_______________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 dis-
charge (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
14
13
12
11
10
9
8
1
2
3
4
5
6
7
VCC
INPUT D
N.C.
OUTPUT D
INPUT C
N.C.
OUTPUT C
INPUT A
N.C.
OUTPUT A
INPUT B
N.C.
OUTPUT B
GND
TOP VIEW
MAX1489E
DIP/SO
__________________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.
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = 5V ±10%, TA= TMIN to TMAX, 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 (VCC).............................................................+7V
Input Voltage (VIN)...............................................................±30V
Output Short-Circuit Current
(Shorted to GND or VCC) (Note 1) ............................Self Limiting
Continuous Power Dissipation (TA= +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)
VOUT = 10% to 90%
Figure 1
Figure 1
Figure 1
VIN ≥2.4V, IOUT = 3.2mA
Shorted to GND
Shorted to VCC
CONDITIONS
µs1.0tN
Input Noise Rejection
ns35 120tTR
Output Transition Time
ns70tSKEW
Output Propagation Delay Skew,
I
tPLH - tPHL
I
µs1.45 4.0tPHL
Output Propagation Delay,
High to Low
µs1.38 4.0tPLH
Output Propagation Delay,
Low to High
kΩ3.0 5.0 7.0RIN
Input Resistance
V1.11VHYST
Input Hysteresis
V0.75 1.06 1.30VIL
Input Voltage Low
V1.60 2.17 2.60VIH
Input Voltage High
V-25 25VIN
Input Voltage Range
V0.17 0.4VOL
Output Voltage Low
-35 mA
60
IOS
Output Short-Circuit Current
(Note 1)
µA260 600ICC
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 IOUT = -20µA
IOUT = -3.2mA V
2.5 4.41
VOH
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
0.6
-40
PROPAGATION DELAY vs. TEMPERATURE
1.0
MAX1489E-01
TEMPERATURE (°C)
PROPAGATION DELAY (µs)
60
1.8
1.4
-15 35 85
2.2
10
tPHL
tPLH
0
-40
PROPAGATION DELAY SKEW
vs. TEMPERATURE
200
MAX1489E-02
TEMPERATURE (°C)
PROPAGATION DELAY SKEW (ns)
60
600
400
-15 35 85
800
10
VCC = 5V
VCC = 5.25V
VCC = 4.75V
0
0.7
NOISE PULSE REJECTION
2
MAX1489E-03
INPUT PULSE WIDTH (µs)
INPUT PULSE AMPLITUDE (Vp-p)
2.3
6
4
1.1 1.9 2.7
8
1.5
VIN = (VIL + VIH) ± PULSE AMP,
2 2
f = 300kHz
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
7GND Ground
_____________________Pin Description
14 VCC Supply Voltage
__________________________________________Typical Operating Characteristics
(VCC = 5V, TA = +25°C, unless otherwise noted.)
tPHL tPLH
tTR
tTR
1.5V
3.0V
0V
S.G.
VOUT
VOH
VOL
10%
50% 50%
50pF VOUT
VCC
SIGNAL
GENERATOR
(S.G.)
90%
NOTE: S.G. SET TO f = 20kHz;
DUTY CYCLE = 50%;
tR, tF < 5.0ns
Figure 1. Timing Diagram
MAX1489E
_______________Detailed Description
±15kV ESD Protection
As with all Maxim devices, ESD protection structures
are incorporated on all pins to protect against electro-
static 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-the-
art 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 speci-
fied in IEC1000-4-2 (formerly IEC801-2)
3) ±15kV using the Air-Gap Discharge method speci-
fied 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 dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the test device
through a 1.5kΩresistor.
IEC1000-4-2
The IEC100-4-2 standard covers ESD testing and per-
formance 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 com-
ponents.
The major difference between tests done using the
Human Body Model and IEC1000-4-2 is higher peak cur-
rent 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 _______________________________________________________________________________________
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC 1MΩRD 1500Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
IP 100%
90%
36.8%
tRL TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Model Current Waveform
Machine Model
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. Its objec-
tive is to mimic the stress caused by contact that
occurs with handling and assembly during manufactur-
ing. Of course, all pins (not just RS-232 inputs and out-
puts) 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 ground-
lead return path to the power supply. A separate return
path to the power supply is recommended. Trace
widths should be greater than 40 mils. VCC 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
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
RC 50MΩ to 100MΩRD 330Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
tr = 0.7ns to 1ns 30ns
60ns
t
100%
90%
10%
I
PEAK
I
Figure 3a. IEC1000-4-2 ESD Test Model Figure 3b. IEC1000-4-2 ESD Generator Current Waveform
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
VCC
INPUT B
OUTPUT A
INPUT A
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver
_______________________________________________________________________________________ 7
DIM
A
A1
A2
A3
B
B1
C
D1
E
E1
e
eA
eB
L
MIN
–
0.015
0.125
0.055
0.016
0.045
0.008
0.005
0.300
0.240
0.100
0.300
–
0.115
MAX
0.200
–
0.175
0.080
0.022
0.065
0.012
0.080
0.325
0.310
–
–
0.400
0.150
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
MAX
5.08
–
4.45
2.03
0.56
1.65
0.30
2.03
8.26
7.87
–
–
10.16
3.81
INCHES MILLIMETERS
Plastic DIP
PLASTIC
DUAL-IN-LINE
PACKAGE
(0.300 in.)
DIM
D
D
D
D
D
D
PKG.
P
P
P
P
P
N
MIN
0.348
0.735
0.745
0.885
1.015
1.14
MAX
0.390
0.765
0.765
0.915
1.045
1.265
MIN
8.84
18.67
18.92
22.48
25.78
28.96
MAX
9.91
19.43
19.43
23.24
26.54
32.13
INCHES MILLIMETERS
PINS
8
14
16
18
20
24
C
AA2
E1
D
E
eA
eB
A3
B1
B
0° - 15°
A1
L
D1
e
21-0043A
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.)
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 (408) 737-7600
© 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
DIM
A
A1
B
C
E
e
H
L
MIN
0.053
0.004
0.014
0.007
0.150
0.228
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
5.80
0.40
MAX
1.75
0.25
0.49
0.25
4.00
6.20
1.27
INCHES MILLIMETERS
21-0041A
Narrow SO
SMALL-OUTLINE
PACKAGE
(0.150 in.)
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
INCHES MILLIMETERS
PINS
8
14
16
1.270.050
L
0°-8°
HE
D
e
A
A1 C
0.101mm
0.004in.
B
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.)
