MAX3284EAUT+T Maxim Integrated Products, MAX3284EAUT+T Datasheet - Page 5

• Manufacturer Part Number: MAX3284EAUT+T
• Description: IC RS485/422 RECEIVER SOT23-6
• Manufacturer: Maxim Integrated Products
• Type: Receiverr

Specifications of MAX3284EAUT+T

• Number Of Drivers/receivers: 0/1
• Protocol: RS422, RS485
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX3280E/MAX3281E/MAX3283E/MAX3284E are
single, true fail-safe receivers designed to operate at
data rates up to 52Mbps. The fail-safe architecture guar-
antees a high output signal if both input terminals are
open or shorted together. See the True Fail-Safe section.
This feature assures a stable and predictable output
logic state with any transmitter driving the line. These
receivers function with a 3.3V or 5V supply voltage and
feature excellent propagation delay times (15ns).
The MAX3280E is a single receiver available in a 5-pin
SOT23 package. The MAX3281E (EN, active high) and
MAX3283E (EN, active low) are single receivers that
also contain an enable pin. Both the MAX3281E and
MAX3283E are available in a 6-pin SOT23 package.
The MAX3284E is a single receiver that contains a V
pin, which allows communication with low-level logic
included in digital FPGAs. The MAX3284E is available
in a 6-pin SOT23 package.
The MAX3284E’s low-level logic application allows
users to set the logic levels. A logic high level of 1.65V
will limit the maximum data rate to 20Mbps.
ESD-protection structures are incorporated on the
receiver input pins to protect against ESD encountered
during handling and assembly. The MAX3280E/
MAX3281E/MAX3283E/MAX3284E receiver inputs (A,
B) have extra protection against static electricity found
in normal operation. Maxim’s engineers developed
state-of-the-art structures to protect these pins against
MAX3280E MAX3281E
±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23
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5
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PIN
Detailed Description
RS-485/RS-422 True Fail-Safe Receivers
MAX3283E MAX3284E
±15kV ESD Protection
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5
6
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NAME
GND
V
RO
EN
EN
V
B
A
CC
L
L
Positive Supply: 3V
capacitor to GND.
Ground
Receiver Output. RO will be high if (V
be low if (V
Inverting Receiver Input
Receiver Output Enable. Drive EN low to enable RO. When
EN is high, RO is high impedance.
Receiver Output Enable. Drive EN high to enable RO. When
EN is low, RO is high impedance.
Low-Voltage Logic-Level Supply Voltage. V
voltage, ranging from 1.65V to V
up to V
Noninverting Receiver Input
±15kV ESD without damage. After an ESD event, this
family of parts continues working without latchup.
ESD protection can be tested in several ways. The
receiver inputs are characterized for protection to the
following:
• ±15kV using the Human Body Model
• ±6kV using the Contact Discharge method specified
• ±12kV using the Air-Gap Discharge method speci-
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
Figure 3a shows the Human Body Model, and Figure
3b 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 device through a
1.5kΩ resistor.
Since January 1996, all equipment manufactured
and/or sold in the European community has been
required to meet the stringent IEC 1000-4-2 specifica-
tion. The IEC 1000-4-2 standard covers ESD testing
and performance of finished equipment; it does not
specifically refer to integrated circuits. The
MAX3280E/MAX3281E/MAX3283E/MAX3284E help
in IEC 1000-4-2 (formerly IEC 801-2)
fied in IEC 1000-4-2 (formerly IEC 801-2)
L
. Bypass with a 0.1μF capacitor to GND.
A
- V
B
) -200mV.
V
CC
FUNCTION
5.5V. Bypass with a 0.1μF
CC
ESD Test Conditions
. RO output high is pulled
Human Body Model
Pin Description
A
- V
B
) -50mV. RO will
L
IEC 1000-4-2
is a user-defined
5