.
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 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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SLLS616B − APRIL 2004 − REVISED APRIL 2008 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 voltage FORCEO
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION 3V Generator (see Note B) Input RS-232 Output 50 Ω RL tTHL CL (see Note A) 3V FORCEOFF TEST CIRCUIT 0V tTLH −3 V −3 V 6V SR(tr) + t THL or t TLH VOH 3V 3V Output VOL VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B.
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION 3V Input 3 V or 0 V FORCEON VCC S1 1.5 V GND −3 V tPZH (S1 at GND) tPHZ (S1 at GND) RL 3 V or 0 V 1.5 V VOH Output 50% Output CL (see Note A) EN Generator (see Note B) 50 Ω 0.3 V tPZL (S1 at VCC) tPLZ (S1 at VCC) 0.3 V Output 50% VOL TEST CIRCUIT NOTES: A. B. C. D. VOLTAGE WAVEFORMS CL includes probe and jig capacitance.
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SLLS616B − APRIL 2004 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION 2.7 V 2.7 V 0V Receiver Input 0V ROUT Generator (see Note B) 3V −2.7 V −2.7 V 50 Ω tinvalid −3 V tvalid VCC Autopowerdown INVALID CL = 30 pF (see Note A) FORCEOFF FORCEON DIN DOUT 50% VCC INVALID Output 50% VCC 0V ten ≈V+ V+ 0.3 V VCC 0V 0.
PAGE 10
SLLS616B − APRIL 2004 − REVISED APRIL 2008 APPLICATION INFORMATION EN 1 16 2 VCC C1+ 15 + 3 C1 + + − − V+ Autopowerdown C3† 4 GND − 14 6 C2− 7 − RIN 12 C2 11 V− 10 C4 + DOUT C2+ + − CBYPASS = 0.1 µF C1− 13 5 FORCEOFF 8 9 FORCEON DIN INVALID ROUT 5 kΩ † C3 can be connected to VCC or GND. NOTE A: Resistor values shown are nominal. VCC vs CAPACITOR VALUES VCC C1 C2, C3, and C4 3.3 V ± 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device 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 SN65C3221IPWRG4Q1 TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN65C3221IPWRQ1 TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN65C3221IPWRG4Q1 TSSOP PW 16 2000 367.0 367.0 35.0 SN65C3221IPWRQ1 TSSOP PW 16 2000 367.0 367.0 35.
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