DATASHEET ISL43485 FN6071 Rev.2.00 3.3V, Low Power, 30Mbps, RS-485/RS-422 Transceiver Sep 19, 2018 The Renesas ISL43485 is a high speed BiCMOS 3.3V Features powered, single transceiver that meets both the RS-485 and High data rate . up to 30Mbps RS-422 standards for balanced communication. Unlike some competitive devices, this transceiver is specified for Operates from a single +3.3V supply (10% tolerance) 10% tolerance supplies (3V to 3.6V). Interoperable with 5V logic Data rates up to 30Mbps are achievable by using this Single unit load allows up to 32 devices on the bus transceiver, which features higher slew rates. Low current shutdown mode 15nA Logic inputs (for example, DI and DE) accept signals in -7V to +12V common-mode input voltage range excess of 5.5V, making them compatible with 5V logic families. Three state Rx and Tx outputs The receiver (Rx) inputs feature a fail-safe if open design, 10ns propagation delay, 1ns skew which ensures a logic high output if Rx inputs are floating. Half duplex pinout The ISL43485 presents a single unit load to the Current limiting and thermal shutdown for driver overload RS-485 bus, which allows up to 32 transceivers on the protection network. Pb-free available (RoHS compliant) The driver (Tx) outputs are short-circuit protected, even for voltages exceeding the power supply voltage. Additionally, Applications on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive. SCSI Fast 20 drivers and receivers Factory automation Related Literature Data loggers For a full list of related documents, visit our website: Security networks ISL43485 product page Building environmental control systems Industrial/process control networks Level translators Typical Operating Circuit 3.3V 3.3V 100nF 100nF 8 8 R R PU PU V V CC CC R B 1 RO RO 1 A/Y 6 6 A/Y 2 RE RE 2 V R FS R T2 T1 3 DE DE 3 B/Z 7 7 B/Z 4 DI DI 4 R B GND GND 5 5 To calculate the resistor values, refer to TB509. FN6071 Rev.2.00 Page 1 of 13 Sep 19, 2018ISL43485 Ordering Information PART NUMBER PART TAPE AND REEL PACKAGE (Notes 2, 3) MARKING TEMP. RANGE (C) (UNITS) (Note 1) (RoHS Compliant) PKG. DWG. ISL43485IBZ 43485IBZ -40 to +85 - 8 Ld SOIC M8.15 ISL43485IBZ-T 43485IBZ -40 to +85 2.5k 8 Ld SOIC M8.15 NOTES: 1. Refer to TB347 for details about reel specifications. 2. Pb-free products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. 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), see the ISL43485 product information page. For more information about MSL, see TB363. Pinout 8LD SOIC TOP VIEW RO 1 8 V CC R RE 2 7 B/Z DE 3 6 A/Y D DI 4 5 GND Pin Descriptions PIN FUNCTION RO Receiver output: RO is high if A > B by at least 0.2V RO is low if A < B by 0.2V or more RO is high if A and B are unconnected (floating). RE Receiver output enable. RO is enabled when RE is low RO is high impedance when RE is high. DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. DI Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. GND Ground connection. A/Y Noninverting receiver input and noninverting driver output. Pin is an input if DE = 0 pin is an output if DE = 1. B/Z Inverting receiver input and inverting driver output. Pin is an input if DE = 0 pin is an output if DE = 1. V System power supply input (3V to 3.6V). CC Truth Tables TRANSMITTING RECEIVING INPUTS OUTPUTS INPUTS OUTPUT RE DE DI Z Y RE DE A-B RO X 1101 00 +0.2V 1 X 1010 00 -0.2V 0 0 0 X High-Z High-Z 0 0 Inputs Open 1 1 0 X High-Z * High-Z * 1 0 X High-Z * NOTE: *Shutdown Mode 1 1 X High-Z NOTE: *Shutdown Mode FN6071 Rev.2.00 Page 2 of 13 Sep 19, 2018