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SN74LVC1T45DBVR Datasheet(PDF) 1 Page - Texas Instruments |
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SN74LVC1T45DBVR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page 1 FEATURES 3 2 4 6 1 VCCA VCCB B GND A DBV PACKAGE (TOP VIEW) DCK PACKAGE (TOP VIEW) 3 2 4 6 1 VCCA VCCB B GND A 3 2 4 6 1 VCCA VCCB B GND A DRL PACKAGE (TOP VIEW) See mechanical drawings for dimensions. DIR DIR DIR 5 5 5 YZP PACKAGE (BOTTOM VIEW) VCCA A VCCB B GND 1 4 2 3 6 5 DIR C1 B1 A1 C2 B2 A2 DESCRIPTION/ORDERING INFORMATION SN74LVC1T45 www.ti.com ..................................................................................................................................................... SCES515I – DECEMBER 2003 – REVISED MAY 2009 SINGLE-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS 2 • Available in the Texas Instruments NanoFree™ • Max Data Rates Package – 420 Mbps (3.3-V to 5-V Translation) • Fully Configurable Dual-Rail Design Allows – 210 Mbps (Translate to 3.3 V) Each Port to Operate Over the Full 1.65-V to – 140 Mbps (Translate to 2.5 V) 5.5-V Power-Supply Range – 75 Mbps (Translate to 1.8 V) • V CC Isolation Feature – If Either VCC Input Is at • Latch-Up Performance Exceeds 100 mA Per GND, Both Ports Are in the High-Impedance JESD 78, Class II State • ESD Protection Exceeds JESD 22 • DIR Input Circuit Referenced to V CCA – 2000-V Human-Body Model (A114-A) • Low Power Consumption, 4-µA Max I CC – 200-V Machine Model (A115-A) • ±24-mA Output Drive at 3.3 V – 1000-V Charged-Device Model (C101) • I off Supports Partial-Power-Down Mode Operation This single-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. The SN74LVC1T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (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 on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ. The SN74LVC1T45 is designed so that the DIR input is powered by VCCA. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance state. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 NanoFree is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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