19-0879; Rev 0; 7/07
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
The MAX13181E–MAX13184E are full-duplex and selectable half-/full-duplex RS-485 transceivers in a tiny 2mm x
2mm µDFN package. These devices are designed for
space-constrained applications by including extended
ESD protection to ±15kV per Human Body Model (HBM)
and integrating pullup/pulldown resistors on the DE, RE
and H/F inputs to reduce external components. The
MAX13182E/MAX13184E feature a low-current shutdown
mode for power-sensitive applications.
These devices have a 1/8 unit-load input receiver
that allows up to 256 transceivers on the bus. The
MAX13181E/MAX13182E feature reduced slew-rate
drivers to minimize EMI and reflections that are caused
by improperly terminated cables. The slew-rate limited
MAX13181E/MAX13182E allow error-free data transmission up to 250kbps. The MAX13183E/MAX13184E feature
full-speed drivers, allowing data rates of up to 16Mbps.
The MAX13182E/MAX13184E are configured for fullduplex operation, while the MAX13181E/MAX13183E
feature pin-selectable half- or full-duplex operation. All
driver outputs and receiver inputs include extended
ESD protection.
The MAX13181E–MAX13184E are available in a tiny 10pin, 2mm x 2mm µDFN. The MAX13183E/MAX13184E are
also available in industry-standard 14-pin SO packages.
The devices operate over the extended -40°C to +85°C
temperature range.
Features
o Available in Tiny, 10-Pin, 2mm x 2mm, µDFN and
14-Pin SO Packages
o +5.0V Operation
o Extended ESD Protection
±15kV Human Body Model
±12kV IEC 61000-4-2 Air-Gap Disharge
±6kV IEC 61000-4-2 Contact Disharge
o Slew-Rate Limiting Facilitates Error-Free Data
Transmission (MAX13181E/MAX13182E)
o 2.5µA (typ) Low-Current Shutdown Mode
o 1/8-Unit Load Allows Up to 256 Transceivers on
the Bus
Pin Configurations
TOP VIEW
A
10
Security System
Motor Drive Control
Instrumentation
Z
8
Y
7
GND
6
A
10
MAX13181E
MAX13183E
B
9
Y
7
Z
8
GND
6
MAX13182E
MAX13184E
+
+
1
Applications
Industrial Control
B
9
2
3
4
5
VCC RO H/F DE
DI
1
2
VCC RO
µDFN
3
4
5
RE
DE
DI
µDFN
Pin Configurations continued at end of data sheet.
Telecom
Selector Guide
PART
HALF/FULL
DUPLEX
MAXIMUM DATA
RATE
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER
ENABLE
MAX13181E
Selectable
250 kbps
Yes
No
No
MAX13182E
Full
250 kbps
Yes
Yes
Yes
MAX13183E
Selectable
16 Mbps
No
No
No
MAX13184E
Full
16 Mbps
No
Yes
Yes
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX13181EELB+
-40°C to +85°C
MAX13182EELB+
-40°C to +85°C
MAX13182EESD+
-40°C to +85°C
14 SO
+Denotes a lead-free package.
TOP MARK
PKG CODE
10 µDFN
ABC
L1022-1
10 µDFN
ABD
L1022-1
—
S14-1
Ordering Information continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX13181E–MAX13184E
General Description
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
Supply Voltage (VCC) ...............................................-0.3V to +6V
Control Voltage (RE, DE, DI, H/F).............................-0.3V to +6V
Driver Output Voltage (A, B, Y, Z) ..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Input Voltage Full-Duplex (A, B)..............-8V to +12.5V
Receiver Output Voltage (RO)................... -0.3V to (VCC + 0.3V)
Short-Circuit Duration (A, B, Y, Z) to GND .................Continuous
Continuous Power Dissipation (TA = +70°C)
10-Pin µDFN (derate 5mW/°C above +70°C ) .............403mW
14-Pin SO (derate 8.3mW/°C above +70°C )...............667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V ±10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
DRIVER
Differential Driver Output
Change in Magnitude of Differential
Output Voltage
Driver Common-Mode Output Voltage
Change in Magnitude
of Common-Mode Voltage
VOD
ΔVOD
VOC
ΔVOC
RL = 100Ω (RS422), Figure 1
2
VCC
RL = 54Ω (RS485), Figure 1
1.5
VCC
VCC
RL = 100Ω or 54Ω, Figure 1, (Note 2)
0.2
V
3
V
0.2
V
RL = 100Ω or 54Ω, Figure 1
VIH
DE, DI, RE, H/F
Input-Low Voltage
VIL
DE, DI, RE, H/F
VHYS
DE, DI, RE, H/F
Internal Pullup Resistance
Internal Pulldown Resistance
Output Leakage (Y and Z)
Full-Duplex
2
V
0.8
100
V
mV
Internal pullup RE
125
400
kΩ
RIN_DWN
Internal pulldown DE, H/F
125
400
kΩ
IO
DE = GND, VCC = GND or
5.5V
RIN_UP
Driver Short-Circuit Output Current
Threshold (Note 3)
IOSD
Driver Short-Circuit Foldback Output
Current (Note 3)
IOSDF
Thermal-Shutdown Threshold
TTS
Thermal-Shutdown Hysteresis
TTSH
Input Current (A and B)
IA, B
2
VCC / 2
RL = 100Ω or 54Ω, Figure 1, (Note 2)
Input-High Voltage
Input Hysteresis
V
No load
VIN = +12V
VIN = -7V
125
-100
0 ≤ VOUT ≤ 12V
40
250
-7 ≤ VOUT ≤ VCC
-250
-40
(VCC - 1V) ≤ VOUT ≤ 12V
20
-7V ≤ VOUT ≤ 1V
-20
0 ≤ VOUT ≤ 12V
DE = GND, VCC = GND or
5.5V
mA
mA
140
°C
15
°C
VIN = +12V
VIN = -7V
µA
125
-100
_______________________________________________________________________________________
µA
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
(VCC = +5V ±10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
-200
0
+200
mV
RECEIVER
Receiver Differential Threshold
Voltage
VTH
-7V ≤ VCM ≤ +12V, Figure 2
Receiver Input Hysteresis
VTH
VA + VB = 0, Figure 2
RO Output-High Voltage
VOH
IO = -1mA, Figure 2
RO Output-Low Voltage
VOL
IO = 1mA, Figure 2
Tri-State Output Current at Receiver
IOZR
0 ≤ VO ≤ VCC, Figure 2
-1
Receiver-Input Resistance
RIN
-7V ≤ VCM ≤ +12V, Figure 2
96
Receiver-Output Short-Circuit Current
IOSR
0 ≤ VRO ≤ VCC, Figure 2
-80
25
mV
VCC 0.6
V
0.4
+1
V
µA
kΩ
+80
mA
SUPPLY CURRENT
Supply Current
ICC
Shutdown Current
(MAX13182E/MAX13184E Only)
ISHDN
No load, RE = 0, DE = VCC
2
3
No load, RE = VCC, DE = VCC
2
3
No load, RE = 0V, DE = 0 or leave
unconnected
2
3
RE = VCC or leave unconnected,
DE = GND or leave unconnected
2.5
10
Human Body Model
±15
IEC 61000-4-2 Contact Discharge
±6
IEC 61000-4-2 Air-Gap Discharge
±12
mA
µA
ESD PROTECTION
ESD Protection for Y, Z, A and B
kV
DRIVER SWITCHING CHARACTERISTICS—MAX13181E/MAX13182E (SLEW-RATE LIMITED
TO 250kbps)
(VCC = +5V ±10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
tDPLH
CL = 50pF, RL = 54Ω, Figure 3
200
1000
tDPHL
CL = 50pF, RL = 54Ω, Figure 3
200
1000
Driver Differential Output Rise or
Fall Time
tDR, tDF
CL = 50pF, RL = 54Ω, Figure 3
400
1200
ns
Differential Driver Output Skew
(tDPLH - tDPHL)
tDSKEW
CL = 50pF, RL = 54Ω, Figure 3
140
ns
Driver Propagation Delay
Maximum Data Rate
250
ns
kbps
Driver Enable to Output High
tDZH
Figure 4a
2500
ns
Driver Enable to Output Low
tDZL
Figure 4b
2500
ns
Driver Disable Time from Low
tDLZ
Figure 4b
100
ns
Driver Disable Time from High
tDHZ
Figure 4a
100
ns
5500
ns
5500
ns
600
ns
Driver Enable from Shutdown to Output High
tDZH(SHDN)
(MAX13182E) Figure 4a
Driver Enable from Shutdown to Output Low
tDZL(SHDN)
(MAX13182E) Figure 4b
Time to Shutdown
tSHDN
(MAX13182E)
50
200
_______________________________________________________________________________________
3
MAX13181E–MAX13184E
DC ELECTRICAL CHARACTERISTICS (continued)
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
DRIVER SWITCHING CHARACTERISTICS—MAX13183E/MAX13184E (MAXIMUM DATA
RATE OF 16Mbps)
(VCC = +5V ±10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
tDPLH
CL = 50pF, RL = 54Ω, Figure 3
25
tDPHL
CL = 50pF, RL = 54Ω, Figure 3
25
Driver Differential Output Rise or Fall Time
tDR, tDF
CL = 50pF, RL = 54Ω, Figure 3
15
ns
Differential Driver Output Skew
(tDPLH - tDPHL)
tDSKEW
CL = 50pF, RL = 54Ω, Figure 3
8
ns
Driver Propagation Delay
Maximum Data Rate
16
ns
Mbps
Driver Enable to Output-High
tDZH
Figures 1 and 4a
50
ns
Driver Enable to Output-Low
tDZL
Figures 1 and 4b
50
ns
Driver Disable Time from Low
tDLZ
Figures 1 and 4b
50
ns
Driver Disable Time from High
tDHZ
Figures 1 and 4a
50
ns
Driver Enable from Shutdown to Output
High
tDZH (SHDN)
Figures 1 and 4a (MAX13184E)
2200
ns
Driver Enable from Shutdown to Output
Low
tDZL (SHDN)
Figures 1 and 4b (MAX13184E)
2200
ns
600
ns
Time to Shutdown
tSHDN
(MAX13184E)
50
200
RECEIVER SWITCHING CHARACTERISTICS
(VCC = +5V ±10%, TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew (tRPLH - tRPHL)
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
CL = 15pF, Figure 5
TYP
MAX
40
75
40
75
CL = 15pF, Figure 5
Maximum Data Rate
8
16
UNITS
ns
ns
Mbps
Receiver Enable to Output Low
tRZL
(MAX13182E/MAX13184E)
Figures 2 and 6
50
ns
Receiver Enable to Output High
tRZH
(MAX13182E/MAX13184E)
Figures 2 and 6
50
ns
Receiver Disable Time from Low
tRLZ
(MAX13182E/MAX13184E)
Figures 2 and 6
50
ns
Receiver Disable Time from High
tRHZ
(MAX13182E/MAX13184E)
Figures 2 and 6
50
ns
Receiver Enable from Shutdown to
Output High
tRZH (SHDN)
(MAX13182E/MAX13184E)
Figures 2 and 6
2200
ns
Receiver Enable from Shutdown to
Output Low
tRZL (SHDN)
(MAX13182E/MAX13184E)
Figures 2 and 6
2200
ns
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device ground,
unless otherwise noted. µDFN devices are production tested at +25°C. Overtemperature limits are guaranteed by design.
Note 2: ΔVOD and ΔVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
4
_______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
MAX13181E–MAX13184E
Y
RL
VOD
A (Y)
2
RO
B (Z)
VOH
VOL
CL
RL
2
CL
VOC
GND
Z
Figure 2. Receiver Differential Input
Figure 1. Driver Differential Output
3V
DI
1.5V
0
tDPLH
tDPHL
1/2 VO
Z
VO
Y
1/2 VO
VO
VDIFF 0
-VO
VDIFF = V (Y) - V (Z)
90%
10%
90%
10%
tDF
tDR
tDSKEW = | tDPLH - tDPHL
Figure 3. Driver Propagation Delay
S1
0 OR 3V
D
OUT
CL
50pF
GENERATOR
RL = 500Ω
50Ω
VCC
VCC / 2
DE
tDZH , tDZH(SHDN)
0
0.5V
OUT
VOH
VOM = (0 + VOH) / 2
0
tDHZ
Figure 4a. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
_______________________________________________________________________________________
5
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
VCC
RL = 500Ω
S1
0 OR 3V
D
OUT
CL
50pF
DE
GENERATOR
50Ω
VCC
VCC / 2
DE
tDZL , tDZL(SHDN)
0
tDLZ
VCC
VOH
VOM = (VOL + VCC) / 2
OUT
0.5V
VOL
Figure 4b. Driver Enable and Disable Times (tDLZ, tDZL, tDZL(SHDN))
A (Y)
+1V
B (Z)
-1V
tRPLH
VOH
RO
VOL
tRPHL
1.5V
tRSKEW = | tRPLH - tRPHL |
THE RISE TIME AND FALL TIME OF INPUTS A, B, Y AND Z < 4ns
Figure 5. Receiver Propagation Delay
6
_______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
MAX13181E–MAX13184E
S1
+1.5V
S3
5V
1kΩ
-1.5V
VID
R
CL
15pF
GENERATOR
S2
50Ω
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
5V
5V
1.5V
RE
RE
0
0
tRZH, tRZH(SHDN)
tRZL, tRZL(SHDN)
VOH
RO
VCC
VOH / 2
(VOL + VOH) / 2
RO
0
S1 OPEN
S2 CLOSED
S3 = +1.5V
VOL
S1 CLOSED
S2 OPEN
S3 = -1.5V
5
2.5V
2.5V
RE
tRHZ
5V
0
RE
0
tRLZ
5V
VOH
0.5V
RO
0
RO
0.5V
VOL
Figure 6. Receiver Disable Time
_______________________________________________________________________________________
7
Typical Operating Characteristics
(VCC = +5V, TA = 25°C, unless otherwise noted.)
OUTPUT CURRENT
vs. RECEIVER OUTPUT HIGH VOLTAGE
2
-15
10
35
60
85
12
0
0
1
2
3
4
0
5
1
2
3
4
5
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
DRIVER DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
4.8
4.6
4.4
4.2
4.0
IO = -1mA
0.4
0.3
0.2
0.1
0
-15
10
35
60
85
80
MAX13181E-4E toc06
5.0
RECEIVER OUTPUT LOW VOLTAGE (V)
5.2
0.5
DRIVER DIFFERENTIAL OUTPUT CURRENT (mA)
RECEIVER OUTPUT LOW VOLTAGE (V)
MAX13181E-4E toc05
RECEIVER OUTPUT HIGH VOLTAGE (V)
MAX13181E-4E toc04
TEMPERATURE (°C)
IO = -1mA
-40
18
6
0
-40
60
40
20
0
-40
-15
10
35
60
85
0
1
2
3
4
5
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT HIGH VOLTAGE
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT LOW VOLTAGE
4
3
2
1
80
60
40
20
120
MAX13181E-4E toc09
RL = 54Ω
OUTPUT CURRENT (mA)
5
MAX13181E-4E toc07
TEMPERATURE (°C)
100
OUTPUT CURRENT (mA)
RECEIVER OUTPUT HIGH VOLTAGE (V)
8
24
4
0
80
60
40
20
0
0
0
-40
-15
10
35
TEMPERATURE (°C)
8
12
30
MAX13181E-4E toc03
16
1
5.4
MAX13181E-4E toc02
20
OUTPUT CURRENT (mA)
3
OUTPUT CURRENT
vs. RECEIVER OUTPUT LOW VOLTAGE
MAX13181E-4E toc08
SUPPLY CURRENT (mA)
4
NO LOAD
RE = VCC
DE = VCC
OUTPUT CURRENT (mA)
5
MAX13181E-4E toc01
SUPPLY CURRENT
vs. TEMPERATURE
DRIVER DIFFERENTIAL OTUPUT VOLTAGE (V)
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
60
85
-8
-6
-4
-2
0
2
4
TRANSMITTER OUTPUT HIGH VOLTAGE (V)
6
0
2
4
6
8
10
TRANSMITTER OUTPUT LOW VOLTAGE (V)
_______________________________________________________________________________________
12
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (250kbps) (MAX13182E)
6
4
2
600
tDPHL
500
400
tPDLH
300
200
-40
-15
10
35
60
-15
RECEIVER PROPAGATION DELAY (ns)
40
tRPLH
30
20
tRPHL
10
tDPHL
20
tPDLH
10
10
35
60
85
-40
-15
10
35
60
TEMPERATURE (°C)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps) (MAX13184E)
RECEIVER PROPAGATION DELAY
(250kbps) (MAX13182E)
50
MAX13181E-4E toc13
RECEIVER PROPAGATION DELAY (ns)
CL = 15pF
30
TEMPERATURE (°C)
TEMPERATURE (°C)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (250kbps) (MAX13182E)
40
0
-40
85
CL = 50pF
RL = 54Ω
85
MAX13181E-4E toc15
MAX13181E-4E toc14
0
50
50
MAX13181E-4E toc12
DRIVER PROPAGATION DELAY (ns)
8
CL = 50pF
RL = 54Ω
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps) (MAX13184E)
DRIVER PROPAGATION DELAY (ns)
700
MAX13181E-4E toc10
SHUTDOWN CURRENT (μA)
10
MAX13181E-4E toc11
SHUTDOWN CURRENT
vs. TEMPERATURE
CL = 15pF
40
CL = 15pF
MAX13181E–MAX13184E
Typical Operating Characteristics (continued)
(VCC = +5V, TA = 25°C, unless otherwise noted.)
VA - V B
2V/div
tRPLH
30
20
RO
2V/div
tRPHL
10
0
0
-40
-15
10
35
60
-40
85
-15
10
35
60
TEMPERATURE (°C)
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY
(250kbps) (MAX13182E)
RECEIVER PROPAGATION DELAY
(16Mbps) (MAX13184E)
DRIVER PROPAGATION DELAY
(16Mbps) (MAX13184E)
MAX13181E-4E toc18
MAX13181E-4E toc17
MAX13181E-4E toc16
CL = 50pF
RL = 54Ω
CL = 15pF
CL = 50pF
RL = 54Ω
DI
2V/div
DI
2V/div
VA - V B
2V/div
RO
2V/div
VY - V Z
2V/div
400ns/div
400ns/div
85
10ns/div
VY - V Z
2V/div
10ns/div
_______________________________________________________________________________________
9
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
Functional Tables
MAX13181E/MAX13183E
MAX13182E/MAX13184E
TRANSMITTING
TRANSMITTING
INPUT
INPUT
OUTPUT
OUTPUT
RE
DE
DI
Z
Y
DE
DI
Z
Y
X
1
0
1
0
1
0
1
0
X
1
1
0
1
1
1
0
1
High
impedance
High
impedance
X
High
impedance
High
impedance
0
0
X
1
0
X
0
RECEIVING
Shutdown
(high impedance)
INPUT
RECEIVING
H/F
DE
OUTPUT
OUTPUT
A-B
Y-Z
RO
1
0
X
≥ 200mV
X
RE
DE
A-B
RO
0
X
≤ -200mV
X
0
0
X
≥ 200mV
1
1
0
X
≥ 200mV
1
0
X
≤ -200mV
0
1
0
X
≤ -200mV
0
1
1
X
High impedance
1
0
X
Shutdown
(high impedance)
INPUT
X = Don’t care.
Functional Diagram
VCC
MAX13182E
MAX13184E
RO
R
MAX13181E
MAX13183E
VCC
A
A
RO
B
VCC
RIN_UP
B
RE
H/F
RIN_DWN
DE
Y
RIN_DWN
DI
Z
DI
D
Y
GND
10
Z
DE
RIN_DWN
GND
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
MAX13181E/
MAX13183E
MAX13182E/
MAX13184E
MAX13182E/
MAX13184E
NAME
FUNCTION
SO
µDFN
1
1
14
VCC
Positive Supply, VCC = +4.5V to +5.5V. Bypass VCC with a 0.1µF ceramic
capacitor to ground.
2
2
2
RO
Receiver Output. When RE is low and (A-B) ≥ 200mV, RO is high; if (A-B) ≤
-200mV, RO is low.
—
3
3
RE
Receiver Output Enable. Drive RE low to enable RO. Drive RE high to
disable the receiver. RE input has an internal pullup resistor.
3
—
—
H/F
Half-/Full-Duplex Selector Input. Connect H/F to VCC for half-duplex mode.
Leave H/F unconnected or connect H/F to GND for full-duplex mode. H/F
input has an internal pulldown resistor.
4
4
4
DE
Driver Output Enable. Drive DE high to enable the driver. Driver output is high
impedance when DE is low. DE input has an internal pulldown resistor.
5
5
5
DI
Driver Input. With DE high, a low on DI forces noninverting output low and
inverting output high. Similarly, a high on DI forces noninverting output high
and inverting output low.
6
6
6, 7
GND
7
7
9
Y
8
8
10
Z
Inverting Driver Output. (Also inverting receiver input in half-duplex mode.)
9
9
11
B
Inverting Receiver Input
10
10
12
A
Noninverting Receiver Input
—
—
1, 8, 13
N.C.
Ground
Noninverting Driver Output. (Also noninverting receiver input in half-duplex
mode.)
No Connection. N.C. is not internally connected.
Detailed Description
The MAX13181E–MAX13184E high-speed transceivers
for RS-485 communication contain one driver and one
receiver. These devices feature 1/8 unit-load input
impedance that allows up to 256 receivers on the bus.
All devices feature integrated pullup/pulldown resistors
on the DE, RE, and H/F inputs to reduce external components. The MAX13182E/MAX13184E feature a lowcurrent shutdown mode for power-sensitive applications.
The MAX13181E/MAX13182E feature reduced slew-rate
drivers to minimize EMI and reflections that are caused
by improperly terminated cables. The slew-rate limited
MAX13181E/MAX13182E allow error-free transmission
up to 250Kbps. The MAX13183E/MAX13184E feature
full-speed drivers allowing data rate of up to 16Mbps.
The MAX13182E/MAX13184E are configured for fullduplex operation. The MAX13181E/MAX13183E feature
selectable half- or full-duplex operation by driving H/F
input high or low, respectively. All devices operate from
a single +5.0V supply.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electrostatic discharges encountered during handling and
assembly. The driver outputs of the MAX13181E–
MAX13184E family have extra protection against static
electricity. Maxim’s engineers have developed state-ofthe-art structures to protect these driver outputs against
ESD of ±15kV with VCC = 5V, and regardless of the
logic state of DE and DI.
The ESD-protected pins are tested with reference to the
ground pin in a powered-down condition. They are tested to ±15kV using the Human Body Model, ±12kV using
the IEC 61000-4-2 Air-Gap Discharge Model, and to
±6kV using the IEC 61000-4-2 Contact Discharge Model.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
______________________________________________________________________________________
11
MAX13181E–MAX13184E
Pin Description
RC
1MΩ
CHARGE-CURRENTLIMIT RESISTOR
RD
1500Ω
IP 100%
90%
DISCHARGE
RESISTANCE
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPS
HIGHVOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
36.8%
10%
0
0
Figure 7a. Human Body ESD Test Model
RC
50MΩ TO 100MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
150pF
tDL
CURRENT WAVEFORM
Figure 7b. Human Body Current Waveform
RD
330Ω
I
100%
90%
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
TIME
tRL
IPEAK
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
DEVICE
UNDER
TEST
10%
tr = 0.7ns TO 1ns
t
30ns
60ns
Figure 7c. IEC 61000-4-2 ESD Test Model
Human Body Model
Figure 7a shows the Human Body Model, and Figure 7b
shows the current waveform it generates when discharged
into a low impedance. This model consists of a 100pF
capacitor charged to the ESD voltage of interest, which is
then discharged into the test device through a 1.5kΩ resistor.
Machine Model
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
not specifically refer to integrated circuits. The
MAX13485E/MAX13486E help equipment designs to
meet IEC 61000-4-2, without the need for additional
ESD protection components.
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD withstand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body
Model. Figure 7c shows the IEC 61000-4-2 model, and
Figure 7d shows the current waveform for the IEC
61000-4-2 ESD Contact Discharge test.
12
Figure 7d. IEC 61000-4-2 ESD Generator Current Waveform
Applications Information
256 Transceiver on the Bus
The standard RS-485 receiver input impedance is 12kΩ
(one-unit load), and the standard driver can drive up to 32
unit loads. The MAX13181E–MAX13184E family transceivers have a 1/8-unit load receiver input impedance
(96kΩ), allowing up to 256 transceivers to be connected
in parallel on one communication line. Any combination of
these devices and/or other RS-485 transceivers with a
total of 32 unit loads or less can be connected to the line.
Reduced EMI and Reflections
The MAX13181E/MAX13182E are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. This slew-rate limited feature
allows error-free data transmission up to 250kbps.
MAX13181E/MAX13183E Low-Power
Shutdown Mode
The MAX13181E/MAX13183E feature low power shutdown mode. Low-power shutdown mode is initiated by
bringing RE high and DE low. In shutdown, the devices
typically draw only 2.5µA (typ) of supply current. RE
and DE can be driven simultaneously. If RE is high and
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
A
Enable times tZH and tZL (see the Switching Characteristics) assume the devices are not in a low-power shutdown state. Enable times t ZH(SHDN) and t ZL(SHDN)
assume the devices are in a shutdown state. It takes drivers and receivers longer to become enabled from lowpower shutdown mode (tZH(SHDN), tZL(SHDN)) than from
driver-/receiver-disable mode (tZH, tZL).
RO
*RE
R
DE
Z
DI
D
DATA OUT
Y 120Ω
(H/F)
Line Length
The RS-485 standard covers line lengths up to 4000ft.
For line lengths greater than 4000ft, use the repeater
application shown in Figure 8.
DATA IN
B 120Ω
*RE FOR MAX13182E/MAX13184E
(H/F for MAX13181E/
MAX13183E ONLY)
(FULL DUPLEX)
Figure 8. Line Repeater for MAX13181E–MAX13184E
Typical Applications
The MAX13181E–MAX13184E transceivers are designed
for bidirectional data communications on multipoint bus
transmission lines. The MAX13181E/MAX13183E can be
used in either half-duplex or full-duplex configuration.
The MAX13182E/MAX13184E are for full-duplex only.
Figure 9 shows the typical network application circuit for
half-duplex, and Figures 10 and 11 show typical network
application circuits for full duplex.
To minimize reflections, terminate the line at both ends in
its characteristics impedance, and keep stub lengths off
the main line as short as possible. The slew-rate-limited
MAX13181E/MAX13182E are more tolerant of imperfect
termination.
120Ω
120Ω
DI
DE
B
B
D
D
DI
DE
VCC
A
RO
B
A
B
A
A
R
R
RO
RE
H/F
R
R
D
D
MAX13181E–MAX13184E
CONFIGURED FOR HALFDUPLEX OPERATION
DI
DE
RO RE
DI
DE
RO RE
Figure 9. Typical Half-Duplex RS-485 Network
______________________________________________________________________________________
13
MAX13181E–MAX13184E
DE is low for 200ns (typ), the devices are guaranteed to
enter shutdown.
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
A
R
RO
Y
120Ω
120Ω
D
B
DI
Z
DE
Z
DI
120Ω
120Ω
D
DE
RE
RO
B
R
Y
H/F
A
Y
MAX13181E/MAX13183E
CONFIGURED FOR FULLDUPLEX OPERATION
Z
B
A
Y
Z
B
R
A
R
D
D
DI
DI
DE RE RO
DE RE RO
Figure 10. Typical Full-Duplex RS-485 Network
A
R
RO
Y
120Ω
120Ω
Z
D
B
120Ω
120Ω
R
Y
A
Y
MAX13182E/MAX13184E
CONFIGURED FOR FULLDUPLEX OPERATION
Z
B
A
Y
Z
R
D
DI
B
A
R
D
DE RE RO
DI
DE RE RO
Figure 11. Typical Full-Duplex RS-485 Network
14
DI
Z
DE
DI
D
B
______________________________________________________________________________________
DE
RE
RO
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
TEMP RANGE
PIN-PACKAGE
TOP MARK
PKG CODE
MAX13183EELB+
PART
-40°C to +85°C
10 µDFN
ABA
L1022-1
MAX13184EELB+
-40°C to +85°C
10 µDFN
ABB
L1022-1
MAX13184EESD+
-40°C to +85°C
14 SO
—
S14-1
+Denotes a lead-free package.
Pin Configurations (continued)
Chip Information
PROCESS: BiCMOS
TOP VIEW
N.C. 1
+
14 VCC
RO 2
RE 3
DE 4
13 N.C.
MAX13182E
MAX13184E
12 A
11 B
DI 5
10 Z
GND 6
9 Y
GND 7
8 N.C.
SO
______________________________________________________________________________________
15
MAX13181E–MAX13184E
Ordering Information (continued)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
A
D
XXXX
XXXX
XXXX
b
e
N
SOLDER
MASK
COVERAGE
E
PIN 1
0.10x45∞
L
PIN 1
INDEX AREA
6, 8, 10L UDFN.EPS
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
L1
1
SAMPLE
MARKING
A
A
(N/2 -1) x e)
7
CL
CL
b
L
A
A2
A1
L
e
EVEN TERMINAL
e
ODD TERMINAL
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
16
21-0164
______________________________________________________________________________________
A
1
2
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
COMMON DIMENSIONS
SYMBOL
MIN.
NOM.
A
0.70
0.75
0.80
A1
0.15
0.20
0.25
0.035
A2
0.020
0.025
D
1.95
2.00
E
1.95
2.00
L
0.30
0.40
L1
MAX.
-
2.05
2.05
0.50
0.10 REF.
PACKAGE VARIATIONS
PKG. CODE
N
e
b
(N/2 -1) x e
L622-1
6
0.65 BSC
0.30±0.05
1.30 REF.
L822-1
8
0.50 BSC
0.25±0.05
1.50 REF.
L1022-1
10
0.40 BSC
0.20±0.03
1.60 REF.
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
21-0164
A
2
2
______________________________________________________________________________________
17
MAX13181E–MAX13184E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in µDFN
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
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.
18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
SPRINGER
is a registered trademark of Maxim Integrated Products, Inc.
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