74LVC1T45
SINGLE BIT DUAL POWER SUPPLY TRANSLATING
TRANSCEIVER WITH 3 STATE OUTPUTS
Description
The 74LVC1T45 is a single bit, dual supply transceiver with 3-state
outputs suitable for transmitting a single logic bit across different
voltage domains. The A input/output pin is designed to track V
CCA
while the B input/output tracks V
CCB
. This arrangement allows for
universal low-voltage translation between any voltages from 1.65V to
5.5V. The Direction pin (DIR) controls the direction of the transceiver
and in a logic voltage related to V
CCA
. When a high logic level is
applied to DIR the A pin becomes an input and the B pin becomes the
output. Conversely, the roles of A and B are reversed when DIR is
asserted low.
The 3-state feature occurs when either of the power supply voltages
are zero. This is also an Ioff feature and allows for the output to
remain in a high impedance state with both power supplies at 0V,
preventing and damaging backflow currents and providing power
down electrical isolation up to 5.5V as not to interfere with any logic
activity on pin A or B.
Pin Assignments
(Top View)
Vcc(A)
1
GND
2
A
3
6
Vcc(B)
5
DIR
4
B
(Top View)
Vcc(A)
1
GND
A
6
Vcc(B)
5
DIR
4
B
2
3
SOT26 SOT363 SOT563
(Bottom View)
A
3
GND
2
Vcc(A)
1
X2-DFN1410-6
4
B
5
DIR
6
Vcc(B)
(Top View)
Vcc(A)
1
GND
2
A
3
Vcc(B)
5
DIR
4
B
6
X2-DFN1409-6
Chip Scale
Alternative
X2-DFN1010-6
Features
Wide Supply Voltage Range:
V
CC
(A): from 1.65V to 5.5V
V
CC
(B): from 1.65V to 5.5V
± 24mA Output Drive at 3.3V
CMOS Low Power Consumption 16µA Maximum I
CC
High Noise Immunity
(100mV Hysteresis Typical)
I
OFF
Supports Partial-Power-Down Mode Operation
I
OFF
Controlled by Either V
CC
Being at 0 V
Inputs Accept up to 5.5V
ESD Protection Exceeds JESD 22
200-V Machine Model (A115)
2000-V Human Body Model (A114)
1000 V Charged Device Model ( C101)
Applications
Voltage Level Translation
Well suited to join logic types operating at different voltages
Power Down Signal Isolation
If either voltage domain is turned off the signal is isolated and
there is no loading on signal lines
Wide array of products such as:
Cell Phones, Tablets, E-Readers
PCs, Notebooks, Netbooks, Ultrabooks
Networking, Routers, Gateways
Computer Peripherals, Hard Drives, CD/DVD ROM
TV, DVD, DVR, Set-Top Box
Personal Navigation / GPS
MP3 Players, Cameras, Video Recorders
Latch-up Exceeds 100mA per JESD 78, Class I
X2-DFN1409-6 Package Designed as a Direct Replacement for
Chip Scale Packaging.
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Notes:
Click for Ordering Information
74LVC1T45
Document number: DS35804 Rev. 3 - 2
1 of 14
www.diodes.com
October 2014
© Diodes Incorporated
74LVC1T45
Pin Descriptions
Pin Name
VCC(A)
GND
A
B
DIR
VCC(B)
Pin
1
2
3
4
5
6
Ground
Data Input/Output
Data Input/Output
Direction Control
Supply for I/O pin B
Function
Supply for I/O pin A and reference for DIR
Logic Diagram
Function Tables
Input
DIR (Direction Pin)
L
H
Operation
B data to A output
A data to B output
A
*
*
L
H
Inputs
B
L
H
*
*
Outputs
DIR
L
L
H
H
A
L
H
*
*
B
*
*
L
H
*Pin condition not applicable as defined by DIR.
Absolute Maximum Ratings
(Note 4) (@T
A
= +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD CDM
ESD MM
V
CC
(A), V
CC
(B)
V
I
V
O
V
O
I
IK
I
OK
I
O
T
J
T
STG
Note:
Parameter
Human Body Model ESD Protection
Charged Device Model ESD Protection
Machine Model ESD Protection
Supply Voltage Range
Input Voltage Range
Voltage Applied to Output in High Impedance or I
OFF
State
Voltage Applied to Output in High or Low State
Input Clamp Current V
I
<0
Output Clamp Current
Continuous Output Current
Continuous Current Through V
cc
or GND
Operating Junction Temperature
Storage Temperature
A pin
B pin
Rating
2
1
200
-0.5 to +6.5
-0.5 to +6.5
-0.5 to +6.5
-0.3 to V
CC
(A) +0.5
-0.3 to V
CC
(B) +0.5
-50
-50
±50
±100
-40 to +150
-65 to +150
Unit
KV
KV
V
V
V
V
V
V
mA
mA
mA
mA
°C
°C
4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device
operation should be within recommend values.
74LVC1T45
Document number: DS35804 Rev. 3 - 2
2 of 14
www.diodes.com
October 2014
© Diodes Incorporated
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