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Part Number: ISL83078E
Description: The Intersil ISL8307XE are BiCMOS 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for ...
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ISL83078E
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DataSheet
General Description
ISL83078E General Description
The Intersil ISL8307XE are BiCMOS 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125A/-100A), so they present a true "1/8 unit load" to the RS-485 bus. This allows up to 256 transceivers on the network without violating the RS-485 specification's 32 unit load maximum, and without using repeaters. For example, in a remote utility meter reading system, individual meter readings are routed to a concentrator via an RS-485 network, so the high allowed node count minimizes the number of repeaters required.
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.
Hot Plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes.
The ISL83070E through ISL83075E utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Slew rate limited versions also include receiver input filtering to enhance noise immunity in the presence of slow input signals.
The ISL83070E, ISL83071E, ISL83073E, ISL83076E, ISL83077E are configured for full duplex (separate Rx input and Tx output pins) applications. The half duplex versions multiplex the Rx inputs and Tx outputs to allow transceivers with output disable functions in 8 lead packages.
ISL83078E Maximum Ratings
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Input / Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V)
Short Circuit Duration
Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Input / Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V)
Short Circuit Duration
Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
ISL83078E Features
* Pb-Free Plus Anneal (RoHS Compliant)
* RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
* Full Fail-safe (Open, Short, Terminated/Floating) Receivers
* Hot Plug - Tx and Rx Outputs Remain Three-state During Power-up
* True 1/8 Unit Load Allows up to 256 Devices on the Bus
* Single 3.3V Supply
* High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 20Mbps
* Low Quiescent Supply Current . . . . . . . . . . 800A (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . 10nA
* -7V to +12V Common Mode Input/Output Voltage Range
* Half and Full Duplex Pinouts
* Three State Rx and Tx Outputs Available
* Current Limiting and Thermal Shutdown for driver Overload Protection
* Tiny MSOP package offering saves 50% board space
* RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
* Full Fail-safe (Open, Short, Terminated/Floating) Receivers
* Hot Plug - Tx and Rx Outputs Remain Three-state During Power-up
* True 1/8 Unit Load Allows up to 256 Devices on the Bus
* Single 3.3V Supply
* High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 20Mbps
* Low Quiescent Supply Current . . . . . . . . . . 800A (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . 10nA
* -7V to +12V Common Mode Input/Output Voltage Range
* Half and Full Duplex Pinouts
* Three State Rx and Tx Outputs Available
* Current Limiting and Thermal Shutdown for driver Overload Protection
* Tiny MSOP package offering saves 50% board space
ISL83078E Typical Application
* Automated Utility Meter Reading Systems
* High Node Count Systems
* Field Bus Networks
* Security Camera Networks
* Building Environmental Control/ Lighting Systems
* Industrial/Process Control Networks
* High Node Count Systems
* Field Bus Networks
* Security Camera Networks
* Building Environmental Control/ Lighting Systems
* Industrial/Process Control Networks
ISL83078E Connection Diagram
ISL83078E
PDF/DataSheet Download
- Datasheet: ISL83078E
- File Size: 824022 KB
- Manufacturer: INTERSIL
- Click here to Download
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ISL83078E Relative Products
ISL83077EIBZA-T
TXRX ESD RS-485/422 LP 8-SOIC
ISL83077EIBZA
IC TXRX RS485/422 3.3V HS 8-SOIC
ISL83077E
The Intersil ISL8307XE are BiCMOS 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125mA/-100mA), so they present a true 1/8 unit load to the RS-485 bus. T...
ISL83076EIBZA-T
TXRX ESD RS-485/422 LP 14-SOIC
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ISL83076EIBZA
IC TXRX RS485/422 3.3V HS 14SOIC
ISL83076E
The Intersil ISL8307XE are BiCMOS 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125A/-100A), so they present a true "1/8 unit load" to the RS-485 bus. T...
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