nvt2003 NXP Semiconductors, nvt2003 Datasheet - Page 8

• Manufacturer Part Number: nvt2003
• Description: Bidirectional Voltage-level Translator For Open-drain And Push-pull Applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
NVT2003_04_06
Product data sheet
7.2 Bidirectional translation
For the bidirectional clamping configuration (higher voltage to lower voltage or lower
voltage to higher voltage), the EN input must be connected to VREFB and both pins pulled
to HIGH side V
regulate the EN input. A filter capacitor on VREFB is recommended. The master output
driver can be totem pole or open-drain (pull-up resistors may be required) and the slave
device output can be totem pole or open-drain (pull-up resistors are required to pull the Bn
outputs to V
the outputs must be 3-stateable and be controlled by some direction-control mechanism
to prevent HIGH-to-LOW contentions in either direction. If both outputs are open-drain, no
direction control is needed.
The reference supply voltage (V
voltage. When VREFB is connected through a 200 k resistor to a 3.3 V to 5.5 V V
power supply, and V
has a maximum output voltage equal to VREFA, and the output of each Bn has a
maximum output voltage equal to V
Fig 10. Bidirectional translation to multiple higher voltage levels
1.8 V
1.5 V
1.2 V
1.0 V
V
CORE
pu(D)
CPU I/O
pu(D)
All information provided in this document is subject to legal disclaimers.
). However, if either output is totem-pole, data must be unidirectional or
through a pull-up resistor (typically 200 k). This allows VREFB to
ref(A)
Rev. 2 — 29 March 2011
is set between 1.0 V and (V
VREFA
ref(A)
A1
A2
A3
A4
A5
A6
An
NVT20XX
pu(D)
SW
SW
SW
SW
SW
SW
SW
GND
) is connected to the processor core power supply
.
B1
B2
B3
B4
B5
B6
Bn
EN
VREFB
200 kΩ
Bidirectional voltage-level translator
pu(D)
NVT2003/04/06
 1 V), the output of each An
CHIPSET I/O
CHIPSET I/O
© NXP B.V. 2011. All rights reserved.
V
V
CC
CC
5 V
totem pole or
open-drain I/O
3.3 V
002aae133
pu(D)
8 of 28