74lvc2t45 NXP Semiconductors, 74lvc2t45 Datasheet - Page 24

• Manufacturer Part Number: 74lvc2t45
• Description: Dual Supply Translating Transceiver; 3-state
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 17.
[1]
Table 18.
74LVC_LVCH2T45_2
Product data sheet
State
1
2
3
4
V
0 V
1.8 V
2.5 V
3.3 V
5.0 V
Fig 17. Bidirectional logic level-shifting application
CC(A)
H = HIGH voltage level;
L = LOW voltage level;
Z = high-impedance OFF-state.
DIR CTRL
H
H
L
L
Pull-up or pull-down only needed for 74LVC2T45.
Description of bidirectional logic level-shifting application
Typical total supply current (I
DIR CTRL
V
I/O-1
CC1
14.3 Power-up considerations
V
0 V
0
< 1
< 1
< 1
< 1
CC(B)
system-1
Table 17
and then from system-2 to system-1.
The device is designed such that no special power-up sequence is required other than
GND being applied first.
PULL-UP/DOWN
I/O-1
output
Z
Z
input
gives a sequence that will illustrate data transmission from system-1 to system-2
1.8 V
< 1
< 2
< 2
< 2
2
I/O-2
input
Z
Z
output
V
CC1
CC(A)
V
CC(A)
GND
+ I
Rev. 02 — 5 February 2009
1A
2A
CC(B)
1
2
3
4
2.5 V
< 1
< 2
< 2
< 2
< 2
Description
system-1 data to system-2
system-2 is getting ready to send data to system-1. I/O-1 and I/O-2
are disabled. The bus-line state depends on bus hold
DIR bit is set LOW. I/O-1 and I/O-2 still are disabled. The bus-line
state depends on bus hold
system-2 data to system-1
74LVCH2T45
)
74LVC2T45
74LVC2T45; 74LVCH2T45
8
7
6
5
3.3 V
< 1
< 2
< 2
< 2
< 2
V
1B
2B
DIR
Dual supply translating transceiver; 3-state
CC(B)
[1]
V
CC2
PULL-UP/DOWN
5.0 V
< 1
2
< 2
< 2
< 2
system-2
DIR CTRL
© NXP B.V. 2009. All rights reserved.
V
I/O-2
CC2
Unit
001aai932
A
A
A
A
A
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