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MAX3040CSE+MAXIMN/a1500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3040CUE+ |MAX3040CUEMAXN/a35avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3040ESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041CSE+ |MAX3041CSEMAXIMN/a7avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041CUE+ |MAX3041CUEMAXN/a17avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041ESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041EUE+ |MAX3041EUEMAXN/a35avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041EUE+ |MAX3041EUEMAXIMN/a1avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041EWE+MAXIMN/a500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3041EWE+ |MAX3041EWEMAXN/a160avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BCSE+ |MAX3042BCSEMAXIMN/a20avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BCSE+T |MAX3042BCSETMAXN/a1avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BCUE+ |MAX3042BCUEMAXN/a90avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BCWE+ |MAX3042BCWEMAXIMN/a10avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BCWE+ |MAX3042BCWEMAXN/a414avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BESE+TMAXIMN/a3000avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3042BEUE+ |MAX3042BEUEMAXN/a25avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3043ESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3044ESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3044EUE+ |MAX3044EUEMAXN/a23avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BCSE+ |MAX3045BCSEMAXIMN/a80avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BCUE+ |MAX3045BCUEMAXN/a25avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BESE+MAXIMN/a2500avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BESE+TMAXIMN/a1944avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BEUE+ |MAX3045BEUEMAXIMN/a20avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
MAX3045BEUE+ |MAX3045BEUEMAXN/a80avai±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters


MAX3042BESE+T ,±10kV ESD-Protected, Quad 5V RS-485/RS-422 TransmittersMAX3040–MAX304519-2143; Rev 1; 12/01±10kV ESD-Protected, Quad 5V RS-485/RS-422Transmitters
MAX3042BEUE+ ,±10kV ESD-Protected, Quad 5V RS-485/RS-422 TransmittersMAX3040–MAX304519-2143; Rev 1; 12/01±10kV ESD-Protected, Quad 5V RS-485/RS-422Transmitters
MAX3043CSE ,10kV ESD-Protected / Quad 5V RS-485/RS-422 TransmittersApplicationstransmitters that minimize EMI and reduce reflections Up to 20Mbps Data Rate (MAX3042B ..
MAX3043ESE ,10kV ESD-Protected / Quad 5V RS-485/RS-422 TransmittersApplicationsMAX3040EWE -40°C to +85°C 16 Wide SO 250kbpsHand-Held EquipmentOrdering Information con ..
MAX3043ESE+ ,±10kV ESD-Protected, Quad 5V RS-485/RS-422 TransmittersApplicationsMAX3040CSE 0°C to +70°C 16 Narrow SO 250kbpsTelecommunications EquipmentMAX3040CWE 0°C ..
MAX3043EUE ,10kV ESD-Protected / Quad 5V RS-485/RS-422 TransmittersMAX3040–MAX304519-2143; Rev 1; 12/01±10kV ESD-Protected, Quad 5V RS-485/RS-422Transmitters
MAX6241BESA+ ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesApplicationsPART TEMP RANGE TEMPCOPACKAGE● High-Resolution Analog-to-Digital and Digital-to- (ppm/° ..
MAX6250ACPA ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesMAX6225/MAX6241/MAX625019-1139; Rev 3; 5/98Low-Noise, Precision, +2.5V/+4.096V/+5VVoltage References
MAX6250ACSA ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesMAX6225/MAX6241/MAX625019-1139; Rev 3; 5/98Low-Noise, Precision, +2.5V/+4.096V/+5VVoltage References
MAX6250-AEPA ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesGeneral Description ________
MAX6250AESA ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesApplications Ordering InformationHigh-Resolution Analog-to-Digital MAXPIN-and Digital-to-Analog Con ..
MAX6250AESA+ ,Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage ReferencesFeatures● Low 1.0ppm/°C Temperature CoefficientThe MAX6225/MAX6241/MAX6250 are low-noise, pre-● Ver ..


MAX3040CSE+-MAX3040CUE+-MAX3040ESE+-MAX3041CSE+-MAX3041CUE+-MAX3041ESE+-MAX3041EUE+-MAX3041EWE+-MAX3042BCSE+-MAX3042BCSE+T-MAX3042BCUE+-MAX3042BCWE+-MAX3042BESE+-MAX3042BESE+T-MAX3042BEUE+-MAX3043ESE+-MAX3044ESE+-MAX3044EUE+-MAX3045BCSE+-MAX3045BCUE+-MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422 Transmitters
General Description
The MAX3040–MAX3045 is a family of 5V quad RS-
485/RS-422 transmitters designed for digital data trans-
mission over twisted-pair balanced lines. All transmitter
outputs are protected to ±10kV using the Human Body
Model. In addition the MAX3040–MAX3045 withstand
±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst
Stressing. The MAX3040/MAX3043 (250kbps) and the
MAX3041/MAX3044 (2.5Mbps) are slew-rate limited
transmitters that minimize EMI and reduce reflections
caused by improperly terminated cables, thus allowing
error-free transmission.
The MAX3040–MAX3045 feature a hot-swap capability*
that eliminates false transitions on the data cable during
power-up or hot insertion. The MAX3042B/MAX3045B
are optimized for data transfer rates up to 20Mbps, the
MAX3041/MAX3044 for data rates up to 2.5Mbps, and
the MAX3040/MAX3043 for data rates up to 250kbps.
The MAX3040–MAX3045 offer optimum performance
when used with the MAX3093E or MAX3095 5V quad
differential line receivers or MAX3094E/MAX3096 3V
quad differential line receivers.
The MAX3040–MAX3045 are ESD-protected pin-compat-
ible, low-power upgrades to the industry-standard
‘SN75174 and ‘DS26LS31C. They are available in space-
saving TSSOP, narrow SO, and wide SO packages.
*Patent pending
Applications

Telecommunications Equipment
Industrial Motor Control
Transmitter for ESD-Sensitive Applications
Hand-Held Equipment
Industrial PLCs
Networking
Features
ESD Protection: ±10kV—Human Body ModelSingle +5V OperationGuaranteed Device-to-Device Skew
(MAX3040/MAX3041/MAX3043/MAX3044)
Pin-Compatible with ‘SN75174, ‘26LS31C and
LTC487
Hot-Swappable for Telecom ApplicationsUp to 20Mbps Data Rate (MAX3042B/MAX3045B)Slew-Rate Limited (Data Rates at 2.5Mbps and
250kbps)
2nA Low-Power Shutdown Mode1mA Operating Supply Current±4kV EFT Fast Transient Burst Immunity per IEC
1000-4-4
Level 2 Surge Immunity per IEC 1000-4-5,
Unshielded Cable Model
Ultra-Small 16-Pin TSSOP, 16-Pin Narrow SO, and
Wide 16-Pin SO
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
Pin ConfigurationsSelector Guide
Ordering Information

19-2143; Rev 1; 12/01
Ordering Information continued at end of data sheet.
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

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.
All voltages referenced to ground (GND).
Supply Voltage (VCC).............................................................+7V
Control Input Voltage (EN, EN, EN_) .........-0.3V to (VCC+ 0.3V)
Driver Input Voltage (T_IN).........................-0.3V to (VCC+ 0.3V)
Driver Output Voltage (Y_, Z_)
(Driver Disabled).............................................-7.5V to +12.5V
Driver Output Voltage (Y_, Z_)
(Driver Enabled).................................................-7.5V to +10V
Continuous Power Dissipation (TA= +70°C)
16-Pin TSSOP (derate 9.4mW/°C above +70°C)..........755mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C)..696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C).....762mW
Operating Temperature Range
MAX304_C_E.......................................................0°C to +70°C
MAX304_E_E....................................................-40°C to +85°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
SWITCHING CHARACTERISTICS—MAX3040/MAX3043
SWITCHING CHARACTERISTICS—MAX3041/MAX3044
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters

ground unless otherwise noted.
Note 2:
∆VODand ∆VOCare the changes in VODand VOC, respectively, when the transmitter input changes state.
Note 3:
This input current level is for the hot-swap enable (EN_, EN, EN) inputs and is present until the first transition only. After the
first transition the input reverts to a standard high-impedance CMOS input with input current IIN. For the first 20µs the input
current may be as high as 1mA. During this period the input is disabled.
Note 4:
Maximum current level applies to peak current just prior to foldback-current limiting. Minimum current level applies during
SWITCHING CHARACTERISTICS—MAX3041/MAX3044 (continued)
SWITCHING CHARACTERISTICS—MAX3042B/MAX3045B

(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
Typical Operating Characteristics

(VCC= +5V, TA = +25°C, unless otherwise noted.)
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
Detailed Description

The MAX3040–MAX3045 are quad RS-485/RS-422 trans-
mitters. They operate from a single +5V power supply
and are designed to give optimum performance when
used with the MAX3093E/MAX3095 5V quad RS-485/
RS-422 receivers or MAX3094E/MAX3096 3V quad
RS-485/RS-422 receivers. The MAX3040–MAX3045 only
need 1mA of operating supply current and consume 2nA
when they enter a low-power shutdown mode. The
MAX3040–MAX3045 also feature a hot-swap capability
allowing line insertion without erroneous data transfer.
The MAX3042B/MAX3045B are capable of transferring
data up to 20Mbps, the MAX3041/MAX3044 for data
rates up to 2.5Mbps, and the MAX3040/MAX3043 for
data rates up to 250kbps. All transmitter outputs are pro-
tected to ±10kV using the Human Body Model.
±10kV ESD Protection

As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges (ESD) encountered during handling
and assembly. The MAX3040–MAX3045 transmitter
outputs have extra protection against electrostatic dis-
charges found in normal operation. Maxim’s engineers
have developed state-of-the-art structures to protect
these pins against the application of ±10kV ESD
(Human Body Model), without damage.
ESD Test Conditions

ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
Human Body Model

Figure 6a shows the Human Body Model, and Figure
6b shows the current waveform it generates when dis-
charged into low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the device through a
1.5kΩresistor.
Machine Model
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing
and assembly. Of course, all pins (not just RS-485
inputs) require this protection during manufacturing.
Therefore, the Machine Model is less relevant to the I/O
ports than are the Human Body Model.
±4kV Electrical Fast Transient/Burst Testing
(IEC 1000-4-4)

IEC 1000-4-4 Electrical Fast Transient/Burst (EFT/B) is
an immunity test for the evaluation of electrical and
electronic systems during operating conditions. The
test was adapted for evaluation of integrated circuits
with power applied. Repetitive fast transients with
severe pulsed EMI were applied to signal and control
ports. Over 15,000 distinct discharges per minute are
sent to each interface port of the IC or equipment under
test (EUT) simultaneously with a minimum test duration
time of one minute. This simulates stress due to dis-
placement current from electrical transients on AC
mains, or other telecommunication lines in close prox-
imity. Short rise times and very specific repetition rates
are essential to the validity of the test.
Stress placed on the EUT is severe. In addition to the
controlled individual discharges placed on the EUT,
extraneous noise and ringing on the transmission line
can multiply the number of discharges as well as
increase the magnitude of each discharge. All cabling
was left unterminated to simulate worst-casereflections.
The MAX3040–MAX3045 were setup as specified in
IEC 1000-4-4 and the Typical Operating Circuitof this
data sheet. The amplitude, pulse rise time, pulse dura-
tion, pulse repetition period, burst duration, and burst
period (Figure 8)of the burst generator were all verified
with a digital oscilloscope according to the specifica-
tions in IEC 1000-4-4 sections 6.1.1 and 6.1.2. A simpli-
fied diagram of the EFT/B generator is shown in Figure
7. The burst stresses were applied to Y1–Y4 and Z1–Z4
simultaneously.
IEC 1000-4-4 provides several levels of test severity
(see Table 1). The MAX3040–MAX3045 pass the 4000V
stress, a special category “X” beyond the highest level
for severe (transient) industrial environments for
telecommunication lines.
MAX3040–MAX3045
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
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