SP481, SP483, SP485 Datasheet. Www.s Manuals.com. 20040728 Sipex

User Manual: Datasheets SP485, SP485CN, SP485CN-L, SP485CS, SP485CS-L, SP485EN, SP485EN-L, SP485ES, SP485ES-L.

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SP481/SP483/SP485
Low Power Half-Duplex RS-485 Transceivers
FEATURES
■ +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

R

8

VCC

RE 2

7

B

DE 3

6

A

5

GND

RO 1

D
DI 4

SP485
Top View

SP481, SP483, SP485
Pinout (Top View)

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.

RO 1

R

8 Vcc

RE 2

7 B

DE 3

6 A

DI 4

D

5 GND

SP481, SP483, and SP485

Rev. 07/28/04

SP481/483/485 Low Power Half-Duplex RS485 Transceivers

1

© Copyright 2002 Sipex Corporation

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
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.......................................................-65˚C to +150˚C
Power Dissipation...........................................................................500mW

ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS
SP481/SP483/SP485 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage

MAX.

UNITS

CONDITIONS

GND
2

VCC
VCC

Volts
Volts

1.5

VCC

Volts

Unloaded; R = ∞ ; see figure 1
with load; R = 50Ω; (RS422);
see figure 1
with load; R = 27Ω; (RS485); see figure 1

0.2

Volts

R = 27Ω or R = 50Ω; see figure 1

3
0.8
±10

Volts
Volts
Volts
µA

R = 27Ω or R = 50Ω; see figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE

250
250

mA
mA

-7V ≤ VO ≤ +12V
-7V ≤ VO ≤ +12V

30

60

Mbps
ns

Driver Input to Output

30

60

ns

Driver Skew

5

10

ns

Driver Rise or Fall Time

15

40

ns

Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High

40
40
40
40

70
70
70
70

ns
ns
ns
ns

RE = 5V, DE = 5V
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
see figures 3 and 6,
tSKEW = | tDPLH - tDPHL |
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see figures 3 and 6

+0.2

Volts
mV
Volts
Volts

-7V ≤ VCM ≤ +12V
VCM = 0V
IO = -4mA,VID = +200mV
IO = +4mA,VID = -200mV

µA
kΩ
mA
mA
mA

0.4V ≤ VO ≤ 2.4V; RE = 5V
-7V ≤ VCM ≤ +12V
DE = 0V, VCC = 0V or 5.25V, VIN = 12V
DE = 0V, VCC = 0V or 5.25V, VIN = -7V
0V ≤ VCM ≤ VCC

Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
SP481/SP485 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output

MIN.

2.0

35
35

5

SP481/SP483/SP485 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
2.4
Output Voltage Low
0.0
Three-State (High Impedance)
Output Current
Input Resistance
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current

Rev. 07/28/04

TYP.

10
5
0.4
±1
15
+1.0
-0.8
95

CL = 100pF; see figures 4 & 7; S2 closed
CL = 100pF; see figures 4 & 7; S1 closed
CL = 15pF; see figures 2 & 9; S1 closed
CL = 15pF; see figures 2 & 9; S2 closed

SP481/483/485 Low Power Half-Duplex RS485 Transceivers

2

© Copyright 2002 Sipex Corporation

ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS
SP481/SP485 RECEIVER

MIN.

TYP.

MAX.

UNITS

CONDITIONS

AC Characteristics
Maximum Data Rate
Receiver Input to Output

5
60

90

200

Mbps
ns

Receiver Input to Output

60

90

200

ns

RE = 0V, DE = 0V
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;

Diff. Receiver Skew ItPLH-tPHLI

13

ns

Figures 3 & 8

Receiver Enable to
Output Low
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High

20

50

ns

CRL = 15pF; Figures 2 & 9; S1 closed

20
20
20

50
50
50

ns
ns
ns

CRL = 15pF; Figures 2 & 9; S2 closed
CRL = 15pF; Figures 2 & 9; S1 closed
CRL = 15pF; Figures 2 & 9; S2 closed

200

600

ns

RE = 5V, DE = 0V

40

100

ns

CL = 100pF; See figures 4 & 7; S2 closed

40

100

ns

CL = 100pF; See figures 4 & 7; S1 closed

300

1000

ns

CL = 15pF; See figures 2 & 9; S2 closed

300

1000

ns

CL = 15pF; See figures 2 & 9; S1 closed

+5.25

Volts

SP481
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 Voltage
Supply Current
SP481/485
No Load

50

+4.75

SP483
No Load
SP481/SP483
Shutdown Mode
ENVIRONMENTAL AND
MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
Plastic DIP (_S)
NSOIC (_N)

Rev. 07/28/04

0
-40
-65

900

µA
µA

RE, DI = 0V or VCC; DE = VCC
RE = 0V, DI = 0V or 5V; DE = 0V

600

µA
µA

RE, DI = 0V or VCC; DE = VCC
RE=0V, DI = 0V or 5V; DE = 0V

10

µA

DE = 0V, RE=VCC

+70
+85
+150

°C
°C
°C

SP481/483/485 Low Power Half-Duplex RS485 Transceivers

3

© Copyright 2002 Sipex Corporation

SP483 AC SPECIFICATIONS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

PARAMETERS
SP483 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output

MIN.

TYP.

MAX.

UNITS

CONDITIONS

250
250

800

2000

kbps
ns

tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

Driver Skew

250

800

2000

ns

tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

100

800

ns

250

2000

ns

Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High

250
250
300
300

2000
2000
3000
3000

ns
ns
ns
ns

SP483 RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output

250
250

2000

kbps
ns

see figures 3 & 6

Driver Rise and Fall Time

see figures 3 & 6
see figures 3 & 6,
tSKEW = |tDPLH - tDPHL|

From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF, see figures 3 & 6
CL = 100pF; See figures 4 & 7; S2 closed
CL = 100pF; See figures 4 & 7; S1 closed
CL = 15pF; See figures 4 & 7; S1 closed
CL = 15pF; See figures 4 & 7; S2 closed

tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

Figures 3 & 8

Diff. Receiver Skew ItPLH-tPHLI

100

SP483
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

50

R

8

VCC

RE 2

7

B

DE 3

6

A

5

GND

DI 4

D

SP485

20

50

ns

CRL = 15pF; Figures 2 & 9; S1 closed

20
20
20

50
50
50

ns
ns
ns

CRL = 15pF; Figures 2 & 9; S2 closed
CRL = 15pF; Figures 2 & 9; S1 closed
CRL = 15pF; Figures 2 & 9; S2 closed

200

600

ns

RE = 5V, DE = 0V

2000

ns

CL = 100pF; See figures 4 & 7; S2 closed

2000

ns

CL = 100pF; See figures 4 & 7; S1 closed

2500

ns

CL = 15pF; See figures 4 & 7; S2 closed

2500

ns

CL = 15pF; See figures 4 & 7; S1 closed

PIN FUNCTION
Pin# Name Description

Top View

SP481, SP483, SP485
Pinout (Top View)
Rev. 07/16/02

RDIFF = 54Ω, CL1 = CL2 = 100pF;
Figures 3 & 8

Receiver Enable to
Output Low
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High

RO 1

ns

1
2

RO
RE

3

DE

4
5
6

DI
GND
A

7

B

8

Vcc

Receiver Output.
Receiver Output Enable
Active LOW.
Driver Output Enable
Active HIGH.
Driver Input.
Ground Connection.
Driver Output/Receiver Input
Non-inverting.
Driver Output/Receiver Input
Inverting.
Positive Supply 4.75V
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Title                           : SP481, SP483, SP485 - Datasheet. www.s-manuals.com.
Subject                         : SP481, SP483, SP485 - Datasheet. www.s-manuals.com.
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