RS2T45XVS8

RS2T45 2-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs FEATURES         DESCRIPTION Control Input threshold Referenced to VCCA Voltage Power-Supply Range: VCCA and VCCB: 1.65V to 5.5V VCC Isolation: If Either VCC is at GND, Both Ports are in the High-Impedance State Low power consumption, 4uA Max Output drives up to ±24mA@3.0V No Power-Supply Sequencing Required: Either VCCA or VCCB can be Ramped First IOFF: Supports Partial-Power-Down Mode Operation Extended Temperature: -40°C to +125°C APPLICATIONS     Industrial Enterprise Telecom, such as VOIP Personal electronic The RS2T45 is 2-bit non-inverting bus transceiver uses two separate configurable power supply rails. The A port and DIR are designed to track VCCA, which supporting operating voltages from 1.65V to 5.5V, and the B port supporting operating voltages from 1.65V to 5.5V while it tracks the VCCB supply. This allows for universal low-voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V and 5V voltage nodes. The RS2T45 is designed for asynchronous communication between two data buses. The logic levels of the directioncontrol (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated and from the B bus to the A bus when the A-port outputs are activated. The input circuitry is always active on both A and B ports and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ. The RS2T45 is available in Green SOT23-8, MSOP-8 and VSSOP-8 packages. It operates over an ambient temperature range of -40°C to +125°C. Functional Block Diagram DIR A1 5 2 7 A2 3 6 VCCA REV A.1 B1 B2 VCCB 1 / 17 www.run-ic.com RS2T45 Revision History Note: Page numbers for previous revisions may different from page numbers in the current version. VERSION Change Date A.1 2020/11/29 Change Item Initial version completed 2 / 17 www.run-ic.com RS2T45 PIN CONFIGURATIONS TOP VIEW VCCA 1 8 VCCB A1 2 7 B1 A2 3 6 B2 GND 4 5 DIR SOT23-8/MSOP-8/VSSOP-8 PIN DESCRIPTION PIN NAME TYPE (1) 1 VCCA P 2 A1 I/O Input/output A1. Reference to VCCA. 3 A2 I/O Input/output A2. Reference to VCCA. 4 GND ‒ Ground. 5 DIR I Direction control. Referenced to VCCA. 6 B2 I/O Input/output B2. Reference to VCCB. 7 B1 I/O Input/output B1. Reference to VCCB. 8 VCCB P FUNCTION SOT23-8/MSOP-8/VSSOP-8 (1) A Port Supply Voltage.1.65V ≤ VCCA ≤ 5.5V B Port Supply Voltage.1.65V ≤ VCCB ≤ 5.5V. I=input, O=output, I/O=input and output, P=power Function Table (2) CONTROL INPUTS (1) OUTPUT CIRCUITS OPERATION DIR (3) A PORT B PORT L Enabled Hi-Z B data to A bus H Hi-Z Enabled A data to B bus Note: (1) The input circuit of the data I/O is always active. (2) When either VCCA or VCCB is at GND level, the device goes into suspend mode. (3) H=High voltage level, L=Low voltage level, X=don’t care, Z=high-impedance OFF-state. 3 / 17 www.run-ic.com RS2T45 SPECIFICATIONS Absolute Maximum Ratings Over operating free-air temperature range (unless otherwise noted) (1) SYMBOL PARAMETER MIN MAX UNIT VCCA(3) Supply Voltage Range -0.5 6.5 V VCCB(3) Supply Voltage Range -0.5 6.5 V A port -0.5 6.5 B port -0.5 6.5 VI(2) Input Voltage Range VO(2) Voltage range applied to any output in the highimpedance or power-off state A port -0.5 VCCA+0.5 B port -0.5 VCCB+0.5 IIK Input clamp current VI