SP488ES-L/TR [SIPEX]
Line Driver/Receiver, PDIP16;
| 型号： | SP488ES-L/TR |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Driver/Receiver, PDIP16 光电二极管 |
| 文件： | 总6页 (文件大小：119K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP488/489
Quad RS-485/RS-422 Line Receivers
■ RS-485 or RS-422 Applications
■ Quad Differential Line Receivers
■ Tri–state Output Control
■ 120ns Typical Receiver Propagation
Delays
■ –7V to +12V Common Mode Input
Range
■ 1mA Supply Current
■ Single +5V Supply Operation
■ Pin Compatible with SN75173,
SN75175, LTC488 and LTC489
Now available in Lead Free
DESCRIPTION…
The SP488 and SP489 are low–power quad differential line receivers meeting RS-485 and RS-422
standards. The SP488 features a common receiver enable control; the SP489 provides independent
receiver enable controls for each pair of receivers. Both feature tri–state outputs and wide common–
mode input range. The receivers have a fail–safe feature which forces a logic “1” output when receiver
inputs are left floating. Both are available in 16–pin plastic DIP and SOIC packages.
RI1B
RI1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI1B
RI1A
RO1
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI4B
RI4A
RO4
EN
SP489
4
SP488
4
RI4B
RI4A
RO4
1
1
RO1
EN1/EN2
RO2
EN3/EN4
RO3
RO2
RI2A
RI2B
GND
2
RI2A
2
RO3
RI3A
RI3B
3
RI2B
RI3A
RI3B
3
GND
SP488/489
Quad RS-485/RS-422 Line Receivers
© 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)
Receiver ............................................................................... ±14V
Receiver Output Voltage ................................. –0.5V to (VCC +0.5V)
Input Currents
Logic .................................................................................. ±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
EN, EN, EN1/EN2, EN3/EN4
0.8
Volts
Volts
µA
VIH
2.0
Input Current
±2
0V ≤ VIN ≤ VCC
RECEIVER INPUTS
Input Resistance
Differential Input Threshold
Input Current (A, B)
12
–0.2
kOhm
Volts
–7V ≤ VCM ≤ 12V
–7V ≤ VCM ≤ 12V
VCC = 0V or 5.25V; IIN2
VIN = +12V
+0.2
+1.0
–0.8
mA
mA
VIN = –7V
Maximum Data Rate
10
Mbps
RECEIVER OUTPUTS
Output Voltage
VOH
VOL
3.5
V
V
µA
IO = –4mA; VID = +0.2V
IO = +4mA; VID = –0.2V
VCC = maximum; 0.4V ≤ VO ≤ 2.4V
0.4
±1
High Impedance Output Current
POWER REQUIREMENTS
Supply Voltage
Supply Current
4.75
5.00
1
5.25
5
Volts
mA
No load
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
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
2
100pF
EN
S1
S2
1kΩ
A
VCC
CL
DRIVER
RCVR
ROn
CL
DI
54Ω
1kΩ
B
100pF
EN
1/4 SP486
1/4 SP488
Figure 2. Enable/Disable Timing Test Circuit
Figure 1. Timing Test Circuit
SP488 PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 6 — RI2A — Receiver 2 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
Pin 9 — RI3B — Receiver 3 input B.
Pin 10 — RI3A — Receiver 3 input A.
Pin 2 — RI1A — Receiver 1 input A.
Pin 3 — RO1 — Receiver 1 Output — If Re-
ceiver 1 output is enabled, if RI1A > RI1B by
200mV, Receiver output is high. If Receiver 1
outputisenabled, andifRI A<RI1B by200mV,
Receiver 1 output is low.1
Pin 4 — EN — Receiver Output Enable. Please
refer to SP488 Truth Table (1).
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI A > RI3B by
200mV, Receiver 3 output is high.3If Receiver 3
output is enabled, and if RI3A < RI3B by
200mV, Receiver 3 output is low.
Pin 5 — RO2 — Receiver 2 Output — If Re-
ceiver 2 output is enabled, if RI2A > RI2B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
Pin12—EN—ReceiverOutputEnable. Please
refer to SP488 Truth Table (1).
PINOUT
RI1B
RI1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI1B
RI1A
RO1
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI4B
RI4A
RO4
EN
SP489
4
SP488
4
RI4B
RI4A
RO4
1
1
RO1
EN1/EN2
RO2
RO2
RI2A
RI2B
GND
EN3/EN4
RO3
2
2
RO3
RI3A
RI3B
RI2A
3
3
RI2B
RI3A
RI3B
GND
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
3
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI A > RI4B by
200mV, Receiver 4 output is high.4If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
Pin 9 — RI3B — Receiver 3 input B.
Pin 10 — RI3A — Receiver 3 input A.
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI A > RI3B by
200mV, Receiver 3 output is high.3If Receiver 3
output is enabled, and if RI3A < RI3B by
200mV, Receiver 3 output is low.
Pin 14 — RI4A — Receiver 4 input A.
Pin 15 — RI4B — Receiver 4 input B.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
5.25V.
≤
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP489 Truth Table (2).
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI A > RI4B by
200mV, Receiver 4 output is high.4If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
SP489 PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 2 — RI1A — Receiver 1 input A.
Pin 3 — RO1 — Receiver 1 Output — If Re-
ceiver 1 output is enabled, if RI > RI1B by
200mV, Receiver output is high.1IAf Receiver 1
outputisenabled, andifRI A<RI1B by200mV,
Receiver 1 output is low.1
Pin 14 — RI4A — Receiver 4 input A.
Pin 15 — RI4B — Receiver 4 input B.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
5.25V.
≤
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP489 Truth Table (2).
FEATURES…
Pin 5 — RO2 — Receiver 2 Output — If Re-
ceiver 2 output is enabled, if RI2A > RI2B by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
The SP488 and SP489 are low–power quad
differential line receivers meeting RS-485 and
RS-422 standards. The SP488 features active
high and active low common receiver enable
controls; the SP489 provides independent, ac-
tive high receiver enable controls for each pair
of receivers. Both feature tri–state outputs and a
-7V to +12V common–mode input range per-
mitting a ±7V ground difference between de-
vices on the communications bus. The SP488/
489 are equipped with a fail–safe feature which
forces a logic high at the receiver output when
theinputisleftfloating.Dataratesupto10Mbps
are supported. Both are available in 16-pin
plastic DIP and SOIC packages.
Pin 6 — RI2A — Receiver 2 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
DIFFERENTIAL
A – B
ENABLES
EN
OUTPUT
RO
EN
DIFFERENTIAL
A – B
ENABLES
EN /EN or EN /EN
4
OUTPUT
RO
V
ID ≥ 0.2V
H
X
X
L
H
H
1
2
3
V
≥ 0.2V
H
H
H
L
H
X
ID
–0.2V < VID < +0.2V
H
X
X
L
X
X
–0.2V < V < +0.2V
ID
V
ID ≤ 0.2V
H
X
X
L
L
L
V
≤ 0.2V
L
ID
X
Hi–Z
X
L
H
Hi–Z
Table 1. SP488 Truth Table
Table 2. SP489 Truth Table
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
4
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
Receiver Input to Output
Low to HIGH (tPLH)
High to LOW (tPHL)
Differential Receiver Skew (tSKD
Receiver Rise Time (tR)
SP488
SP489
Receiver Fall Time (tF)
SP488
CL = 15pF; Figure 1, 3
120
120
13
250
250
ns
ns
ns
)
10% to 90%
90% to 10%
30
30
70
70
ns
ns
20
20
40
40
ns
ns
SP489
RECEIVER ENABLE
To Output HIGH
70
80
150
200
ns
ns
CL = 15pF; Figures 2 and 4
(S2 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
To Output LOW
RECEIVER DISABLE
From Output LOW
70
70
150
150
ns
ns
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
From Output HIGH
F = 1MHZ: tr < 10ns: tf < 10ns
0V
+VOD
Input A–B
0V
–VOD
tPHL
tPLH
VOH
VOL
RO
1.5V
1.5V
Figure 3. Receiver Propagation Delays
F = 1MHZ: tr < 10ns: tf < 10ns
1.5V
3V
EN
1.5V
0V
tZL
tLZ
5V
RO
1.5V
0.5V
0.5V
VOL
Output normally low
tZH
tHZ
Output normally high
1.5V
VOH
0V
RO
Figure 4. Receiver Enable/Disable Timing
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
5
ORDERING INFORMATION
Quad RS485 Receivers:
Model ........................ Enable/Disable ...................................... Temperature Range........................ Package
SP488CS .................. Common; active Low and Active High .. 0°C to +70°C ....................16–pin Plastic DIP
SP488CT .................. Common; active Low and Active High .. 0°C to +70°C ............................. 16–pin SOIC
SP488ES .................. Common; active Low and Active High .. –40°C to +85°C ................16–pin Plastic DIP
SP488ET .................. Common; active Low and Active High .. –40°C to +85°C ......................... 16–pin SOIC
SP489CS .................. One per driver pair; active High ............ 0°C to +70°C ....................16–pin Plastic DIP
SP489CT .................. One per driver pair; active High ............ 0°C to +70°C ............................. 16–pin SOIC
SP489ES .................. One per driver pair; active High ............ –40°C to +85°C ................16–pin Plastic DIP
SP489ET .................. One per driver pair; active High ............ –40°C to +85°C ......................... 16–pin SOIC
Now available in Lead Free. To order ad "-L" to the part number.
Example: SP488/TR= Normal, SP488TR-L = Lead Free
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.
SP488/489
Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
6
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