These devices are BiCMOS interface ICs that are user configured as either a single RS-422, RS-485 differential transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver.
In RS-232 mode, the on-board charge pump generates RS-232 compliant ±5V Tx output levels, from a supply as low as 4.5V. Four small 0.1µF capacitors are required for the charge pump. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V, and the Tx outputs handling ±12V.
In RS-485 mode, the transceivers support both the RS-485 and RS-422 differential communication standards. The RS-485 receiver features "full fail-safe" operation, so the Rx output remains in a high state if the inputs are open or shorted together. The RS-485 transmitter supports up to three data rates, two of which are slew rate limited for problem free communications. The charge pump disables in RS-485 mode, thereby saving power, minimizing noise, and eliminating the charge pump capacitors.
Both RS-232, RS-485 modes feature loopback and shutdown functions. The loopback mode internally connects the Tx outputs to the corresponding Rx input, which facilitates the implementation of board level self test functions. The outputs remain connected to the loads during loopback, so connection problems (e.g., shorted connectors or cables) can be detected. The shutdown mode disables the Tx and Rx outputs, disables the charge pump if in RS-232 mode, and places the IC in a low current (35µA) mode.
The ISL41387 is a QFN packaged device that offers additional functionality, including a lower speed and edge rate option (115kbps) for EMI sensitive designs, or to allow longer bus lengths. It also features a logic supply voltage pin (VL) that sets the VOH level of logic outputs, and the switching points of logic inputs, to be compatible with another supply voltage in mixed voltage systems. The QFN's choice of active high or low Rx enable pins increases design flexibility,
IC TRANSCEIVER HALF 2/2 20SOIC Product overview: ISL81387IBZ-T from Renesas Electronics Corporation is an Interface Transceiver IC for serial communication, bus conversion, signal driving, receiver stages, and industrial networking. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include key electrical ratings, package details, and application requirements. Search-friendly keywords include interface IC, transceiver, driver, receiver, CAN, RS-485, Interface Transceiver IC, Drivers, Receivers, Transceivers. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 710-ISL81387IBZ-T can be used for catalog matching and distributor lookup.
Manufacturer: Intersil
Win Source Part Number: 777429-ISL81387IBZ-T
Packaging: Reel package
Type: Transceiver
Operating Temperature Range: -40°C ~ 85°C
Package: 20-SOIC (0.295", 7.50mm Width)
Mounting: SMD
Operating Supply Voltage: 4.5 V ~ 5.5 V
Protocol: RS232, RS422, RS485
Number of Drivers/Receivers: 2/2
Duplex: Half
Receiver Hysteresis: 35mV
Data Rate: 20Mbps
Family Name: ISL81387
Categories: Integrated Circuits (ICs)
Manufacturer Package: 20-SOIC
Alternative Parts (Cross-Reference): ISL81387IB; ISL81387IBZ;
Introduction Date: March 07, 2005
ECCN: EAR99
Country of Origin: Philippines
Estimated EOL Date: 2026
Halogen Free: Compliant
Popularity: Medium
Fake Threat In the Open Market: 64 pct.
Supply and Demand Status: Balance
RS-422/RS-485 Interface IC W/ANNEAL SINGLE 5V MULTIPROTOCOL TRANSC
IC TRANSCEIVER HALF 2/2 20SOIC
RS232-RS485 DRIVER, FULL REEL; Device Type:RS232 / RS485 Transceiver; IC Interface Type:RS232, RS485; No. of Drivers:1Drivers; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Driver Case Style:SOIC; No. of Pins:20Pins; MSL:- RoHS Compliant: Yes
RS232,RS485 TRANSCEIVER, 5.5V, SOIC-20; Device Type:RS232 / RS485 Transceiver; IC Interface Type:RS232, RS485; No. of Drivers:1Drivers; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Driver Case Style:SOIC; No. of Pins:20Pins RoHS Compliant: Yes
| Renesas Electronics Corporation | ERSAELECTRONICS PTE. LTD. | Win Source Electronics | VAST STOCK CO., LIMITED | Shenzhen Shengyu Electronics Technology Limited | Newark, An Avnet Company | |
|---|---|---|---|---|---|---|
| Product Category | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces |
| Product Number | ISL81387IBZ-T | 710-ISL81387IBZ-T | 777429-ISL81387IBZ-T | ISL81387IBZ-T | ISL81387IBZ-T | 80K5940 |
| Product Name | ±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers | Interface Transceiver IC | Interface - Interface - Drivers, Receivers, Transceivers - ISL81387IBZ-T | RS-422/RS-485 Interface IC | Integrated Circuits (ICs) - Interface - Drivers, Receivers, Transceivers | Rs232-Rs485 Driver, Full Reel; Device Type Renesas |
| Technology | RS232; RS485 | RS232; RS422; RS485; RS232, RS422, RS485 | ||||
| Device Type | Transceiver | Transceiver | Receiver; Transceiver | Receiver; Sensor Interface | ||
| Package Type | SOIC; SSOP | Tape & Reel (TR) | SOIC | SOIC-20 | SOIC | |
| Features | RoHS | RoHS | RoHS | |||
| Supply Voltage | Other; 4.5V ~ 5.5V | Other; 4.5 V ~ 5.5 V | 5V | Other | Other; 4.5V |
