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PDF ISL31475E Data sheet ( Hoja de datos )
| Número de pieza | ISL31475E | |
| Descripción | (ISL31470E - ISL31478E) RS-485/RS-422 Transceivers | |
| Fabricantes | Intersil Corporation | |
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Fault Protected, Extended Common Mode Range,
RS-485/RS-422 Transceivers
ISL31470E, ISL31472E, ISL31475E, ISL31478E
The ISL31470E, ISL31472E, ISL31475E, ISL31478E are
fault protected, extended common mode range
differential transceivers that exceed the RS-485 and
RS-422 standards for balanced communication. The
RS-485 bus pins (driver outputs and receiver inputs)
are protected against overvoltages up to ±60V.
Additionally, these transceivers operate in environments
with common mode voltages up to ±15V (exceeds the
RS-485 requirement), making this RS-485 family one
of the more robust on the market.
Transmitters deliver an exceptional 2.5V (typical)
differential output voltage into the RS-485 specified 54Ω
load. This yields better noise immunity than standard
RS-485 ICs, or allows up to six 120Ω terminations in star
topologies.
Receiver (Rx) inputs feature a “Full Fail-Safe” design
which ensures a logic high Rx output if Rx inputs are
floating, shorted, or on a terminated but undriven (idle)
bus. Rx outputs feature high drive levels - typically
15mA @ VOL = 1V (to ease the design of opto-coupled
isolated interfaces).
Half duplex (Rx inputs and Tx outputs multiplexed
together) and full duplex pinouts are available. See Table
1 on page 2 for key features and configurations by device
number.
For an RS-485 family with a ±25V extended common
mode range, please see the ISL31490E and ISL31480E
data sheets.
Features
• Fault Protected RS-485 Bus Pins. . . . . . .up to ±60V
• Extended Common Mode Range . . . . . . . . . . . ±15V
Larger Than Required for RS-485
• 1/4 Unit Load for up to 128 Devices on the Bus
• High Transient Over Voltage Tolerance . . . . . . ±80V
• Full Fail-safe (Open, Short, Terminated) RS-485
Receivers
• High Rx IOL for Opto-Couplers in Isolated Designs
• Hot Plug Circuitry - Tx and Rx Outputs Remain
Three-State During Power-up/Power-down
• Choice of RS-485 Data Rates . . . .250kbps to 15Mbps
• Low Quiescent Supply Current . . . . . . . . . . 2.3mA
Ultra Low Shutdown Supply Current . . . . . . . 10μA
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters/Automated Meter Reading Systems
• High Node Count Systems
• PROFIBUS™ and Field Bus Networks, and Factory
Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
Exceptional Rx Operates at
>15Mbps Even with ±15V
Common Mode Voltage
20
B
15
A
VID = ±1V
10
5
RO
0
-5
TIME (20ns/DIV)
Transceivers Deliver Superior
Common Mode Range vs
Standard RS-485 Devices
15
12
0
-7
-15
STANDARD RS-485
TRANSCEIVER
ISL3147xE
June 17, 2010
FN7639.0
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2010 All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL31470E, ISL31472E, ISL31475E, ISL31478E
www.DataSheet4U.com
Absolute Maximum Ratings
VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . -0.3V to (VCC + 0.3V)
Input/Output Voltages
A/Y, B/Z, A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . ±60V
A/Y, B/Z, A, B, Y, Z
(Transient Pulse Through 100Ω, Note 17) . . . . . . . ±80V
RO . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . see Specification Table
Latch-up (per JESD78, Level 2, Class A) . . . . . . . . . +125°C
Thermal Information
Thermal Resistance (Typical)
θJA (°C/W) θJC (°C/W)
8 Ld PDIP* Package (Notes 5, 7) . . . 105
60
8 Ld SOIC Package (Notes 6, 7). . . . 116
47
14 Ld SOIC Package (Notes 6, 7) . . . 88
39
Maximum Junction Temperature (Plastic Package) . . . .+150°C
Maximum Storage Temperature Range . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
*Pb-free PDIPs can be used for through-hole wave solder
processing only. They are not intended for use in Reflow
solder processing applications.
Recommended Operating Conditions
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Temperature Range . . . . . . . . . . . . . . . . . . -40°C to +85°C
Bus Pin Common Mode Voltage Range . . . . . . -15V to +15V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
5. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air.
6. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief
TB379 for details.
7. For θJC, the “case temp” location is taken at the package top center.
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C.
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
DC CHARACTERISTICS
Driver Differential VOUT
(No load)
VOD1
Full -
- VCC
V
Driver Differential VOUT
(Loaded, Figure 1A)
VOD2
RL = 100Ω (RS-422)
RL = 54Ω (RS-485)
Full 2.4 3.2
-
Full 1.5 2.5 VCC
RL = 54Ω (PROFIBUS, VCC ≥ 5V)
Full 2.0 2.5
-
RL = 21Ω (Six 120Ω terminations for Full 0.8 1.3
Star Configurations, VCC ≥ 4.75V)
-
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
ΔVOD RL = 54Ω or 100Ω (Figure 1A)
Full -
- 0.2
V
V
V
V
Driver Differential VOUT with
Common Mode Load
(Figure 1B)
Driver Common-Mode VOUT
(Figure 1A)
VOD3
VOC
RL = 60Ω, -7V ≤ VCM ≤ 12V
RL = 60Ω, -15V ≤ VCM ≤ 15V
(VCC ≥ 4.75V)
RL = 54Ω or 100Ω
Full 1.5 2.1 VCC
Full 1.7 2.3
-
Full -1
-
3
V
v
V
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
ΔVOC RL = 54Ω or 100Ω (Figure 1A)
Full -
- 0.2
V
Driver Short-Circuit Current
IOSD
IOSD1
IOSD2
DE = VCC, -15V ≤ VO ≤ 15V (Note 10)
At First Fold-back, 22V ≤ VO ≤ -22V
At Second Fold-back, 35V ≤ VO ≤ -35V
Full
Full
Full
-250
-83
-13
-
-
-
250
83
13
mA
mA
mA
5 FN7639.0
June 17, 2010
5 Page 
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Test Circuits and Waveforms (Continued)
www.DataSheet4U.com
RE
B
A
RO
R
15pF
B
0V
A
750mV
0V
-750mV
SIGNAL
GENERATOR
SIGNAL
GENERATOR
tPLH
tPHL
VCC
RO
50%
50%
0V
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY AND DATA RATE
SIGNAL
GENERATOR
RE
B
A
RO
R
1kΩ
VCC
SW GND
15pF
Note 13
RE
1.5V
1.5V
3V
0V
PARAMETER
tHZ
tLZ
tZH (Note 12)
tZL (Note 12)
tZH(SHDN) (Note 15)
tZL(SHDN) (Note 15)
DE
0
0
0
0
0
0
A
+1.5V
-1.5V
+1.5V
-1.5V
+1.5V
-1.5V
SW
GND
VCC
GND
VCC
GND
VCC
tZH, tZH(SHDN)
Note 13
RO
tZL, tZL(SHDN)
Note 13
RO
tHZ
OUTPUT HIGH
1.5V
VOH - 0.5V VOH
0V
tLZ
1.5V
OUTPUT LOW
VCC
VOL + 0.5V VOL
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
11 FN7639.0
June 17, 2010
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet ISL31475E.PDF ] | |
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