MAX328_EA__ ............................................. -40°C to +125°C
Storage Temperature Range ............................ -65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) ....................................... +260°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.
(V
CC
= 3V to 5.5V, V
L
= V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= 5V and T
A
= +25°C.) (Notes 2, 3)
PARAMETER
Supply Voltage
Supply Current
V
L
Input Range
V
L
Supply Current
RECEIVER
Input Current (A and B)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Enable Input Low
Receiver Enable Input High
Receiver Enable Input Leakage
Receiver Output High Voltage
I
A, B
V
TH
∆V
TH
V
ENIL
V
ENIH
I
LEAK
V
OH
V
CC
= V
GND
or 5.5V
V
IN
= +12V
V
IN
= -7V
-200
-125
25
0.4
2
±10
V
CC
- 0.4
V
250
-200
-50
µA
mV
mV
V
V
µA
SYMBOL
V
CC
I
CC
V
L
I
L
No load
MAX3284E
No load (MAX3284E)
1.65
CONDITIONS
MIN
3.0
9
TYP
MAX
5.5
15
V
CC
10
UNITS
V
mA
V
µA
Electrical Characteristics
-7V ≤ V
CM
≤ +12V (Note 4)
V
A
+ V
B
= 0V
MAX3281E, MAX3283E only
MAX3281E, MAX3283E only
MAX3281E, MAX3283E only
MAX3280E/MAX3281E/MAX3283E,
I
OH
= -4mA, RO high
MAX3284E, I
OH
= -1mA, 1.65V ≤ V
L
≤ V
CC
,
V
L
- 0.4
RO high
MAX3280E/MAX3281E/MAX3283E,
IOL = 4mA, RO low
MAX3284E, I
OL
= 1mA, 1.65V ≤ V
L
≤ V
CC
,
RO low
0 ≤ V
O
≤ V
CC
, RO = high impedance
-7V ≤ V
CM
≤ +12V (Note 5)
0 ≤ V
RO
≤ V
CC
48
±130
0.4
Receiver Output Low Voltage
V
OL
V
0.4
±5
µA
kW
mA
Three-State Output Current at
Receiver
Receiver Input Resistance
Receiver Output Short-Circuit
Current
ESD PROTECTION
I
OZR
R
IN
I
OSR
Human Body Model
ESD Protection (A, B)
IEC1000-4-2 (Air-Gap Discharge)
IEC1000-4-2 (Contact Discharge)
±15
±12
±6
kV
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Maxim Integrated
│
2
MAX3280E/MAX3281E/
MAX3283E/MAX3284E
Switching Characteristics
±15kV ESD-Protected 52Mbps, 3V to 5.5V,
SOT23 RS-485/RS-422 True Fail-Safe Receivers
(V
CC
= 3V to 5.5V, V
L
= V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= 5V and T
A
= +25°C.) (Notes 2, 3)
PARAMETER
Maximum Data Rate
Receiver Propagation Delay
Receiver Output |t
PLH
- t
PHL
|
Device-to-Device Propagation
Delay Matching
SYMBOL
f
MAX
t
PLH
t
PHL
t
PSKEW
CONDITIONS
C
L
= 15pF (Notes 5, 6)
Figure 1, C
L
= 15pF, V
ID
= 2V, V
CM
= 0V
Figure 1, C
L
= 15pF, V
ID
= 2V, V
CM
= 0V
Figure 1, C
L
= 15pF, T
A
= +25°C
Same power supply, maximum temperature
difference between devices = +30°C
(Note 5)
t
PRZL
t
PRZH
t
PRLZ
t
PRHZ
Figure 2, C
L
= 15pF
Figure 2, C
L
= 15pF
Figure 2, C
L
= 15pF
Figure 2, C
L
= 15pF
MIN
52
7
8
15
15
2
8
TYP
MAX
UNITS
Mbps
ns
ns
ns
ENABLE/DISABLE TIME FOR MAX3281E/MAX3283E
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
500
500
500
500
ns
ns
ns
ns
Note 2:
Parameters are 100% production tested at +25°C, limits over temperature are guaranteed by design.
Note 3:
All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device
ground, unless otherwise noted.
Note 4:
V
CM
is the common-mode input voltage. V
ID
is the differential input voltage.
Note 5:
Not production tested. Guaranteed by design.
Note 6:
See Table 2 for MAX3284E data rates with V
L
< V
CC
.
Typical Operating Characteristics
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
RECEIVER OUTPUT LOW VOLTAGE
vs. OUTPUT CURRENT
MAX3280/1/3/4E toc01
RECEIVER OUTPUT HIGH VOLTAGE
vs. OUTPUT CURRENT
MAX3280/1/3/4E toc02
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
RECEIVER OUTPUT HIGH VOLTAGE (V)
V
CC
= 5V
4.5
4.0
3.5
V
CC
= 3.3V
3.0
2.5
V
A
= 1V, B = GND, I
OH
= -4mA
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
MAX3280/1/3/4E toc03
5
4
3
2
1
0
5
4
3
2
1
0
V
CC
= 3.3V
5.0
OUTPUT VOLTAGE (V)
V
CC
= 3.3V
V
CC
= 5V
0
10
20
30
40
50
60
OUTPUT VOLTAGE (V)
V
CC
= 5V
-50
-40
-30
-20
-10
0
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
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Maxim Integrated
│
3
MAX3280E/MAX3281E/
MAX3283E/MAX3284E
±15kV ESD-Protected 52Mbps, 3V to 5.5V,
SOT23 RS-485/RS-422 True Fail-Safe Receivers
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
RECEIVER OUTPUT LOW VOLTAGE (mV)
MAX3280/1/3/4E toc04
RECEIVER PROPAGATION DELAY (t
PLH
)
vs. TEMPERATURE
MAX3280/1/3/4E toc05
RECEIVER PROPAGATION DELAY (t
PHL
)
vs. TEMPERATURE
MAX3280/1/3/4E toc06
200
9
8
7
6
5
V
CC
= 5V
V
CC
= 3.3V
10
150
V
CC
= 3.3V
V
CC
= 5V
9
t
PHL
(ns)
V
CC
= 5V
8
V
CC
= 3.3V
100
50
A = GND, V
B
= 1V, I
OL
= 4mA
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
t
PLH
(ns)
7
0
4
-50
-25
0
25
50
75
100
125
6
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY CURRENT vs. TEMPERATURE
V
CC
= 5V
SUPPLY CURRENT (mA)
8
MAX3280/1/3/4E toc07
MAX3284E MAXIMUM DATA RATE
vs. VOLTAGE LOGIC LEVEL
MAX3280/1/3/4E toc08
9
60
7
DATA RATE (Mbps)
50
40
6
V
CC
= 3.3V
5
-50
-25
0
25
50
75
100
125
30
20
1.5
2.5
3.5
4.5
5.5
TEMPERATURE (°C)
VOLTAGE LOGIC LEVEL (V)
SUPPLY CURRENT vs. DATA RATE
I
CC
, V
CC
= V
L
= 5V
MAX3280/1/3/4E toc09
V
L
SUPPLY CURRENT
vs. TEMPERATURE
MAX3280/1/3/4 toc10
10
8
6
4
2
10
V
L
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
1
I
CC
, V
CC
= V
L
= 3.3V
I
L
, V
CC
= V
L
= 5V
V
CC
= V
L
= 5V
DATA RATE = 52Mbps V
CC
= V
L
= 3.3V
DATA RATE = 52Mbps
0.1
V
CC
= V
L
= 5V
DATA RATE = 100kbps
V
CC
= V
L
= 3.3V
DATA RATE = 100kbps
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
0.01
I
L
, V
CC
= V
L
= 3.3V
0
0.001
10
100
1000
10,000
100,000
DATA RATE (kbps)
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Maxim Integrated
│
4
MAX3280E/MAX3281E/
MAX3283E/MAX3284E
Pin Description
PIN
MAX3280E
1
2
3
4
—
—
—
5
MAX3281E
1
2
3
4
—
5
—
6
MAX3283E
1
2
3
4
5
—
—
6
±15kV ESD-Protected 52Mbps, 3V to 5.5V,
SOT23 RS-485/RS-422 True Fail-Safe Receivers
MAX3284E
1
2
3
4
—
—
5
6
NAME
V
CC
GND
RO
B
EN
EN
V
L
A
FUNCTION
Positive Supply: 3V ≤ V
CC
≤ 5.5V. Bypass with a 0.1µF
capacitor to GND.
Ground
Receiver Output. RO will be high if (V
A
- VB)
≥ -50mV. RO will
be low if (V
A
- V
B
) ≤ -200mV.
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
L
is a user-defined
voltage, ranging from 1.65V to V
CC
. RO output high is pulled
up to V
L
. Bypass with a 0.1µF capacitor to GND.
Noninverting Receiver Input
Detailed Description
The MAX3280E/MAX3281E/MAX3283E/MAX3284E are
single, true fail-safe receivers designed to operate at data
rates up to 52Mbps. The fail-safe architecture guarantees
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 func-
tion 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
L
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.
±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
in IEC 1000-4-2 (formerly IEC 801-2)
●
±12kV using the Air-Gap Discharge method specified
in IEC 1000-4-2 (formerly IEC 801-2)
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
±15kV
ESD Protection
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 interest,
which is then discharged into the device through a 1.5kW
resistor.
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
IEC 1000-4-2
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 test-
ing and performance of finished equipment; it does
not specifically refer to integrated circuits. The
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