Diodes 74LVC1T45 User Manual
Description, Features, Pin assignments
74LVC1T45
Document number: DS35804 Rev. 2 - 2
1 of 14
June 2013
© Diodes Incorporated
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.
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-A)
2000-V Human Body Model (A114-A)
1000 V Charged Device Model ( C101)
•
Latch-Up Exceeds 100mA per JESD 78, Class II
•
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)
Pin Assignments
2
4
5
6
3
1
(Top View)
X2-DFN1410-6
A
GND
B
DIR
Vcc(A)
Vcc(B)
X2-DFN1409-6
Chip Scale
Alternative
A
GND
B
DIR
Vcc(A)
Vcc(B)
1
6
5
4
3
2
(Bottom View)
(Top View )
X2-DFN1010-6
A
GND
B
1
2
3
4
5
6
DIR
Vcc(A)
Vcc(B)
B
SOT26 SOT363 SOT563
(Top View)
GND
A
4
3
2
1
6
Vcc(A)
5
Vcc(B)
DIR
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
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. Ser 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.
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