MAX1489EEPD ,15kV ESD-Protected / Quad / Low-Power RS-232 Line ReceiverGeneral Description ________
MAX1489EEPD ,15kV ESD-Protected / Quad / Low-Power RS-232 Line ReceiverFeaturesThe MAX1489E quad, low-power line receiver is' Enhanced ESD Protection:designed for EIA/TIA ..
MAX1489EEPD ,15kV ESD-Protected / Quad / Low-Power RS-232 Line ReceiverFeaturesThe MAX1489E quad, low-power line receiver is' Enhanced ESD Protection:designed for EIA/TIA ..
MAX1489EEPD ,15kV ESD-Protected / Quad / Low-Power RS-232 Line ReceiverMAX1489E19-0426; Rev 0; 8/95±15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver_______________
MAX1489EEPD ,15kV ESD-Protected / Quad / Low-Power RS-232 Line ReceiverApplicationsPC Motherboards______________Ordering InformationModemsInterfacing Data Terminal Equipm ..
MAX1489EEPD+ ,±15kV ESD-Protected, Quad, Low-Power RS-232 Line ReceiverMAX1489E19-0426; Rev 1; 2/03±15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver_______________
MAX4107ESA+T ,350MHz, Ultra-Low-Noise Op AmpsApplications ______________Ordering InformationUltra-Low-Noise ADC PreampPART TEMP. RANGE PIN-PACKA ..
MAX4108ESA ,400MHz / Ultra-Low-Distortion Op AmpsApplications' Low Differential Gain/Phase: 0.004%/0.008°High-Speed ADC/DAC PreampRGB and Composite ..
MAX4108ESA ,400MHz / Ultra-Low-Distortion Op AmpsMAX4108/MAX4109/MAX4308/MAX430919-0461; Rev 2; 4/97400MHz, Ultra-Low-Distortion Op Amps____________ ..
MAX4108ESA+T ,400MHz, Ultra-Low-Distortion Op AmpsApplications♦ Low Differential Gain/Phase: 0.004%/0.008°High-Speed ADC/DAC PreampRGB and Composite ..
MAX4109ESA ,400MHz / Ultra-Low-Distortion Op AmpsFeaturesThe MAX4108/MAX4109/MAX4308/MAX4309 op amps' High Speed:combine ultra-high-speed performanc ..
MAX410BCSA ,Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op AmpsELECTRICAL CHARACTERISTICS
(V+ = 5V, V- = -5V, TA = +25°C, unless otherwise noted.)
PARAMETER ..
MAX1489ECPD-MAX1489ECSD-MAX1489EEPD-MAX1489EESD
15kV ESD-Protected / Quad / Low-Power RS-232 Line Receiver
_______________General DescriptionThe 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.
________________________ApplicationsPC 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
____________________________FeaturesEnhanced ESD Protection:
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap DischargeLatchup Free During an ESD EventLow 350µA Supply CurrentInput Hysteresis and Time-Domain Filtering
Eliminate the Need for External FilteringStable Input ThresholdsPin Compatible with MC1489, MC14C89, SN75189,
SN75C189, DS1489, and DS14C89
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.19-0426; Rev 0; 8/95
* Dice are specified at TA= +25°C.
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= 5V ±10%, TA= TMINto 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 Characteristicssection.
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, 10sec).............................+300°C
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver
_______________________________________________________________________________________3PROPAGATION DELAY vs. TEMPERATURE
MAX1489E-01
TEMPERATURE (°C)
PROPAGATION DELAY (
PROPAGATION DELAY SKEW
vs. TEMPERATURE
MAX1489E-02
TEMPERATURE (°C)
PROPAGATION DELAY SKEW (ns)
NOISE PULSE REJECTION
MAX1489E-03
INPUT PULSE WIDTH (μs)
INPUT PULSE AMPLITUDE (Vp-p)
_____________________Pin Description
__________________________________________Typical Operating Characteristics
(VCC= 5V, TA = +25°C, unless otherwise noted.)
Figure 1. Timing Diagram
MAX1489E
_______________Detailed Description
±15kV ESD ProtectionAs 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:±15kV using the Human Body Model±8kV using the Contact Discharge method speci-
fied in IEC1000-4-2 (formerly IEC801-2)±15kV using the Air-Gap Discharge method speci-
fied in IEC1000-4-2 (formerly IEC801-2).
ESD Test ConditionsContact Maxim for a reliability report that documents
test setup, methodology, and results.
Human Body ModelFigure 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.
IEC1000-4-2The 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_______________________________________________________________________________________Figure 2a.Human Body ESDTest ModelFigure 2b.Human Body Model Current Waveform
Machine ModelThe 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 InformationUse 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. VCCmust 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
_______________________________________________________________________________________5Figure 3a.IEC1000-4-2 ESDTest ModelFigure 3b.IEC1000-4-2 ESDGenerator Current Waveform
MAX1489E
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver_______________________________________________________________________________________
___________________Chip TopographyTRANSISTOR COUNT: 144
SUBSTRATE CONNECTED TO GND
