SP3488CT/TR [SIPEX]
Line Receiver, 4 Func, 4 Rcvr, BICMOS, PDSO16, PLASTIC, SOIC-16;
| 型号： | SP3488CT/TR |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Receiver, 4 Func, 4 Rcvr, BICMOS, PDSO16, PLASTIC, SOIC-16 |
| 文件： | 总9页 (文件大小：117K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP3488 and SP3489
+3.3V Low Power Quad
RS-485/RS-422 Line Receivers
■ RS-485 or RS-422 Quad Differential
Line Receivers
■ 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
(SP3488)
■ Independent Driver Enable Controls
for each pair of Drivers (SP3489)
■ Compatibility with LTC488
and SN75173 (SP3488)
■ Compatibility with LTC489
and SN75175 (SP3489)
DESCRIPTION…
The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the
specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin
compatible with Sipex's SP488 and SP489 devices as well as popular industry standards.
The SP3488 and SP3489 feature Sipex's BiCMOS process allowing low power operation
without sacrificing performance. The SP3488 and SP3489 meet the electrical specifications
of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3488 features a
common receiver enable control. The SP3489 provides independent receiver enable
controls for each pair of receivers. Both devices feature tri-state outputs and a -7V to +12V
common-mode input range. The receivers have a fail-safe feature which forces a logic "1"
output when receiver inputs are left floating.
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
SP3489
4
SP3488
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
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 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 ......................................................................................... +6.0V
Input Voltages
Logic ...................................................................... –0.3V to +6.0V
Receiver ............................................................................... ±14V
Receiver Output Voltage .......................................... –0.3V to +6.0V
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 = +3.3V±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
kΩ
Volts
-7V ≤ VCM ≤ 12V
-7V ≤ VCM ≤ 12V
VCC = 0V or 3.3V; IIN2
VIN = +12V
+0.2
+1.0
-0.8
mA
mA
VIN = –7V
Maximum Data Rate
10
Mbps
RECEIVER OUTPUTS
Output Voltage
VOH
VOL
VCC-0.4
V
V
µA
IO = -1.5mA; VID = +0.2V
IO = +2.5mA; VID = -0.2V
VCC = maximum; 0.4V ≤ VO ≤ VCC
0.4
±1
High Impedance Output Current
POWER REQUIREMENTS
Supply Current
2.2
5
mA
No load
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
–C
–E
0
-40
-65
+70
+85
+150
°C
°C
°C
Storage Temperature
Package
–_P
16–pin Plastic DIP
16–pin SOIC
–_T
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
2
15pF
EN
S1
S2
1kΩ
A
VCC
DRIVER
RCVR
ROn
CL
CL
DI
54Ω
1kΩ
B
15pF
EN
1/4 SP3486
1/4 SP3488
Figure 2. Enable/Disable Timing Test Circuit
Figure 1. Timing Test Circuit
SP3488 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 SP3488 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 SP3488 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
SP3489
4
SP3488
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
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 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 — VCC — Positive Supply +3.00V < VCC
< +3.60V
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP3489 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.
SP3489 PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 2 — RI1A — Receiver 1 input A.
Pin 3 — RO1 — Receiver 1 Output — If
Receiver 1 output is enabled, if RI1A > RI B by
200mV, Receiver output is high. If Rece1iver 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 — VCC — Positive Supply +3.00V < VCC
< +3.60V
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP3489 Truth Table (2).
FEATURES...
The SP3488 and the SP3489 are +3.3V low
power quad line receivers that meet the
specifications of the RS-485 and RS-422 serial
protocols. These devices are pin-to-pin
compatible with Sipex's SP488 and SP489
devices as well as popular industry standards.
The SP3488 and SP3489 devices feature
Sipex's BiCMOS process allowing low power
operation without sacrificing performance.
Pin 5 — RO2 — Receiver 2 Output — If
Receiver 2 output is enabled, if RI A > RI2B by
200mV, Receiver 2 output is high.2If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
Pin 6 — RI2A — Receiver 2 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
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
DIFFERENTIAL
A – B
ENABLES
EN
OUTPUT
RO
EN
DIFFERENTIAL
A – B
ENABLES
EN /EN or EN /EN
4
OUTPUT
RO
VID ≥ 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
VID ≤ 0.2V
H
X
X
L
L
L
V
ID
≤ 0.2V
L
X
Hi–Z
X
L
H
Hi–Z
Table 1. SP3488 Truth Table
Table 2. SP3489 Truth Table
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
4
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. Because the
RS-485 protocol is a differential interface, data
is virtually immune to noise in the transmission
line.
The SP3488 features active HIGH and active
LOW common receiver enable controls. Refer
to SP3488 Truth Table in Table 1. The SP3489
provides independent, active high receiver
enable controls for each pair of receivers. Refer
to SP3489 Truth Table in Table 2. Both devices
feature tri-state outputs and a -7V to +12V
common-mode input range permitting a +7V
ground difference between devices on the
communicationbus.TheSP3488andtheSP3489
areequippedwithafail-safefeaturewhichforces
a logic HIGH at the receiver output when the
input is left floating. The SP3488 and SP3489
receivers meet the electrical specifications of
RS-485 and RS-422 serial protocol data rates up
to 10Mbps under load.
Receiver...
The SP3488 and the SP3489 receivers have
differential inputs with an input sensitivity
as low as +100mV. Input impedance of the
receivers is typically 15KΩ (12KΩ minimum).
A wide common mode range of -7V to +12V
allows for large ground potential differences
between systems.
AC PARAMETERS
VCC = +3.3V±5%; typicals at 25°C; TAMB = 25°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)
SP3488
SP3489
Receiver Fall Time (tF)
SP3488
CL = 15pF; Figure 1, 3
75
80
4
115
115
ns
ns
ns
)
10% to 90%
90% to 10%
7
7
15
15
ns
ns
6
6
15
15
ns
ns
SP3489
RECEIVER ENABLE
To Output HIGH
46
46
100
100
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
46
46
100
100
ns
ns
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
From Output HIGH
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
5
F = 1MHZ: tr < 10ns: tf < 10ns
0V
+VOD
–VOD
Input A–B
0V
tPHL
tPLH
VOH
RO
1.5V
1.5V
VOL
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
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
6
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
Ø
L
B1
B
e
= 0.300 BSC
(7.620 BSC)
e = 0.100 BSC
(2.540 BSC)
A
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
0.115/0.195
(2.921/4.953)
A2
0.014/0.022
(0.356/0.559)
B
0.045/0.070
B1
C
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.780/0.800
(19.812/20.320)
D
0.300/0.325
(7.620/8.255)
E
0.240/0.280
E1
L
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
Ø
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
7
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
E
H
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
A
A1
B
D
E
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)
e
0.050 BSC
(1.270 BSC)
H
L
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
8
ORDERING INFORMATION
Quad RS485 Receivers:
Model .................................... Enable/Disable ........................................................... Temperature Range ................................................ Package
SP3488CP ........................... Common; active Low and Active High ...................... 0°C to +70°C ........................................... 16–pin Plastic DIP
SP3488CT ............................ Common; active Low and Active High ...................... 0°C to +70°C .................................................... 16–pin SOIC
SP3488EP ............................ Common; active Low and Active High ...................... –40°C to +85°C ....................................... 16–pin Plastic DIP
SP3488ET ............................ Common; active Low and Active High ...................... –40°C to +85°C ................................................ 16–pin SOIC
SP3489CP ........................... One per driver pair; active High ................................. 0°C to +70°C ........................................... 16–pin Plastic DIP
SP3489CT ............................ One per driver pair; active High ................................. 0°C to +70°C .................................................... 16–pin SOIC
SP3489EP ............................ One per driver pair; active High ................................. –40°C to +85°C ....................................... 16–pin Plastic DIP
SP3489ET ............................ 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.
Co rp o ra tio n
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.
10/16/02
SP3488/3489 Low Power Quad RS-485/422 Line Receivers
© Copyright 2002 Sipex Corporation
9
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