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MAX491MJD

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
4 Maxim Integrated
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
300 1000
Figures 7 and 9, C
L
= 100pF, S2 closed
Figures 7 and 9, C
L
= 100pF, S1 closed
Figures 5 and 11, C
L
= 15pF, S2 closed,
A - B = 2V
CONDITIONS
ns40 100t
ZH(SHDN)
Driver Enable from Shutdown to
Output High (MAX481)
ns
Figures 5 and 11, C
L
= 15pF, S1 closed,
B - A = 2V
t
ZL(SHDN)
Receiver Enable from Shutdown
to Output Low (MAX481)
ns40 100t
ZL(SHDN)
Driver Enable from Shutdown to
Output Low (MAX481)
ns300 1000t
ZH(SHDN)
Receiver Enable from Shutdown
to Output High (MAX481)
UNITSMIN TYP MAXSYMBOLPARAMETER
t
PLH
t
SKEW
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
t
PHL
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Driver Input to Output
Driver Output Skew to Output ns100 800
ns
ns2000
MAX483/MAX487, Figures 7 and 9,
C
L
= 100pF, S2 closed
t
ZH(SHDN)
Driver Enable from Shutdown to
Output High
250 2000
ns2500
MAX483/MAX487, Figures 5 and 11,
C
L
= 15pF, S1 closed
t
ZL(SHDN)
Receiver Enable from Shutdown
to Output Low
ns2500
MAX483/MAX487, Figures 5 and 11,
C
L
= 15pF, S2 closed
t
ZH(SHDN)
Receiver Enable from Shutdown
to Output High
ns2000
MAX483/MAX487, Figures 7 and 9,
C
L
= 100pF, S1 closed
t
ZL(SHDN)
Driver Enable from Shutdown to
Output Low
ns50 200 600MAX483/MAX487 (Note 5) t
SHDN
Time to Shutdown
t
PHL
t
PLH
, t
PHL
< 50% of data period
Figures 5 and 11, C
RL
= 15pF, S2 closed
Figures 5 and 11, C
RL
= 15pF, S1 closed
Figures 5 and 11, C
RL
= 15pF, S2 closed
Figures 5 and 11, C
RL
= 15pF, S1 closed
Figures 7 and 9, C
L
= 15pF, S2 closed
Figures 6 and 10, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 7 and 9, C
L
= 15pF, S1 closed
Figures 7 and 9, C
L
= 100pF, S1 closed
Figures 7 and 9, C
L
= 100pF, S2 closed
CONDITIONS
kbps250f
MAX
250 800 2000
Maximum Data Rate
ns20 50t
HZ
Receiver Disable Time from High
ns
250 800 2000
20 50t
LZ
Receiver Disable Time from Low
ns20 50t
ZH
Receiver Enable to Output High
ns20 50t
ZL
Receiver Enable to Output Low
ns
ns
100
300 3000t
HZ
t
SKD
Driver Disable Time from High
I t
PLH
- t
PHL
I Differential
Receiver Skew
Figures 6 and 10, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
ns300 3000t
LZ
Driver Disable Time from Low
ns250 2000t
ZL
Driver Enable to Output Low
ns
Figures 6 and 8, R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
ns250 2000t
R
, t
F
250 2000
Driver Rise or Fall Time
ns
t
PLH
Receiver Input to Output
250 2000t
ZH
Driver Enable to Output High
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
30
0
02.5
OUTPUT CURRENT vs.
RECEIVER OUTPUT LOW VOLTAGE
5
25
MAX481-01
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
1.5
15
10
0.5 1.0 2.0
20
35
40
45
0.9
0.1
-50 -25 25 75
RECEIVER OUTPUT LOW VOLTAGE vs.
TEMPERATURE
0.3
0.7
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
050
0.5
0.8
0.2
0.6
0.4
0
100
125
MAX481-04
I
RO
= 8mA
-20
-4
1.5 2.0 3.0 5.0
OUTPUT CURRENT vs.
RECEIVER OUTPUT HIGH VOLTAGE
-8
-16
MAX481-02
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
2.5 4.0
-12
-18
-6
-14
-10
-2
0
3.5 4.5
4.8
3.2
-50 -25 25 75
RECEIVER OUTPUT HIGH VOLTAGE vs.
TEMPERATURE
3.6
4.4
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)
050
4.0
4.6
3.4
4.2
3.8
3.0
100
125
MAX481-03
I
RO
= 8mA
90
0
0 1.0 3.0 4.5
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
10
70
MAX481-05
DIFFERENTIAL OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
2.0 4.0
50
30
80
60
40
20
0.5 1.5 2.5 3.5
2.3
1.5
-50 -25 25 125
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
1.7
2.1
MAX481-06
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)
075
1.9
2.2
1.6
2.0
1.8
10050
2.4
R = 54
Ω
__________________________________________Typical Operating Characteristics
(V
CC
= 5V, T
A
= +25°C, unless otherwise noted.)
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
Maxim Integrated 5
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS
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.
Note 2: All typical specifications are given for V
CC
= 5V and T
A
= +25°C.
Note 3: Supply current specification is valid for loaded transmitters when DE = 0V.
Note 4: Applies to peak current. See
Typical Operating Characteristics.
Note 5: The MAX481/MAX483/MAX487 are put into shutdown by bringing RE 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 (MAX481/MAX483/MAX487)
section.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
____________________________Typical Operating Characteristics (continued)
(V
CC
= 5V, T
A
= +25°C, unless otherwise noted.)
120
0
08
OUTPUT CURRENT vs.
DRIVER OUTPUT LOW VOLTAGE
20
100
MAX481-07
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
6
60
40
24
80
10
12
140
-120
0
-7 -5 -1 5
OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
-20
-80
MAX481-08
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
-3 1
-60
3
-6 -4 -2 0 2 4
-100
-40
100
-40-60 -20 40 100 120
MAX1487
SUPPLY CURRENT vs. TEMPERATURE
300
MAX481-13
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
20 60 80
500
200
600
400
0
0
140
MAX1487; DE = V
CC
, RE = X
MAX1487; DE = 0V, RE = X
100
-50 -25 50 100
MAX481/MAX485/MAX490/MAX491
SUPPLY CURRENT vs. TEMPERATURE
300
MAX481-11
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
25 75
500
200
600
400
0
0
125
MAX481/MAX485; DE = V
CC
, RE = X
MAX481; DE = 0, RE = V
CC
MAX485; DE = 0, RE = X,
MAX481; DE = RE = 0
MAX490/MAX491; DE = RE = X
100
-50 -25 50 100
MAX483/MAX487–MAX489
SUPPLY CURRENT vs. TEMPERATURE
300
MAX481-12
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
25 75
500
200
600
400
0
0
125
MAX483; DE = V
CC
, RE = X
MAX487; DE = V
CC
, RE = X
MAX483/MAX487; DE = 0, RE = V
CC
MAX483/MAX487; DE = RE = 0,
MAX488/MAX489; DE = RE = X
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
6 Maxim Integrated
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX491MJD

Mfr. #:
Buy MAX491MJD
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC MAX491MJD
Lifecycle:
New from this manufacturer.
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