Texas Instruments MAX3238CDBR Datasheet

MAX3238

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

SLLS349B – 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

Always-Active Noninverting Receiver
Output (ROUT1B)

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 MAX3238

D

RS-232 Bus-Pin ESD Protection Exceeds
±15-kV Using Human-Body Model (HBM)

D

Applications
– Battery-Powered Systems, PDAs,

Notebooks, Subnotebooks, Laptops,
Palmtop PCs, Hand-Held Equipment,
Modems, and Printers

D

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

DB, DW, OR PW PACKAGE

(TOP VIEW)

C2+

1

GND

2

C2–

3

V–

4

DOUT1
DOUT2
DOUT3

DOUT4

DOUT5

FORCEON

FORCEOFF

RIN1
RIN2

RIN3

5
6
7
8
9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

C1+
V+
V

CC

C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
ROUT3
DIN5
ROUT1B
INVALID

description

The MAX3238 device consists of five line drivers, three line receivers, 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 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. 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 featured when the serial port and driver inputs are inactive.
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF
of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for 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
With auto-powerdown plus enabled, the device automatically activates once 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. INV ALID 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.

The MAX3238C is characterized for operation from 0°C to 70°C. The MAX3238I is characterized for operation
from –40°C to 85°C.

is high. During this mode

PRODUCT PREVIEW

are high.

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  2000, Texas Instruments Incorporated

1

MAX3238

OUTPUT

y

Normal o eration with

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

SLLS349B – JUNE 1999 – REVISED JANUARY 2000

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

0°C to 70°C MAX3238CDB MAX3238CDW MAX3238CPW

–40°C to 85°C MAX3238IDB MAX3238IDW MAX3238IPW

The DB, DW, and PW packages are available taped and reeled. Add the suf fix R to device
type (e.g., MAX3238CDBR).

DIN FORCEON

X X L X Z Powered off
L H H X H
H HH X L
L L H <30 s H
H L H <30 s L
L L H >30 s Z
H L H >30 s Z

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

FORCEOFF

SHRINK

SMALL OUTLINE

(DB)

Function Tables

EACH DRIVER

INPUTS

TIME ELAPSED SINCE LAST

RIN OR DIN TRANSITION

SMALL OUTLINE

(DW)

SMALL OUTLINE

DOUT

THIN SHRINK

(PW)

DRIVER STATUS

Normal operation with

auto-powerdown plus disabled

Normal operation with

auto-powerdown plus enabled

Powered off by

auto-powerdown plus feature

RIN2

L X L X L Z

H XL X H Z

L L H <30 s L H

PRODUCT PREVIEW

L H H <30 s L L
H L H <30 s H H
H H H <30 s H L

Open Open H >30 s L H

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

RIN1,

RIN3–RIN5

FORCEOFF

EACH RECEIVER

INPUTS

TIME ELAPSED SINCE LAST RIN

OR DIN TRANSITION

OUTPUTS

ROUT1B ROUT

RECEIVER STATUS

Powered off while
ROUT1B is active

Normal operation with

auto-powerdown plus

disabled/enabled

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic diagram (positive logic)

MAX3238

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

SLLS349B – JUNE 1999 – REVISED JANUARY 2000

DIN1

DIN2

DIN3

DIN4

DIN5

FORCEOFF

FORCEON

ROUT1B

24

23

22

19 10

17

14

13

16

Auto-powerdown

Plus

12

15

5

6

7

DOUT1

DOUT2

DOUT3

DOUT4

DOUT5

INVALID

ROUT1

ROUT2

ROUT3

21

20

18

8

RIN1

9

RIN2

11

RIN3

PRODUCT PREVIEW

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

MAX3238

Suppl

oltage

V

VIHDriver and control high-level input voltage

DIN, FORCEOFF, FORCEON

V

TAO erating free-air tem erature

°C

ICCSu ly current

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

SLLS349B – 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) –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 62°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DW package 46°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PW package 62°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

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

IL

V

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

I

V

Receiver input voltage –25 25 V

I

p

PRODUCT PREVIEW

NOTE 3: Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF

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

p

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

MAX3238C 0 70
MAX3238I –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 ±0.01 ±1 µA

I

pp

‡

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

NOTE 3: Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF

4

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

Auto-powerdown plus
disabled

Powered off No load, FORCEOFF at GND 1 10
Auto-powerdown plus

enabled

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

No load,
FORCEOFF

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

and FORCEON at V

CC

0.5 2 mA

1 10

µA