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PDF ISL3259E Data sheet ( Hoja de datos )
| Número de pieza | ISL3259E | |
| Descripción | Full Fail-safe RS-485/RS-422 Transceivers | |
| Fabricantes | Intersil Corporation | |
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®
Data Sheet
February 18, 2008
ISL3259E
FN6587.1
±15kV ESD Protected, 100Mbps, 5V,
PROFIBUS®, Full Fail-safe,
RS-485/RS-422 Transceivers
Intersil’s ISL3259E is a ±15kV IEC61000 ESD Protected, 5V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. It also
features the larger output voltage and higher data rate (up to
100Mbps) required by high speed PROFIBUS applications.
The low bus currents (+220µA/-150µA) present a “1/5 unit
load” to the RS-485 bus, thus allowing up to 160 transceivers
on the network without violating the RS-485 specification’s
load limit, and without using repeaters.
This transceiver requires a 5V supply, and delivers at least a
2.1V differential output voltage. This translates into better noise
immunity (data integrity), longer reach, or the ability to drive up
to six 120Ω terminations in “star” or other non-standard bus
topologies.
SCSI applications benefit from the ISL3259’s low receiver
and transmitter part-to-part skews, which make it perfect for
high speed parallel applications where large numbers of bits
must be simultaneously captured. The low bit-to-bit skew
eases the timing constraints on the data latching signal.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven. Rx outputs feature high
drive levels (typically >30mA @ VOL = 1V) to ease the design
of optically isolated interfaces.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
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.
Features
• IEC61000 ESD Protection on RS-485 I/O Pins . . . ±15kV
- Class 3 HBM ESD Level on all Other Pins . . . . . . >9kV
• Large Differential VOUT . . . . . . . . . . . . . . . 2.8V into 54Ω
Better Noise Immunity, or Drive up to 6 Terminations
• Very High Data Rate . . . . . . . . . . . . . . . . up to 100Mbps
• 11/13ns (Max) Tx/Rx Propagation Delays; 1.5ns (Max)
Skew
• 1/5 Unit Load Allows up to 160 Devices on the Bus
• Full Fail-Safe (Open, Shorted, Terminated/Undriven)
Receiver
• High Rx IOL to Drive Opto-Couplers for Isolated
Applications
• Hot Plug - Tx and Rx Outputs Remain Three-State During
Power-Up
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . 4mA
• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . . 1µA
• -7V to +12V Common Mode Input Voltage Range
• Three-State Rx and Tx Outputs
• Operates from a Single +5V Supply
• Current Limiting and Thermal Shutdown for Driver
Overload Protection
• Pb-Free (RoHS Compliant)
Applications
• PROFIBUS® DP and FMS Networks
• SCSI “Fast 40” Drivers and Receivers
• Motor Controller/Position Encoder Systems
• Factory Automation
• Field Bus Networks
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
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. 2007, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL3259E
Electrical Specifications Test Conditions: VCC = 4.75V to 5.25V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = +25°C,
(Note 5). (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP MIN
MAX
(°C) (Note 14) TYP (Note 14) UNITS
Receiver Input Resistance
Receiver Short-Circuit Current
SUPPLY CURRENT
RIN
IOSR
-7V ≤ VCM ≤ 12V
0V ≤ VO ≤ VCC
Full 54
Full ±20
80 - kΩ
-
±110
mA
No-Load Supply Current (Note 6)
Shutdown Supply Current
ESD PERFORMANCE
ICC
ISHDN
DI = DE = 0V or VCC
DE = 0V, RE = VCC, DI = 0V or VCC
Full - 2.6 4 mA
Full - 0.05 1 µA
RS-485 Pins (A/Y, B/Z)
IEC61000-4-2, Air-Gap Discharge Method
25
-
±15
-
kV
IEC61000-4-2, Contact Discharge Method
25
-
±8
- kV
Human Body Model, From Bus Pins to GND 25
- ±16.5 -
kV
All Pins
HBM, per MIL-STD-883 Method 3015
25 - > ±9 - kV
Machine Model
25 - > ±400 -
V
DRIVER SWITCHING CHARACTERISTICS
Maximum Data Rate
fMAX VOD ≥ ±1.5V, RD = 54Ω, CL = 100pF (Figure 4) Full
100
-
- Mbps
Driver Differential Output Delay
tDD RD = 54Ω, CD = 50pF (Figure 2)
Full -
8 12 ns
Driver Differential Output Skew
tSKEW RD = 54Ω, CD = 50pF (Figure 2)
Full -
0.5 1.5 ns
Prop Delay Part-to-Part Skew
tSKP-P RD = 54Ω, CD = 50pF (Figure 2), (Note 13)
Full
-
-
4 ns
Driver Differential Rise or Fall
Time
tR, tF RD = 54Ω, CD = 50pF (Figure 2)
Full 2 5 8 ns
Driver Enable to Output High
tZH RL = 110Ω, CL = 50pF, SW = GND (Figure 3), Full
(Note 8)
-
13 20 ns
Driver Enable to Output Low
tZL RL = 110Ω, CL = 50pF, SW = VCC (Figure 3), Full
(Note 8)
-
11 20 ns
Driver Enable Time Skew
Driver Disable from Output High
Driver Disable from Output Low
Driver Disable Time Skew
Time to Shutdown
Driver Enable from Shutdown to
Output High
tENSKEW |tZH (Y or Z) - tZL (Z or Y)|
tHZ RL = 110Ω, CL = 50pF, SW = GND (Figure 3)
tLZ RL = 110Ω, CL = 50pF, SW = VCC (Figure 3)
tDISSKEW |tHZ (Y or Z) - tLZ (Z or Y)|
tSHDN (Note 10)
tZH(SHDN) RL = 110Ω, CL = 50pF, SW = GND (Figure 3),
(Notes 10, 11)
Full
Full
Full
Full
Full
Full
-
-
-
-
60
-
2.5 - ns
14 20 ns
12 20 ns
3 - ns
- 600 ns
-
1000
ns
Driver Enable from Shutdown to tZL(SHDN) RL = 110Ω, CL = 50pF, SW = VCC (Figure 3), Full
Output Low
(Notes 10, 11)
-
-
1000
ns
RECEIVER SWITCHING CHARACTERISTICS
Maximum Data Rate
fMAX VID = ±1.5V
Full 100
-
- Mbps
Receiver Input to Output Delay tPLH, tPHL (Figure 5)
Full -
9 13 ns
Receiver Skew | tPLH - tPHL |
tSKD (Figure 5)
Full -
0 1.5 ns
Prop Delay Part-to-Part Skew
tSKP-P (Figure 5), (Note 13)
Full - - 4 ns
Receiver Enable to Output High
tZH RL = 1kΩ, CL = 15pF, SW = GND (Figure 6), Full
(Note 9)
-
- 12 ns
Receiver Enable to Output Low
tZL RL = 1kΩ, CL = 15pF, SW = VCC (Figure 6), Full
(Note 9)
-
- 12 ns
Receiver Disable from Output
High
tHZ RL = 1kΩ, CL = 15pF, SW = GND (Figure 6) Full
-
- 12 ns
5 FN6587.1
February 18, 2008
5 Page 
ISL3259E
Low Power Shutdown Mode
This BiCMOS transceiver uses a fraction of the power
required by their bipolar counterparts, but it also includes a
shutdown feature that reduces the already low quiescent ICC
to a 50nA trickle. It enters shutdown whenever the receiver
and driver are simultaneously disabled (RE = VCC and
DE = GND) for a period of at least 600ns. Disabling both the
driver and the receiver for less than 60ns guarantees that
the transceiver will not enter shutdown.
Note that receiver and driver enable times increase when
the transceiver enables from shutdown. Refer to Notes 8, 9,
10, 11 and 12, at the end of the “Electrical Specifications”
table on page 6, for more information.
Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified
110
100
90
80
70
60
50
40
30
20
10
0
0
+25°C
+85°C
RD = 20Ω
RD = 30Ω
RD = 54Ω
RD = 100Ω
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 8. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
3.5
3.4
RD = 100Ω
3.3
3.2
3.1
3.0
2.9
2.8
2.7
RD = 54Ω
2.6
2.5
-40
-15 10 35
TEMPERATURE (°C)
60
85
FIGURE 9. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
200
150
Y OR Z = LOW
100
50
0
-50
-100
Y OR Z = HIGH
-150
-7 -6 -4 -2 0 2 4 6
OUTPUT VOLTAGE (V)
8 10 12
FIGURE 10. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
2.55
2.50
2.45
2.40
2.35
2.30
-40
DE = VCC, RE = X OR DE = GND, RE = GND
-15 10 35
TEMPERATURE (°C)
60
85
FIGURE 11. SUPPLY CURRENT vs TEMPERATURE
11 FN6587.1
February 18, 2008
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ISL3259E.PDF ] | |
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