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PDF ISL8488IP Data sheet ( Hoja de datos )

Número de pieza ISL8488IP
Descripción 5V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
Fabricantes Intersil Corporation　
Logotipo Intersil Corporation Logotipo



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®
Data Sheet
ISL8483, ISL8485, ISL8488,
ISL8489, ISL8490, ISL8491
December 2003
FN6046.3
5V, Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The Intersil RS-485/RS-422 devices are BiCMOS 5V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication. Unlike
competitive devices, this Intersil family is specified for 10%
tolerance supplies (4.5V to 5.5V).
The ISL8483, ISL8488, and ISL8489 utilize slew rate limited
drivers which reduce EMI, and minimize reflections from
improperly terminated transmission lines, or unterminated
stubs in multidrop and multipoint applications.
Data rates up to 5Mbps are achievable by using the
ISL8485, ISL8490, or ISL8491, which feature higher slew
rates.
All devices present a “single unit load” to the RS-485 bus,
which allows up to 32 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are
floating.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
The ISL8488 - 91 are configured for full duplex (separate Rx
input and Tx output pins) applications. The ISL8488 and
ISL8490 are offered in space saving 8 lead packages for
applications not requiring Rx and Tx output disable functions
(e.g., point-to-point). Half duplex configurations (ISL8483,
ISL8485) multiplex the Rx inputs and Tx outputs to allow
transceivers with Rx and Tx disable functions in 8 lead
packages.
Features
• Specified for 10% Tolerance Supplies
• Class 3 ESD Protection (HBM) on all Pins. . . . . . . . >7kV
• High Data Rates. . . . . . . . . . . . . . . . . . . . . . up to 5Mbps
• Slew Rate Limited Versions for Error Free Data
Transmission at 250kbps (ISL8483, ISL8488, ISL8489)
• Single Unit Load Allows up to 32 Devices on the Bus
• 1nA Low Current Shutdown Mode (ISL8483)
• Low Quiescent Current:
- 160µA (ISL8483, ISL8488, ISL8489)
- 340µA (ISL8485, ISL8490, ISL8491)
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs (Except ISL8488,
ISL8490)
• 30ns Propagation Delays, 5ns Skew (ISL8485, ISL8490,
ISL8491)
• Full Duplex and Half Duplex Pinouts
• Operate from a Single +5V Supply (10% Tolerance)
• Current Limiting and Thermal Shutdown for driver
Overload Protection
Applications
• Factory Automation
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators (e.g., RS-232 to RS-422)
• RS-232 “Extension Cords”
TABLE 1. SUMMARY OF FEATURES
PART HALF/FULL NO. OF DEVICES DATA RATE SLEW-RATE
RECEIVER/
QUIESCENT LOW POWER PIN
NUMBER DUPLEX ALLOWED ON BUS (Mbps)
LIMITED? DRIVER ENABLE? ICC (µA) SHUTDOWN? COUNT
ISL8483
Half
32 0.25 Yes Yes 160 Yes 8
ISL8485
Half
32
5 No
Yes 340 No 8
ISL8488
Full
32 0.25 Yes No 160 No 8
ISL8489
Full
32 0.25 Yes Yes 160 No 14
ISL8490
Full
32
5 No
No 340 No 8
ISL8491
Full
32
5 No
Yes 340 No 14
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.

1 page




ISL8488IP pdf
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
Absolute Maximum Ratings
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V)
Input/Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V)
Short Circuit Duration
Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating
HBM (Per MIL-STD-883, Method 3015.7) . . . . . . . . . . . . . . >7kV
Operating Conditions
Temperature Range
ISL84XXCX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC
ISL84XXIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC
Thermal Information
Thermal Resistance (Typical, Note 1)
θJA (oC/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
170
8 Ld PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . .
140
14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
120
14 Ld PDIP Package . . . . . . . . . . . . . . . . . . . . . . . .
100
Moisture Sensitivity (see Technical Brief TB363)
All Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1
Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: VCC
Typicals are at VCC =
= 4.5V
5V, TA
to
=
5.5V; Unless
25oC, Note 2
Otherwise
Specified.
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(oC) MIN TYP MAX UNITS
DC CHARACTERISTICS
Driver Differential VOUT (no load)
Driver Differential VOUT (with load)
VOD1
VOD2
R = 50Ω (RS-422), Figure 1
R = 27Ω (RS-485), Figure 1
Full -
Full 2
Full 1.5
- VCC
3-
2.3 5
V
V
V
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
∆VOD R = 27Ω or 50Ω, Figure 1
Full - 0.01 0.2 V
Driver Common-Mode VOUT
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
VOC
∆VOC
R = 27Ω or 50Ω, Figure 1
R = 27Ω or 50Ω, Figure 1
Full - - 3 V
Full - 0.01 0.2 V
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Input Current (A, B), Note 10
Receiver Differential Threshold
Voltage
VIH DE, DI, RE
VIL DE, DI, RE
IIN1 DE, DI, RE (ISL8483)
IIN1 DI (ISL8485 - ISL8491)
IIN1 DE, RE (ISL8485, ISL8489, ISL8491)
IIN2 DE = 0V, VCC = 0V or VIN = 12V
4.5 to 5.5V
VIN = -7V
VTH -7V ≤ VCM ≤ 12V
Full 2 - - V
Full -
- 0.8 V
Full -2 - 2 µA
Full -2
-
2 µA
Full -25 - 25 µA
Full - - 1 mA
Full -
- -0.8 mA
Full -0.2 - 0.2 V
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (high impedance)
Receiver Output Current
∆VTH
VOH
VOL
IOZR
VCM = 0V
IO = -4mA, VID = 200mV
IO = -4mA, VID = 200mV
0.4V ≤ VO ≤ 2.4V
25 - 70 - mV
Full 3.5
-
-V
Full -
- 0.4 V
Full -
- ±1 µA
5

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ISL8488IP arduino
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
Typical Performance Curves VCC = 5V, TA = 25oC, ISL8483 thru ISL8491; Unless Otherwise Specified (Continued)
160
140
120
Y OR Z = LOW
100
80
60
40
20
0
-20
Y OR Z = HIGH
-40
-60
-80
-100
-120
-7 -6 -4 -2 0 2 4 6
OUTPUT VOLTAGE (V)
8 10 12
600
550 ISL8485, DE = VCC, RE = X
500
450
400 ISL8483, DE = VCC, RE = X
ISL8485, DE = GND, RE = X
350
300 ISL8490/91, DE = RE = X
250
200 ISL8483, DE = GND, RE = GND; ISL8488/89, DE = RE = X
150
100
-40
-25
0 25 50
TEMPERATURE (oC)
75 85
FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
FIGURE 9. SUPPLY CURRENT vs TEMPERATURE
1200
1100
1000
tPLHY
tPLHZ
900
tPHLY
800
tPHLZ
700
600
500
-40
-25
0 25 50
TEMPERATURE (oC)
75 85
FIGURE 10. DRIVER PROPAGATION DELAY vs
TEMPERATURE (ISL8483, ISL8488, ISL8489)
400
300
|tPHLY - tPLHZ|
200 |tPLHY - tPHLZ|
100
|CROSS PT. OF Y↑ & Z↓ - CROSS PT. OF Y↓ & Z↑|
0
-40 -25
0 25 50
TEMPERATURE (oC)
75
FIGURE 11. DRIVER SKEW vs TEMPERATURE
(ISL8483, ISL8488, ISL8489)
85
40 3
35
30 tPHLZ
25
tPHLY
tPLHY
tPLHZ
20
-40 -25
0 25 50
TEMPERATURE (oC)
75 85
FIGURE 12. DRIVER PROPAGATION DELAY vs
TEMPERATURE (ISL8485, ISL8490, ISL8491)
11
2.5
|tPHLY - tPLHZ|
2
|tPLHY - tPHLZ|
1.5
|CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑|
1
-40 -25
0 25 50
TEMPERATURE (oC)
FIGURE 13. DRIVER SKEW vs TEMPERATURE
(ISL8485, ISL8490, ISL8491)
75 85

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