®
SP3070E - SP3078E Family
±15kV
ESD-Protected, 3.3V, 1/8 Load, Failsafe
RS-485/RS422 Transceivers
FEATURES
■
±15kV
ESD protection for RS485 pins
■
3.3V low-power operation
■
Advanced
receiver-failsafe
protection for
open, shorted or terminated lines
■
Up to 256 Transceivers may share
bus
■
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 foot-
prints
■
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)
NC
1
RO
2
RE
3
DE
4
DI
5
GND
6
GND
7
14
V
CC
RO
1
RE
2
DE
3
DI
4
8 PIN NSOIC
SP3072E
SP3075E
SP3078E
Half Duplex
8
V
CC
7
B
6
A
5
GND
V
CC
1
R
O
2
DI
3
I
GND
4
8 PIN NSOIC
SP3071E
SP3074E
SP3077E
Full Duplex
8
A
7
B
6
Z
5
Y
■
Three applications-optimized speed grades
■
SP3070-72E: 250kbps
fully
slew-limited
■
SP3073-75E: 500kbps slew-limited
■
SP3076-78E: 16Mbps high speed
14 Pin NSOIC
SP3070E
SP3073E
SP3076E
Full Duplex
13
NC
12
A
11
B
10
Z
9
Y
8
NC
■
Small form factor SO-narrow packages
■
Industrial (-40 to +85ºC) and Extended
(-40 to +125ºC) temperature grades
Now Available in Lead Free Packaging
APPLICATIONS
■
Industrial Control, Utility Meters Building Automation, Instrumentation, Point of Sale
DESCRIPTION
The SP3070-3078E differential line transceivers are suitable for bidirectional communication
on balanced multipoint bus transmission lines and comply with both RS485 and RS422 EIA
Standards. Each device consists of a differential driver and differential receiver. All devices
operate from a 3.3V power supply.
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 RS485 inputs are ESD protected up to
±15kV
(Air-Gap and Human Body Model) and up
to
±8kV
Contact discharge (IEC 1000-4-2).
Date: 03/31/05
SP3070E - SP3078E Family,
±
15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
1
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
R
1
2
R
RE 3
4
DE
D 5
6
GND
7
GND
D
14 V
CC
13 NC
12 A
11 B
10
14 Pin Full Duplex:
SP3070E, 250kbps slew limited
SP3073E, 500kbps slew limited
SP3076E, 16Mbps
Z
9 Y
8
NC
V
CC
1
R
2
R
8 A
7 B
6
8 Pin Full Duplex:
SP3071E, 250kbps slew limited
SP3074E, 500kbps slew limited
SP3077E, 16Mbps
D
GND
3
4
Z
D
5 Y
RO
1
R
8 V
CC
7
B
6
A
8 Pin Half Duplex:
SP3072E, 250kbps slew limited
SP3075E, 500kbps slew limited
SP3078E, 16Mbps
2
RE
DE 3
DI
4
D
5
GND
Date: 03/31/05
SP3070E - SP3078E Family,
±
15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
2
ABSOLUTE MAXIMUM RATINGS
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.
V
CC
.....................................................................................................+6.0V
Input Voltage at control input pins (RE, DE).........................-0.3V to 6V
Driver Input Voltage (RE, DE)...............................................-0.3V to 6V
Driver Output Voltage (A, B, Y, & Z)....................................-8V to +13V
Receiver Input Voltage (A, B)..............................................-8V to +13V
Continuous Power Dissipation at Ta = 70
o
C
8-pin SO (derate 5.88mW/
o
C above +70
o
C)................................471mW
8-pin PDIP (derate 9.29mW/
o
C above +70
o
C)............................727mW
14-pin SO (derate 8.33mW/
o
C above +70
o
C).............. .............667mW
14-pin PDIP (derate 10mW/
o
C above +70
o
C).................. ..........800mW
Operating Temperature Ranges
SP307_EMN.................................................................-40ºC to +125ºC
SP307_EEN ...............................................................-40ºC to +85ºC
Junction Temperature............................................................. ..+150ºC
Storage Temperature Range..........................................-65ºC to +150º C
Lead Temperature (soldering, 10s) ........................................... +300º C
ELECTRICAL CHARACTERISTICS
Unless otherwise noted V
CC
= +3.3
±0.3V,
ambient temperature T
MIN
< T
A
< T
MAX
. Typical values are at V
CC
= 3.3,
ambient temperature T
A
= +25ºC. The
♦
denotes the specifications which apply over the full operating range
unless otherwise noted.
PARAMETER
SYM.
MIN .
2
Differential Driver Output
V
OD
1.5
TYP.
MAX.
V
CC
V
CC
V
CC
Change in Magnitude of
Differential Output Voltage
Driver Common Mode Output
Voltage
Change in Magnitude of
Common Mode Output
Voltage
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Current
Input Impedance First
Transition (Hotswap)
Output Leakage (Y and Z)
Full Duplex (A and B)
∆
V
OD
V
OC
V
CC
/2
0.2
3
V
V
V
♦
♦
♦
UNITS
♦
CONDITIONS
RL = 100
Ω
(RS-422), Figure 1
RL = 54
Ω
(RS-485), Figure 1
No Load
RL = 54 or 100
Ω
, Figure 1
RL = 54 or 100
Ω
, Figure 1
∆
V
OC
V
IH
V
IL
V
HYS
I
IN
-1
1
100
2
±0.2
V
V
♦
RL = 54 or 100
Ω
, Figure 1
DE, DI, RE
DE, DI, RE
♦
♦
♦
♦
♦
DE, DI, RE
DE, DI, RE
DE, RE
First transition will draw more
current (Hotswap)
DE = GND
V
CC
= GND or 3.6V
V
IN
= +12 V
V
IN
= -7V
0.8
V
mV
1
10
+125
µA
k
Ω
I
O
µA
-100
0
±250
mA
-250
0
Driver Short-Circuit Current
I
OSD
-7V
≤
V
OUT
≤
12V, (Figure 4A)
Date: 03/31/05
SP3070E - SP3078E Family,
±
15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
3
ELECTRICAL CHARACTERISTICS
Unless otherwise noted V
CC
= +3.3
±0.3V,
ambient temperature T
MIN
< T
A
< T
MAX
. Typical values are at V
CC
= 3.3,
ambient temperature T
A
= +25ºC. The
♦
denotes the specifications which apply over the full operating range
unless otherwise noted.
PARAMETERS
SYM
MIN
TYP
MAX
125
UNITS
♦
CONDITIONS
V
IN
= +12V
V
IN
= -7V
Input Current (A and B)
Half Duplex
Thermal-Shutdown Threshold
Thermal Shutdown Hysteresis
RECEIVER
Receiver Differential Threshold
(Sensitivity)
Receiver Input Hysteresis
RO Output High Voltage
RO Output Low Voltage
Tri-State Output Current at
Receiver
Receiver Input Resistance
Receiver Output Short-Circuit
Current
SUPPLY CURRENT
I
A,B
-100
T
TS
T
TSH
165
15
µA
♦
DE = GND
V
CC
= GND or 3.6
ºC
ºC
♦
♦
V
TH
∆
V
TH
V
OH
V
OL
I
OZR
R
IN
I
OZR
-200
-125
15
-50
mV
mV
V
♦
♦
♦
♦
♦
-7V
≤
V
CM
≤
12V
Va + Vb = 0V
I
O
= -1mA
I
O
= 1mA
0
≤
V
O
≤
V
CC
-7V
≤
V
CM
≤
12V
0V
≤
V
RO
≤
V
CC
Vcc -
0.6
0.4
+/-1
96
±60
V
µA
k
Ω
mA
0.8
Supply Current
I
CC
0.8
0.8
Supply Current in Shutdown
mode
ESD PROTECTION
±15
ESD Protection for Y, Z, A, and B
±15
±8
I
SHDN
0.05
1.5
1.5
1.5
3
µA
mA
♦
No Load, RE = 0, DE = V
CC
No Load, RE = V
CC
, DE = V
CC
No Load, RE = 0, DE = 0
RE = V
CC
, DE = GND
Human Body Model
kV
♦
Air Gap (IEC 1000-4-2)
Contact (IEC 1000-4-2)
Date: 03/31/05
SP3070E - SP3078E Family,
±
15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
4
DRIVER SWITCHING CHARACTERISTICS
Unless otherwise noted V
CC
= +3.3
±0.3V,
ambient temperature T
MIN
< T
A
< T
MAX
. Typical values are at V
CC
= 3.3,
ambient temperature T
A
= +25ºC.
SP3070E, SP3071E & SP3072E DRIVER SWITCHING CHARACTERISTICS
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Driver Differential Output Skew
(t
DPLH
- t
DPHL
)
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 High
Driver Enable from Shutdown to
Output Low
Time to Shutdown
t
DZH
t
DZL
t
DLZ
t
DHZ
t
DZH(SHDN)
t
DZL(SHDN)
t
SHDN
SYMBOL
t
DPLH
t
DPHL
t
DR,
t
DF
t
DSKEW
MIN.
250
250
350
-
25 0
-
-
-
-
-
-
50
TYP.
-
-
-
-
-
-
-
-
-
-
-
200
MAX.
1500
1500
1600
200
-
2500
2500
100
100
5500
5500
600
UNITS
ns
ns
ns
ns
kbps
ns
ns
ns
ns
ns
ns
ns
Figure 4
Figure 5
Figure 5
Figure 4
Figure 4
Figure 5
CONDITIONS
C
L
= 50pF, R
L
= 54
Ω
,
Figure 2 & 3
C
L
= 50pF, R
L
= 54
Ω
,
Figure 2 & 3
C
L
= 50pF, R
L
= 54
Ω
,
Figure 2 & 3
RECEIVER SWITCHING CHARACTERISTICS
Unless otherwise noted V
CC
= +3.3
±0.3V,
ambient temperature T
MIN
< T
A
< T
MAX
. Typical values are at V
CC
= 3.3,
ambient temperature T
A
= +25ºC.
Receiver Switching Characteristics SP3070, SP3071 & SP3072
PARAMETER
Receiver Propagation Delay
Receiver Output Skew (t
DPLH
- t
DPHL
)
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 High
Receiver Enable from Shutdown to
Outtput Low
t
RZH
t
RZL
t
RLZ
t
RHZ
t
RZH(SHDN)
t
RZL(SHDN)
SYMBOL
t
RPLH
t
RPHL
t
RSKEW
MIN.
-
-
-
250
-
-
-
-
-
-
TYP.
-
-
-
-
-
-
-
-
-
-
MAX.
200
200
30
-
50
50
200
100
4000
4000
UNITS
ns
ns
ns
kbp s
ns
ns
ns
ns
ns
ns
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
C
L
= 15pF, Figure 6 & 7
C
L
= 15pF, Figure 6 & 7
CONDITIONS
Date: 03/31/05
SP3070E - SP3078E Family,
±
15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
5
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