The Renesas RS485/422 transceiver, part number 94AC1627, operates at a data rate of 0.25 Mbps and is designed for balanced communication in RS-485 and RS-422 applications. It features a single 3.3V power supply and is capable of supporting up to 256 devices on the bus due to its low bus current characteristics, presenting a true "1/8 unit load." The device includes ±15kV ESD protection on the RS-485 I/O pins, ensuring reliability in electrically noisy environments. This transceiver supports both half and full duplex configurations, with hot plug capability that allows the Tx and Rx outputs to remain in a high impedance state during power-up. The receiver incorporates a full fail-safe design, ensuring a logic high output under floating or shorted conditions. Additionally, the device is RoHS compliant and available in a 14-pin SOIC package, making it suitable for various applications including automated utility meter reading systems and industrial control networks.
The Intersil ISL317xE are ±15kV IEC61000 ESD protected, 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. 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 using 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 ISL3170E through ISL3175E 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 ISL3170E, ISL3171E, ISL3173E, ISL3174E, ISL3176E, ISL3177E 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 Ld packages.
PB-FREE IEC6100 ESD 14LD SOIC,-40+85,3V
PB-FREE IEC6100 ESD 14LD SOIC,-40+85,3V
PB-FREE IEC6100 ESD 14LD SOIC,-40+85,3V
RS-422/RS-485 Interface IC IEC6100 ESD 14LD 3V RS-485 TRANS 1TX/1RX
TRANSCEIVER, RS485/422, 0.25MSPS, 14SOIC; Device Type:RS422 / RS485 Transceiver; IC Interface Type:RS422, RS485; No. of Drivers:1Drivers; Supply Voltage Min:3V; Supply Voltage Max:3.6V; Driver Case Style:SOIC; No. of Pins:14Pins; RoHS Compliant: Yes
| Renesas Electronics Corporation | RS Components, Ltd. | VAST STOCK CO., LIMITED | Newark, An Avnet Company | |
|---|---|---|---|---|
| Product Category | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces |
| Product Number | ISL3170EIBZ | 2643587 | ISL3170EIBZ | 94AC1627 |
| Product Name | ±15kV ESD Protected, 3.3V, Full-duplex, 250kbps RS-485/RS-422 Transceiver with Tx/Rx enable | Line Interface ICs | RS-422/RS-485 Interface IC | Transceiver, Rs485/422, 0.25Msps, 14Soic; Device Type Renesas |
| Technology | RS422; RS485 | |||
| Device Type | Transceiver | Receiver; Transmitter; Transceiver; Transceiver | ||
| Features | ESD Protected | RoHS; ESD Protected | RoHS | RoHS |
| Supply Voltage | 3V; 3.6V | 3.3V | Other; 3V | |
| Data Rate | 250 kbps |
