Datasheet SP3487CP, SP3487CT, SP3487EP, SP3487ET, SP3486CP Datasheet (Sipex Corporation)
...Page 1
®
SP3486 and SP3487
®
+3.3V Low Power Quad
RS-485/RS-422 Line Drivers
■ RS-485 or RS-422 Quad Differential
Line Drivers
■ Operates from a single +3.3V supply
■ Interoperable with +5.0V logic
■ Tri-state Output Control
■ -7V to +12V Common-Mode Input
Voltage Range
■ Common Driver Enable Control (SP3486)
■ Independent Driver Enable Controls for
each pair of Drivers (SP3487)
■ Compatibility with LTC486
and SN75172 (SP3486)
■ Compatibility with LTC487
and SN75174 (SP3487)
DESCRIPTION
The SP3486 and the SP3487 are +3.3V low power quad drivers that meet the specifications
of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with
Sipex's SP486 and SP487 devices as well as popular industry standards. The SP3486 and
SP3487 feature Sipex's BiCMOS process allowing low power operation without sacrificing
performance. The SP3486 and SP3487 meet the electrical specifications of RS-485 and
RS-422 serial protocols up to 10Mbps under load. The SP3486 features a common driver
enable control. The SP3487 provides independent driver enable controls for each pair of
drivers. Both devices feature tri-state outputs and a -7V to +12V common-mode input voltage
range.
V
16
CC
15
DI
4
3
4
14
DO4A
13
B
DO
4
12
EN
11
B
DO
3
10
A
DO
3
9
DI
3
DI
1
1
DO1A
B
DO
1
/EN
EN
1
2
DO2B
A
DO
2
DI
2
GND
1
2
3
4
5
6
2
7
8
SP3487
4
3
V
16
CC
15
DI
4
14
DO4A
13
B
DO
4
12
/EN
EN
3
4
11
DO3B
10
A
DO
3
9
DI
3
DO1A
DO
DO
DO
GND
DI
1
1
B
1
EN
B
2
A
2
DI
2
1
2
3
4
5
6
2
7
8
SP3486
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
1
Page 2
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device
at these 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.
VCC............................................................................................ +7V
Input Voltages
Logic ............................................................. –0.5V to (VCC +0.5V)
Drivers .......................................................... –0.5V to (VCC +0.5V)
Driver Output Voltage ............................................................. ±14V
Input Currents
Logic .................................................................................. ±25mA
Driver ................................................................................. ±25mA
Storage Temperature ............................................–65°C to +150°C
Power Dissipation
Plastic DIP ........................................................................ 375mW
(derate 7mW/°C above +70°C)
Small Outline .................................................................... 375mW
(derate 7mW/°C above +70°C)
Lead Temperature (soldering, 10 sec) ...................................300°C
SPECIFICATIONS
VCC = 3.3V±5%; typicals at 25°C; T
PARAMETER MIN. TYP. MAX. UNIT CONDITIONS
DC CHARACTERISTICS
Digital Inputs DI, EN, EN, EN
Voltage
V
IL
V
IH
Input Current ±2 µAVIN = 0V to V
DRIVER OUTPUTS
Differential Voltage V
Common Mode Output Voltage 3 Volts R = 27Ω or 50Ω;
Change in Common Mode Output Magnitude 0.2 Volts R = 27Ω or 50Ω;
for Complementary Output State R = 50Ω (RS-422)
Maximum Data Rate 10 Mbps
Short–circuit Current
V
OH
V
OL
High Impedance Output Current 1 µAVO = -7V to +12V, TA=25oC
POWER REQUIREMENTS
Supply Voltage 3.00 3.30 3.60 Volts
Supply Current 3.00 µA No load, output enabled
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
–C 0 +70 °C
–E -40 +85 °C
Storage Temperature -65 +150 °C
Package
–_P 16–pin Plastic DIP
–_T 16–pin SOIC
≤ TA ≤ T
MIN
unless otherwise noted.
MAX
0.8 Volts
2.0 Volts
2 Volts R = 50Ω(RS-422)
1.5 V
CC
CC
Volts unloaded
Volts R = 27Ω (RS-485);
R = 27Ω (RS-485)
±250 mA -7V ≤VO ≤ +12V
±250 mA -7V ≤VO ≤ +12V
0.10 µA No load, output disabled
/EN2, EN3/EN
1
CC
Figure 1
4
Figure 1
Figure 1
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
2
Page 3
PINOUT — SP3486
DI
1
DO1A
DO
DO
DO
GND
1
B
1
EN
B
2
A
2
DI
2
1
2
3
4
5
6
2
7
8
SP3486
4
3
DM
V
V
16
CC
15
DI
4
14
DO4A
13
B
DO
4
12
EN
11
B
DO
3
A
10
DO
3
DI
9
3
GENERATOR
(NOTE 1)
50Ω
V
Figure 2. Driver Propagation Delay Test Circuit
Pin 8 — GND — Digital Ground.
S1
D
CC
VOH + V
OM
= 1.5V
V
2
OL
RL = 27Ω
L
= 15PF
C
(NOTE 2)
OUT
SP3486 PINOUT
Pin 1 — DI1 — Driver 1 Input — If Driver 1 output
is enabled, logic 0 on DI1 forces driver output
DO1A low and DO1B high. A logic 1 on DI1 with
Driver 1 output enabled forces driver DO1A high
and DO1B low.
Pin 2 — DO1A — Driver 1 output A.
Pin 3 — DO1B — Driver 1 output B.
Pin 4 — EN — Driver Output Enable. Please refer
to SP3486 Truth Table (1).
Pin 5 — DO2B — Driver 2 output B.
Pin 6 — DO2A — Driver 2 output A.
Pin 7 — DI2 — Driver 2 Input — If Driver 2 output
is enabled, logic 0 on DI2 forces driver output
DO2A low and DO2B high. A logic 1 on DI2 with
Driver 2 output enabled forces driver DO2A high
and DO2B low.
R
V
D
CC
V
OD
R
V
OC
Pin 9 — DI3 — Driver 3 Input — If Driver 3 output
is enabled, logic 0 on DI3 forces driver output
DO3A low and DO3B high. A logic 1 on DI3 with
Driver 3 output enabled forces driver DO3A high
and DO3B low.
Pin 10 — DO3A — Driver 3 output A.
Pin 11 — DO3B — Driver 3 output B.
Pin 12 — EN — Driver Output Disable. Please
refer to SP486 Truth Table (1).
S1
D
C
L = 50pF
GENERATOR
(NOTE 1)
50Ω
(NOTE 2)
VOH + VOL
V
OM = 1.5V
2
Figure 3. Driver Enable and Disable Timing Circuit,
Output HIGH
S1
0V OR 3V
GENERATOR
(NOTE 1)
50Ω
D
C
L
= 50pF
(NOTE 2)
OUT
R
L = 110Ω
V
CC
R
L
= 110Ω
OUT
Figure 1. Driver DC Test Load Circuit
Figure 4. Driver Enable and Disable Timing Circuit,
Output LOW
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
3
Page 4
PINOUT — SP3487
V
DI
1
1
DO1A
B
DO
1
/EN
EN
1
2
DO2B
A
DO
2
DI
2
GND
1
2
3
4
5
6
2
7
8
SP3487
16
CC
15
DI
4
3
4
14
DO4A
13
B
DO
4
12
/EN
EN
3
4
11
DO3B
A
10
DO
3
DI
9
3
Pin 13 — DO4B — Driver 4 output B.
Pin 14 — DO4A — Driver 4 output A.
Pin 15 — DI4 — Driver 4 Input — If Driver 4
output is enabled, logic 0 on DI4 forces driver
output DO4A low and DO4B high. A logic 1 on DI
with Driver 4 output enabled forces driver DO4A
high and DO4B low.
Pin 16—VCC—Positive Supply +3.00V<V
<+3.60V
INPUT ENABLES OUTPUTS
DI EN EN OUTA OUTB
HHX H L
LHX L H
HXL H L
LXL L H
X L H Hi–Z Hi–Z
Table 1. SP3486 Truth Table
Pin 8 — GND — Digital Ground.
Pin 9 — DI3 — Driver 3 Input — If Driver 3 output
is enabled, logic 0 on DI3 forces driver output
DO3A low and DO3B high. A logic 1 on DI3 with
Driver 3 output enabled forces driver DO3A high
and DO3B low.
Pin 10 — DO3A — Driver 3 output A.
4
Pin 11 — DO3B — Driver 3 output B.
Pin 12 — EN3/EN4 — Driver 3 and 4 Output
Enable. Please refer to SP3487 Truth Table (2).
CC
Pin 13 — DO4B — Driver 4 output B.
SP3487 PINOUT
Pin 1 — DI1 — Driver 1 Input — If Driver 1 output
is enabled, logic 0 on DI1 forces driver output
DO1A low and DO1B high. A logic 1 on DI1 with
Driver 1 output enabled forces driver DO1A high
and DO1B low.
Pin 2 — DO1A — Driver 1 output A.
Pin 3 — DO1B — Driver 1 output B.
Pin 14 — DO4A — Driver 4 output A.
Pin 15 — DI4 — Driver 4 Input — If Driver 4
output is enabled, logic 0 on DI4 forces driver
output DO4A low and DO4B high. A logic 1 on DI
with Driver 4 output enabled forces driver DO4A
high and DO4B low.
Pin 16 —VCC —Positive Supply +3.00V < V
< +3.60V
Pin 4 — EN1/EN2 — Driver 1 and 2 Output
Enable. Please refer to SP3487 Truth Table (2).
Pin 5 — DO2B — Driver 2 output B.
Pin 6 — DO2A — Driver 2 output A.
Pin 7 — DI2 — Driver 2 Input — If Driver 2 output
is enabled, logic 0 on DI2 forces driver output
DO2A low and DO2B high. A logic 1 on DI2 with
Driver 2 output enabled forces driver DO2A high
and DO2B low.
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
INPUT ENABLES OUTPUTS
DI EN1/EN2 or EN3/EN4 OUTA OUTB
HHHL
LHLH
X L Hi–Z Hi–Z
Table 2. SP3487 Truth Table
4
4
CC
Page 5
FEATURES
Driver
The SP3486 and the SP3487 are +3.3V low power
quad line drivers that meet the specifications of
the RS-485 and RS-422 serial protocols. These
devices are pin-to-pin compatible with Sipex's
SP486 and SP487 devices as well as popular
industry standards. The SP3486 and SP3487
devices feature Sipex's BiCMOS process
allowing low power operation without sacrificing
performance.
The RS-485 standard is ideal for multi-drop
applications or for long distance interfaces.
RS-485 allows up to 32 drivers and 32 receivers
to be connected to a data bus, making it an ideal
choice for multi-drop applications. Since the
cabling can be as long as 4,000 feet, RS-485
transceivers are equipped with a wide (-7V to
+12V) common mode range to accomodate
ground potential differences. Data is virtually
immune to noise in the transmission line because
the RS-485 protocol is a differential interface.
The drivers for both the SP3486 and SP3487
have differential outputs. The typical voltage
output swing with no load will be 0V to +5V.
With worst case loading of 54Ω across the
differential outputs, the driver can maintain
greater than +1.5V voltage levels.
The drivers of the SP3486 feature active HIGH
and active LOW common driver enable
controls. Refer to SP3486 Truth Table in Table
1. The SP3487 provides independent, active
high driver enable controls for each pair of
drivers. Refer to SP3487 Truth Table in Table 2.
The driver outputs are short-circuit limited
to 250mA. The SP3486 and SP3487 drivers
meet the electrical specifications of RS-485
and RS-422 serial protocols up to 10Mbps
under load.
AC PARAMETERS
VCC = +3.3V±5%; typicals at 25°C; T
PARAMETER MIN. TYP. MAX. UNIT CONDITIONS
PROPAGATION DELAY
Driver Input to Output
Low to High (t
High to Low (t
Differential Driver Skew 5 10 ns | t
Driver Rise Time (tR) 10% to 90% R
SP3486 10 ns
SP3487 10 ns
Driver Fall Time (tF) 90% to 10% R
SP3486 10 ns
SP3487 10 ns
DRIVER ENABLE
To Output High 110 ns
To Output Low 110 ns
DRIVER DISABLE
From Output Low 110 ns
From Output High 110 ns
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
) 204060 ns
PLH
) 204060 ns
PHL
= 25°C unless otherwise noted.
AMB
Figure 2 and 5
(Y) - t
PLH
(Y) |, | t
PHL
Figures 2 and 5
Figures 3 and 6
Figures 4 and 6
Figures 4 and 6
Figures 3 and 6
DIFF
DIFF
PHL
= 60Ω
= 60Ω
(Z) - t
PLH
(Z) | ,
5
Page 6
3V
INPUT
0V
OH
V
Y OUTPUT
V
OL
V
OH
Z OUTPUT
OL
V
Figure 5. Driver Propagation Delay Waveforms
3V
INPUT
0V
OH
V
OUTPUT
HIGH
OUTPUT
LOW
0V
V
CC
OL
V
VOM =
1.5V
t
PLH
t
PHL
V
OH
+ V
2
1.5V
t
PZH
t
PZL
1.5V
t
PHL
V
V
OM
OM
V
OL
≈ 1.5V
OM
t
PLH
V
OM
1.5V
PHZ
t
V
OM
OM
V
0.25V
t
PLZ
0.25V
OH
+ V
OL
V
OM
=
V
≈ 1.5V
2
Figure 6. Driver Enable and Disable Timing Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
INPUT=250kHz, 50% duty cycle, tr < 6.0ns, Zo=50Ω.
NOTE 2: CL includes probe and stray capacitance.
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
6
Page 7
D1 = 0.005" min.
(0.127 min.)
D
e = 0.100 BSC
(2.540 BSC)
B1
B
ALTERNATE
END PINS
(BOTH ENDS)
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
A1 = 0.015" min.
(0.381min.)
A = 0.210" max.
(5.334 max).
A2
L
C
Ø
eA = 0.300 BSC
(7.620 BSC)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
A2
B
B1
C
D
E
E1
L
Ø
16–PIN
0.115/0.195
(2.921/4.953)
0.014/0.022
(0.356/0.559)
0.045/0.070
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.780/0.800
(19.812/20.320)
0.300/0.325
(7.620/8.255)
0.240/0.280
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
7
Page 8
D
Be
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
A
A1
B
D
E
e
H
L
Ø
EH
A
A1
16–PIN
0.093/0.104
(2.352/2.649)
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.398/0.413
(10.10/10.49)
0.291/0.299
(7.402/7.600)
0.050 BSC
(1.270 BSC)
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
0°/8°
(0°/8°)
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
Ø
L
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
8
Page 9
ORDERING INFORMATION
Quad RS485 Drivers:
Model..................................................... Enable/Disable .......................................... Temperature Range ......................................... Package
SP3486CP .......................... Common; active Low and Active High ............................. 0°C to +70°C..................................... 16–pin Plastic DIP
SP3486CT........................... Common; active Low and Active High ............................. 0°C to +70°C .............................................. 16–pin SOIC
SP3486EP........................... Common; active Low and Active High ........................... –40°C to +85°C .................................. 16–pin Plastic DIP
SP3486ET ........................... Common; active Low and Active High ........................... –40°C to +85°C ........................................... 16–pin SOIC
SP3487CP ............................... One per driver pair; active High ................................... 0°C to +70°C..................................... 16–pin Plastic DIP
SP3487CT................................ One per driver pair; active High ...................................0°C to +70°C.............................................. 16–pin SOIC
SP3487EP................................ One per driver pair; active High ................................ –40°C to +85 °C .................................. 16–pin Plastic DIP
SP3487ET ................................ One per driver pair; active High ................................ –40°C to +85°C ........................................... 16–pin SOIC
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP3486/3487DS/12 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation
9
Loading...