NVT2008_NVT2010 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet Rev. 3 — 27 January 2014 6 of 33
NXP Semiconductors
NVT2008; NVT2010
Bidirectional voltage-level translator
6. Functional description
Refer to Figure 1 “Logic diagram of NVT2008/10 (positive logic)”.
6.1 Function table
[1] EN is controlled by the V
ref(B)
logic levels and should be at least 1 V higher than V
ref(A)
for best translator
operation.
7. Application design-in information
The NVT2008/10 can be used in level translation applications for interfacing devices or
systems operating at different interface voltages with one another. The NVT2008/10 is
ideal for use in applications where an open-drain driver is connected to the data I/Os. The
NVT2008/10 can also be used in applications where a push-pull driver is connected to the
data I/Os.
7.1 Enable and disable
The NVT20xx has an EN input that is used to disable the device by setting EN LOW,
which places all I/Os in the high-impedance state.
Table 4. Function selection (example)
H = HIGH level; L = LOW level.
Input EN
[1]
Function
HAn=Bn
L disconnect
(1) The applied voltages at V
ref(A)
and V
pu(D)
should be such that V
ref(B)
is at least 1 V higher than
V
ref(A)
for best translator operation.
Fig 7. Typical application circuit (switch always enabled)
002aae134
A1
A2
VREFA
GND
3
4
VREFB
1
6
5
B1
B2
8EN
SW
SW
NVT2002
7
200 kΩ
R
PU
R
PU
V
pu(D)
= 3.3 V
(1)
I
2
C-BUS
DEVICE
SCL
SDA
V
CC
GND
2
V
ref(A)
= 1.8 V
(1)
R
PU
R
PU
I
2
C-BUS
MASTER
SCL
SDA
V
CC
GND
