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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Data Sheet October 18, 2007 FN6543.2
±16.5kV ESD Protected, +125°C, 3.0V to 5.5V, SOT-23/TDFN Packaged, 20Mbps, Full Fail-safe, Low Power, RS-485/RS-422 Receivers
The Intersil ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E are ±16.5kV IEC61000 ESD Protected, 3.0V to 5.5V powered, single receivers that meet both the RS-485 and RS-422 standards for balanced communication. These receivers have very low bus currents (+125µA/-100µA), so they present a true “1/8 unit load” to the RS-485 bus. This allows up to 256 receivers on the network without violating the RS-485 specification’s 32 unit load maximum and without using repeaters. Receiver inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. The ISL3280E and ISL3284E feature an always enabled Rx; the ISL3281E and ISL3285E feature an active high Rx enable pin, and the ISL3282E and ISL3283E include an active low enable pin. All versions are offered in Industrial and Extended Industrial (-40°C to +125°C) temperature ranges. A 26% smaller footprint is available with the ISL3282E and ISL3285E TDFN package. These devices, plus the ISL3284E, also feature a logic supply pin (VL) that sets the VOH level of the RO output (and the switching points of the RE / RE input) to be compatible with another supply voltage in mixed voltage systems. For companion single RS-485 transmitters in micro packages, please see the ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E data sheet.
Features
• IEC61000 ESD Protection on RS-485 Inputs . . . ±16.5kV - Class 3 ESD Level on all Other Pins . . . . . . >5kV HBM • Pb-Free (RoHS Compliant) • Wide Supply Range . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V • Specified for +125°C Operation • Logic Supply Pin (VL) Eases Operation in Mixed Supply Systems (ISL3282E, ISL3284E, ISL3285E Only) • Full Fail-safe (Open, Short, Terminated/Undriven) • True 1/8 Unit Load Allows up to 256 Devices on the Bus • High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 20Mbps • Low Quiescent Supply Current . . . . . . . . . . 500µA (Max) - Very Low Shutdown Supply Current . . . . . . 20µA (Max) • -7V to +12V Common Mode Input Voltage Range • Tri-statable Rx Available (Active Low or High EN Input) • 5V Tolerant Logic Inputs When VCC ≤ 5V
Applications
• Clock Distribution • High Node Count Systems • Space Constrained Systems • Security Camera Networks • Building Environmental Control/Lighting Systems • Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES PART NUMBER ISL3280E ISL3281E ISL3282E ISL3283E ISL3284E ISL3285E FUNCTION 1 Rx 1 Rx 1 Rx 1 Rx 1 Rx 1 Rx DATA RATE (Mbps) 20 20 20 20 20 20 # DEVICES ON BUS 256 256 256 256 256 256 RX ENABLE? NO ACTIVE HIGH ACTIVE LOW ACTIVE LOW NO ACTIVE HIGH VL PIN? NO NO YES NO YES YES QUIESCENT ICC (µA) 350 350 350 350 350 350 LOW POWER SHUTDOWN? NO YES YES YES NO YES LEAD COUNT 5-SOT 6-SOT 8-TDFN 6-SOT 6-SOT 8-TDFN
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. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Pinouts
ISL3280E (5 LD SOT-23) TOP VIEW
VCC 1 R 4 B 5 A VCC 1 R
ISL3281E (6 LD SOT-23) TOP VIEW
6 5 4 A RE B
GND 2 RO 3
GND 2 RO 3
ISL3282E (8 LD TDFN) TOP VIEW
VCC 1
ISL3283E (6 LD SOT-23) TOP VIEW
6 R 5 4 A RE B
RO GND NC VCC
1 2 3 4 R
8 7 6 5
B RE VL A
GND 2 RO 3
ISL3284E (6 LD SOT-23) TOP VIEW
VCC 1 R 6 5 4 A VL B
ISL3285E (8 LD TDFN) TOP VIEW
RO GND NC VCC
1 2 3 4 R
8 7 6 5
B RE VL A
GND 2 RO 3
2
FN6543.2 October 18, 2007
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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Ordering Information
PART NUMBER (Notes 1, 2) ISL3280EFHZ-T ISL3280EIHZ-T ISL3281EFHZ-T ISL3281EIHZ-T ISL3282EFRTZ-T ISL3282EIRTZ-T ISL3283EFHZ-T ISL3283EIHZ-T ISL3284EFHZ-T ISL3284EIHZ-T ISL3285EFRTZ-T ISL3285EIRTZ-T NOTES: 1. 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. 2. Please refer to TB347 for details on reel specifications. 3. SOT-23 “PART MARKING” is branded on the bottom side. PART MARKING (Note 3) 280F 280I 281F 281I 82F 82I 283F 283I 284F 284I 85F 85I TEMP. RANGE (°C) -40 to +125 -40 to +85 -40 to +125 -40 to +85 -40 to +125 -40 to +85 -40 to +125 -40 to +85 -40 to +125 -40 to +85 -40 to +125 -40 to +85 PACKAGE (Tape and Reel) (Pb-Free) 5 Ld SOT-23 5 Ld SOT-23 6 Ld SOT-23 6 Ld SOT-23 8 Ld TDFN 8 Ld TDFN 6 Ld SOT-23 6 Ld SOT-23 6 Ld SOT-23 6 Ld SOT-23 8 Ld TDFN 8 Ld TDFN PKG. DWG. # P5.064 P5.064 P6.064 P6.064 L8.2x3A L8.2x3A P6.064 P6.064 P6.064 P6.064 L8.2x3A L8.2x3A
3
FN6543.2 October 18, 2007
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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Truth Table
RECEIVING INPUTS RE, RE 1, 0 1, 0 1, 0 0, 1 A-B ≥ -0.05V ≤ -0.2V Inputs Open/Shorted X OUTPUT RO 1 0 1 High-Z*
NOTE: *Shutdown Mode, except for ISL3280E, ISL3284E
Pin Descriptions
PIN NAME RO RE, RE FUNCTION Receiver output: If A - B ≥ -50mV, RO is high; If A - B ≤ -200mV, RO is low; RO = High if A and B are unconnected (floating) or shorted. Receiver output enable. RO is enabled when RE/RE is high / low; RO is high impedance when RE/RE is low/high. If the Rx enable function isn’t used, connect RE directly to GND, or connect RE through a 1kΩ, or greater, resistor to VCC. RE/RE are internally pulled low/high. Ground connection. This is also the potential of the TDFN thermal pad. ±16.5kV IEC61000 ESD Protected RS-485, RS-422 level, noninverting receiver input. ±16.5kV IEC61000 ESD Protected RS-485, RS-422 level, inverting receiver input. System power supply input (3.0V to 5.5V). On devices with a VL pin, power-up VCC first. Logic-Level Supply which sets the VIL / VIH levels for the RE (ISL3282E only) and RE (ISL3285E only) pins, and sets the VOH level of the RO output (ISL3282E, ISL3284E, ISL3285E only). Power-up this supply after VCC, and keep VL ≤ VCC. No Connection.
GND A B VCC VL NC
Typical Operating Circuits
NETWORK WITH ENABLES
+3.3V TO 5V + 1 VCC ISL3281E 3 RO 5 RE A R B 6 4 RT 6 4 Y Z D 0.1µF 0.1µF + 2 VCC ISL329xE DI 1 DE 3 +3.3V
GND 2
GND 5
4
FN6543.2 October 18, 2007
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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Typical Operating Circuits (Continued)
NETWORK WITHOUT ENABLES
+3.3V TO 5V 1 VCC ISL3280E 3 RO A R B 5 4 RT 6 4 Y Z D + 0.1µF 0.1µF + 2 VCC ISL329xE DE DI 1 +3.3V 1kΩ TO 3kΩ 3
GND 2
GND 5
NETWORK WITH VL PIN FOR INTERFACE TO LOWER VOLTAGE LOGIC DEVICES
1.8V 6 VCC VL +3.3V TO 5V + 4 VCC ISL3282E
LOGIC DEVICE (µP, ASIC, UART)
+3.3V 0.1µF 0.1µF + 8 VCC ISL3298E
2.5V 1 VL VCC
1 RO 7 RE
A R B
5 8
RT
6 7
Y Z D
DI 3 DE 2
LOGIC DEVICE (μP, ASIC, UART)
GND 2
GND 4, 5
5
FN6543.2 October 18, 2007
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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Thermal Information
Thermal Resistance (Typical)
Absolute Maximum Ratings
VCC to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V VL to GND (ISL3282E, ISL3284E, ISL3285E Only). . -0.3V to (VCC +0.3V) Input Voltages RE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V Input/Output Voltages A, B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V RO (Not ISL3282E, ISL3284E, ISL3285E). . -0.3V to (VCC +0.3V) RO (ISL3282E, ISL3284E, ISL3285E) . . . . . . -0.3V to (VL +0.3V) Short Circuit Duration RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
θJA (°C/W) θJC (°C/W)
5 Ld SOT-23 Package (Note 4) . . . . . . 190 N/A 6 Ld SOT-23 Package (Note 4) . . . . . . 177 N/A 8 Ld TDFN Package (Notes 5, 6). . . . . 65 8 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
Operating Conditions
Temperature Range F Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C I Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
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.
NOTE: 4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 5. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 6. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Test Conditions: VCC = 3.0V to 5.5V; VL = VCC (ISL3282E, ISL3284E, ISL3285E only); Typicals are at TA = +25°C (Note 11); Unless Otherwise Specified (Note 7). SYMBOL TEST CONDITIONS VCC ≤ 3.6V VCC ≤ 5.5V ISL3282E and ISL3285E Only TEMP MIN TYP MAX (°C) (Note 10) (No
