SP487CT-L [SIPEX]
Line Driver, 4 Func, 4 Driver, PDSO16, LEAD FREE, SOIC-16;
| 型号： | SP487CT-L |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Driver, 4 Func, 4 Driver, PDSO16, LEAD FREE, SOIC-16 驱动器 |
| 文件： | 总7页 (文件大小：87K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP486/487
Quad RS-485/RS-422 Line Drivers
■ RS-485 or RS-422 Applications
■ Quad Differential Line Drivers
■ Tri–state Output Control
■ 40ns Typical Driver Propagation
Delays
■ 5ns Skew
■ –7V to +12V Common Mode Output
Range
■ 100µA Supply Current
■ Single +5V Supply Operation
■ Pin Compatible with SN75172,
SN75174, LTC486, and LTC487
DESCRIPTION…
TheSP486andSP487arelow–powerquaddifferentiallinedriversmeetingRS-485andRS-422
standards. The SP486 features a common driver enable control; the SP487 provides indepen-
dent driver enable controls for each pair of drivers. Both feature tri–state outputs and wide
common–mode input range. Both are available in 16–pin plastic DIP and SOIC packages.
DI1
DO1A
DO1B
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
DI1
DO1A
DO1B
EN1/EN2
DO2B
DO2A
DI2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
SP486
4
SP487
4
1
1
DI4
DI4
DO4A
DO4B
EN
DO4A
DO4B
EN3/EN4
DO3B
DO3A
DI3
DO2B
DO2A
DI2
DO3B
DO3A
DI3
2
2
3
3
GND
GND
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
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 = 5V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNIT
CONDITIONS
DC CHARACTERISTICS
Digital Inputs
Voltage
VIL
DI, EN, EN, EN1/EN2, EN3/EN4
0.8
Volts
Volts
µA
VIH
2.0
Input Current
±2
V
= 0V to V
IN CC
DRIVER OUTPUTS
Differential Voltage
5
Volts
Volts
Volts
Volts
IO = 0; unloaded
2
1.5
RL = 50Ω(RS-422)
RL = 27Ω (RS-485); Fig. 1
RL = 27Ω or 50Ω ; Fig. 1
2
5
0.2
Change in Output Magnitude
for Complementary Output State
Common Mode Output Voltage
Change in Common Mode Output Magnitude
for Complementary Output State
2.3
3
0.2
Volts
Volts
RL = 27Ω or 50Ω; Fig. 1
RL = 27Ω or 50Ω; Fig. 1
RL = 50Ω (RS-422)
RL = 27Ω (RS-485)
Maximum Data Rate
10
Mbps
Short–circuit Current
VOH
VOL
±250
±250
±200
mA
mA
µA
–7V ≤VO ≤ +10V
–7V ≤VO ≤ +10V
VO = –7V to +10V
High Impedance Output Current
±2
POWER REQUIREMENTS
Supply Voltage
Supply Current
4.75
5.00
0.5
5.25
10
Volts
µA
No load, output enabled
No load, output disabled
0.5
10
µA
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
–C
–E
0
–40
–65
+70
+85
+150
°C
°C
°C
Storage Temperature
Package
–_S
16–pin Plastic DIP
16–pin SOIC
–_T
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
2
PINOUT — SP486
DI1
DO1A
DO1B
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
SP486
4
S1
S2
1
DI4
VCC
500 ohms
OUTPUT
UNDER TEST
DO4A
DO4B
EN
CL
DO2B
DO2A
DI2
DO3B
DO3A
DI3
2
Figure 3. Driver Timing Test Load
3
GND
Pin 8 — GND — Digital Ground.
SP486 PINOUT
Pin 9— DI3 — Driver3 Input — IfDriver3output is
enabled,logic0onDI3 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI3 withDriver33output
enabled3forces driver DO3A high and DO3B low.
Pin1— DI1 —Driver 1Input— IfDriver1 outputis
enabled,logic0onDI1 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI1 withDriver11output
enabled1forces driver DO1A high and DO1B low.
Pin 10 — DO3A — Driver 3 output A.
Pin 11 — DO3B — Driver 3 output B.
Pin 2 — DO1A — Driver 1 output A.
Pin 3 — DO1B — Driver 1 output B.
Pin 12 — EN — Driver Output Disable. Please refer
to SP486 Truth Table (1).
Pin 4 — EN — Driver Output Enable. Please refer to
SP486 Truth Table (1).
Pin 13 — DO4B — Driver 4 output B.
Pin 14 — DO4A — Driver 4 output A.
Pin 5 — DO2B — Driver 2 output B.
Pin 6 — DO2A — Driver 2 output A.
Pin 15 — DI4 — Driver 4 Input — If Driver 4 output
is enabled, logic 0 on DI4 forces driver output DO4A
low and DO B high. A logic 1 on DI4 with Driver 3
output enabl4ed forces driver DO4A high and DO4B
low.
Pin7— DI2 —Driver 2Input— IfDriver2 outputis
enabled,logic0onDI2 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI2 withDriver22output
enabled2forces driver DO2A high and DO2B low.
A
EN
CL1
R
A
VDO
DRIVER
RDIFF
DI
R
VOC
B
CL2
B
EN
Figure 1. Driver DC Test Load
Figure 2. Driver Timing Test
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
3
PINOUT — SP487
INPUT
DI
ENABLES
OUTPUTS
EN
EN
X
OUTA
OUTB
DI1
DO1A
DO1B
EN1/EN2
DO2B
DO2A
DI2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
SP487
4
H
L
H
H
X
X
L
H
L
L
H
1
DI4
X
DO4A
DO4B
EN3/EN4
DO3B
DO3A
DI3
H
L
L
H
L
L
L
H
X
H
Hi–Z
Hi–Z
Table 1. SP486 Truth Table
2
3
GND
Pin 11 — DO3B — Driver 3 output B.
Pin 12 — EN3/EN4 — Driver 3 and 4 Output Enable.
Please refer to SP487 Truth Table (2).
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
5.25V.
≤
Pin 13 — DO4B — Driver 4 output B.
Pin 14 — DO4A — Driver 4 output A.
SP487 PINOUT
Pin1— DI1 —Driver 1Input —IfDriver1 outputis
enabled,logic0onDI1 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI1 withDriver11output
enabled1forces driver DO1A high and DO1B low.
Pin 15 — DI4 — Driver 4 Input — If Driver 4 output
is enabled, logic 0 on DI4 forces driver output DO4A
low and DO B high. A logic 1 on DI4 with Driver 3
output enabl4ed forces driver DO4A high and DO4B
low.
Pin 2 — DO1A — Driver 1 output A.
Pin 3 — DO1B — Driver 1 output B.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
5.25V.
≤
FEATURES…
Pin 4 — EN1/EN2 — Driver 1 and 2 Output Enable.
Please refer to SP487 Truth Table (2).
TheSP486andSP487arelow–powerquaddiffer-
ential line drivers meeting RS-485 and RS-422
standards. The SP486 features active high and
active low common driver enable controls; the
SP487 provides independent, active high driver
enable controls for each pair of drivers. The driver
outputs are short–circuit limited to 200mA. Data
rates up to 10Mbps are supported. Both are avail-
able in 16–pin plastic DIP and SOIC packages.
Pin 5 — DO2B — Driver 2 output B.
Pin 6 — DO2A — Driver 2 output A.
Pin7— DI2 —Driver 2Input —IfDriver2 outputis
enabled,logic0onDI2 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI2 withDriver22output
enabled2forces driver DO2A high and DO2B low.
Pin 8 — GND — Digital Ground.
INPUT
ENABLES
OUTPUTS
DI
EN1/EN2 or EN3/EN4 OUTA
OUTB
L
Pin9— DI3 —Driver 3Input —IfDriver3 outputis
enabled,logic0onDI3 forcesdriveroutputDO Alow
andDO Bhigh. Alogic1onDI3 withDriver33output
enabled3forces driver DO3A high and DO3B low.
H
L
H
H
L
H
L
H
X
Hi–Z
Hi–Z
Pin 10 — DO3A — Driver 3 output A.
Table 2. SP487 Truth Table
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
4
F = 1MHZ: tr < 10ns: tf < 10ns
1.5V
3V
0V
DI
1.5V
tPLH
tPHL
B
A
VO
21VO
21VO
tSKEW
tSKEW
VDIFF = V(A) – V(B)
90%
10%
VO
90%
10%
–VO
tr
tf
Figure 4. Driver Propagation Delays
AC PARAMETERS
VCC = 5V±5%; typicals at 25°C; 0°C ≤ TA ≤ +70°C unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNIT
CONDITIONS
PROPAGATION DELAY
Driver Input to Output
RDIFF = 54 Ohms, CL1= CL2=
100pF; Figure 2
Low to High (tPLH
High to Low (tPHL
Driver Output to Output (tSKEW
Driver Rise Time (tR)
SP486
)
)
20
20
40
40
5
60
60
15
ns
ns
ns
)
10% to 90%
90% to 10%
20
20
ns
ns
SP487
Driver Fall Time (tF)
SP486
20
20
ns
ns
SP487
DRIVER ENABLE
To Output High
60
60
110
115
ns
ns
CL = 100pF; Figures 3 and 5
(S2 closed)
CL = 100pF; Figures 3 and 5
(S1 closed)
To Output Low
DRIVER DISABLE
From Output Low
60
60
130
130
ns
ns
CL = 15pF; Figures 3 and 5
(S1 closed)
CL = 15pF; Figures 3 and 5
(S2 closed)
From Output High
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
5
F = 1MHZ: tr < 10ns: tf < 10ns
1.5V
3V
0V
EN
1.5V
tZL
tLZ
5V
A, B
VO
2.3V
0.5V
0.5V
VOL
Output normally low
Output normally high
2.3V
VOH
0V
tZH
tHZ
Figure 5. Driver Enable/Disable Timing
ORDERING INFORMATION
Quad RS485 Drivers:
Model .................................. Enable/Disable ........................ Temperature Range ......................... Package
SP486CS .......... Common; active Low and Active High ............ 0°C to +70°C ..................16–pin Plastic DIP
SP486CT .......... Common; active Low and Active High ............ 0°C to +70°C ........................... 16–pin SOIC
SP486ES .......... Common; active Low and Active High .......... –40°C to +85°C................16–pin Plastic DIP
SP486ET .......... Common; active Low and Active High .......... –40°C to +85°C......................... 16–pin SOIC
SP487CS ............... One per driver pair; active High ................. 0°C to +70°C ..................16–pin Plastic DIP
SP487CT ............... One per driver pair; active High ................. 0°C to +70°C ........................... 16–pin SOIC
SP487ES ............... One per driver pair; active High ............... –40°C to +85°C................16–pin Plastic DIP
SP487ET ............... One per driver pair; active High ............... –40°C to +85°C......................... 16–pin SOIC
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
6
Co rp o ra tio n
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.
SP486/487
Quad RS-485/RS-422 Line Drivers
© Copyright 2000 Sipex Corporation
7
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