Operating Temperature Range (Note 2) ........ -40NC to +125NC
Junction Temperature .................................................. +150NC
Storage Temperature Range ......................... -65NC to +150NC
Lead Temperature (soldering, 10s) ...............................+300NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Note 2:
Operation is specified with junction temperatures up to +150°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
DC Electrical Characteristics
(V
CC
= +3.0V to +3.6V, T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Notes 3, 4)
PARAMETER
POWER SUPPLY
Supply Voltage
V
CC
I
CC
I
SH
V
OD
DV
OD
V
OC
DV
OC
V
OH
V
OL
|I
OSD
|
DE =
RE
= V
CC
, or
DE =
RE
= GND, or
DE = V
CC
,
RE
= GND,
DI = V
CC
or GND, no load
DE = GND and
RE
= V
CC
R
L
= 54I, Figure 1
R
L
= 54I, Figure 1 (Note 5)
R
L
= 54I, Figure 1
R
L
= 54I, Figure 1 (Note 5)
A/B output, I
OUT
= -20mA
A/B output, I
OUT
= 20mA
0V
P
V
OUT
P
+12V, output low
-7V
P
V
OUT
P
V
CC
, output high
DE = GND,
V
CC
= GND or +3.6V
V
IN
= +12V
V
IN
= -7V
-800
12
250
1000
-0.2
2.2
0.8
250
1.5
-0.2
0
V
CC
/2
+0.2
3
0.2
3.0
3.6
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
1.5
4
mA
Shutdown Supply Current
DRIVER
Differential Driver Output
Change in Magnitude of
Differential Output Voltage
Driver Common-Mode Output
Voltage
Change in Common-Mode
Voltage
Single-Ended Driver Output High
Single-Ended Driver Output Low
Driver Short-Circuit Output
Current
RECEIVER
Input Current (A and B)
Differential Input Capacitance
10
FA
V
V
V
V
V
V
mA
I
A,B
C
A,B
FA
pF
Between A and B, DE = GND, f = 2MHz
www.maximintegrated.com
Maxim Integrated
│
2
MAX14840E/MAX14841E
40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
DC Electrical Characteristics (continued)
(V
CC
= +3.0V to +3.6V, T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Notes 3, 4)
PARAMETER
Receiver Differential Threshold
Voltage (MAX14840E Only)
Receiver Input Hysteresis
(MAX14840E Only)
Receiver Differential Threshold
Voltage (MAX14841E Only)
Receiver Input Hysteresis
(MAX14841E Only)
LOGIC INTERFACE
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Current
Input Impedance on First
Transition
Output High Voltage
Output Low Voltage
Three-State Output Current at
Receiver
Receiver Output Short-Circuit
Current
PROTECTION
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
ESD Protection: A, B to GND
ESD Protection: All Other Pins
T
TS
T
TSH
IEC 61000-4-2 Air Gap Discharge
IEC 61000-4-2 Contact Discharge
HBM
HBM
160
15
Q20
Q12
Q35
Q2
kV
kV
NC
NC
V
OH
V
OL
I
OZR
I
OSR
V
IH
V
IL
V
HYS
I
IN
DE, DI
RE
DE, DI,
RE
DE, DI,
RE
DE, DI,
RE
DE,
RE
RE
= GND, I
O
= -1mA, V
A
- V
B
> 200mV
RE
= GND, I
O
= 1mA, V
A
- V
B
< -200mV
RE
= V
CC
, 0V
P
V
O
P
V
CC
0V
P
V
RO
P
V
CC
-1
-95
-1
1
V
CC
-
1.5
0.4
+1
+95
50
+1
10
2.0
2.0
0.8
5.5
V
V
mV
FA
kI
V
V
FA
mA
V
TH
DV
TH
SYMBOL
V
THF
V
THR
CONDITIONS
-7V
P
V
CM
P
12V, V
OD
falling
-7V
P
V
CM
P
12V, V
OD
rising
V
CM
= 0V
-7V
P
V
CM
P
12V
V
CM
= 0V
MIN
-200
10
20
-200
170
-105
10
-10
TYP
MAX
-10
200
UNITS
mV
mV
mV
mV
mV
Switching Characteristics
(V
CC
= +3.0V to +3.6V, T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Notes 2, 3)
PARAMETER
DRIVER
Propagation Delay
Differential Driver Output Skew
|t
DPLH
- t
DPHL
|
t
DPLH
t
DPHL
t
DSKEW
R
L
= 54I, C
L
= 50pF, Figures 2 and 3
(Note 6)
R
L
= 54I, C
L
= 50pF, Figures 2 and 3
(Notes 6, 9)
5
5
12
12
20
20
2
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
www.maximintegrated.com
Maxim Integrated
│
3
MAX14840E/MAX14841E
40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Switching Characteristics (continued)
(V
CC
= +3.0V to +3.6V, T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Notes
3, 4)
Driver Differential Output Rise or
Fall Time
PARAMETER
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Driver Enable from Shutdown to
Output Low
Driver Enable from Shutdown to
Output High
Time to Shutdown
RECEIVER
Propagation Delay
Receiver Output Skew
Maximum Data Rate
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable Time from Low
Receiver Disable Time from High
Receiver Enable from Shutdown
to Output Low
Receiver Enable from Shutdown
to Output High
Time to Shutdown
t
RPLH
t
RPHL
t
RSKEW
DR
MAX
t
RZH
t
RZL
t
RLZ
t
RHZ
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
C
L
= 15pF, Figures 6 and 7 (Note 6)
C
L
= 15pF, Figures 6 and 7 (Notes 6, 9)
40
20
20
20
20
4
4
50
800
25
25
2
ns
ns
Mbps
ns
ns
ns
ns
Fs
Fs
ns
t
HL
, t
LH
SYMBOL
DR
MAX
t
DZH
t
DZL
t
DLZ
t
DHZ
t
DZL(SHDN)
t
DZH(SHDN)
t
SHDN
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 6, 7)
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 6, 7)
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 6, 7)
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 5, 6)
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 6, 7)
R
L
= 110I, C
L
= 50pF, Figures 4 and 5
(Notes 6, 7)
(Note 8)
50
R
L
= 54I, C
L
= 50pF, Figures 2 and 3
(Notes 6, 9)
CONDITIONS
MIN
40
30
30
30
30
4
4
800
TYP
7.5
MAX
ns
UNITS
Mbps
ns
ns
ns
ns
Fs
Fs
ns
t
RZL(SHDN)
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
t
RZH(SHDN)
R
L
= 1kI, C
L
= 15pF, Figure 8 (Notes 6, 7)
t
SHDN
(Note 8)
Note 3:
All devices are 100% production tested at T
A
= +25NC. Specifications for all temperature limits are guaranteed by design.
Note 4:
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 5:
DV
OD
and
DV
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes state.
Note 6:
Capacitive load includes test probe and fixture capacitance.
Note 7:
The timing parameter refers to the driver or receiver enable delay when the device has exited the initial hot-swap protect
state and is in normal operating mode.
Note 8:
Shutdown is enabled by driving
RE
high and DE low. The device is guaranteed to have entered shutdown after t
SHDN
has
elapsed.
Note 9:
Parameter is guaranteed by characterization and not production tested.
传感器
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
