Datasheet MAX3221IPWR, MAX3221IDBR, MAX3221CPWR, MAX3221CDBR Datasheet (Texas Instruments)

MAX3221

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

D

Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards

D

Operates With 3-V to 5.5-V VCC Supply

D

Operates up to 250 kbit/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

Designed to Be Interchangeable With
Maxim MAX3221

D

RS-232 Bus-Pin ESD Protection Exceeds

DB OR PW PACKAGE

(TOP VIEW)

EN

C1+

V+
C1–
C2+
C2–

V–

RIN

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

FORCEOFF
V

CC

GND
DOUT
FORCEON
DIN
INVALID

9

ROUT

±15-kV Using Human-Body Model (HBM)

D

Applications
– Battery-Powered Systems, PDAs,

Notebooks, Laptops, Palmtop PCs, and
Hand-Held Equipment

D

Package Options Include Plastic Shrink
Small-Outline (DB) and Thin Shrink
Small-Outline (PW) Packages

description

The MAX3221 device 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). 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 . These devices operate at data signaling rates up to 250 kbit/s, and at a maximum of 30-V/µs
driver output slew rate.

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, the driver outputs are disabled. If FORCEOFF
is set low and EN is high, both drivers and receivers 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 any receiver input. The INVALID output
notifies the user if an RS-232 signal is present at any receiver input. INV ALID

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. INV ALID is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than 30 µs.
Refer to Figure 5 for receiver input levels.

The MAX3221C is characterized for operation from 0°C to 70°C. The MAX3221I is characterized for operation
from –40°C to 85°C.

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.

PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.

Copyright  2000, Texas Instruments Incorporated

PRODUCT PREVIEW

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

1

MAX3221

OUTPUT

y

OUTPUT

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

0°C to 70°C MAX3221CDB MAX3221CPW

–40°C to 85°C MAX3221IDB MAX3221IPW

The DB and PW packages are available taped and reeled. Add
the suffix R to device type (e.g., MAX3221CDBR).

SHRINK

SMALL OUTLINE

(DB)

Function Tables

EACH DRIVER

INPUTS

DIN FORCEON

X X L X Z Powered off
L H H X H
H HH XL
L L H Yes H
H LHYesL
L L H No Z
H L H No Z

H = high level, L = low level, X = irrelevant, Z = high impedance

FORCEOFF

VALID RIN

RS-232 LEVEL

THIN SHRINK

SMALL OUTLINE

(PW)

DOUT

auto-powerdown disabled

auto-powerdown enabled

auto-powerdown feature

DRIVER STATUS

Normal operation with

Normal operation with

Powered off by

PRODUCT PREVIEW

logic diagram (positive logic)

DIN

FORCEOFF

FORCEON

ROUT

EACH RECEIVER

INPUTS

RIN EN

L L X H
H LX L
X HX Z

Open L No H

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

11

16

12

9

VALID RIN

RS-232 LEVEL

Auto-powerdown

ROUT

13

10

8

1

DOUT

INVALID

RIN
EN

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MAX3221

Suppl

oltage

V

VIHDriver and control high-level input voltage

,,,

V

TAO erating free-air tem erature

°C

ICCSu ly current

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

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) –0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Negative output supply voltage range, V– (see Note 1) 0.3 V to –7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply voltage difference, V+

– V– (see Note 1) 13 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI: Driver (FORCEOFF, FORCEON, EN) –0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver –25 V to 25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, VO: Driver –13.2 V to 13.2 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver (INVALID) –0.3 V to VCC + 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θJA (see Note 2): DB package 82°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PW package 108°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

†

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.

NOTES: 1. All voltages are with respect to network GND.

2. The package thermal impedance is calculated in accordance with JESD 51.

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

recommended operating conditions (see Note 3 and Figure 6)

MIN NOM MAX UNIT

pp

y v

p

V
V
V

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

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

IL

Driver and control input voltage DIN, FORCEOFF, FORCEON 0 5.5 V

I

Receiver input voltage –25 25 V

I

p

p

DIN, FORCEOFF, FORCEON,
EN

VCC = 3.3 V 3 3.3 3.6
VCC = 5 V 4.5 5 5.5
VCC = 3.3 V 2
VCC = 5 V 2.4

MAX3221C 0 70
MAX3221I –40 85

°

electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)

PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT

I

Input leakage current FORCEOFF, FORCEON, EN ±0.01 ±1 µA

I

Auto-powerdown disabled

pp

‡

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

Powered off No load, FORCEOFF at GND 1 10

Auto-powerdown enabled

No load,
FORCEOFF

No load, FORCEOFF at VCC,
FORCEON at GND,
All RIN are open or grounded

and FORCEON at V

CC

0.3 1 mA

1 10

µA

PRODUCT PREVIEW

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

MAX3221

I

Sh

‡

±35

±60

mA

SR(tr)

g

CC

V/µs

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

DRIVER SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

V

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

OH

V

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

OL

I

High-level input current VI = V

IH

I

Low-level input current VI at GND ±0.01 ±1 µA

IL

OS

r

o

I

off

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

‡

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.

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

ort-circuit output current

Output resistance VCC, V+, and V– = 0 V, VO = ±2 V 300 10M Ω
Output leakage current FORCEOFF = GND, VO = ±12 V, VCC = 0 to 5.5 V ±25 µA

CC

VCC = 3.6 V, VO = 0 V
VCC = 5.5 V, VO = 0 V

CC

–5 –5.4 V

±0.01 ±1 µA

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Maximum data rate CL = 1000 pF, RL = 3 kΩ, See Figure 1 250 kbit/s

t

sk(p)

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

§

Pulse skew is defined as |t

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

Pulse skew
Slew rate, transition region VCC = 3.3 V,

(see Figure 1)

§

– t

PLH

PHL

CL = 150 pF to 2500 pF

RL = 3 kΩ to 7 kΩ

| of each channel of the same device.

RL = 3 kΩ to 7 kΩ
See Figure 2

CL = 150 pF to 1000 pF 6 30
CL = 150 pF to 2500 pF 4 30

100 ns

PRODUCT PREVIEW

4

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MAX3221

V

Positive-going input threshold voltage

V

V

Negative-going input threshold voltage

V

C

150 pF, See Figure 3

C

150 pF, R

See Figure 4

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

RECEIVER SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)

PARAMETER TEST CONDITIONS MIN TYP

V
V

V
I

off

r

i

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

High-level output voltage IOH = –1 mA VCC – 0.6 V VCC – 0.1 V V

OH

Low-level output voltage IOL = 1.6 mA 0.4 V

OL

IT+

IT–

Input hysteresis (V

hys

Output leakage current FORCEOFF = 0 V ±0.05 ±10 µA
Input resistance VI = ±3 V to ±25 V 3 5 7 kΩ

p

p

– V

IT+

) 0.5 V

IT–

VCC = 3.3 V 1.6 2.4
VCC = 5 V 1.9 2.4
VCC = 3.3 V 0.6 1.1
VCC = 5 V 0.8 1.4

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

t

PLH

t

PHL

t

en

t

dis

t

sk(p)

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

‡

Pulse skew is defined as |t

NOTE 3: Test conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Output enable time
Output disable time
Pulse skew

‡

– t

PLH

| of each channel of the same device.

PHL

p

=

L

p

=

L

See Figure 3 50 ns

= 3 kΩ,

L

†

MAX UNIT

150 ns
150 ns
200 ns
200 ns

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PRODUCT PREVIEW

5

MAX3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

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

V

T+(valid)

V

T–(valid)

V

T(invalid)

V

OH

V

OL

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

Receiver input threshold
for INVALID

Receiver input threshold
for INVALID

Receiver input threshold
for (INVALID)

INVALID high-level output voltage

INVALID low-level output voltage

high-level output voltage

high-level output voltage

low-level output voltage

FORCEON = GND,
FORCEOFF

FORCEON = GND,
FORCEOFF

FORCEON = GND,
FORCEOFF

IOH = –1 mA, FORCEON = GND,
FORCEOFF

IOL = 1.6 mA, FORCEON = GND,
FORCEOFF

= V

= V

= V

= V

= V

CC

CC

CC

CC

CC

–2.7 V

–0.3 0.3 V

VCC – 0.6 V

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

PARAMETER MIN TYP†MAX UNIT

t

valid

t

invalid

t

en

†

All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.

Propagation delay time, low- to high-level output 1 µs
Propagation delay time, high- to low-level output 30 µs
Supply enable time 100 µs

TYP

†

MAX UNIT

2.7 V

0.4 V

PRODUCT PREVIEW

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Generator

(see Note B)

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

PARAMETER MEASUREMENT INFORMATION

6V

or t

Input

Output

TLH

t

THL

3 V

–3 V

RS-232
Output

50 Ω

R

L

3 V

FORCEOFF

TEST CIRCUIT VOLTAGE WAVEFORMS

CL
(see Note A)

SR(tr)

+

t

THL

MAX3221

t

TLH

3 V

–3 V

3 V

0 V

V

V

OH

OL

NOTES: A. CL includes probe and jig capacitance.

NOTES: 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.

Generator

(see Note B)

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

Generator

(see Note B)

50 Ω

R

L

3 V

FORCEOFF

TEST CIRCUIT VOLTAGE WAVEFORMS

3 V or 0 V

FORCEON

50 Ω

3 V

FORCEOFF

Figure 1. Driver Slew Rate

RS-232
Output

CL
(see Note A)

Input

Output

Figure 2. Driver Pulse Skew

Input

Output

t

CL
(see Note A)

Output

PHL

1.5 V

t

PHL

50%

1.5 V 1.5 V

50% 50%

1.5 V

t

PLH

50%

t

PLH

3 V

0 V

V

V

3 V

–3 V

V

OH

V

OL

OH

OL

PRODUCT PREVIEW

TEST CIRCUIT VOLTAGE WAVEFORMS

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

Figure 3. Receiver Propagation Delay Times

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7

MAX3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

PARAMETER MEASUREMENT INFORMATION

Input

t

PHZ

(S1 at GND)

Output

0.3 V

t

PLZ

(S1 at VCC)

0.3 V

Output

3 V or 0 V

Generator

(see Note B)

V

3 V or 0 V

FORCEON

EN

50 Ω

TEST CIRCUIT VOLTAGE WAVEFORMS

CC

S1

C
(see Note A)

GND

R

L

Output

L

1.5 V 1.5 V

50%

50%

3 V

–3 V

t

PZH

(S1 at GND)

V

t

PZL

(S1 at VCC)

V

OH

OL

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
C. t
D. t

PLZ
PZL

and t
and t

are the same as t

PHZ

are the same as ten.

PZH

Figure 4. Receiver Enable and Disable Times

PRODUCT PREVIEW

dis

.

8

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

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

PARAMETER MEASUREMENT INFORMATION

MAX3221

Generator

(see Note B)

FORCEOFF

FORCEON

50 Ω

Auto-

powerdown

TEST CIRCUIT

ROUT

INVALID

CL = 30 pF
(see Note A)

DOUTDIN

2.7 V

Receiver

Input

–2.7 V

t

invalid

50% V

INVALID

Output

V+

Supply

Voltages

V–

Valid RS-232 Level, INVALID

2.7 V

0.3 V

–0.3 V

–2.7 V

†

Auto-powerdown disables drivers and reduces supply
current to 1 µA.

If Signal Remains Within This Region

0 V

For More Than 30 µs, INVALID

Valid RS-232 Level, INVALID

CC

VOLTAGE WAVEFORMS

Indeterminate

Indeterminate

t

valid

50% V

t

High

Is Low

High

2.7 V

–2.7 V

CC

en

0.3 V

0.3 V

†

3 V

0 V
0 V

–3 V

V

CC

0 V

≈V+

V

CC

0 V

≈V–

PRODUCT PREVIEW

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 5 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

Figure 5. INVALID Propagation Delay Times and Driver Enabling Time

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9

MAX3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

SLLS348B – JUNE 1999 – REVISED JANUARY 2000

APPLICATION INFORMATION

1

EN

2

RIN

3

+
–

4

5

+
–

6
7

–
+

8

+

C1

–

†

C3 can be connected to VCC or GND.

NOTE A: Resistor values shown are nominal.

C3

C2

C4

C1+

V+

†

C1–

C2+

C2–
V–

5 kΩ

Auto-

powerdown

V

CC

GND

16

15

+
–

14

13

12

11

10

9

FORCEOFF

C

BYPASS

DOUT

FORCEON

DIN

INVALID

ROUT

= 0.1 µF

PRODUCT PREVIEW

Figure 6. Typical Operating Circuit and Capacitor Values

VCC vs CAPACITOR VALUES

V

CC

3.3 V ± 0.3 V
5 V ± 0.5 V

3 V to 5.5 V

C1 C2, C3, and C4

0.1 µF

0.047 µF

0.1 µF

0.1 µF

0.33 µF

0.47 µF

10

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Copyright  2000, Texas Instruments Incorporated