NVT2002DP,118 NXP Semiconductors, NVT2002DP,118 Datasheet - Page 8

• Manufacturer Part Number: NVT2002DP,118
• Description: IC INTERFACE
• Manufacturer: NXP Semiconductors

Specifications of NVT2002DP,118

• Package / Case: 8-TSSOP (0.118", 3.00mm Width)
• Logic Function: Translator, Bidirectional, Open Drain
• Number Of Bits: 1
• Input Type: Voltage
• Output Type: Voltage
• Number Of Channels: 1
• Number Of Outputs/channel: 1
• Differential - Input:output: No/No
• Operating Temperature: -40°C ~ 85°C
• Logic Type: Voltage Level Shifter
• Supply Voltage (max): 5 V
• Supply Voltage (min): 1 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Data Rate: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-5121-2

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
7.3.1 Maximum frequency calculation
64 mA
7.3 Sizing pull-up resistor
= 0.35 V; assumes output driver V
+10 %
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.
The maximum frequency is totally dependent upon the specifics of the application and the
device can operate > 33 MHz. Basically, the NVT20xx behaves like a wire with the
additional characteristics of transistor device physics and should be capable of performing
at higher frequencies if used correctly.
Here are some guidelines to follow that will help maximize the performance of the device:
In a 3.3 V to 1.8 V direction level shift, if the 3.3 V side is being driven by a totem pole type
driver no pull-up resistor is needed on the 3.3 V side. The capacitance and line length of
concern is on the 1.8 V side since it is driven through the ON resistance of the NVT20xx.
If the line length on the 1.8 V side is long enough there can be a reflection at the
R
•
•
•
•
PU
[1]
CC
Keep trace length to a minimum by placing the NVT20xx close to the processor.
The trace length should have a time of flight less than half of the transition time to
reduce ringing and reflections.
The faster the edge of the signal, the higher the chance for ringing.
The higher the drive strength (up to 15 mA), the higher the frequency the device can
use.
=
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
–
32 mA
All information provided in this document is subject to legal disclaimers.
0.35 V
+10 %
Rev. 1 — 30 August 2010
[1]
OL
Pull-up resistor value (Ω)
= 0.175 V at stated current.
Nominal
310
197
143
97
77
57
15 mA
+10 %
341
217
158
106
85
63
[1]
NVT2001; NVT2002
Nominal
Bidirectional voltage level translator
465
295
215
145
115
85
10 mA
+10 %
512
325
237
160
127
94
[1]
Nominal
© NXP B.V. 2010. All rights reserved.
1550
983
717
483
383
283
3 mA
+10 %
1705
1082
788
532
422
312
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[1]