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SN74LVC1T45
SCES515K – DECEMBER 2003 – REVISED DECEMBER 2014
SN74LVC1T45 Single-Bit Dual-Supply Bus Transceiver With Configurable Voltage
Translation and 3-State Outputs
1 Features
3 Description
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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.
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Available in the Texas Instruments NanoFree™
Package
Fully Configurable Dual-Rail Design Allows Each
Port to Operate Over the Full 1.65-V to 5.5-V
Power-Supply Range
VCC Isolation Feature – If Either VCC Input Is at
GND, Both Ports Are in the High-Impedance State
DIR Input Circuit Referenced to VCCA
Low Power Consumption, 4-μA Max ICC
±24-mA Output Drive at 3.3 V
Ioff Supports Partial-Power-Down Mode Operation
Max Data Rates
– 420 Mbps (3.3-V to 5-V Translation)
– 210 Mbps (Translate to 3.3 V)
– 140 Mbps (Translate to 2.5 V)
– 75 Mbps (Translate to 1.8 V)
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
2 Applications
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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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
2.90 mm × 1.60 mm
SN74LVC1T45
SOT (6)
2.00 mm × 1.25 mm
1.60 mm × 1.20 mm
DSBGA (6)
1.39 mm × 0.90 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Personal Electronic
Industrial
Enterprise
Telecom
Functional Block Diagram
DIR
A
5
3
4
VCCA
B
VCCB
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
