DATASHEET

ISL4486, ISL81486
UCT
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ISL3159
Data Sheet
August 2004
5V, Ultra High Speed, PROFIBUS®,
RS-485/RS-422 Transceivers
Features
• Specified for 10% Tolerance Supplies
The Intersil ISL4486 and ISL81486 are BiCMOS, 5V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication, and feature
the larger output voltage and higher data rate - up to
40Mbps - required by high speed PROFIBUS applications.
Unlike competitive products, these Intersil devices are
specified for 10% tolerance supplies (4.5V to 5.5V) and
deliver at least a 2.3V differential output voltage over this
supply range. At the 5% tolerance specified by many
competitors, the ISL4486 delivers an unsurpassed 2.5V
differential signal into a 54 total load. This translates into
longer reach, or better data integrity, at the exceptional
40Mbps data rate.
SCSI applications benefit from the ISL4486’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.
These devices present a “0.6 unit load” to the RS-485 bus,
which allows up to 50 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.
TEMP.
RANGE (°C)
• High Data Rates
ISL4486 . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps
ISL81486 . . . . . . . . . . . . . . . . . . . . . . . . . up to 30Mbps
• Large Differential Output Voltage . . . . . . . . . . 3V into 54
• Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications
• 0.6 Unit Load Allows up to 50 Devices on the Bus
• ISL81486 is a Drop-In Replacement for the ADM1486
• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 800A
• -7V to +12V Common Mode Input Voltage Range
• Three-State Rx and Tx Outputs
• 14ns (Max) Propagation Delays, 2ns (Max) Skew
• Operates from a Single +5V Supply (10% Tolerance)
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Pb-free available
Applications
• SCSI “Fast 40” Drivers and Receivers
• PROFIBUS DP and FMS Networks
• Factory Automation
• Field Bus Networks
• Security Networks
• Building Environmental Control Systems
Ordering Information
PART NO. (BRAND)
FN6060.2
PACKAGE
PKG.
DWG. #
ISL4486IB (4486IB)
-40 to 85
8 Ld SOIC
M8.15
ISL4486IBZ (4486IB)
(See Note)
-40 to 85
8 Ld SOIC
(Pb-free)
M8.15
ISL4486IU (4486)
-40 to 85
8 Ld MSOP
M8.118
ISL4486IUZ (4486)
(See Note)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
ISL81486IB (81486IB)
-40 to 85
8 Ld SOIC
M8.15
ISL81486IBZ
(81486IB) (See Note)
-40 to 85
8 Ld SOIC
(Pb-free)
M8.15
ISL81486IU (1486)
-40 to 85
8 Ld MSOP
M8.118
ISL81486IUZ (1486)
(See Note)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
• Industrial/Process Control Networks
Pinout
ISL4486, ISL81486 (SOIC, MSOP)
TOP VIEW
RO 1
8
VCC
RE 2
7
B/Z
DE 3
6
A/Y
5
GND
DI 4
R
D
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which
is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that meet or
exceed the Pb-free requirements of IPC/JEDEC J Std-020B.
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 trademark of Intersil Americas LLC
Copyright © Intersil Americas LLC 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL4486, ISL81486
Truth Table
Truth Table
TRANSMITTING
RECEIVING
INPUTS
OUTPUTS
INPUTS
OUTPUT
RE
DE
DI
B/Z
A/Y
RE
DE
A-B
RO
X
1
1
0
1
0
0
 +0.2V
1
X
1
0
1
0
0
0
 -0.2V
0
X
0
X
High-Z
High-Z
0
0
Inputs Open
1
1
X
X
High-Z
Pin Descriptions
PIN
FUNCTION
RO
Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
DE
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
DI
Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.
GND
Ground connection.
A/Y
RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y) if DE = 1.
B/Z
RS-485/422 level, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if DE = 1.
VCC
System power supply input (4.5V to 5.5V).
Typical Operating Circuit
ISL4486
+5V
+5V
+
8
0.1F
0.1F
+
8
VCC
1 RO
VCC
R
D
2 RE
B/Z
7
3 DE
A/Y
6
4 DI
RT
RT
7
B/Z
DE 3
6
A/Y
RE 2
R
D
GND
GND
5
5
2
DI 4
RO 1
ISL4486, ISL81486
Absolute Maximum Ratings
Thermal Information
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
Input/Output Voltages
A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Thermal Resistance (Typical, Note 1)
JA (°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
105
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .
140
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(Lead Tips Only)
Operating Conditions
Temperature Range
ISLXX86IX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
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. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C,
Note 2
PARAMETER
TEMP
(°C)
MIN
TYP
MAX
UNITS
Full
-
-
VCC
V
R = 50 (RS-422) (Figure 1A)
Full
2.5
3.7
-
V
R = 27 (RS-485), VCC 4.75V (Figure 1A,
ISL4486 Only)
Full
2.5
3
5
V
R = 27 (RS-485), VCC= 4.5V (Figure 1A)
Full
2.3
-
5
V
RD = 60, -7V  VCM  12V, VCC 4.75V
(Figure 1B)
Full
2.4
-
-
V
VOD
R = 27 or 50, (Figure 1A)
Full
-
0.01
0.2
V
VOC
R = 27 or 50 (Figure 1A)
Full
-
-
3
V
VOC
R = 27 or 50 (Figure 1A)
Full
-
0.01
0.2
V
SYMBOL
TEST CONDITIONS
DC CHARACTERISTICS
Driver Differential VOUT (no load)
VOD1
Driver Differential VOUT (with load)
VOD2
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
Driver Common-Mode VOUT
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
Logic Input High Voltage
VIH
DE, DI, RE
Full
2
-
-
V
Logic Input Low Voltage
VIL
DE, DI, RE
Full
-
-
0.8
V
Logic Input Current
IIN1
DE, DI, RE
Full
-1
-
1
A
Input Current (A/Y, B/Z) (Note 5)
IIN2
DE = 0V, VCC = 0V or
4.5 to 5.5V
Receiver Differential Threshold
Voltage
VTH
VIN = 12V
Full
-
-
0.6
mA
VIN = -7V
Full
-0.35
-
-
mA
-7V  VCM  12V
Full
-0.2
-
0.2
V
Receiver Input Hysteresis
VTH
VCM = 0V
25
-
40
-
mV
Receiver Output High Voltage
VOH
IO = -4mA, VID = 200mV
Full
4
-
-
V
Receiver Output Low Voltage
VOL
IO = -4mA, VID = 200mV
Full
-
-
0.4
V
Three-State (high impedance)
Receiver Output Current
IOZR
0.4V  VO  2.4V
Full
-
-
1
A
Receiver Input Resistance
RIN
-7V  VCM  12V (Note 7)
Full
20
-
-
k
No-Load Supply Current (Note 3)
ICC
DI, RE = 0V or VCC
DE = VCC
Full
-
1
2
mA
DE = 0V
Full
-
0.8
1.5
mA
3
ISL4486, ISL81486
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C,
Note 2 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
Driver Short-Circuit Current,
VO = High or Low
IOSD1
DE = VCC, -7V  VY or VZ  12V (Note 4)
Full
60
-
250
mA
Receiver Short-Circuit Current
IOSR
0V  VO  VCC
Full
7
-
85
mA
Full
3
9
14
ns
Full
3
9
17
ns
Full
-
0
6
ns
SWITCHING CHARACTERISTICS
Driver Input to Output Prop Delay
tPLH, tPHL RDIFF = 54,
CL = 100pF (Figure 2)
Prop Delay Delta, Min-to-Max
tDP-PSKEW RDIFF = 54, CL = 100pF, ISL4486 Only (Note 6,
Figure 2)
Driver Prop Delay Skew
tSKEW
Driver Differential Rise or Fall Time
tR, tF
ISL4486
ISL81486
RDIFF = 54, CL = 100pF (Figure 2)
Full
-
0
2
ns
RDIFF = 54,
CL = 100pF (Figure 2)
ISL4486
Full
-
5
8
ns
ISL81486
Full
-
7
15
ns
Full
-
9
15
ns
tZH
CL = 50pF, SW = GND (Figure 3)
Driver Enable to Output Low
tZL
CL = 50pF, SW = VCC (Figure 3)
Full
-
9
15
ns
Matched Enable Switching
|tAZH - tBZL| or |tBZH - tAZL|
tEN
At Identical Test Conditions (Figure 3)
Full
-
1
3
ns
Driver Enable to Output High
Driver Disable from Output High
tHZ
CL = 50pF, SW = GND (Figure 3)
Full
-
9
15
ns
Driver Disable from Output Low
tLZ
CL = 50pF, SW = VCC (Figure 3)
Full
-
9
15
ns
Matched Disable Switching
|tAHZ - tBLZ| or |tBHZ - tALZ|
tDIS
At Identical Test Conditions (Figure 3)
Full
-
2
5
ns
Driver Maximum Data Rate
fMAXD
VOD|  1.5V (Figure 4)
ISL4486
Full
40
-
-
Mbps
ISL81486
Full
30
-
-
Mbps
ISL4486
Full
11
17
25
ns
ISL81486
Full
6
17
25
ns
Full
-
0
9
ns
Figure 5
Full
-
0.5
3
ns
Receiver Input to Output Prop
Delay
tPLH, tPHL
Prop Delay Delta, Min-to-Max
tRP-PSKEW ISL4486 Only (Note 6, Figure 5)
Receiver Prop Delay Skew
| tPLH - tPHL |
tSKD
(Figure 5)
Receiver Enable to Output High
tZH
CL = 15pF, SW = GND (Figure 6)
Full
-
7
13
ns
Receiver Enable to Output Low
tZL
CL = 15pF, SW = VCC (Figure 6)
Full
-
7
13
ns
Receiver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 6)
Full
-
7
13
ns
tLZ
CL = 15pF, SW = VCC (Figure 6)
Full
-
7
13
ns
CL = 15pF, VID  1.5V, RO tH and tL  20ns
Full
40
-
-
Mbps
Receiver Disable from Output Low
Receiver Maximum Data Rate
fMAXR
NOTES:
2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless
otherwise specified.
3. Supply current specification is valid for loaded drivers when DE = 0V.
4. Applies to peak current. See “Typical Performance Curves” for more information.
5. Devices meeting these limits are denoted as “0.6 unit load (UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so
a 0.6UL transceiver permits > 50 devices on the bus.
6. This is the part-to-part skew between any two units tested with identical test conditions (Temperature, VCC, etc.).
4
ISL4486, ISL81486
Test Circuits and Waveforms
VCC
R
DE
Z
DI
Z
DI
VOD
D
375
DE
VCC
VOD
D
Y
VCM
RD = 60
-7V to +12V
Y
VOC
R
375
FIGURE 1A. VOD AND VOC
FIGURE 1B. VOD WITH COMMON MODE LOAD
FIGURE 1. DC DRIVER TEST CIRCUITS
3V
DI
1.5V
1.5V
0V
tPLH
VCC
CL = 100pF
DE
tPHL
VOH
50%
OUT (Y)
50%
VOL
Z
DI
RDIFF
D
tPHL
Y
tPLH
CL = 100pF
VOH
OUT (Z)
SIGNAL
GENERATOR
50%
50%
VOL
90%
DIFF OUT (Y - Z)
+VOD
90%
10%
10%
tR
-VOD
tF
SKEW = |CROSSING PT. OF Y & Z - CROSSING PT. OF Y & Z|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
SIGNAL
GENERATOR
3V
Z
110
VCC
D
SW
Y
DE
1.5V
1.5V
0V
GND
CL
tZH
OUTPUT HIGH
PARAMETER OUTPUT
RE
DI
SW
CL (pF)
tHZ
Y/Z
X
1/0
GND
50
tLZ
Y/Z
X
0/1
VCC
50
tZH
Y/Z
X
1/0
GND
50
tZL
Y/Z
X
0/1
VCC
50
FIGURE 3A. TEST CIRCUIT
VOH - 0.5V
OUT (Y, Z)
VOH
2.3V
0V
tZL
tLZ
VCC
OUT (Y, Z)
2.3V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
5
tHZ
ISL4486, ISL81486
Test Circuits and Waveforms (Continued)
VCC
CL = 100pF
DE
3V
Z
DI
DI
RDIFF
D
Y
0V
CL = 100pF
SIGNAL
GENERATOR
+VOD
DIFF OUT (Y - Z)
-VOD
FIGURE 4A. TEST CIRCUIT
0V
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER DATA RATE
RE
3V
B
+1.5V
R
A
15pF
RO
A
1.5V
1.5V
0V
tPLH
tPHL
VCC
SIGNAL
GENERATOR
50%
RO
50%
0V
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY
3V
RE
B
SIGNAL
GENERATOR
1k
RO
R
VCC
SW
A
RE
1.5V
1.5V
0V
GND
tZH
15pF
OUTPUT HIGH
tHZ
VOH - 0.5V
RO
VOH
1.5V
0V
PARAMETER
DE
A
SW
tHZ
0
+1.5V
GND
tLZ
0
-1.5V
VCC
tZH
0
+1.5V
GND
tZL
0
-1.5V
VCC
FIGURE 6A. TEST CIRCUIT
tZL
VCC
RO
1.5V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
6
tLZ
ISL4486, ISL81486
Application Information
Data Rate, Cables, and Terminations
RS-485 and RS-422 are differential (balanced) data
transmission standards for use in long haul or noisy
environments. RS-422 is a subset of RS-485, so RS-485
transceivers are also RS-422 compliant. RS-422 is a pointto-multipoint (multidrop) standard, which allows only one
driver and up to 10 (assuming one unit load devices)
receivers on each bus. RS-485 is a true multipoint standard,
which allows up to 32 one unit load devices (any mix of
drivers and receivers) on each bus. To allow for multipoint
operation, the RS-485 spec requires that drivers must
handle bus contention without sustaining any damage.
Twisted pair is the cable of choice for RS-485, RS-422, and
PROFIBUS networks. Twisted pair cables tend to pick up
noise and other electromagnetically induced voltages as
common mode signals, which are effectively rejected by the
differential receivers in these ICs.
Another important advantage of RS-485 is the extended
common mode range (CMR), which specifies that the driver
outputs and receiver inputs withstand signals that range from
+12V to -7V. RS-422 and RS-485 are intended for runs as
long as 4000’ (~1200m), so the wide CMR is necessary to
handle ground potential differences, as well as voltages
induced in the cable by external fields.
Receiver Features
These devices utilize a differential input receiver for maximum
noise immunity and common mode rejection. Input sensitivity
is 200mV, as required by the RS422 and RS-485
specifications. Receiver inputs function with common mode
voltages as great as 7V outside the power supplies (i.e.,
+12V and -7V), making them ideal for long networks, or
industrial environments, where induced voltages are a
realistic concern.
Receiver input resistance surpasses the RS-422 spec of
4k, and exceeds the RS-485 “Unit Load” requirement of
12k minimum. The 20k input resistance allows at least 50
devices on the RS-485 bus. All the receivers include a “failsafe if open” function that guarantees a high level receiver
output if the receiver inputs are unconnected (floating).
Receivers easily meet the data rate supported by the driver,
and receiver outputs are three-statable via the active low RE
input.
Driver Features
The RS-485/RS-422 driver is a differential output device that
delivers at least 2.3V across a 54 load (RS-485/
PROFIBUS), and at least 2.5V across a 100 load (RS-422)
even with VCC = 4.5V. The drivers feature low propagation
delay skew to maximize bit width, and to minimize EMI.
Outputs of the drivers are not slew rate limited, so faster
output transition times allow data rates of at least 40Mbps
with the ISL4486, and 30Mbps with the ISL81486. Driver
outputs are three-statable via the active high DE input.
For parallel applications, bit-to-bit skews between any two
ISL4486 transmitter and receiver pairs are guaranteed to be
no worse than 15ns (6ns max for any two Tx, 9ns max for
any two Rx).
7
RS-485/RS-422 are intended for network lengths up to 4000’
(~1200m), but the maximum system data rate decreases as
the transmission length increases. According to guidelines in
the RS-422 and PROFIBUS specifications, networks
operating at data rates in excess of 3Mbps should be limited
to cable lengths of 100m (328 feet) or less, and the
PROFIBUS specification recommends that the more
expensive “Type A” (22AWG) cable be used. Nevertheless,
the ISL4486’s large differential output swing, fast transition
times, and high drive-current output stages allow operation
at 40Mbps over standard “CAT5” cables in excess of 400
feet (121m). Figure 8 details the ISL4486 performance at
this condition, with a 120 termination resistor at both the
driver and the receiver ends. Note that the differential signal
delivered to the receiver at the end of the cable (A-B) still
exceeds 1V, so even longer cables could be driven if lower
noise margins are acceptable. If more noise margin is
desired, shorter cables produce a larger receiver input signal
as illustrated in Figure 7. Performance should be even better
if the “Type A” cable is utilized. The lower data rate of the
ISL81486 allows for driving longer cables.
To minimize reflections, proper termination is imperative when
using these high data rate transceivers. In point-to-point, or
point-to-multipoint (single driver on bus) networks, the main
cable should be terminated in its characteristic impedance
(typically 120 for “CAT5”, and 220 for “Type A”) at the end
farthest from the driver. In multi-receiver applications, stubs
connecting receivers to the main cable should be kept as
short as possible. Multipoint (multi-driver) systems require that
the main cable be terminated in its characteristic impedance
at both ends. Stubs connecting a transceiver to the main cable
should be kept as short as possible.
Built-In Driver Overload Protection
As stated previously, the RS-485 spec requires that drivers
survive worst case bus contentions undamaged. These
transmitters meet this requirement via driver output short
circuit current limits, and on-chip thermal shutdown circuitry.
The driver output stages incorporate short circuit current
limiting circuitry which ensures that the output current never
exceeds the RS-485 spec, even at the common mode
voltage range extremes. In the event of a major short circuit
condition, the devices also include a thermal shutdown
feature that disables the drivers whenever the die
temperature becomes excessive. This eliminates the power
dissipation, allowing the die to cool. The drivers
automatically reenable after the die temperature drops about
15 degrees. If the contention persists, the thermal
shutdown/reenable cycle repeats until the fault is cleared.
Receivers stay operational during thermal shutdown.
ISL4486, ISL81486
0
5
RO
0
DRIVER+CABLE DELAY
3
1.5
(~290ns)
A-B
0
-1.5
-3
DI = 40Mbps
0
5
RO
0
DRIVER+CABLE DELAY
3
1.5
A-B
-1.5
-3
TIME (10ns/DIV)
FIGURE 7. ISL4486 DRIVER AND RECEIVER WAVEFORMS
DRIVING 200 FEET (61 METERS) OF CAT5
CABLE (DOUBLE TERMINATED WITH 120)
FIGURE 8. ISL4486 DRIVER AND RECEIVER WAVEFORMS
DRIVING 400 FEET (121 METERS) OF CAT5
CABLE (DOUBLE TERMINATED WITH 120)
950
DRIVER OUTPUT (V)
5
RDIFF = 54, CL = 100pF
3
A/Y
900
B/Z
850
DE = VCC, RE = X
2
ICC (A)
1
0
DIFF WAVEFORM (V)
(~585ns)
0
TIME (10ns/DIV)
4
5
DRIVER INPUT (V)
5
RECEIVER OUTPUT (V)
DI = 40Mbps
DRIVER INPUT (V)
VCC = 5V, TA = 25°C, ISL4486 and ISL81486; Unless Otherwise Specified
RECEIVER INPUT (V)
RECEIVER INPUT (V)
RECEIVER OUTPUT (V)
Typical Performance Curves
800
3
1.5
DE = GND, RE = X
750
A/Y - B/Z
0
-1.5
700
-40
-3
-25
TIME (10ns/DIV)
FIGURE 9. ISL81486 DRIVER WAVEFORMS AT 30Mbps
PER FIGURE 4
50
85
75
4
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER OUTPUT CURRENT (mA)
25
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE
120
100
80
60
40
20
0
0
TEMPERATURE (°C)
0
1
2
3
4
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
8
5
3.8
RDIFF = 100
3.6
3.4
3.2
RDIFF = 54
3
2.8
-40
-25
0
25
50
75
85
TEMPERATURE (°C)
FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
ISL4486, ISL81486
Typical Performance Curves
VCC = 5V, TA = 25°C, ISL4486 and ISL81486; Unless Otherwise Specified (Continued)
3
12
RDIFF = 54
2.5
11
|tPHL(Y or Z) - tPLH(Y or Z)| = PW Distortion
tPLHZ
2
tPLHY
10
SKEW (ns)
PROPAGATION DELAY (ns)
RDIFF = 54
9
tPHLY
1.5
|tPHLY - tPLHZ| or |tPLHY - tPHLZ|
1
tPHLZ
8
0.5
|CROSSING PT. OF Y & Z CROSSING PT. OF Y & Z|
0
-25
50
25
0
-40
85
75
-25
TEMPERATURE (°C)
0
RO
DRIVER OUTPUT (V)
5
4
A/Y
3
2
B/Z
1
RECEIVER OUTPUT (V)
5
DRIVER INPUT (V)
RECEIVER OUTPUT (V)
DRIVER OUTPUT (V)
RDIFF = 54, CL = 15pF
DI
0
0
5
0
RO
5
4
3
OUTPUT CURRENT (mA)
-160
B/Z
2
1
A/Y
0
FIGURE 16. DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW
Die Characteristics
Y OR Z = LOW
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
528
PROCESS:
Y OR
OR ZZ == HIGH
HIGH
Y
-7 -6
-4
-2
0
2
4
6
OUTPUT VOLTAGE (V)
8
Si Gate BiCMOS
10
12
FIGURE 17. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
9
5
0
TIME (10ns/DIV)
FIGURE 15. DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH
-60
-80
-100
-120
-140
85
75
RDIFF = 54, CL = 15pF
DI
TIME (10ns/DIV)
160
140
120
100
80
60
40
20
0
-20
-40
50
FIGURE 14. DRIVER SKEW AND PULSE DISTORTION vs
TEMPERATURE
FIGURE 13. DRIVER PROPAGATION DELAY vs
TEMPERATURE
5
0
25
TEMPERATURE (°C)
DRIVER INPUT (V)
7
-40
ISL4486, ISL81486
Mini Small Outline Plastic Packages (MSOP)
N
M8.118 (JEDEC MO-187AA)
8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
E1
INCHES
E
-B-
INDEX
AREA
1 2
0.20 (0.008)
A B C
TOP VIEW
4X 
0.25
(0.010)
R1
R
GAUGE
PLANE
SEATING
PLANE -CA
4X 
A2
A1
b
-H-
0.10 (0.004)
L1
SEATING
PLANE
C
D
0.20 (0.008)
C
a
CL
E1
0.20 (0.008)
C D
-B-
END VIEW
NOTES:
1. These package dimensions are within allowable dimensions of
JEDEC MO-187BA.
2. Dimensioning and tolerancing per ANSI Y14.5M-1994.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs and are measured at Datum Plane. Mold flash, protrusion
and gate burrs shall not exceed 0.15mm (0.006 inch) per side.
4. Dimension “E1” does not include interlead flash or protrusions
and are measured at Datum Plane. - H - Interlead flash and
protrusions shall not exceed 0.15mm (0.006 inch) per side.
5. Formed leads shall be planar with respect to one another within
0.10mm (0.004) at seating Plane.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “b” does not include dambar protrusion. Allowable
dambar protrusion shall be 0.08mm (0.003 inch) total in excess
of “b” dimension at maximum material condition. Minimum space
between protrusion and adjacent lead is 0.07mm (0.0027 inch).
10. Datums -A -H- .
and - B - to be determined at Datum plane
11. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only.
10
MAX
MIN
MAX
NOTES
0.037
0.043
0.94
1.10
-
A1
0.002
0.006
0.05
0.15
-
A2
0.030
0.037
0.75
0.95
-
b
0.010
0.014
0.25
0.36
9
c
0.004
0.008
0.09
0.20
-
D
0.116
0.120
2.95
3.05
3
E1
0.116
0.120
2.95
3.05
4
0.026 BSC
0.65 BSC
-
E
0.187
0.199
4.75
5.05
-
L
0.016
0.028
0.40
0.70
6
0.037 REF
N
C
SIDE VIEW
MIN
A
L1
-A-
e
SYMBOL
e
L
MILLIMETERS
0.95 REF
8
R
0.003
R1
0

-
8
-
0.07
0.003
-
5o
15o
0o
6o
7
-
-
0.07
-
-
5o
15o
-
0o
6o
Rev. 2 01/03
ISL4486, ISL81486
Small Outline Plastic Packages (SOIC)
M8.15 (JEDEC MS-012-AA ISSUE C)
N
INDEX
AREA
0.25(0.010) M
H
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC
PACKAGE
B M
E
INCHES
-B-
1
2
SYMBOL
3
L
SEATING PLANE
-A-
h x 45o
A
D
-C-
µ
e
A1
B
0.25(0.010) M
C
C A M
B S
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
MILLIMETERS
MIN
MAX
NOTES
A
0.0532
0.0688
1.35
1.75
-
0.0040
0.0098
0.10
0.25
-
B
0.013
0.020
0.33
0.51
9
C
0.0075
0.0098
0.19
0.25
-
D
0.1890
0.1968
4.80
5.00
3
E
0.1497
0.1574
3.80
4.00
4
0.050 BSC
1.27 BSC
-
H
0.2284
0.2440
5.80
6.20
-
h
0.0099
0.0196
0.25
0.50
5
L
0.016
0.050
0.40
1.27
6
8o
0o
N
NOTES:
MAX
A1
e
0.10(0.004)
MIN

8
0o
8
7
8o
Rev. 0 12/93
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per
side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
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11
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