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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.
DI1 DO1A DO1B EN DO2B DO2A DI2 GND
1
SP3486 1
16 15
VCC DI4 DO4A DO4B EN DO3B DO3A DI3
DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND
1
SP3487 1
16 15
VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3
2
2
4
3 4 5 6 14 13 12 11 3 4 5 6
4
14 13 12 11
2
7 10
2
7 10
3
8 9
3
8 9
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2002 Sipex Corporation
1
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 ......................................................................................... +6.0V Input Voltages Logic ............................................................ -0.3V to +6.0V Drivers ......................................................... -0.3V to +6.0V Driver Output Voltage ............................................................. 14V Input Currents Logic ........................................................................ 25mA Driver ....................................................................... 25mA Storage Temperature ............................................ -65C to +150C Power Dissipation Plastic DIP .......................................................................... 375mW (derate 7mW/C above +70C) Small Outline ...................................................................... 375mW (derate 7mW/C above +70C) Lead Temperature (soldering, 10 sec) ................................... 300C
SPECIFICATIONS
VCC = 3.3V5%; typicals at 25C; TMIN TA TMAX unless otherwise noted.
PARAMETER DC CHARACTERISTICS Digital Inputs Voltage VIL VIH Input Current DRIVER OUTPUTS Differential Voltage
MIN.
TYP.
MAX.
UNIT
CONDITIONS
DI, EN, EN, EN1/EN2, EN3/EN4
0.8 2.0 2 VCC VCC 3 0.2
Volts Volts A Volts Volts Volts Volts Volts Mbps
VIN = 0V to VCC unloaded R = 50(RS-422) R = 27 (RS-485); Figure 1 R = 27 or 50; Figure 1 R = 27 or 50; Figure 1 R = 50 (RS-422) R = 27 (RS-485) -7V VO +12V -7V VO +12V VO = -7V to +12V, TA=25oC
2 1.5 Common Mode Output Voltage Change in Common Mode Output Magnitude for Complementary Output State Maximum Data Rate 10 Short-circuit Current VOH VOL High Impedance Output Current POWER REQUIREMENTS Supply Voltage 3.00 Supply Current
250 250 1 3.30 3.00 0.10 3.60
mA mA A Volts A A
No load, output enabled No load, output disabled
ENVIRONMENTAL AND MECHANICAL Operating Temperature -C 0 +70 -E -40 +85 Storage Temperature -65 +150 Package -_P 16-pin Plastic DIP -_T 16-pin SOIC
C C C
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2000 Sipex Corporation
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PINOUT -- SP3486
VDM
DI1 DO1A DO1B EN DO2B DO2A DI2 GND 1
SP3486 1
16 15
VCC
RL = 27
DI4 DO4A DO4B EN DO3B DO3A
2
S1 D GENERATOR (NOTE 1) 50 VCC OUT CL = 15PF (NOTE 2)
4
3 4 5 6 14 13 12 11
VOM = VOH + VOL 2
1.5V
2
7 10
3
8 9 DI3
Figure 2. Driver Propagation Delay Test Circuit
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. Pin 11 -- DO3B -- Driver 3 output B. Pin 12 -- EN -- Driver Output Disable. Please refer to SP486 Truth Table (1).
S1 D CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50 OUT RL = 110
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.
VOM = VOH + VOL 2
1.5V
Figure 3. Driver Enable and Disable Timing Circuit, Output HIGH
VCC
R
S1
RL = 110 0V OR 3V D CL = 50pF (NOTE 2) OUT
D VCC
VOD R VOC
GENERATOR (NOTE 1)
50
Figure 1. Driver DC Test Load Circuit
Figure 4. Driver Enable and Disable Timing Circuit, Output LOW
SP3486/3487 Low Power Quad RS485/422 Line Drivers (c) Copyright 2002 Sipex Corporation
10/15/02
3
PINOUT -- SP3487
INPUT
DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1
ENABLES EN H H X X L EN X X L L H
OUTPUTS OUTA H L H L Hi-Z OUTB L H L H Hi-Z
SP3487 1
16 15
VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3
DI H L H L X
2
4
3 4 5 6 14 13 12 11
2
7 10
3
8 9
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. Pin 11 -- DO3B -- Driver 3 output B. Pin 12 -- EN3/EN4 -- Driver 3 and 4 Output Enable. Please refer to SP3487 Truth Table (2). 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 DI4 with Driver 4 output enabled forces driver DO4A high and DO4B low. Pin 16 --VCC --Positive Supply +3.00V < VCC < +3.60V
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 DI4 with Driver 4 output enabled forces driver DO4A high and DO4B low. Pin 16--VCC--Positive Supply +3.00VSP3487 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 -- EN1/EN2 -- Driver 1 and 2 Output Enable. Please refer to SP3487 Truth Table (2). Pin 5 -- DO2B -- Driver 2 output B.
INPUT
ENABLES EN1/EN2 or EN3/EN4 H H L
OUTPUTS OUTA H L Hi-Z OUTB L H Hi-Z
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.
10/15/02
DI H L X
Table 2. SP3487 Truth Table
(c) Copyright 2000 Sipex Corporation
SP3486/3487 Low Power Quad RS485/422 Line Drivers
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FEATURES 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.
Driver 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 54 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 = +3.3V5%; typicals at 25C; TAMB = 25C unless otherwise noted.
PARAMETER PROPAGATION DELAY Driver Input to Output Low to High (tPLH) High to Low (tPHL) Differential Driver Skew Driver Rise Time (tR) SP3486 SP3487 Driver Fall Time (tF) SP3486 SP3487 DRIVER ENABLE To Output High To Output Low DRIVER DISABLE From Output Low From Output High
MIN.
TYP.
MAX.
UNIT
CONDITIONS
Figure 2 and 5
20 20 40 40 5 60 60 10 ns ns ns | tPHL(Y) - tPLH(Y) |, | tPHL(Z) - tPLH(Z) | , Figures 2 and 5 10% to 90% RDIFF = 60 90% to 10% RDIFF = 60
10 10 10 10 110 110
ns ns ns ns ns ns
Figures 3 and 6 Figures 4 and 6
110 110
ns ns
Figures 4 and 6 Figures 3 and 6
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2002 Sipex Corporation
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3V INPUT 0V VOH Y OUTPUT VOL tPHL VOH Z OUTPUT VOL VOM = VOH + VOL 1.5V 2 VOM tPLH VOM tPLH VOM tPHL VOM 1.5V 1.5V
Figure 5. Driver Propagation Delay Waveforms
3V INPUT 0V VOH OUTPUT HIGH 0V VCC OUTPUT LOW VOL VOM = VOH + VOL 1.5V 2 tPZL VOM tPLZ 0.25V tPZH VOM tPHZ 0.25V 1.5V 1.5V
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=50. NOTE 2: CL includes probe and stray capacitance.
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2000 Sipex Corporation
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PACKAGE: PLASTIC DUAL-IN-LINE (NARROW)
E1 E
D1 = 0.005" min. (0.127 min.) D
A1 = 0.015" min. (0.381min.) A = 0.210" max. (5.334 max). A2 C O eA = 0.300 BSC (7.620 BSC) L
e = 0.100 BSC (2.540 BSC)
B1 B
ALTERNATE END PINS (BOTH ENDS)
DIMENSIONS (Inches) Minimum/Maximum (mm) A2 B B1 C D E E1 L O
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)
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2002 Sipex Corporation
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PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE)
E H
D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L O
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)
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2000 Sipex Corporation
8
ORDERING INFORMATION
Quad RS485 Drivers: Model ..................................................... Enable/Disable .......................................... Temperature Range ......................................... Package SP3486CP .......................... Common; active Low and Active High ............................. 0C to +70C ..................................... 16-pin Plastic DIP SP3486CT ........................... Common; active Low and Active High ............................. 0C to +70C .............................................. 16-pin SOIC SP3486EP ........................... Common; active Low and Active High ........................... -40C to +85C .................................. 16-pin Plastic DIP SP3486ET ........................... Common; active Low and Active High ........................... -40C to +85C ........................................... 16-pin SOIC SP3487CP ............................... One per driver pair; active High ................................... 0C to +70C ..................................... 16-pin Plastic DIP SP3487CT ................................ One per driver pair; active High ................................... 0C to +70C .............................................. 16-pin SOIC SP3487EP ................................ One per driver pair; active High ................................ -40C to +85C .................................. 16-pin Plastic DIP SP3487ET ................................ One per driver pair; active High ................................ -40C to +85C ........................................... 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 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com
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.
10/15/02
SP3486/3487 Low Power Quad RS485/422 Line Drivers
(c) Copyright 2002 Sipex Corporation
9

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