Datasheet SP481EN, SP481ES, SP483CN, SP483CS, SP481CN Datasheet (Sipex Corporation)

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Page 1

SP481/SP483/SP485

Low Power Half-Duplex RS-485 Transceivers

■ +5V Only

■ Low Power BiCMOS

■ Driver/Receiver Enable

■ Slew Rate Limited Driver for

Low EMI (SP483)

■ Low Power Shutdown Mode (SP481 and SP483)

■ RS-485 and RS-422 Drivers/Receivers

DESCRIPTION

The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485 and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power Shutdown mode.

SP481, SP483, and SP485

Vcc

GND

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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............................................................................................................±12V

Input Voltages

Output Voltages

Storage Temperature.......................................................-65˚C to +150˚C

Power Dissipation...........................................................................500mW

Logic........................................................-0.3V to (VCC+0.5V)

Drivers..................................................-0.3V to (VCC+0.5V)

Receivers................................................................. ±15V

Logic........................................................-0.3V to (VCC+0.5V)

Drivers...................................................................... ±15V

Receivers............................................-0.3V to (VCC+0.5V)

SPECIFICATIONS

to T

and VCC = 5V ± 5% unless otherwise noted.

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481/SP483/SP485 DRIVER

DC Characteristics

Differential Output Voltage GND V Differential Output Voltage 2 V

Differential Output Voltage 1.5 V Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; Driver Common-Mode Output Voltage 3 Volts R = 27Ω or R = 50Ω; Input High Voltage 2.0 Volts Applies to DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current ±10 µA Applies to DE, DI, RE Driver Short-Circuit Current V

= HIGH 35 250 mA -7V ≤ VO ≤ +12V

OUT

= LOW 35 250 mA -7V ≤ VO ≤ +12V

OUT

SP481/SP485 DRIVER AC Characteristics

Maximum Data Rate 5 Mbps RE = 5V, DE = 5V Driver Input to Output 20 30 60 ns t

Driver Input to Output 20 30 60 ns t Driver Skew 5 10 ns Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R Driver Enable to Output High 40 70 ns C

Driver Enable to Output Low 40 70 ns C Driver Disable Time from Low 40 70 ns C Driver Disable Time from High 40 70 ns C

SP481/SP483/SP485

RECEIVER

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V ≤ V Input Hysteresis 10 mV VCM = 0V Output Voltage High 3.5 Volts IO = -4mA, VID = +200mV Output Voltage Low 0.4 Volts IO = +4mA, VID = -200mV Three-State (High Impedance) Output Current ±1 µA 0.4V ≤ VO ≤ 2.4V; RE = 5V Input Resistance 12 15 kΩ -7V ≤ V Input Current (A, B); VIN = 12V +1.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V Short-Circuit Current 7 95 mA 0V ≤ VCM ≤ V

Volts Unloaded; R = ∞ ;

Volts with load; R = 50Ω; (RS422);

Volts with load; R = 27Ω; (RS485);

see figure 1

; R

PLH

see figures 3 and 6

PHL

see figures 3 and 6

= 54Ω, CL1 = CL2 = 100pF;

DIFF

; R

= 54Ω, CL1 = CL2 = 100pF;

DIFF

see figures 3 and 6,

= | t

SKEW

CL1 = C

= 100pF;

= 15pF;

- t

DPLH

= 100pF;

see figures 4 & 7; see figures 4 & 7;

see figures 2 & 9;

≤ +12V

see figure 1

see figure 1 see figure 1

DPHL

= 54Ω,

DIFF

see figures 3 and 6

S2 closed

S1 closed S1 closed S2 closed

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SPECIFICATIONS (continued)

to T

and VCC = 5V ± 5% unless otherwise noted.

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP481/SP485 RECEIVER

AC Characteristics

Maximum Data Rate 5 Mbps RE = 0V, DE = 0V Receiver Input to Output 60 90 200 ns t

Receiver Input to Output 60 90 200 ns t Diff. Receiver Skew It

I 13 ns R

PLH-tPHL

Receiver Enable to Output Low 20 50 ns C Receiver Enable to Output High 20 50 ns C Receiver Disable from Low 20 50 ns C Receiver Disable from High 20 50 ns C

SP481

Shutdown Timing

Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 40 100 ns CL = 100pF; Driver Enable from Shutdown to Output Low 40 100 ns CL = 100pF; Receiver Enable from Shutdown to Output High 300 1000 ns CL = 15pF; Receiver Enable from Shutdown to Output Low 300 1000 ns CL = 15pF;

; R

PLH

DIFF

CL1 = C

; R

PHL

DIFF

CL1 = C

= 54Ω; C

DIFF

Figures 3 & 8

= 15pF;

= 100pF;

Figures 2 & 9;

= 54Ω, = 54Ω,

Figures 3 & 8

100pF;

Figures 3 & 8

= C

= 100pF;

Figures 2 & 9;

Figures 2 & 9; Figures 2 & 9;

S1 closed

S2 closed S1 closed S2 closed

See figures 4 & 7;

See figures 4 & 7; See figures 2 & 9; See figures 2 & 9;

S2 closed S1 closed

S2 closed

S1 closed

POWER REQUIREMENTS

Supply Voltage +4.75 +5.25 Volts Supply Current

SP481/485

No Load 900 mA RE, DI = 0V or VCC; DE = V

µA RE = 0V, DI = 0V or 5V; DE = 0V

SP483

No Load 600 µA RE, DI = 0V or VCC; DE = V

µA RE=0V, DI = 0V or 5V; DE = 0V

SP481/SP483 Shutdown Mode 10 µA DE = 0V, RE=V

ENVIRONMENTAL AND

MECHANICAL

Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C Storage Temperature -65 +150 °C Package Plastic DIP (_S) NSOIC (_N)

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SP483 AC SPECIFICATIONS

to T

and VCC = 5V ± 5% unless otherwise noted.

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483 DRIVER AC Characteristics

Maximum Data Rate 250 kbps Driver Input to Output 250 800 2000 ns t

Driver Skew 250 800 2000 ns t Driver Rise and Fall Time 100 800 ns

250 2000 ns From 10% to 90%; R

Driver Enable to Output High 250 2000 ns CL = 100pF; Driver Enable to Output Low 250 2000 ns CL = 100pF; Driver Disable Time from Low 300 3000 ns CL = 15pF; Driver Disable Time from High 300 3000 ns CL = 15pF;

SP483 RECEIVER AC Characteristics

Maximum Data Rate 250 kbps Receiver Input to Output 250 2000 ns t

Diff. Receiver Skew It

I 100 ns R

PLH-tPHL

Receiver Enable to Output Low 20 50 ns C Receiver Enable to Output High 20 50 ns C Receiver Disable from Low 20 50 ns C Receiver Disable from High 20 50 ns C

; R

PLH

see figures 3 & 6

; R

PHL

see figures 3 & 6 see figures 3 & 6,

= |t

SKEW

CL1 = CL2 = 100pF,

; R

PLH

Figures 3 & 8

= 54Ω, CL1 = C

DIFF

Figures 3 & 8

= 15pF;

= 54Ω, CL1 = C

DIFF

= 54Ω, CL1 = C

DIFF

- t

DPLH

DPHL

See figures 4 & 7;

See figures 4 & 7; See figures 4 & 7; See figures 4 & 7;

= 54Ω, CL1 = C

DIFF

Figures 2 & 9;

Figures 2 & 9; Figures 2 & 9;

100pF;

= 54Ω,

DIFF

see figures 3 & 6

S2 closed

S1 closed S1 closed S2 closed

= 100pF;

S1 closed

S2 closed S1 closed S2 closed

SP483 Shutdown Timing

Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 2000 ns CL = 100pF;

See figures 4 & 7;

S2 closed

Driver Enable from Shutdown to Output Low 2000 ns CL = 100pF;

See figures 4 & 7;

S1 closed Receiver Enable from Shutdown to Output High 2500 ns CL = 15pF;

See figures 4 & 7;

S2 closed Receiver Enable from Shutdown to Output Low 2500 ns CL = 15pF;

See figures 4 & 7;

S1 closed

PIN FUNCTION

RO 1

RE 2

DE 3

DI 4

SP485

8 V

7 B

6 A

5 GND

Top View

SP481, SP483, SP485

Pinout (Top View)

Pin# Name Description

1 RO Receiver Output. 2 RE Receiver Output Enable

Active LOW.

3 DE Driver Output Enable

Active HIGH. 4 DI Driver Input. 5 GND Ground Connection. 6 A Driver Output/Receiver Input

Non-inverting. 7 B Driver Output/Receiver Input

Inverting. 8 Vcc Positive Supply 4.75V<Vcc< 5.25V.

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DESCRIPTION SP481, SP483, SP485

Receivers SP481, SP483, SP485

The SP481, SP483, and SP485 are half-duplex differential transceivers that meet the requirements of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, all three products require a fraction of the power of older bipolar designs.

The RS-485 standard is ideal for multi-drop applications and 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 accommodate ground potential differences. Because RS-485 is a differential interface, data is virtually immune to noise in the transmission line.

Drivers SP481, SP483, SP485

The driver outputs of the SP481, SP483, and SP485 are differential outputs meeting the RS-

485 and RS-422 standards. The typical voltage output swing with no load will be 0 volts to +5 volts. With worst case loading of 54Ω across the differential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers of the SP481, SP483 and SP485 have an enable control line which is active HIGH. A logic HIGH on DE (pin 5) will enable the differential driver outputs. A logic LOW on DE (pin 5) will tri-state the driver outputs.

The SP481, SP483, and SP485 receivers have differential inputs with an input sensitivity as low as ±200mV. 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. The receivers of the SP481, SP483 and SP485 have a tri-state enable control pin. A logic LOW on RE (pin 4) will enable the receiver, a logic HIGH on RE (pin 4) will disable the receiver.

The receiver for the SP481 and SP485 will operate up to at least 5Mbps. The SP483 receiver is rated for data rates up to 250kbps. The receiver for each of the three devices is equipped with the fail-safe feature. Fail-safe guarantees that the receiver output will be in a HIGH state when the input is left unconnected.

Shutdown Mode SP481/SP483

The SP481 and SP483 are 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 5) and a logic HIGH on RE (pin 4) will put the SP481 or SP483 into Shutdown mode. In Shutdown, supply current will drop to typically 1µA.

The transmitters of the SP481 and SP485 will operate up to at least 5Mbps. The SP483 has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the SP483 driver is 250kbps.

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Receiver

Output

1KTest Point

Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit

A B

DIFF

A B

15pF

Output

Under

Test

500

Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit

+3V

DRIVER

OUTPUT

DIFFERENTIAL

OUTPUT

VA – V

SKEW = | tDPLH - tDPHL |

Figure 6. Driver Propagation Delays

B A

–

SP481/485 =

1MHz; f

1.5V 1.5V

1/2V

INPUTS OUTPUTS

LINE

RE DE DI CONDITION B A

X 1 1 No Fault 0 1 X 1 0 No Fault 1 0 X0X X ZZ X 1 X Fault Z Z

Table 1. Transmit Function Truth Table

100kHz ; tR < 10ns; tF < 10ns

SP483 =

PLH

DPLH

PHL

DPHL

INPUTS OUTPUTS

RE DE A - B R

0 0 +0.2V 1 0 0 -0.2V 0 0 0 Inputs Open 1 10 X Z

Table 2. Receive Function Truth Table

1/2V

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SP481/485

= 1MHz; f

= 100kHz; tR < 10ns; tF < 10ns

SP483

+3V

1.5V 1.5V

0V 5V

A, B

Figure 7. Driver Enable and Disable Times

0D2

A – B

SKEW = | tPHL - tPLH

–

0D2

PHL

SP481/485

2.3V

Output normally LOW

Output normally HIGH

0V 0V

1.5V 1.5V

= 1MHz; f

INPUT

OUTPUT

PLH

= 100kHz; tR < 10ns; tF < 10ns

SP483

0.5V

Figure 8. Receiver Propagation Delays

SP481/485

= 1MHz; f

= 100kHz; tR < 10ns; tF < 10ns

SP483

+3V

1.5V 1.5V t

Figure 9. Receiver Enable and Disable Times

1.5V

Output normally LOW

Output normally HIGH

0.5V

0.5V t

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PACKAGE: PLASTIC

SMALL OUTLINE (SOIC) (NARROW)

h x 45°

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

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)

8–PIN

0°/8°

(0°/8°)

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D1 = 0.005" min.

(0.127 min.)

e = 0.100 BSC

(2.540 BSC)

ALTERNATE

END PINS

(BOTH ENDS)

PACKAGE: PLASTIC

DUAL–IN–LINE (NARROW)

A1 = 0.015" min.

(0.381min.)

A = 0.210" max.

(5.334 max).

eA = 0.300 BSC

(7.620 BSC)

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

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°)

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ORDERING INFORMATION

Model Temperature Range Package

SP481CN...................................................................................... 0˚C to +70˚C .......................................................................... 8-pin Narrow SOIC

SP481CS ...................................................................................... 0˚C to +70˚C ............................................................................8-pin Plastic DIP

SP481EN .................................................................................... .-40˚C to +85˚C ........................................................................ 8-pin Narrow SOIC

SP481ES .....................................................................................-40˚C to +85˚C ..........................................................................8-pin Plastic DIP

SP483CN...................................................................................... 0˚C to +70˚C .......................................................................... 8-pin Narrow SOIC

SP483CS ...................................................................................... 0˚C to +70˚C ............................................................................8-pin Plastic DIP

SP483EN ..................................................................................... -40˚C to +85˚C ........................................................................ 8-pin Narrow SOIC

SP483ES .....................................................................................-40˚C to +85˚C ..........................................................................8-pin Plastic DIP

SP485CN...................................................................................... 0˚C to +70˚C .......................................................................... 8-pin Narrow SOIC

SP485CS ...................................................................................... 0˚C to +70˚C ............................................................................8-pin Plastic DIP

SP485EN ..................................................................................... -40˚C to +85˚C ........................................................................ 8-pin Narrow SOIC

SP485ES .....................................................................................-40˚C to +85˚C ..........................................................................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: [email protected]

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.