NVT2002 PHILIPS [NXP Semiconductors], NVT2002 Datasheet - Page 7

• Manufacturer Part Number: NVT2002
• Description: Bidirectional voltage level translator for open-drain and push-pull applications
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
Table 5.
Calculated for V
[1]
NVT2001_NVT2002
Product data sheet
V
5 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
pu(D)
+10 % to compensate for V
Nominal
Pull-up resistor values
OL
64 mA
7.2 Bidirectional translation
7.3 Sizing pull-up resistor
= 0.35 V; assumes output driver V
+10 %
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
The pull-up resistor value needs to limit the current through the pass transistor when it is
in the ON state to about 15 mA. This ensures a pass voltage of 260 mV to 350 mV. If the
current through the pass transistor is higher than 15 mA, the pass voltage also is higher in
the ON state. To set the current through each pass transistor at 15 mA, the pull-up resistor
value is calculated as:
Table 5
The resistor values shown in the +10 % column or a larger value should be used to
ensure that the pass voltage of the transistor would be 350 mV or less. The external driver
must be able to sink the total current from the resistors on both sides of the NVT20xx
device at 0.175 V, although the 15 mA only applies to current flowing through the
NVT20xx device.
R
PU
[1]
CC
=
range and resistor tolerance.
V
------------------------------------- -
summarizes resistor reference voltages and currents at 15 mA, 10 mA, and 3 mA.
Nominal
pu D
 
0.015 A
pu(D)
–
32 mA
pu(D)
All information provided in this document is subject to legal disclaimers.
0.35 V
). However, if either output is totem-pole, data must be unidirectional or
+10 %
through a pull-up resistor (typically 200 k). This allows VREFB to
ref(A)
Rev. 2 — 26 October 2011
[1]
OL
Pull-up resistor value ()
is set between 1.0 V and (V
= 0.175 V at stated current.
Nominal
310
197
143
ref(A)
97
77
57
15 mA
pu(D)
) is connected to the processor core power supply
.
+10 %
341
217
158
106
85
63
[1]
NVT2001; NVT2002
Nominal
Bidirectional voltage level translator
465
295
215
145
115
85
pu(D)
10 mA
 1 V), the output of each An
+10 %
512
325
237
160
127
94
[1]
Nominal
© NXP B.V. 2011. All rights reserved.
1550
983
717
483
383
283
3 mA
+10 %
1705
1082
532
312
788
422
pu(D)
7 of 23
[1]