SP3070E - SP3078E Family
Data Sheet
±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe
RS-485/RS-422 Transceivers
General Description
Features
The SP3070E - SP3078E differential line transceivers are
suitable for bidirectional communication on balanced
multi-point bus transmission lines and comply with both
RS-485 and RS-422 EIA Standards. Each device consists
of a differential driver and differential receiver. All devices
operate from a 3.3V power supply.
■
■
■
±15kV ESD protection for RS-485 pins
■
■
■
■
■
Up to 256 transceivers may share Bus
High receiver input impedance allows a large number of
transceivers to share a common data bus while
maintaining signal margin and without excessive loading
or use of expensive repeaters. The high impedance driver
output is maintained over the entire common-mode
voltage range from -7 to +12V. Receivers will failsafe to
logic 1 output when inputs are open, shorted or
terminated. Drivers include built-in short-circuit protection
and a thermal-overload shutdown to protect against
excessive power dissipation from bus contention or cable
faults. All RS-485 receiver inputs and driver outputs are
ESD protected up to ±15kV (Air-Gap and Human Body
Model) and up to ±8kV Contact Discharge (IEC 61000-42). The SP3070E - SP3078E devices may not achieve
optimal transmit performance if the connected receiver
includes a biasing network to 5.0V without a termination
resistor. Please see MaxLinear Application Note ANI#21
for further details.
Applications
■
■
■
3.3V low-power operation
Advanced receiver-failsafe protection for open, shorted
or terminated lines
Very low load for 8x greater fanout
Hot Swap glitch protection RE and DE
Thermal shutdown protects against driver contention
Available in three industry standard footprints
SP3070E, SP3073E and SP3076E in Full-Duplex
(14-pin)
SP3071E, SP3074E and SP3077E in Full-Duplex
(8-pin)
SP3072E, SP3075E and SP3078E in Half-Duplex
(8-pin)
Three applications-optimized speed grades
SP3070E - SP3072E: 250kbps slew-limited
SP3073E - SP3075E: 500kbps slew-limited
SP3076E - SP3078E: 16Mbps high speed
Small form factor NSOIC packages
Industrial (-40 to 85°C) and Extended (-40 to 125°C)
temperature grades
Ordering Information - page 19
Industrial Control, Utility Meters, Building Automation,
Instrumentation, Point of Sale
RO
1
RE
2
DE
3
DI
4
8 PIN NSOIC
SP3072E
SP3075E
SP3078E
Half Duplex
8
Vcc
Vcc
1
7
B
RO
2
6
A
DI
3
5
GND
GND
4
8 PIN NSOIC
SP3071E
SP3074E
SP3077E
Full Duplex
Figure 1: Pinouts
• www.maxlinear.com• Rev 1.0.3
8
A
7
B
6
Z
5
Y
NC
1
RO
2
RE
3
DE
4
DI
5
GND
6
GND
7
14 Vcc
14 PIN NSOIC
SP3070E
SP3073E
SP3076E
Full Duplex
13 NC
12 A
11 B
10
Z
9
Y
8
NC
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Revision History
Revision History
Document No.
Release Date
Change Description
-
Legacy Sipex Datasheet.
1.0.0
06/10/09
Convert to Exar format, update ordering information, correct subscript on pages 5-7 and
change revision to 1.0.0.
1.0.1
09/30/10
Correct type error on page 7 on driver switching characteristics table. Change
SP3076E,3077E and 3078E Receiver enable time from shutdown from 1800ns to 3000ns.
1.0.2
12/02/10
Add reference to Application Note ANI#21 and change ESD protection levels to
IEC 61000-4-2.
1.0.3
2/24/20
Update to MaxLinear format, update Ordering Information. Move ESD Protection to page 2.
Corrected 14-pin block diagram (pin 3).
2/24/20
Rev 1.0.3
ii
SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet
Table of Contents
Table of Contents
General Description............................................................................................................................................. i
Features............................................................................................................................................................... i
Applications ......................................................................................................................................................... i
Device Architecture and Block Diagrams ........................................................................................................ 1
14-pin Full Duplex ........................................................................................................................................................ 1
8-pin Full Duplex .......................................................................................................................................................... 1
8-pin Half Duplex .......................................................................................................................................................... 1
Specifications ..................................................................................................................................................... 2
Absolute Maximum Ratings...........................................................................................................................................2
ESD Ratings ..................................................................................................................................................................2
Electrical Characteristics ...............................................................................................................................................3
Driver Switching Characteristics - SP3070E, SP3071E & SP3072E.............................................................................5
Receiver Switching Characteristics - SP3070E, SP3071E & SP3072E ........................................................................5
Driver Switching Characteristics - SP3073E, SP3074E & SP3075E.............................................................................6
Receiver Switching Characteristics - SP3073E, SP3074E & SP3075E ........................................................................6
Driver Switching Characteristics - SP3076E, SP3077E & SP3078E.............................................................................7
Receiver Switching Characteristics - SP3076E, SP3077E & SP3078E ........................................................................7
Test Circuits and Timing Diagrams................................................................................................................... 8
Function Tables ................................................................................................................................................ 12
Pin Information ................................................................................................................................................. 13
Pin Configurations .......................................................................................................................................................13
Pin Descriptions ..........................................................................................................................................................13
Detailed Description ......................................................................................................................................... 14
Receiver Input Filtering .............................................................................................................................................. 14
Fail Safe ..................................................................................................................................................................... 14
Hot-Swap Capability .................................................................................................................................................... 14
15kV ESD Protection...................................................................................................................................................14
ESD Test Conditions .................................................................................................................................................. 15
IEC 61000-4-2 ............................................................................................................................................................ 15
Machine Model ........................................................................................................................................................... 15
256 Transceivers on the Bus...................................................................................................................................... 15
Reduced EMI and Reflections .................................................................................................................................... 15
Low Power Shutdown Mode....................................................................................................................................... 15
Driver Output Protection ............................................................................................................................................. 15
2/24/20
Rev 1.0.3
iii
SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet
Table of Contents
Line Length................................................................................................................................................................. 15
Typical Applications.................................................................................................................................................... 15
Parts Selector Guide ........................................................................................................................................ 16
Mechanical Dimensions ................................................................................................................................... 17
NSOIC8 ....................................................................................................................................................................... 17
NSOIC14 ..................................................................................................................................................................... 18
Ordering Information........................................................................................................................................ 19
2/24/20
Rev 1.0.3
iv
SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet
List of Figures
List of Figures
Figure 1: Pinouts.................................................................................................................................................... i
Figure 2: 14-pin Full Duplex.................................................................................................................................. 1
Figure 3: 8-pin Full Duplex.................................................................................................................................... 1
Figure 4: 8-pin Half Duplex ................................................................................................................................... 1
Figure 5: Driver DC Test Circuit............................................................................................................................ 8
Figure 6: Receiver DC Test Circuit ....................................................................................................................... 8
Figure 7: Driver Propagation Delay Time Test Circuit and Timing Diagram......................................................... 8
Figure 8: Driver Enable and Disable Times Test Circuit and Timing Diagram ..................................................... 9
Figure 9: Driver Contention Test........................................................................................................................... 9
Figure 10: Driver Enable and Disable Times Test Circuit and Timing Diagram ................................................. 10
Figure 11: Receiver Propagation Delay Test Circuit and Timing Diagram ......................................................... 10
Figure 12: Receiver Enable and Disable Times Test Circuit .............................................................................. 11
Figure 13: Receiver Enable and Disable Timing Diagram.................................................................................. 11
Figure 14: Pin Configurations ............................................................................................................................. 13
Figure 15: Mechanical Dimension, NSOIC8 ....................................................................................................... 17
Figure 16: Mechanical Dimensions, NSOIC14 ................................................................................................... 18
2/24/20
Rev 1.0.3
v
SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet
List of Tables
List of Tables
Table 1: Absolute Maximum Ratings .................................................................................................................... 2
Table 2: ESD Ratings ........................................................................................................................................... 2
Table 3: Electrical Characteristics ........................................................................................................................ 3
Table 4: SP3070E, SP3071E & SP3072E Driver Switching Characteristics ........................................................ 5
Table 5: SP3070E, SP3071E & SP3072E Receiver Switching Characteristics ................................................... 5
Table 6: SP3073E, SP3074E & SP3075E Driver Switching Characteristics ........................................................ 6
Table 7: SP3073E, SP3074E & SP3075E Receiver Switching Characteristics ................................................... 6
Table 8: SP3076E, SP3077E & SP3078E Driver Switching Characteristics ........................................................ 7
Table 9: SP3076E, SP3077E & SP3078E Receiver Switching Characteristics ................................................... 7
Table 10: SP3070E, SP3073E, SP3076E (Full Duplex)..................................................................................... 12
Table 11: SP3070E, SP3073E, SP3076E (Full Duplex)..................................................................................... 12
Table 12: SP3071E, SP3074E, SP3077E (Full Duplex)..................................................................................... 12
Table 13: SP3071E, SP3074E, SP3077E (Full Duplex)..................................................................................... 12
Table 14: SP3072E, SP3075E, SP3078E (Half Duplex) .................................................................................... 12
Table 15: SP3072E, SP3075E, SP3078E (Half Duplex) .................................................................................... 12
Table 16: Pin Descriptions.................................................................................................................................. 13
Table 17: Parts Selector Guide........................................................................................................................... 16
Table 18: Ordering Information........................................................................................................................... 19
2/24/20
Rev 1.0.3
vi
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Device Architecture and Block Diagrams
Device Architecture and Block Diagrams
Devices are available in three industry standard architectures and footprints. In each footprint, there are three speed
grades available.
NC
2
R
14
13
12
11
1
R
RE 3
4
DE
10
D 5
6
GND
7
GND
D
9
8
Vcc
NC
A
B
Z
Y
NC
14-pin Full Duplex:
SP3070E, 250kbps slew limited
SP3073E, 500kbps slew limited
SP3076E, 16Mbps
Figure 2: 14-pin Full Duplex
Vcc
R
D
GND
1
2
8 A
7
B
R
6
3
D
4
Z
5 Y
8-pin Full Duplex:
SP3071E, 250kbps slew limited
SP3074E, 500kbps slew limited
SP3077E, 16Mbps
Figure 3: 8-pin Full Duplex
RO
1
2
RE
DE 3
DI
4
R
D
8 VCC
7 B
6 A
5
GND
8-pin Half Duplex:
SP3072E, 250kbps slew limited
SP3075E, 500kbps slew limited
SP3078E, 16Mbps
Figure 4: 8-pin Half Duplex
2/24/20
Rev 1.0.3
1
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Specifications
Specifications
Absolute Maximum Ratings
Important: These are stress ratings only and functional operation of the device at these ratings or any other above those
indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating
conditions for extended periods of time may affect reliability.
Table 1: Absolute Maximum Ratings
Parameter
Minimum
VCC
Maximum
Units
6.0
V
Input voltage at control input pins (RE, DE)
-0.3
6.0
V
Driver input voltage (RE, DE)
-0.3
6.0
V
Driver output voltage (A, B, Y & Z)
-8
13
V
Receiver input voltage (A, B)
-8
13
V
8-pin NSOIC (derate 5.88mW/°C above 70°C)
471
mW
14-pin NSOIC (derate 8.33mW/°C above 70°C)
667
mW
Continuous Power Dissipation at TA = 70°C
Operating Temperature Ranges
SP307xE_MN
-40
125
°C
SP307xE_EN
-40
85
°C
150
°C
150
°C
300
°C
Limit
Units
Junction temperature
Storage temperature range
-65
Lead temperature (soldering, 10s)
ESD Ratings
Table 2: ESD Ratings
Parameter
HBM - Human Body Model (pins Y, Z, A & B)
±15
kV
IEC 1000-4-2 Airgap Discharge (pins Y, Z, A & B)
±15
kV
IEC 1000-4-2 Contact Discharge (pins Y, Z, A & B)
±8
kV
2/24/20
Rev 1.0.3
2
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Electrical Characteristics
Electrical Characteristics
Unless otherwise noted, VCC = 3.3V ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C. The "•" denotes the specifications which apply over the full operating range unless
otherwise noted.
Table 3: Electrical Characteristics
Parameter
Differential driver output
Symbol
VOD
Test Condition
Minimum
Typical
Maximum
RL = 100 (RS-422), Figure 5
2
VCC
RL = 54 (RS-485), Figure 5
1.5
VCC
Units
V
No load
•
VCC
0.2
V
3
V
±0.2
V
Change in magnitude of differential
output voltage
VOD
RL = 54 or 100, Figure 5
•
Driver common mode output voltage
VOC
RL = 54 or 100, Figure 5
•
Change in magnitude of common
mode output voltage
| VOC |
RL = 54 or 100, Figure 5
Input high voltage
VIH
DE, DI, RE
Input low voltage
VIL
DE, DI, RE
Input hysteresis
VHYS
DE, DI, RE
•
Input current
IIN
DE, DI, RE
•
-1
1
µA
DE, RE
First transition will draw more
current (hot swap)
•
1
10
kΩ
Input impedance first transition
(hot swap)
•
VCC/2
2
V
0.8
VIN = 12V
•
VIN = -7V
•
100
V
mV
125
Output leakage (Y and Z)
Full duplex (A and B)
IO
DE = GND
VCC = GND or 3.6V
Driver short-circuit current
IOSD
-7V ≤ VOUT ≤ 12V, (Figure 9)
Input current (A and B) half duplex
IA,B
DE = GND
VCC = GND or 3.6V
Thermal-shutdown threshold
TTS
•
165
°C
Thermal-shutdown hysteresis
TTSH
•
15
°C
VIN = 12V
•
VIN = -7V
•
-100
0
±250
-250
0
125
-100
µA
mA
µA
Receiver
Receiver differential threshold
(sensitivity)
VTH
-7V ≤ VCM ≤ 12V
Receiver input hysteresis
VTH
Va + Vb = 0V
•
RO output high voltage
VOH
IO = -1mA
•
RO output low voltage
VOL
IO = 1mA
•
0.4
V
Tri-State output current at receiver
IOZR
0 ≤ VO ≤ VCC
•
±1
µA
Receiver input resistance
RIN
-7V ≤ VCM ≤ 12V
•
Receiver output short-circuit current
IOZR
0V ≤ VRO ≤ VCC
2/24/20
Rev 1.0.3
-200
-125
-50
15
mV
mV
VCC - 0.6
V
96
kΩ
±60
mA
3
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Electrical Characteristics
Table 3: Electrical Characteristics
Parameter
Symbol
Test Condition
Minimum
Typical
Maximum
Units
Supply Current
Supply current
Supply current in shutdown mode
2/24/20
ICC
ISHDN
No load, RE = 0, DE = VCC
•
0.8
1.5
No load, RE = VCC, DE = VCC
•
0.8
1.5
No load, RE = 0, DE = 0
•
0.8
1.5
0.05
3
RE = VCC, DE = GND
Rev 1.0.3
mA
µA
4
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Switching Characteristics
Driver Switching Characteristics - SP3070E, SP3071E & SP3072E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 4: SP3070E, SP3071E & SP3072E Driver Switching Characteristics
Driver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Driver propagation delay (tPHL, tPLH)
Driver output rise / fall time (tR, tF)
Driver differential skew (tPLH - tPHL)
Minimum
RL = 54Ω, CL = 50pF,
Figure 6 & Figure 7
Typical
250
Driver disable from output high (tHZ)
Unit
kbps
250
1500
ns
350
1600
ns
200
ns
2500
ns
2500
ns
100
ns
100
ns
Driver enable to output high (tZH)
Driver enable to output low (tZL)
Maximum
RL = 500Ω, CL = 50pF,
Figure 8 & Figure 10
Driver disable from output low (tLZ)
Driver enable from shutdown to output high
(tZH(SHDN))
Figure 8
5500
ns
Driver enable from shutdown to output low
(tZL(SHDN))
Figure 10
5500
ns
600
ns
Time to shutdown (tSHDN)
50
200
Receiver Switching Characteristics - SP3070E, SP3071E & SP3072E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 5: SP3070E, SP3071E & SP3072E Receiver Switching Characteristics
Receiver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Minimum
Receiver propagation delay (tPHL, tPLH)
200
ns
Propagation delay skew (tPLH - tPHL)
CL = 15pF, Figure 11 &
Figure 12
30
ns
Receiver enable to output high (tZH)
Figure 13
50
ns
Receiver enable to output low (tZL)
Figure 13
50
ns
Receiver disable from output high (tHZ)
Figure 13
100
ns
Receiver disable from output low (tLZ)
Figure 13
200
ns
Receiver enable from shutdown to output high
Figure 13
4000
ns
Receiver enable from shutdown to output low
Figure 13
4000
ns
600
ns
Time to shutdown (tSHDN)
2/24/20
50
Rev 1.0.3
Typical
Maximum
250
Unit
kbps
200
5
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Switching Characteristics
Driver Switching Characteristics - SP3073E, SP3074E & SP3075E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 6: SP3073E, SP3074E & SP3075E Driver Switching Characteristics
Driver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Driver propagation delay (tPHL, tPLH)
Driver output rise / fall time (tR, tF)
Driver differential skew (tPLH - tPHL)
Minimum
RL = 54Ω, CL = 50pF,
Figure 6 & Figure 7
Typical
500
Driver disable from output high (tHZ)
Unit
kbps
180
800
ns
200
800
ns
100
ns
2500
ns
2500
ns
100
ns
100
ns
Driver enable to output high (tZH)
Driver enable to output low (tZL)
Maximum
RL = 500Ω, CL = 50pF,
Figure 8 & Figure 10
Driver disable from output low (tLZ)
Driver enable from shutdown to output high
(tZH(SHDN))
Figure 8
4500
ns
Driver enable from shutdown to output low
(tZL(SHDN))
Figure 10
4500
ns
600
ns
Time to shutdown (tSHDN)
50
200
Receiver Switching Characteristics - SP3073E, SP3074E & SP3075E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 7: SP3073E, SP3074E & SP3075E Receiver Switching Characteristics
Receiver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Minimum
Receiver propagation delay (tPHL, tPLH)
200
ns
Propagation delay skew (tPLH - tPHL)
CL = 15pF, Figure 11 &
Figure 12
30
ns
Receiver enable to output high (tZH)
Figure 13
50
ns
Receiver enable to output low (tZL)
Figure 13
50
ns
Receiver disable from output high (tHZ)
Figure 13
50
ns
Receiver disable from output low (tLZ)
Figure 13
50
ns
Receiver enable from shutdown to output high
Figure 13
4000
ns
Receiver enable from shutdown to output low
Figure 13
4000
ns
600
ns
Time to shutdown (tSHDN)
2/24/20
50
Rev 1.0.3
Typical
Maximum
500
Unit
kbps
200
6
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Switching Characteristics
Driver Switching Characteristics - SP3076E, SP3077E & SP3078E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 8: SP3076E, SP3077E & SP3078E Driver Switching Characteristics
Driver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Driver propagation delay (tPHL, tPLH)
Driver output rise / fall time (tR, tF)
Driver differential skew (tPLH - tPHL)
Minimum
Typical
16
Driver disable from output high (tHZ)
Unit
Mbps
RL = 54Ω, CL = 50pF,
Figure 6 & Figure 8
Driver enable to output high (tZH)
Driver enable to output low (tZL)
Maximum
RL = 500Ω, CL = 50pF,
Figure 8 & Figure 10
Driver disable from output low (tLZ)
50
ns
15
ns
8
ns
150
ns
150
ns
100
ns
100
ns
Driver enable from shutdown to output high
(tZH(SHDN))
Figure 8
1800
ns
Driver enable from shutdown to output low
(tZL(SHDN))
Figure 10
1800
ns
600
ns
Time to shutdown (tSHDN)
50
200
Receiver Switching Characteristics - SP3076E, SP3077E & SP3078E
Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V,
ambient temperature TA = 25°C.
Table 9: SP3076E, SP3077E & SP3078E Receiver Switching Characteristics
Receiver Characteristic
Conditions
Data signaling rate
Duty cycle 40 to 60%
Minimum
Receiver propagation delay (tPHL, tPLH)
Propagation delay skew (tPLH - tPHL)
CL = 15pF, Figure 11 &
Figure 12, -40 to 85°C
Receiver enable to output high (tZH)
Typical
Maximum
16
Unit
Mbps
75
ns
8
ns
Figure 13
60
ns
Receiver enable to output low (tZL)
Figure 13
60
ns
Receiver disable from output high (tHZ)
Figure 13
50
ns
Receiver disable from output low (tLZ)
Figure 13
50
ns
Receiver enable from shutdown to output high
Figure 13
3000
ns
Receiver enable from shutdown to output low
Figure 13
3000
ns
600
ns
Time to shutdown (tSHDN)
2/24/20
40
50
Rev 1.0.3
200
7
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Test Circuits and Timing Diagrams
Test Circuits and Timing Diagrams
A
R/2
DI
V ID
VOD
D
0 or 3V
R/2
VOC
VCC
RE
Figure 5: Driver DC Test Circuit
Figure 6: Receiver DC Test Circuit
RL
54
Y
DI
OUT
R
B
CL
50pF
V OD
D
Z
3.3V
V CC
DI
0
Z
Y
V CC /2
V DIFF
-V O
tPHL
VO
1/2 V
VO
tPLH
10%
tR
O
1/2 V
V DIFF = V(Y) - V(Z)
90%
90%
V SKEW
= t PLH - tPHL
O
10%
tF
Figure 7: Driver Propagation Delay Time Test Circuit and Timing Diagram
2/24/20
Rev 1.0.3
8
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Y
0 or V CC
DI
DE
S1
OUT
D
Z
GENERATOR
Test Circuits and Timing Diagrams
CL = 50pF
R L = 500:
50:
V CC /2
V CC
0
tZL, tZL(SHDN)
V OM = (VOL + V CC ) / 2
0.25V
tLZ
OUT
0
Figure 8: Driver Enable and Disable Times Test Circuit and Timing Diagram
DE = 0 or 3V
DI = 0 or 3V
A/Y
IOSD
D
B/Z
100
-7V to +12V
V
Figure 9: Driver Contention Test
2/24/20
Rev 1.0.3
9
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Test Circuits and Timing Diagrams
VCC
Y
0 or V CC
DI
RL = 500
S1
OUT
D
Z
GENERATOR
CL = 50pF
50
V CC
V CC / 2
DE
0
tZL, t ZL(SHDN)
tLZ
V CC OUT
V OM = (V OL + V CC ) / 2
V OL
0.25V
Figure 10: Driver Enable and Disable Times Test Circuit and Timing Diagram
A
V ID
B
R
RE
OUT
CL
15pF
A
+1V
B
-1V
t PHL
OUT
tPLH
1.5V
V OH
V OL
Figure 11: Receiver Propagation Delay Test Circuit and Timing Diagram
2/24/20
Rev 1.0.3
10
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
S1
S3
1.5V
Test Circuits and Timing Diagrams
B
-1.5V
VCC
1k
A
R
S2
RE
GENERATOR
CL = 15pF
50
Figure 12: Receiver Enable and Disable Times Test Circuit
S1 is closed, S2 is open, S3 = -1.5V
S1 is open S2 is closed S3 = 1.5V
3V
3V
1.5V
RE
1.5V
RE
tZH, t ZH(SHDN)
t ZL, t ZL(SHDN)
V OH
OUT
V OH /2
V CC
OUT
0V
V OL = V CC /2
V OL
S1 is closed, S2 is open, S3 = -1.5V
S1 is open S2 is closed S3 = 1.5V
3V
RE
3V
1.5V
RE
tHZ
0.25V
OUT
0V
1.5V
t LZ
V OH
V CC
OUT
0V
0V
0.25V
V OL
Figure 13: Receiver Enable and Disable Timing Diagram
2/24/20
Rev 1.0.3
11
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Function Tables
Function Tables
Table 10: SP3070E, SP3073E, SP3076E (Full Duplex)
Table 11: SP3070E, SP3073E, SP3076E (Full Duplex)
Transmitting
Receiving
Inputs
Outputs
Inputs
Output
RE
DE
DI
Z
Y
RE
DE
AB
RO
X
1
1
0
1
0
X
-50mV
1
X
1
0
1
0
0
X
-200mV
0
0
0
X
High-Z
1
0
X
Shutdown
X
X
Open,
Shorted
1
1
1
X
High-Z
1
0
X
Shutdown
Table 12: SP3071E, SP3074E, SP3077E (Full Duplex)
Table 13: SP3071E, SP3074E, SP3077E (Full Duplex)
Transmitting
Receiving
Input
Outputs
Inputs
Output
DI
Z
Y
A, B
RO
1
0
1
-50mV
1
0
1
0
-200mV
0
Open / shorted
1
Table 14: SP3072E, SP3075E, SP3078E (Half Duplex)
Table 15: SP3072E, SP3075E, SP3078E (Half Duplex)
Transmitting
Receiving
Inputs
Inputs
Outputs
Output
RE
DE
DI
B/Z
A/Y
RE
DE
AB
RO
X
1
1
0
1
0
X
-50mV
1
X
1
0
1
0
0
X
-200mV
0
0
0
X
High-Z
1
0
X
Shutdown
X
X
Open /
shorted
1
1
1
X
High-Z
1
0
X
Shutdown
2/24/20
Rev 1.0.3
12
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Pin Information
Pin Information
Pin Configurations
RO
1
RE
2
DE
3
DI
4
8 PIN NSOIC
SP3072E
SP3075E
SP3078E
Half Duplex
8
Vcc
Vcc
1
7
B
RO
2
6
A
DI
3
5
GND
GND
4
8 PIN NSOIC
SP3071E
SP3074E
SP3077E
Full Duplex
8
A
7
B
6
Z
5
Y
NC
1
RO
2
RE
3
DE
4
DI
5
GND
6
GND
7
14 Vcc
14 PIN NSOIC
SP3070E
SP3073E
SP3076E
Full Duplex
13 NC
12 A
11 B
10
Z
9
Y
8
NC
Figure 14: Pin Configurations
Pin Descriptions
Table 16: Pin Descriptions
Pin Number
Full Duplex Devices
Half Duplex
Devices
Pin Name
Pin Function
1
RO
Receiver Output. When RE is low and if (A-B) ≥ -50mV, RO is
High. If (A-B) ≤ -200mV, RO is low.
-
2
RE
Receiver Output Enable. When RE is low, RO is enabled. When
RE is high, RO is high impedance. RE should be high and DE low
to enter shutdown mode. RE is a hot swap input.
4
-
3
DE
Driver Output Enable. When DE is high, outputs are enabled.
When DE is low, outputs are high impedance. DE should be low
and RE high to enter shutdown mode. DE is a hot-swap input.
5
3
4
DI
Driver Input. With DE high, a low level on DI forces noninverting
output low and inverting output high. Similarly, a high level on DI
forces noninverting output high and inverting output low.
6, 7
4
5
GND
Ground
9
5
-
Y
Noninverting Driver Output
10
6
-
Z
Inverting Driver Output
11
7
-
B
Inverting Receiver Input
-
-
7
B
Inverting Receiver Input and Inverting Driver Output
12
8
-
A
Noninverting Receiver Input
-
-
6
A
Noninverting Receiver Input and Noninverting Driver Output
Positive Supply VCC. Bypass VCC to GND with a 0.1µF capacitor
No connect.
SP3070E
SP3071E
SP3072E
SP3073E
SP3074E
SP3075E
SP3076E
SP3077E
SP3078E
2
2
3
14
1
8
VCC
1, 8, 13
-
-
NC
2/24/20
Rev 1.0.3
13
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Detailed Description
Detailed Description
The SP307XE family of high speed transceivers for RS-485
/RS-422 communication contain one driver and one
receiver. These devices feature fail-safe circuitry, which
guarantees a logic-high receiver output when the receiver
inputs are open or shorted, or when they are connected to
a terminated transmission line with all drivers disabled. The
SP3070E, SP3072E, SP3073E, SP3075E, SP3076E and
SP3078E also feature a hot-swap capability allowing live
insertion without error data transfer. The SP3070E,
SP3071E and SP3072E feature reduced slew-rate drivers
that minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free data
transmission up to 250kbps. The SP3073E, SP3074E and
SP3075E also offer slew-rate limits allowing transmit
speeds up to 500kbps. The SP3076E, SP3077E,
SP3078E driver slew rates are not limited, making transmit
speeds up to 16Mbps possible.
The SP3072E, SP3075E and SP3078E are half-duplex
transceivers, while the SP3070E, SP3071E, SP3073E,
SP3074E, SP3076E and SP3077E are full duplex
transceivers.
All devices operate from a single 3.3V supply. Drivers are
output short-circuit current limited. Thermal-shutdown
circuitry protects drivers against excessive power
dissipation. When activated, the thermal-shutdown circuitry
places the driver outputs into a high-impedance state.
Receiver Input Filtering
SP3070E-SP3075E receivers incorporate input filtering in
addition to input hysteresis. This filtering enhances noise
immunity with differential signals that have very slow rise
and fall times. Receiver propagation delay increases by
25% due to this filtering.
Fail Safe
The SP3070E family guarantees a logic-high receiver
output when the receiver inputs are shorted, open, or when
they are connected to a terminated transmission line with
all drivers disabled. If A - B is less than or equal to -200mV,
RO is logic low. In the case of a terminated bus with all
transmitters disabled, the receiver's differential input
voltage is pulled to 0V by the termination. With the receiver
thresholds of the SP3070E family, this results in a logic
high with a 50mV minimum noise margin. In compliance
with the EIA / TIA-485 standard, the SP3070E family has a
50mV - 200mV threshold.
2/24/20
Hot-Swap Capability
When circuit boards are inserted into a hot backplane,
differential disturbances to the data bus can lead to data
errors. Upon initial circuit board insertion, the data
communication processor undergoes its own power-up
sequence. During this period, the processor's logic-output
drivers are high impedance and are unable to drive the DE
and RE inputs of these devices to a defined logic level.
Leakage currents up to 10µA from the high-impedance
state of the processor's logic drivers could cause standard
CMOS enable inputs of a transceiver to drift to an incorrect
logic level. Additionally, parasitic circuit board capacitance
could cause coupling of VCC or GND to the enable inputs.
Without the hot-swap capability, these factors could
improperly enable the transceiver's driver or receiver.
When VCC rises, an internal pulldown circuit holds DE low
and RE high for approximately 10 microseconds. After the
initial power-up sequence, the pulldown circuit becomes
transparent, resetting the hot-swap tolerable input.
15kV ESD Protection
As with all MaxLinear devices, ESD-protection structures
are incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The driver output and receiver inputs of the SP3070E
family of devices have extra protection against static
electricity. MaxLinear's engineering team have developed
state of the art structures to protect these pins against ESD
of 15kV without damage. The ESD structures withstand
high ESD in all states: normal operation, shutdown and
powered down. After an ESD event, the SP3070E SP3078E keep working without latchup or damage.
ESD protection can be tested in various ways. The
transmitter outputs and receiver inputs of the SP3070E SP3078E are characterized for protection to the following
limits:
■
■
±15kV using the Human Body Model
■
±15kV Airgap
Rev 1.0.3
±8kV using the Contact Discharge method specified in
IEC 61000-4-2
14
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
ESD Test Conditions
Detailed Description
free data transmission up to 250kbps. The SP3073E,
SP3074E and SP3075E offer higher driver output slew-rate
limits, allowing transmit speeds up to 500kbps.
ESD performance depends on a variety of conditions.
Contact MaxLinear for a reliability report that documents
test setup, methodology and results.
Low Power Shutdown Mode
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does not
specifically refer to integrated circuits. The SP3070E family
of devices helps you design equipment to meet IEC 610004-2, without the need for additional ESD-protection
components.
Low-power shutdown mode is initiated by bringing both RE
high and DE low. In shutdown, the devices typically draw
only 50nA of supply current.
RE and DE can 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.
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 1000-4-2 model. Hence, the ESD withstand voltage
measured to IEC 61000-4-2 is generally lower than that
measured using the Human Body Model.
Enable times tZH and tZL assume the part was not in a lowpower shutdown state. Enable times tZH(SHDN) and
tZL(SHDN) assume the parts were shut down. It takes drivers
and receivers longer to become enabled from low-power
shutdown mode tZH(SHDN) and tZL(SHDN) than from driver /
receiver-disable mode (tZH, tZL).
The air-gap test involves approaching the device with a
charged probe. The contact-discharge method connects
the probe to the device before the probe is energized.
Driver Output Protection
Machine Model
The machine model for ESD tests all pins using a 200pF
storage capacitor and zero discharge resistance. The
objective is to emulate the stress caused when I/O pins are
contacted by handling equipment during test and
assembly.
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus contention.
First, current limit on the output stage, provides immediate
protection against short circuits over the whole commonmode voltage range.
Second, a thermal-shutdown circuit, forces the driver
outputs into a high-impedance state if the die temperature
becomes excessive.
256 Transceivers on the Bus
Line Length
The standard RS-485 receiver input impedance is 12kΩ
(1 unit load), and the standard driver can drive up to 32 unit
loads. The SP3070E family of transceivers has 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 as
well as other RS-485 transceivers with a total of 32 unit
loads or fewer can be connected to the line.
The RS-485/RS422 standard covers line lengths up to
4000ft.
Reduced EMI and Reflections
To minimize reflections, terminate the line at both ends in
its characteristic impedance, and keep stub lengths off the
main line as short as possible. The slew-rate-limited
SP3070E - SP3075E are more tolerant of imperfect
termination.
The SP3070E, SP3071E and SP3072E feature reduced
slew-rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing error-
2/24/20
Typical Applications
The SP3072E, SP3075E and SP3078E transceivers are
designed for bidirectional data communications on
multipoint bus transmission lines.
Rev 1.0.3
15
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Parts Selector Guide
Parts Selector Guide
Table 17: Parts Selector Guide
Part
Number
Half / Full
Duplex
Data Rate
(Mbps)
Shutdown
Receiver
Driver
Enable
Transceivers
on Bus
Pin
Count
Industry Standard
Pinout
SP3070E
Full
0.25
Yes
Yes
256
14
MAX3070E, 75180
SP3071E
Full
0.25
No
No
256
8
MAX3071E, 75179
SP3493
SP3072E
Half
0.25
Yes
Yes
256
8
MAX3072E, 75176
SP3483
SP3073E
Full
0.5
Yes
Yes
256
14
MAX3073E, 75180
SP3074E
Full
0.5
No
No
256
8
MAX3074E, 75179
SP3075E
Half
0.5
Yes
Yes
256
8
MAX3075E, 75176
SP3494
SP3076E
Full
16
Yes
Yes
256
14
MAX3076E, 75180
SP3491
SP3077E
Full
16
No
No
256
8
MAX3077E, 75179
SP3490
SP3078E
Half
16
Yes
Yes
256
8
MAX3078E, 75176
SP3485, SP3481
2/24/20
Rev 1.0.3
Pin Compatible
Upgrade from:
16
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Mechanical Dimensions
Mechanical Dimensions
NSOIC8
Front View
Side View
Drawing No:
Revision:
POD-00000108
A
Figure 15: Mechanical Dimension, NSOIC8
2/24/20
Rev 1.0.3
17
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Mechanical Dimensions
Mechanical Dimensions
NSOIC14
Top View
Front View
Side View
Drawing No:
POD-00000109
Revision:
A
Figure 16: Mechanical Dimensions, NSOIC14
2/24/20
Rev 1.0.3
18
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Ordering Information
Ordering Information
Table 18: Ordering Information
Operating Temperature Range
Package
Packaging Method
Lead-Free(2)
Duplex / Data Rate
SP3070EEN-L
-40°C to 85°C
NSOIC14
Tube
Yes
Full / 250kbps
SP3070EEN-L/TR
-40°C to 85°C
NSOIC14
Reel
Yes
Full / 250kbps
SP3071EEN-L
-40°C to 85°C
NSOIC8
Tube
Yes
Full / 250kbps
SP3071EEN-L/TR
-40°C to 85°C
NSOIC8
Reel
Yes
Full / 250kbps
SP3072EEN-L
-40°C to 85°C
NSOIC8
Tube
Yes
Half / 250kbps
SP3072EEN-L/TR
-40°C to 85°C
NSOIC8
Reel
Yes
Half / 250kbps
SP3072EMN-L/TR
-40°C to 125°C
NSOIC8
Reel
Yes
Half / 250kbps
-40°C to 85°C
NSOIC14
Reel
Yes
Full / 500kbps
-40°C to 85°C
NSOIC8
Reel
Yes
Full / 500kbps
SP3075EEN-L
-40°C to 85°C
NSOIC8
Tube
Yes
Half / 500kbps
SP3075EEN-L/TR
-40°C to 85°C
NSOIC8
Reel
Yes
Half / 500kbps
SP3076EEN-L
-40°C to 85°C
NSOIC14
Tube
Yes
Full / 16Mbps
SP3076EEN-L/TR
-40°C to 85°C
NSOIC14
Reel
Yes
Full / 16Mbps
SP3076EMN-L/TR
-40°C to 125°C
NSOIC14
Reel
Yes
Full / 16Mbps
SP3077EEN-L
-40°C to 85°C
NSOIC8
Tube
Yes
Full / 16Mbps
SP3077EEN-L/TR
-40°C to 85°C
NSOIC8
Reel
Yes
Full / 16Mbps
SP3078EEN-L
-40°C to 85°C
NSOIC8
Tube
Yes
Half / 16Mbps
SP3078EEN-L/TR
-40°C to 85°C
NSOIC8
Reel
Yes
Half / 16Mbps
SP3078EMN-L/TR
-40°C to 125°C
NSOIC8
Reel
Yes
Half / 16Mbps
Ordering Part Number
SP3070E
SP3071E
SP3072E
SP3073E
SP3073EEN-L/TR
SP3074E
SP3074EEN-L/TR
SP3075E
SP3076E
SP3077E
SP3078E
1. Refer to http://www.maxlinear.com/SP3070E, http://www.maxlinear.com/SP3071E, http://www.maxlinear.com/SP3072E, http://www.maxlinear.com/
SP3073E, http://www.maxlinear.com/SP3074E, http://www.maxlinear.com/SP3075E, http://www.maxlinear.com/SP3076E, http://www.maxlinear.com/
SP3077E and http://www.maxlinear.com/SP3078E for most up-to-date Ordering Information.
2. Visit www.maxlinear.com for additional information on Environmental Rating.
2/24/20
Rev 1.0.3
19
SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet
Disclaimer
MaxLinear, Inc.
5966 La Place Court, Suite 100
Carlsbad, CA 92008
760.692.0711 p.
760.444.8598 f.
www.maxlinear.com
The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by
MaxLinear, Inc. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this
guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be
reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or
otherwise), or for any purpose, without the express written permission of MaxLinear, Inc.
Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be
expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless
MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c)
potential liability of MaxLinear, Inc. is adequately protected under the circumstances.
MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except
as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents,
trademarks, copyrights, or other intellectual property.
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sold, are all trademarks of MaxLinear, Inc. or one of MaxLinear’s subsidiaries in the U.S.A. and other countries. All rights reserved. Other company trademarks and
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