View SP3483_151503.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
SP3483 +3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver
s s s s s s s s s s RS-485 and RS-422 Transceiver Operates from a single +3.3V supply Interoperable with +5.0V logic Driver/Receiver Enable Low Power Shutdown Mode -7V to +12V Common-Mode Input Voltage Range Allows up to 32 transceivers on the serial bus Compatibility with the industry standard 75176 pinout Driver Output Short-Circuit Protection Slew Rate Limited Driver for Low EMI (SP3483)
DESCRIPTION The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin compatible with the Sipex SP483 device as well as popular industry standards. The SP3483 features Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The SP3483 is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps.
RO 1 RE 2 DE 3 DI 4
R
8 Vcc 7B 6A
D
SP3483
5 GND
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings 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........................................................-0.3V to (VCC+0.5V) Drivers..................................................-0.3V to (VCC+0.5V) Receivers................................................................. 15V Output Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers...................................................................... 15V Receivers............................................-0.3V to (VCC+0.5V) Storage Temperature.......................................................-65C to +150C Power Dissipation per package 8-pin NSOIC (derate 6.14mW/C above +70C).........................500mW 8-pin PDIP (derate 11.8mW/C above +70C)..........................1000mW
SPECIFICATIONS
TMIN to TMAX and VCC = +3.3V 5% unless otherwise noted.
PARAMETERS DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND 2
VCC VCC VCC 0.2 3 0.8 10 250 250
Volts Volts Volts Volts Volts Volts Volts A mA mA
Unloaded; R = ; Figure 1 with load; R = 50; (RS-422); Figure 1 with load; R = 27; (RS-485); Figure 1 R = 27 or R = 50; Figure 1 R = 27 or R = 50; Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE -7V VO +12V -7V VO +12V
Differential Output Voltage 1.5 Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage 2.0 Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW DRIVER AC Characteristics Maximum Data Rate 250 Driver Input to Output, tPLH Driver Input to Output, tPHL 400 400 900 900 10 700 700 690 80 90
kbps 1500 1500 1000 1300 1300 120 120 ns ns ns ns ns ns ns ns
RE = VCC, DE = VCC
Figures 2 and 8 Figures 2 and 8
tDO1 - tDO2 Figures 2 and 9 From 10% to 90% Figures 3 and 9 Figures 4 and 10 Figures 5 and 10 Figures 5 and 10 Figures 4 and 10
Differential Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High RECEIVER DC Characteristics Differential Input Threshold -0.2 Input Hysteresis Output Voltage High VCC-0.4 Output Voltage Low Three-State (High Impedance) Output Current Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 7
+0.2 20 0.4 +1 15 1.0 -0.8 60
Volts mV Volts Volts A k mA mA mA
-7V VCM +12V VCM = 0V VID = +200mV, -1.5mA VID = -200mV, 2.5mA 0V VO VCC; RE = VCC -7V VCM +12V DE = 0V, VCC = 0V or 3.6V, VIN = 12V DE = 0V, VCC = 0V or 3.6V, VIN = -7V 0V VCM VCC
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
2
SPECIFICATIONS (continued)
TMIN to TMAX and VCC = +3.3V 5% unless otherwise noted.
PARAMETERS RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output, tPLH Receiver Input to Output, tPHL Differential Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High
MIN.
TYP.
MAX.
UNITS
CONDITIONS
250 35 35
70 70 50 45 45 45 45
120 120
kbps ns ns ns
RE = 0V, DE = 0V Figures 6 and 11
Figures 6 and 11
tRSKEW = tRPHL - tRPLH Figures 6 and 11
70 70 70 70
ns ns ns ns
Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open
Shutdown Timing Time to Shutdown Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low POWER REQUIREMENTS Supply Current No Load Shutdown Mode
50
200
600 2000 2000 2500 2500
ns ns ns ns ns
RE = 5V, DE = 0V
Figures 4 and 10 Figures 5 and 10 Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open
350 250
650 10
A A A
RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or VCC; DE = 0V DE = 0V, RE=VCC
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
3
PIN FUNCTION
Pin 1 - RO - Receiver Output.
RO 1
R
8
VCC
Pin 2 - RE - Receiver Output Enable Active LOW. Pin 3 - DE - Driver Output Enable Active HIGH.
RE 2
7
B
Pin 4 - DI - Driver Input. Pin 5 - GND - Ground Connection. Pin 6 - A - Driver Output/Receiver Input Non-inverting. Pin 7 - B - Driver Output/Receiver Input Inverting. Pin 8 - Vcc - Positive Supply +3.00V < VCC < +3.60V
DE 3
6
A
D
DI 4
SP485
Top View
5
GND
SP3483 Pinout (Top View)
DESCRIPTION The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. The device is pin-to-pin compatible with the Sipex SP483 device as well as popular industry standards. The SP3483 features Sipex's BiCMOS process allowing low power operation without sacrificing performance. Drivers The driver outputs of the SP3483 are differential outputs meeting the RS-485 and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to +3.3 Volts. With a loading of 54 across the differential outputs, the drivers maintain greater than 1.5V voltage levels. The drivers have an enable control line which is active HIGH. A logic HIGH on DE (pin 3) will enable the differential driver outputs. A logic LOW on DE (pin 3) will force the driver outputs into high impedance (high-Z). The SP3483 has internally slew rate limited driver outputs to minimize EMI. The tranceivers will operate up to 250kbps. The 250mA ISC maximum limit on the driver output allows the SP3483 to withstand an infinite short circuit over the -7.0V to +12.0V common mode range without catastrophic damage to the IC.
Receivers The SP3483 receiver has differential inputs with an input sensitivity as low as 200mV. Input impedance of the receivers is typically 15k (12k minimum). A wide common mode range of -7V to +12V allows for large ground potential differences between systems. The receiver of the SP3483 has a high impedance (high-z) enable control pin. A logic LOW on RE (pin 2) will enable the receiver, a logic HIGH on RE (pin 2) will disable the receiver. The receiver of the SP3483 will operate up to 250kbps. The receiver is equipped with a fail-safe feature that guarantees the receiver output will be in a HIGH state when the input is left unconnected. Shutdown Mode The SP3483 is equipped with a Shutdown mode. To enable the Shutdown state, both the driver and receiver must be disabled simultaneously. A logic LOW on DE (pin 3) and a logic HIGH on RE (pin 2) will put the SP3483 into Shutdown mode. In Shutdown, supply current will drop to typical 1A, 10A maximum.
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
4
VDM
R
S1
RL = 27
D VCC
VOD R
GENERATOR (NOTE 1) 50
D
OUT CL = 15pF (NOTE 2)
VOC
VCC VOM = VOH + VOL 2
1.5V
Figure 1. Driver DC Test Load Circuit
Figure 2. Driver Propagation Delay Test Circuit
S1 D OUT CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50 RL = 110
CL D GENERATOR (NOTE 1) 50 VCC
RL = 60
OUT
CL = 15pF (NOTE 2)
VOM = VOH + VOL 2
1.5V
Figure 3. Driver Differential Output Delay and Transition Time Circuit
VCC RL = 110 S1 0V OR 3V D CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50 OUT
Figure 4. Driver Enable and Disable Timing Circuit, Output HIGH
VID
GENERATOR (NOTE 1)
R
OUT CL = 15pF (NOTE 2)
50
1.5V 0V VOM = VCC 2
Figure 5. Driver Enable and Disable Timing Circuit, Output LOW
Figure 6. Receiver Propagation Delay Test Circuit
1.5V -1.5V
S3 1k VID R
S1 VCC S2
CL = 15pF (NOTE 2)
GENERATOR (NOTE 1)
50
Figure 7. Receiver Enable and Disable Timing Circuit
INPUTS RE X X X DE 1 1 0 LINE DI CONDITION 1 No Fault 0 No Fault X X
OUTPUTS B 0 1 Z A 1 0 Z
INPUTS RE DE 0 0 0 0 0 0 1 0
OUTPUTS A-B R +0.2V 1 -0.2V 0 Inputs Open 1 X Z
(c) Copyright 2000 Sipex Corporation
Table 1. Transmit Function Truth Table
SP3483 DS/04
Table 2. Receive Function Truth Table
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
5
3V INPUT 0V VOH Y OUTPUT VOL tPHL VOH Z OUTPUT VOL
tTD tTD
1.5V tPLH VOM
1.5V tPHL VOM
IN 1.5V 1.5V
3V
0V tDO1 tDO2 2.0V 90% 50% 10% -2.0V
tPLH VOM VOM
OUT 50% 10%
90%
VOM = VOH + VOL 1.5V 2
Figure 8. Driver Propagation Delay Waveforms
Figure 9. Driver Differential Output Delay and Transition Time Waveforms
3V DE 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
3V INPUT 0V tRPLH VCC OUTPUT 0V VOM = VCC 2 VOM VOM tRPHL 1.5V 1.5V
Figure 10. Driver Enable and Disable Timing Waveforms
Figure 11. Receiver Propagation Delay Waveforms
S1 is open S2 is closed S3 = 1.5V 3V RE 0V tPRHZ VOH OUTPUT 0V 10% 1.5V tPRZH tPRSH
OUTPUT
VOL 3V
S1 is closed S2 is open S3 = -1.5V
1.5V
1.5V
RE
0V
1.5V tPRLZ VCC
1.5V tPRZL tPRSL 1.5V
10%
Figure 12. Receiver Enable and Disable Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics: PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50. NOTE 2: CL includes probe and stray capacitance.
SP3483 DS/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers (c) Copyright 2000 Sipex Corporation
6
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
8-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) 0.355/0.400 (9.017/10.160) 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)
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
7
PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW)
E
H
h x 45 D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H h L O
8-PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988) 0.050 BSC (1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0/8 (0/8)
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
8
ORDERING INFORMATION
Model Temperature Range Package SP3483CN .................................................................................... 0C to +70C ............................................................................ 8-pin Narrow SOIC SP3483CP .................................................................................... 0C to +70C ................................................................................ 8-pin Plastic DIP SP3483EN .................................................................................. .-40C to +85C .......................................................................... 8-pin Narrow SOIC SP3483EP ................................................................................... -40C to +85C .............................................................................. 8-pin Plastic DIP 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.
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
(c) Copyright 2000 Sipex Corporation
9

▲Up To Search▲

Price & Availability of SP3483

	To Download SP3483 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .