Page 1
19-0367; Rev 0; 2/95
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
_______________General Description
The MAX1482 and MAX1483 are low-power transceivers for RS-485 and RS-422 communication. Both
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables. Data rates are guaranteed up to 250kbps.
The MAX1482/MAX1483 draw only 20µA of supply current. Additionally, they have a low-current shutdown
mode that consumes only 0.1µA. Both parts operate
from a single +5V supply.
Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal
shutdown circuitry that places the driver outputs into a
high-impedance state. The receiver input has a fail-safe
feature that guarantees a logic-high output if the input
is open circuit.
The MAX1482 is full duplex and the MAX1483 is half
duplex. Both parts have a 1⁄8-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
________________________Applications
Low-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
____________________________Features
♦ Low 20µA Operating Current
♦ Slew-Rate Limited for Reduced EMI and
Reduced Reflections
♦ 0.1µA Low-Current Shutdown Mode
♦ Designed for RS-485 and RS-422 Applications
♦ Operate from a Single +5V Supply
♦ -7V to +12V Common-Mode Input Voltage Range
♦ Allows up to 256 Transceivers on the Bus—
1
Guaranteed (
⁄8-unit load)
♦ Current Limiting and Thermal Shutdown for
Driver Overload Protection
______________Ordering Information
PART
MAX1482CPD
MAX1482CSD
MAX1482EPD -40°C to +85°C
MAX1482ESD -40°C to +85°C 14 SO
MAX1483CPA
MAX1483CSA 0°C to +70°C 8 SO
MAX1483CUA 0°C to +70°C 8 µMAX
MAX1483EPA -40°C to +85°C 8 Plastic DIP
MAX1483ESA -40°C to +85°C 8 SO
TEMP. RANGE PIN-PACKAGE
0°C to +70°C
0°C to +70°C
14 Plastic DIP
14 SO
14 Plastic DIP
0°C to +70°C 8 Plastic DIP
MAX1482/MAX1483
_________Typical Operating Circuits
_________________Pin Configurations
TOP VIEW
+5V
R
1
RO
2
RE
3
DE
4
D
DI
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM
DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
8
7
6
5
MAX1483
V
CC
B
Rt
A
GND
Rt
DE
D
B
A
R
RE
DI
RO
RO
2
RE
3
DE
4
D
DI
DIP/SO
1
B
V
CC
2
MAX1483
RO
3
4
RE
R
1
µMAX
MAX1482 appears at end of data sheet.
________________________________________________________________
MAX1482 appears at end of data sheet.
Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
8
V
CC
7
B
6
A
5
GND
A
8
7
GND
DI
6
DE
5
1
Page 2
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC)...............................................................7V
Control Input Voltages (RE
Driver Input Voltage (DI).............................-0.5V to (V
Driver Output Voltages ..........................................-7.5V to 12.5V
Receiver Input Voltages (A, B) ..............................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.5V to (V
Continuous Power Dissipation (T
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) .800mW
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.
, DE).................-0.5V to (VCC+ 0.5V)
= +70°C)
A
CC
CC
+ 0.5V)
+ 0.5V)
DC ELECTRICAL CHARACTERISTICS
(VCC= 5V ±5%, TA= T
Differential Driver Output (no load)
MAX1482/MAX1483
Differential Driver Output
(with load)
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
Driver Common-Mode Output
Voltage
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
Three-State (high impedance)
Output Current at Driver
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Input Current
(A, B)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (high impedance)
Output Current at Receiver
Receiver Input Resistance
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
MIN
to T
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX
OD1
V
R = 50Ω (RS-422), Figure 1
OD2
R = 27Ω (RS-485), Figure 1
R = 27Ω or 50Ω, Figure 1
OD
R = 27Ω or 50Ω, Figure 1
OC
R = 27Ω or 50Ω, Figure 1
OD
MAX1482 only,
OZD
-7V < V
Y andVZ
DE, DI, –R—E
IH
DE, DI, –R—E
IL
DE, DI, –R—E
IN1
MAX1482,
DE = 0V, VCC= 0V or 5.25V
I
IN2
MAX1483,
DE = 0V, VCC= 0V or 5.25V
V
-7V ≤ VCM≤ 12V
TH
VCM= 0V
TH
IO= -4mA, VID= 200mV
OH
IO = 4mA, VID= -200mV
OL
0.4V ≤ VO≤ 2.4V
OZR
R
IN
–
–
–
8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)................667mW
8-Pin µMAX (derate 4.10mW/°C above +70°C).............330mW
Operating Temperature Ranges
MAX148_C_ _ .......................................................0°C to +70°C
MAX148_E_ _.....................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
CONDITIONS
25
1.5 5
< 12V
VIN= 12V
VIN= -7V
VIN= 12V
VIN= -7V
3.5V
150
-100
200
-150
0.4V
UNITSMIN TYP MAXSYMBOLPARAMETER
V5V
V
V0.2∆V
V3V
V0.2∆V
µA±50I
V2.0V
V0.8V
µA±2I
µA
V-0.2 0.2
mV75∆V
V
V
µA±1I
kΩ96-7V ≤ VCM≤ 12V
2 _______________________________________________________________________________________
Page 3
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= 5V ±5%, TA= T
No-Load Supply Current
Supply Current in Shutdown
Driver Short-Circuit Current
Receiver Short-Circuit Current
MIN
to T
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX
CONDITIONS
MAX1482,
RE = 0V or V
I
CC
MAX1483,
RE = 0V or V
DE = 0V, RE = V
SHDN
DI = high or low, -7V ≤ VO≤ 12V (Note 2)
OSD
0V ≤ VO≤ V
OSR
CC
CC
CC
DE = V
DE = 0V
DE = V
DE = 0V
CC
SWITCHING CHARACTERISTICS
(VCC= 5V ±5%, TA= T
PARAMETER SYMBOL MIN TYP MAX UNITS
Driver Input to Output
Driver Output Skew to Output
Driver Rise or Fall Time
Driver Enable to Output High t
Driver Enable to Output Low t
Driver Disable Time from Low t
Driver Disable Time from High t
Receiver Input to Output t
|t
- t
PLH
Receiver Skew
|Differential
PHL
Receiver Enable to Output Low t
Receiver Enable to Output High t
Receiver Disable Time from Low t
Receiver Disable Time from High t
Maximum Data Rate f
Time to Shutdown t
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown
to Output High
Receiver Enable from Shutdown
to Output Low
MIN
to T
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX
CONDITIONS
t
PLH
t
PHL
t
SKEW
tR, t
ZH
ZL
LZ
HZ
,
t
PLH
t
SKD
ZL
ZH
LZ
HZ
MAX
SHDN
t
ZH(SHDN)
t
ZL(SHDN)
t
ZH(SHDN)
t
ZL(SHDN)
Figures 3 and 5, R
CL1= CL2= 100pF
Figures 3 and 5, R
Figures 3 and 5, R
F
Figures 4 and 6, CL= 100pF, S2 closed
Figures 4 and 6, CL= 100pF, S1 closed
Figures 4 and 6, CL= 15pF, S1 closed
Figures 4 and 6, CL= 15pF, S2 closed
Figures 3 and 7, R
PHL
Figures 3 and 7, R
Figures 2 and 8, CRL= 15pF, S1 closed 90 ns
Figures 2 and 8, CRL= 15pF, S2 closed 90 ns
Figures 2 and 8, CRL= 15pF, S1 closed 90 ns
Figures 2 and 8, CRL= 15pF, S2 closed 90 ns
(Note 3) 50 200 600 ns
Figures 4 and 6, CL= 100pF, S2 closed 2 µs
Figures 4 and 6, CL= 100pF, S1 closed 2 µs
Figures 2 and 8, CL= 15pF, S2 closed,
A - B = 2V
Figures 2 and 8, CL= 15pF, S1 closed,
B - A = 2V
= 54Ω,
DIFF
= 54Ω, CL1= CL2= 100pF
DIFF
= 54Ω, CL1= CL2= 100pF
DIFF
= 54Ω, CL1= CL2= 100pF 0.25 2.25 µs
DIFF
= 54Ω, CL1= CL2= 100pF 160 ns
DIFF
CC
CC
UNITSMIN TYP MAXSYMBOLPARAMETER
25 45
20 35
55 85
µA
20 35
µA0.1 10I
mA35 250I
mA±7 ±95I
2
µs
2
800
ns
0.25 2 µs
0.2 2
0.1 2
µs
µs
0.3 3.0 µs
0.3 3.0 µs
250 kbps
3
µs
3
µs
MAX1482/MAX1483
Note 2: Applies to peak current. See
Typical Operating Characteristics.
Note 3: The MAX1482/MAX1483 are put into shutdown by bringing–R—E–high and DE low. If the inputs are in this state for less
than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See
Low-Power Shutdown Mode
section.
_______________________________________________________________________________________ 3
Page 4
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
RECEIVER PROPAGATION DELAY
1400
1300
1200
1100
1000
900
RECEIVER PROPAGATION DELAY (ns)
800
MAX1482/MAX1483
3.5
3.0
2.5
2.0
DIFFERENTIAL OUTPUT VOLTAGE (V)
1.5
vs. TEMPERATURE
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
R = 54Ω
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
MAX1482
SUPPLY CURRENT
80
70
60
50
40
30
SUPPLY CURRENT (µA)
20
10
0
vs. TEMPERATURE
DE = V
-40 -20 20 80 100
040
TEMPERATURE (°C)
MAX1482-01
DRIVER PROPAGATION DELAY (ns)
MAX1482-04
OUTPUT CURRENT (mA)
CC
DE = 0V
DRIVER PROPAGATION DELAY
1200
1100
1000
900
800
700
600
500
400
140
120
100
80
60
40
20
0
60
vs. TEMPERATURE
-40 -20 20 80 100
040
TEMPERATURE (°C)
OUTPUT CURRENT vs.
DRIVER OUTPUT LOW VOLTAGE
0246 10812
OUTPUT LOW VOLTAGE (V)
MAX1482-07
60
80
70
60
50
40
30
SUPPLY CURRENT (µA)
20
10
0
-40 -20 20 80 100
90
80
MAX1482-02
70
60
50
40
30
OUTPUT CURRENT (mA)
20
10
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
120
MAX1482-05
100
80
60
40
OUTPUT CURRENT (mA)
20
0
-7 -6 -4 -2 0 2 4-5 -3 -1 315
MAX1483
SUPPLY CURRENT
vs. TEMPERATURE
DE = V
DE = GND
040
TEMPERATURE (°C)
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
OUTPUT VOLTAGE (V)
OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
OUTPUT LOW VOLTAGE (V)
MAX1482-08
CC
60
MAX1482-03
MAX1482-06
4 _______________________________________________________________________________________
Page 5
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
______________________________________________________________Pin Description
PIN
MAX1482
DIP/SO
2 1
3 2
4 3
5 4
6, 7 5 Ground
9 — Noninverting Driver Output
10 — Inverting Driver Output
— 6 Noninverting Receiver Input and Noninverting Driver Output
12 — Noninverting Receiver Input
— 7 Inverting Receiver Input and Inverting Driver Output
11 — Inverting Receiver Input
14 8 Positive Supply: 4.75V to 5.25V
1, 8, 13
DIP/SO
—
MAX1483
µMAX
3
4
5
6
7
—
—
8
—
1
—
2
—
NAME
Receiver Output. With the receiver output enabled (RE low), RO is high if
RO
RE
DE
GND
V
N.C. No Connect—not internally connected
A > B by 200mV or when A and B are not connected, and RO is low if A < B
by 200mV.
Receiver Output Enable. When RE is low, RO is enabled. When RE is high, RO
is high impedance. If RE is high and DE is low, the MAX1482/MAX1483 enter
a low-power (0.1µA) shutdown state.
Driver Output Enable. The driver outputs, A and B, (Y and Z for the MAX1482)
are enabled by bringing DE high. When DE is low, the driver outputs are high
impedance, and the devices can function as line receivers if RE is low. If RE is
high and DE is low, the parts will enter a low-power (0.1µA) shutdown state. If
the driver outputs are enabled, the devices function as line drivers.
Driver Input. With DE high, a low on DI forces output Y low and output Z high,
DI
and a high on DI forces output Y high and output Z low.
Y
Z
A
A
B
B
CC
FUNCTION
MAX1482/MAX1483
_______________________________________________________________________________________
5
Page 6
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
_________________________________________________________________Test Circuits
Y
R
V
OD
R
V
OC
Z
MAX1482/MAX1483
Figure 1. Driver DC Test Load
3V
DE
Y
DI
Z
C
L1
A
R
V
DIFF
ID
C
B
L2
TEST POINT
RECEIVER
OUTPUT
C
15pF
RL
1k
Figure 2. Receiver Timing Test Load
RO
RE
OUTPUT
UNDER TEST
500Ω
C
L
1k
S1
S2
V
S1
S2
V
CC
CC
Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load
6 _______________________________________________________________________________________
Page 7
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
_______________________________________________________Switching Waveforms
3V
DI
1.5V
0V
Z
V
O
Y
1/2 V
O
V
O
V
DIFF
0V
10%
-V
O
t
R
t
90%
PLH
V
t
= V (Y) - V (Z)
DIFF
| t
SKEW =
Figure 5. Driver Propagation Delays
V
OH
RO
V
OL
V
ID
A-B
0V
-V
ID
1.5V
t
PHL
INPUT
- t
PLH
OUTPUT
1.5V
t
PHL
90%
t
F
|
PHL
t
PLH
1.5V
1/2 V
O
10%
0V
3V
DE
1.5V 1.5V
0V
t
, t
ZL(SHDN)
ZL
2.3V
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
2.3V
t
, t
ZH(SHDN)
Y, Z
Y, Z
V
OL
0V
t
t
ZH
HZ
Figure 6. Driver Enable and Disable Times
3V
RE
RO
RO
1.5V 1.5V
0V
t
, t
V
CC
0V
ZL(SHDN)
1.5V
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
1.5V
t
, t
ZH(SHDN)
t
LZ
ZL
t
ZH
HZ
LZ
V
+ 0.5V
OL
V
- 0.5V
OH
VOL + 0.5V
V
- 0.5V
OH
MAX1482/MAX1483
Figure 8. Receiver Enable and Disable TimesFigure 7. Receiver Propagation Delays
_______________________________________________________________________________________ 7
Page 8
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
100pF
Z
D
R = 54Ω
Y
100pF
10dB/div
0Hz 500kHz/div 5MHz
, tF < 6ns
t
R
TTL IN
B
A
RECEIVER
R
OUT
Figure 9. Driver Output Waveform and FFT, Transmitting
Figure 10. Receiver Propagation-Delay Test Circuit
250kbps (125kHz) Signal
MAX1482/MAX1483
Table 1. Transmitting Table 2. Receiving
INPUTS OUTPUTS
RE
X
X
X
X = Don't Care
High-Z = High Impedance
DE DI Z Y
1
1
0
1
0
X
0
1
High-Z
High-Z
1
0
__________Applications Information
The MAX1482/MAX1483 are low-power transceivers for
RS-485 and RS-422 communications. The MAX1482
and MAX1483 are specified for data rates of at least
250kbps. The MAX1482 is a full-duplex transceiver
while the MAX1483 is half duplex. When disabled, the
driver and receiver outputs are high impedance.
The 96kΩ, 1/8-unit-load receiver input impedance of the
MAX1482/MAX1483 allows up to 256 transceivers on a
bus, compared to the 1-unit load (12kΩ input impedance) of standard RS-485 drivers (32 transceivers maximum). Any combination of MAX1482/MAX1483 and
other RS-485 transceivers with a total of 32 unit loads or
less can be put on the bus.
RE DE
0
0
0
1
X = Don't Care
High-Z = High Impedance
DE = 0 for MAX1483 and is a Don't Care for MAX1482.
*
The MAX1482/MAX1483 are slew-rate limited, minimizing EMI and reducing reflections caused by improperly
terminated cables. Figure 9 shows both the driver output waveform of a MAX1482/MAX1483 transmitting a
125kHz signal and the Fourier analysis of that signal.
High-frequency harmonics have much lower amplitudes, and the potential for EMI is significantly reduced.
INPUTS OUTPUT
*
0
0
0
0
A-B RO
> +0.2V
< -0.2V
Inputs open
X
1
0
1
High-Z
Reduced EMI and Reflections
8 _______________________________________________________________________________________
Page 9
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
MAX1482/MAX1483
A
500mV/div
B
RO
5V/div
500ns/div
Figure 11. Receiver t
PHL
Low-Power Shutdown Mode
A low-power shutdown mode is initiated by bringing RE
high and DE low. The devices will not shut down unless
both the driver and receiver are disabled. In shutdown, the devices typically draw only 0.1µA of supply
current.
RE and DE may be driven simultaneously; the parts are
guaranteed not to enter shutdown if RE is high and DE
is low for less than 50ns. If the inputs are in this state for
at least 600ns, the parts are guaranteed to enter shutdown.
For the receiver, the tZHand tZLenable times assume
the part was not in the low-power shutdown state. The
t
ZH(SHDN)
parts were shut down (see
and t
ZL(SHDN)
enable times assume the
Electrical Characteristics
).
It takes the receivers longer to become enabled from
the low-power shutdown state (t
ZH(SHDN)
, t
ZL(SHDN)
than from the operating mode (tZH, tZL). (The parts are
in operating mode if the RE , DE inputs equal a logical
0,1 or 1,1 or 0,0.)
B
500mV/div
A
5V/div
RO
500ns/div
Figure 12. Receiver t
PLH
Driver Output Protection
Excessive output current and power dissipation caused
by faults or by bus contention are prevented by two
mechanisms. A foldback current limit on the output
stage provides immediate protection against short circuits over the whole common-mode voltage range (see
Typical Operating Characteristics
). In addition, a thermal shutdown circuit forces the driver outputs into a
high-impedance state if the die temperature rises
excessively.
Propagation Delay
Digital encoding schemes depend on the driver and
receiver skew. Skew is defined as the difference
between the rising and falling propagation delay times.
Typical propagation delays are shown in Figures 11
and 12 using Figure 10’s test circuit.
)
The difference in receiver delay times, | t
PLH
typically under 160ns.
The driver skew times are typically 160ns (800ns max).
- t
|, is
PHL
_______________________________________________________________________________________ 9
Page 10
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
DI
RECEIVER
INPUT
V
Y-VZ
R
O
MAX1482/MAX1483
Figure 13. System Differential Voltage at 250kbps (125kHz)
Driving 4000 Feet of Cable
DI
DE
RO
RE
D
R
MAX1483
2µs/div
B
A
120Ω
B
D
The RS-485/RS-422 standard covers line lengths up to
Line Length vs. Data Rate
4000 feet. For line lengths greater than 4000 feet, see
5
0
Figure 16.
Figure 13 shows the system differential voltage for the
parts driving 4000 feet of 26AWG twisted-pair wire at
110kHz into 120Ω loads. Even after 4000 feet of cable,
1
0
-1
the MAX1482/MAX1483 output shows virtually no distortion.
Typical Applications
The MAX1482/MAX1483 transceivers are designed for
bidirectional data communications on multipoint bus
transmission lines. Figures 14 and 15 show typical net-
5
0
work applications circuits. These parts can also be
used as line repeaters, with cable lengths longer than
4000 feet, as shown in Figure 16.
To minimize reflections, the line should be terminated at
both ends in its characteristic impedance, and stub
lengths off the main line should be kept as short as
possible (although the slew-rate-limited MAX1482 and
MAX1483 are more tolerant of imperfect termination
than standard RS-485 ICs).
Isolated RS-485
For isolated RS-485 applications, see the MAX253 and
MAX1480 data sheets.
120Ω
B
D
A
R
B
A
D
A
R
R
DE
DI
RO
RE
DE
DI RO DE
Figure 14. MAX1483 Typical Half-Duplex RS-485 Network
10 ______________________________________________________________________________________
DI
RO
RERE
Page 11
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
MAX1482/MAX1483
A
120Ω
RO
RE
DE
DI
R
B
Z
D
120Ω
Y
Z
Y
D
DI DIRO RO
DE DE
NOTE: RE AND DE ON.
Figure 15. MAX1482 Full-Duplex RS-485 Network
MAX1482
A
RO
R
RE
DE
DI
D
120Ω
B
Z
120Ω
Y
Y
120Ω
Z
B
120Ω
Z
AA
BB
R
Y
R
D
RE
RE
R
A
MAX1482
DI
D
DE
RE
RO
Typical Operating Circuits
________________________(continued)
VCCRE
Rt
R
GND DE
DATA IN
DATA OUT
DE V
CC
144
5
DI
D
2
RO
1, 8, 13
N.C.
RD
3 6, 7
RE GND
MAX1482
9
Y
10
Z
12
A
Rt
11
B
RO
DI
NOTE: RE AND DE ON.
Figure 16. Line Repeater for MAX1482
______________________________________________________________________________________ 11
Page 12
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
__________________Chip Information____Pin Configurations (continued)
TOP VIEW
TRANSISTOR COUNT: 294
MAX1482
1
N.C.
R
2
RO
3
RE
4
DE
5
DI
6
GND
7
GND
MAX1482/MAX1483
DIP/SO
14
V
CC
13
N.C.
A
12
B
11
10
D
Z
9
Y
N.C.
8
________________________________________________________Package Information
INCHES MILLIMETERS
DIM
A
A1
B
C
D
E
e
H
L
α
0.101mm
0.004 in
C
L
A
e
A1B
α
MIN
0.036
0.004
0.010
0.005
0.116
0.116
0.188
0.016
0°
MAX
0.044
0.008
0.014
0.007
0.120
0.120
0.198
0.026
6°
MIN
0.91
0.10
0.25
0.13
2.95
2.95
4.78
0.41
0°
MAX
1.11
0.20
0.36
0.18
3.05
3.05
0.650.0256
5.03
0.66
6°
E H
8-PIN µMAX
MICROMAX SMALL OUTLINE
PACKAGE
D
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
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.
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12
__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
12
__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
12
__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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