DATASHEET
ISL32610E, ISL32611E, ISL32612E
±16.5kV ESD Protected, 1.8V, Micro Power, +125°C, 1/8 Unit Load, RS-485/RS-
422 Differential Receivers
The ISL32610E, ISL32611E, ISL32612E are ±16.5kV
IEC61000 ESD protected, fractional unit load (UL), 1.8V
powered, single differential receivers (Rx) for balanced (e.g.,
RS-485) data communication. With their 85µA supply
currents, these receivers are optimized for low power
applications, and deliver the lowest supply currents of any
available single Rx IC (see Figure 1).
To improve performance in low data rate applications with
slow signal transitions, these Rx feature symmetrical switching
points (±200mV) and increased hysteresis. The symmetrical
switching points eliminate the duty cycle distortion introduced
by “full-failsafe” type receivers (see Figure 2), while the larger
hysteresis increases noise immunity.
Receivers present a 1/8 “unit load” to the data bus, which
allows up to 256 devices on the network for large node count
systems (e.g., process automation, remote meter reading
systems). The ISL32611E/ISL32612E Rx output is tri-statable
via the RE/RE input.
Receiver inputs feature a “failsafe-if-open” design, which
ensures a logic high Rx output if Rx inputs are floating. Data
rates up to 256kbps are achievable with this device at
V
CC
= 1.8V.
See Table 1 for a summary of each device’s features. For a
companion 1.8V differential transmitter in a SOT-23 package,
reference the
ISL32613E
data sheet.
FN7869
Rev 0.00
October 21, 2011
Features
• Wide Supply Voltage Range . . . . . . . . . . . . . . . . . 1.8V to 3.6V
• Ultra Low Quiescent Supply Current . . . . . . . . . 110µA (Max.)
• IEC61000 ESD Protection on RS-485 Bus Pins . . . . ±16.5kV
- Class 3 ESD Level on all Other Pins. . . . . . . . . . >8kV HBM
• Symmetrical Switching Thresholds for Less Duty Cycle
Distortion (see Figure 2)
• Larger Hysteresis for Improved Noise Immunity . . . . . 70mV
• Data Rates up to 256kbps (1.8V) or 500kbps (3.3V)
• 1/8 Unit Load Allows up to 256 Devices on the RS-485 Bus
• Specified for +125°C Operation
• Three State Rx Output Available
• 5V Tolerant Logic Inputs
• Pb-Free (RoHS Compliant)
Applications
• Industrial/Process Control Networks, Factory Automation
• High Node Count Networks
• Space Constrained Systems
• Building Environmental Control Systems
RECEIVER INPUT (V)
500
450
400
350
300
250
I
CC
(µA)
200
150
1
A-B
0
-1
4
ISL3261XE
0
DYNAMIC (256kbps)
ISL3282E
STATIC
RECEIVER OUTPUT (V)
4
ISL3282E
0
V
CC
= 3.3V, DATA RATE = 125kbps
TIME (4µs/DIV)
100
DYNAMIC (256kbps)
ISL3261XE
STATIC
50
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
V
CC
(V)
FIGURE 1. ISL3261XE REDUCES OPERATING I
CC
BY A FACTOR OF
4 FROM PREVIOUS GENERATION RECEIVER ICs, AND
OPERATES WITH SUPPLY VOLTAGES AS LOW AS 1.8V
FIGURE 2. COMPARED WITH A FULL-FAILSAFE RECEIVER, THE
SYMMETRICAL RX THRESHOLDS OF THE ISL3261XE
DELIVER LESS OUTPUT DUTY CYCLE DISTORTION
WHEN DRIVEN WITH SLOW INPUT SIGNALS
FN7869 Rev 0.00
October 21, 2011
Page 1 of 12
ISL32610E, ISL32611E, ISL32612E
TABLE 1. SUMMARY OF FEATURES
NO. OF DEVICES
ALLOWED ON BUS
256
256
256
1.8V, 3.3V
DATA RATE
(kbps)
256, 500
256, 500
256, 500
QUIESCENT
I
CC
(µA)
85
85
85
LOW POWER
SHUTDOWN?
No
Yes
Yes
PIN
COUNT
5
6
6
PART NUMBER
ISL32610E
ISL32611E
ISL32612E
CONFIGURATION
Rx Only
Rx Only
Rx Only
Rx ENABLE?
No
Yes, Active Low
Yes, Active High
Ordering Information
PART NUMBER
(Notes 1, 2, 3, 4)
ISL32610EFHZ-T
ISL32610EFHZ-T7A
ISL32611EFHZ-T
ISL32611EFHZ-T7A
ISL32612EFHZ-T
ISL32612EFHZ-T7A
NOTES:
1. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and 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-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL32610E, ISL32611E, ISL32612E.
For more information on MSL,
please see Tech Brief
TB363.
4. The part marking is located on the bottom of the part.
PART MARKING
610F
610F
611F
611F
612F
612F
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
PACKAGE
Tape & Reel
(Pb-Free)
5 Ld SOT-23
5 Ld SOT-23
6 Ld SOT-23
6 Ld SOT-23
6 Ld SOT-23
6 Ld SOT-23
PKG. DWG. #
P5.064
P5.064
P6.064
P6.064
P6.064
P6.064
Pin Configurations
ISL32610E
(5 LD SOT-23)
TOP VIEW
V
CC
1
R
4
B
5
A
V
CC
1
R
ISL32612E
(6 LD SOT-23)
TOP VIEW
6
5
4
A
RE
B
GND 2
RO 3
GND 2
RO 3
ISL32611E
(6 LD SOT-23)
TOP VIEW
V
CC
1
R
6
5
4
A
RE
B
Truth Table
RECEIVING
INPUTS
RE / RE (Note 12)
0/1
0/1
0/1
1/0
A-B
≥
+0.2V
≤
-0.2V
Inputs Open
X
OUTPUT
RO
1
0
1
High-Z (Note 5)
GND 2
RO 3
NOTE:
5. Low Power Shutdown Mode (Note 10, except for the ISL32610E)
FN7869 Rev 0.00
October 21, 2011
Page 2 of 12
ISL32610E, ISL32611E, ISL32612E
Pin Descriptions
PIN NUMBER
PIN NAME
V
CC
GND
RO
B
RE
RE
ISL32610E
1
2
3
4
-
-
ISL32611E
1
2
3
4
5
-
ISL32612E
1
2
3
4
-
5
System power supply input (1.8V to 3.6V).
Ground connection.
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).
±16.5kV IEC61000 ESD Protected, inverting differential receiver input.
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. If
the enable function isn’t needed, connect RE to GND. RE is internally pulled low.
Receiver output enable. RO is enabled when RE is high; RO is high impedance when RE is low. If
the enable function isn’t needed, connect RE to V
CC
through a 1kΩ or greater resistor. RE is
internally pulled high.
±16.5kV IEC61000 ESD Protected, noninverting differential receiver input.
FUNCTION
A
5
6
6
Typical Operating Circuit
+1.8V
+
1
V
CC
3 RO
5 RE
R
B
A
4
6
4
6
Z
Y
0.1µF
0.1µF
+
2
V
CC
D
DI 1
DE 3
+1.8V
GND
2
ISL32611E
GND
5
ISL32613E
FN7869 Rev 0.00
October 21, 2011
Page 3 of 12
ISL32610E, ISL32611E, ISL32612E
Absolute Maximum Ratings
V
CC
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
RE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
A, B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
Output Voltages
RO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+0.3V)
ESD Rating . . . . . . . . . . . . . . See “Electrical Specifications” Table page 5
Latch-up (per JESD78, Level 2, Class A) . . . . . . . . . . . . . . . . . . . . . +125°C
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
JC
(°C/W)
5 Ld SOT-23 Package (Note 6, 7) . . . . . . .
190
120
6 Ld SOT-23 Package (Note 6, 7) . . . . . . .
177
120
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +125°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 3.3V
Common Mode Input Voltage
V
CC
= 1.8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to +2V
V
CC
= 3.3V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7V to +12V
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:
6.
JA
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
JC
, the “case temp” location is taken at the package top center.
Test Conditions: V
CC
= 1.8V; Unless Otherwise Specified. Typicals are at V
CC
= 1.8V, T
A
= +25°C. Boldface
limits apply over the operating temperature range, -40°C to +125°C. (Note 9)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 8)
TYP
MAX
(Note 8) UNITS
Electrical Specifications
(
DC CHARACTERISTICS
Logic Input High Voltage (Note 12)
V
IH
V
IL
I
IN1
I
IN2
RE, RE
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
Logic Input Low Voltage (Note 12)
RE, RE
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
Logic Input Current (Note 12)
RE, RE
V
CC
= 1.8V
V
CC
≤
3.6V
Input Current (A, B) (Note 11)
V
CC
= 0V or 1.8V
V
CC
= 0V or 3.6V
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
V
TH
V
TH
V
OH
V
OL
I
OZR
I
OSR
I
CC
I
SHDN
-2V
≤
V
CM
≤
2V
-7V
≤
V
CM
≤
12V
V
CM
= 0V
I
O
= -1mA, V
ID
= 200mV
I
O
= 2mA, V
ID
= -200mV
0V
≤
V
O
≤
V
CC
0V
≤
V
O
≤
V
CC
RE = 0V or RE = V
CC
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
Shutdown Supply Current
(Notes 10, 12)
ISL32611, RE = V
CC
, V
CC
≥
1.8V
ISL32612, RE = 0V
V
CC
= 1.8V
V
CC
≤
3.6V
V
IN
= 2V
V
IN
= -2V
V
IN
= 12V
V
IN
= -7V
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (High Impedance)
Receiver Output Current (Note 12)
Receiver Short-Circuit Current
No-Load Supply Current
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
1.2
2
-
-
-6
-12
-
-60
-
-100
-0.2
-0.2
-
-
V
CC
- 0.4
-
-1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
70
70
-
-
-
-
85
-
-
-
-
-
-
0.45
0.8
6
12
60
-
125
-
0.2
0.2
-
-
-
0.4
1
30
110
135
2
7
14
V
V
V
V
µA
µA
µA
µA
µA
µA
V
V
mV
mV
V
V
µA
mA
µA
µA
µA
µA
µA
FN7869 Rev 0.00
October 21, 2011
Page 4 of 12
ISL32610E, ISL32611E, ISL32612E
Test Conditions: V
CC
= 1.8V; Unless Otherwise Specified. Typicals are at V
CC
= 1.8V, T
A
= +25°C. Boldface
limits apply over the operating temperature range, -40°C to +125°C. (Note 9)
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 8)
TYP
MAX
(Note 8) UNITS
Electrical Specifications
SWITCHING CHARACTERISTICS
Maximum Data Rate
f
MAX
t
PLH
, t
PHL
t
SKD
t
ZH
t
ZL
t
HZ
t
LZ
V
ID
= ±1V, V
CM
= 0V,
(Figure 3)
(Figure 3)
V
CC
= 1.8V
3V
≤
V
CC
≤
3.6V
V
CC
= 1.8V
V
CC
= 3.3V
Receiver Skew | t
PLH
- t
PHL
|
Receiver Enable to Output High
(Figure 3)
V
CC
= 1.8V
V
CC
= 3.3V
C
L
= 15pF, SW = GND,
(Figure 4, Note 12)
C
L
= 15pF, SW = V
CC
,
(Figure 4, Note 12)
C
L
= 15pF, SW = GND,
(Figure 4, Note 12)
C
L
= 15pF, SW = V
CC
,
(Figure 4, Note 12)
V
CC
= 1.8V
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 3.3V
Full
Full
Full
25
Full
25
Full
25
Full
25
Full
25
Full
25
256
500
-
-
-
-
-
-
-
-
-
-
-
-
-
-
210
200
3
6
1100
1500
1100
1500
15
6
15
6
-
-
1000
-
125
-
4000
-
4000
-
75
-
75
-
kbps
kbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Receiver Input to Output Delay
Receiver Enable to Output Low
Receiver Disable from Output High
Receiver Disable from Output Low
ESD PERFORMANCE
RS-485 Pins (A, B)
IEC61000-4-2, Air-Gap Discharge Method
IEC61000-4-2, Contact Discharge Method
Human Body Model, From Bus Pins to GND
All Pins
Human Body Model (Tested per JESD22-A114E)
Machine Model (Tested per JESD22-A115-A)
NOTES:
8. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.
9. Currents into device pins are positive; currents out of device pins are negative. Voltages are referenced to ground unless otherwise specified.
10. The ISL32611E enters SHDN whenever RE switches high, and the ISL32612E enters SHDN whenever RE switches low.
11. Devices meeting these limits are denoted as “1/8 unit load (1/8 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so
there can be 256 1/8 UL devices on a bus.
12. Not applicable to the ISL32610E.
25
25
25
25
25
-
-
-
-
-
±16.5
±9
±16.5
±8
±400
-
-
-
-
-
kV
kV
kV
kV
V
Test Circuits and Waveforms
GND / V
CC
RE / RE
B
A
R
RO
15pF
B
0V
A
t
PLH
SIGNAL
GENERATORS
RO
50%
t
PHL
V
OH
50%
V
OL
0V
-0.5V
+0.5V
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. RECEIVER PROPAGATION DELAY AND DATA RATE
FN7869 Rev 0.00
October 21, 2011
Page 5 of 12
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