MAXIM MAX1489E Technical data

_______________General Description

The MAX1489E quad, low-power line receiver is
designed for EIA/TIA-232, EIA/TIA-562, and CCITT V.28
communications in harsh environments. Each receiver
input is protected against ±15kV electrostatic dis­charge (ESD) shocks. These inputs have a ±25V range
and feature hysteresis and time-domain filtering. The
outputs are TTL and CMOS compatible. The MAX1489E
has a 120kbps guaranteed data rate. Supply current is
typically 350µA.

The MAX1489E is pin compatible with the MC1489,
MC14C89, SN75189, SN75C189, DS1489, and
DS14C89. It is available in 14-pin plastic DIP and SO
packages.

________________________Applications

PC Motherboards

Modems

Interfacing Data Terminal Equipment (DTE) with

Data Circuit-Terminating Equipment (DCE)

Equipment Meeting IEC1000-4-2 (formerly

IEC801-2) or ±15kV ESD Protection

____________________________Features

♦ Enhanced ESD Protection:

±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap Discharge

♦ Latchup Free During an ESD Event

♦ Low 350µA Supply Current

♦ Input Hysteresis and Time-Domain Filtering

Eliminate the Need for External Filtering

♦ Stable Input Thresholds

♦ Pin Compatible with MC1489, MC14C89, SN75189,

SN75C189, DS1489, and DS14C89

MAX1489E

±15kV ESD-Protected, Quad,

Low-Power RS-232 Line Receiver

________________________________________________________________ Maxim Integrated Products 1

__________________Pin Configuration

INTERCONNECTING

CABLE

SIGNAL GROUND

TTL/CMOS

LOGIC

PC

MOTHERBOARD

(DTE)

MODEM

(DCE)

TTL/CMOS

LOGIC

1

⁄4 MAX1488E

1

⁄4 MAX1489E

1

⁄4 MAX1489E

1

⁄4 MAX1488E

__________Typical Operating Circuit

19-0426; Rev 1; 2/03

PART

MAX1489ECPD

MAX1489ECSD

MAX1489EC/D 0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP RANGE PIN-PACKAGE

14 Plastic DIP

14 SO

Dice*

______________Ordering Information

* Dice are specified at TA= +25°C.

MAX1489EEPD -40°C to +85°C 14 Plastic DIP
MAX1489EESD -40°C to +85°C 14 SO

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

TOP VIEW

INPUT A

N.C.

OUTPUT A

INPUT B

N.C.

OUTPUT B

GND

1

MAX1489E

2

3

4

5

6

7

DIP/SO

14

13

12

11

10

9

8

V

CC

INPUT D

N.C.

OUTPUT D

INPUT C

N.C.

OUTPUT C

MAX1489E

±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= 5V ±10%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= 5V, TA= +25°C.)

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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: Only one output may be shorted at a time.
Note 2: See Noise Pulse Rejection graph in Typical Operating Characteristics section.

Supply Voltage (V

CC

).............................................................+7V

Input Voltage (V

IN

)...............................................................±30V

Output Short-Circuit Current
(Shorted to GND or V

CC

) (Note 1) ............................Self Limiting

Continuous Power Dissipation (T

A

= +70°C)

Plastic DIP (derate 10.00mW/°C above +70°C) ..........800mW

SO (derate 8.7mW/°C above +70°C)...........................695mW

Operating Temperature Ranges

MAX1489EC_D ...................................................0°C to +70°C

MAX1489EE_D ................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10s) .................................+300°C

Pulse amplitude = 5V (Note 2)

V

OUT

= 10% to 90%

Figure 1

Figure 1

Figure 1

VIN≥ 2.4V, I

OUT

= 3.2mA

Shorted to GND

Shorted to V

CC

CONDITIONS

µs1.0t

N

Input Noise Rejection

ns35 120t

TR

Output Transition Time

ns70t

SKEW

Output Propagation Delay Skew,

I

t

PLH

- t

PHL

I

µs1.45 4.0t

PHL

Output Propagation Delay,
High to Low

µs1.38 4.0t

PLH

Output Propagation Delay,
Low to High

kΩ3.0 5.0 7.0R

IN

Input Resistance

V1.11V

HYST

Input Hysteresis

V0.75 1.06 1.30V

IL

Input Voltage Low

V1.60 2.17 2.60V

IH

Input Voltage High

V-25 25V

IN

Input Voltage Range

V0.17 0.4V

OL

Output Voltage Low

-35
mA

60

I

OS

Output Short-Circuit Current
(Note 1)

µA260 600I

CC

Supply Current

UNITSMIN TYP MAXSYMBOLPARAMETER

kbps120 240DRGuaranteed Data Rate

Human Body Model

kV

±15

IEC1000-4-2 (Contact Discharge) ±8

IEC1000-4-2 (Air-Gap Discharge) ±15

ESD Protection

VIN≤ 0.4V

I

OUT

= -20µA

I

OUT

= -3.2mA

V

2.5 4.41

V

OH

Output Voltage High

3.5 4.99

DC CHARACTERISTICS

TIMING CHARACTERISTICS

ESD CHARACTERISTICS

MAX1489E

±15kV ESD-Protected, Quad,

Low-Power RS-232 Line Receiver

_______________________________________________________________________________________ 3

NAME FUNCTION

1, 4, 10,

13

INPUT_ Receiver Inputs

2, 5, 9,

12

N.C.

No Connect—not internally
connected

PIN

3, 6, 8,

11

OUTPUT_ Receiver Outputs

7 GND Ground

_____________________Pin Description

14 V

CC

Supply Voltage

__________________________________________Typical Operating Characteristics

(VCC= 5V, TA = +25°C, unless otherwise noted.)

Figure 1. Timing Diagram

PROPAGATION DELAY vs. TEMPERATURE

2.2

MAX1489E-01

1.8

1.4

1.0

PROPAGATION DELAY (µs)

0.6

-40

t

PHL

t

PLH

-15 35 85

10

TEMPERATURE (°C)

60

PROPAGATION DELAY SKEW (ns)

PROPAGATION DELAY SKEW

vs. TEMPERATURE

800

600

400

VCC = 5.25V

200

0

-40

-15 35 85
TEMPERATURE (°C)

10

VCC = 5V

VCC = 4.75V

S.G.

0V

V

OUT

60

3.0V

MAX1489E-02

INPUT PULSE AMPLITUDE (Vp-p)

1.5V

t

PHL

50% 50%

t

TR

NOISE PULSE REJECTION

8

6

4

2

0

0.7

10%

VIN = (VIL + VIH) ± PULSE AMP,
2 2
f = 300kHz

1.1 1.9 2.7

1.5

INPUT PULSE WIDTH (µs)

t

PLH

90%

t

TR

V

CC

2.3

V

OH

V

OL

MAX1489E-03

SIGNAL

GENERATOR

(S.G.)

NOTE: S.G. SET TO f = 20kHz;
DUTY CYCLE = 50%;

, tF < 5.0ns

t

R

50pF V

OUT

MAX1489E

_______________Detailed Description

±15kV ESD Protection

As with all Maxim devices, ESD protection structures
are incorporated on all pins to protect against electro­static discharges encountered during handling and
assembly. The MAX1489E receiver inputs have extra
protection against static electricity found in normal
operation. Maxim’s engineers developed state-of-the­art structures to protect these pins against ESD of
±15kV without damage. After an ESD event, the
MAX1489E keeps working without latchup.

ESD protection can be tested in various ways; the
receiver inputs are characterized for protection to the
following:

1) ±15kV using the Human Body Model

2) ±8kV using the Contact Discharge method speci­fied in IEC1000-4-2 (formerly IEC801-2)

3) ±15kV using the Air-Gap Discharge method speci­fied in IEC1000-4-2 (formerly IEC801-2).

ESD Test Conditions

Contact Maxim for a reliability report that documents
test setup, methodology, and results.

Human Body Model

Figure 2a shows the Human Body Model, and Figure
2b shows the current waveform it generates when dis­charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter­est, which is then discharged into the test device
through a 1.5kΩ resistor.

IEC1000-4-2

The IEC100-4-2 standard covers ESD testing and per­formance of finished equipment; it does not specifically
refer to integrated circuits. The MAX1489E helps you
design equipment that meets Level 4 (the highest level)
of IEC1000-4-2, without additional ESD protection com­ponents.

The major difference between tests done using the
Human Body Model and IEC1000-4-2 is higher peak cur­rent in IEC1000-4-2. Because series resistance is lower
in the IEC1000-4-2 ESD test model (Figure 3a), the ESD
withstand voltage measured to this standard is generally
lower than that measured using the Human Body Model.
Figure 3b shows the current waveform for the ±8kV
IEC1000-4-2 Level 4 ESD Contact Discharge test.

The Air-Gap test involves approaching the device with a
charged probe. The Contact Discharge method connects
the probe to the device before the probe is energized.

±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver

4 _______________________________________________________________________________________

Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Model Current Waveform

1MΩ RD 1500Ω

R

C

HIGH-

VOLTAGE

DC

SOURCE

CHARGE-CURRENT

LIMIT RESISTOR

100pF

C

s

DISCHARGE

RESISTANCE

STORAGE
CAPACITOR

DEVICE

UNDER

TEST

AMPERES

IP 100%

90%

36.8%

10%

I

r

0

0

t

RL

TIME

t

DL

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)

Machine Model

The Machine Model for ESD testing uses a 200pF stor­age capacitor and zero-discharge resistance. Its objec­tive is to mimic the stress caused by contact that
occurs with handling and assembly during manufactur­ing. Of course, all pins (not just RS-232 inputs and out­puts) require this protection during manufacturing.
Therefore, the Machine Model is less relevant to the I/O
ports than the Human Body Model and IEC1000-4-2.

__________ Applications Information

Use proper layout to ensure other devices on your
board are not damaged in an ESD strike. Currents as
high as 60A can instantaneously pass through the
ground pin, so it is important to minimize the ground­lead return path to the power supply. A separate return
path to the power supply is recommended. Trace
widths should be greater than 40 mils. V

CC

must be
bypassed with 0.1µF capacitors as close to the part as
possible to ensure maximum ESD protection.

MAX1489E

±15kV ESD-Protected, Quad,

Low-Power RS-232 Line Receiver

_______________________________________________________________________________________ 5

Figure 3a. IEC1000-4-2 ESD Test Model Figure 3b. IEC1000-4-2 ESD Generator Current Waveform

PEAK

I

100%

90%

10%

I

30ns

60ns

50MΩ to 100MΩ RD 330Ω

R

C

C

s

DISCHARGE

RESISTANCE

STORAGE
CAPACITOR

DEVICE

UNDER

TEST

tr = 0.7ns to 1ns

CHARGE-CURRENT

LIMIT RESISTOR

HIGH-

VOLTAGE

DC

SOURCE

150pF

t

MAX1489E

±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver

6 _______________________________________________________________________________________

___________________Chip Topography

TRANSISTOR COUNT: 144

SUBSTRATE CONNECTED TO GND

INPUT D

OUTPUT B

0.096"

(2.438mm)

0.071"

(1.803mm)

GND

OUTPUT D

INPUT C

OUTPUT C

V

CC

INPUT B

OUTPUT A

INPUT A

MAX1489E

±15kV ESD-Protected, Quad,

Low-Power RS-232 Line Receiver

_______________________________________________________________________________________ 7

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

A2

A

L

A1

D1

INCHES MILLIMETERS

MIN

A

0.015

0.125

0.055

B

0.016

0.045

C

0.008

0.005

E

0.300

0.240

e

0.100

0.300

L

0.115

PINS

8
14
16
18
20
24

MAX

0.200

–

–

0.175

0.080

0.022

0.065

0.012

0.080

0.325

0.310
–
–

0.400

–

0.150

INCHES MILLIMETERS

MIN

MAX

0.348

0.390

0.735

0.765

0.745

0.765

0.885

0.915

1.015

1.045

1.14

1.265

MIN

–

0.38

3.18

1.40

0.41

1.14

0.20

0.13

7.62

6.10

2.54

7.62
–

2.92

8.84

18.67

18.92

22.48

25.78

28.96

MIN

MAX

5.08
–

4.45

2.03

0.56

1.65

0.30

2.03

8.26

7.87
–
–

10.16

3.81

MAX

9.91

19.43

19.43

23.24

26.54

32.13

21-0043A

PKG.

P
P
P
P
P
N

DIM

A1
A2
A3

B1

D1

E1

eA
eB

DIM

D
D
D
D
D
D

E

D

A3

e

B

B1

E1

0° - 15°

C

eA

eB

Plastic DIP

PLASTIC

DUAL-IN-LINE

PACKAGE

(0.300 in.)

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 [phone]

© 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

MAX1489E

±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

A1

DIM

A1

A

0.101mm

0.004in.

C

L

0°-8°

INCHES MILLIMETERS

MIN

A

0.053

0.004

B

0.014

C

0.007

E

0.150
e
H

0.228
L

0.016

MAX

0.069

0.010

0.019

0.010

0.157

0.244

0.050

MIN

1.35

0.10

0.35

0.19

3.80

1.270.050

5.80

0.40

D

e

B

MAX

1.75

0.25

0.49

0.25

4.00

6.20

1.27

PINS

Narrow SO

HE

SMALL-OUTLINE

PACKAGE

(0.150 in.)

DIM

D
D
D

INCHES MILLIMETERS

MIN

MAX

8

0.189

0.197

14

0.337

0.344

16

0.386

0.394

MIN

4.80

8.55

9.80

MAX

5.00

8.75

10.00

21-0041A