NVT2001; NVT2002
Bidirectional voltage level translator for open-drain and push-pull applications
Rev. 2 — 26 October 2011 Product data sheet
1. General description
The NVT2001/02 are bidirectional voltage level translators operational from 1.0 V to 3.6 V (Vref(A)) and 1.8 V to 5.5 V (Vref(B)), which allow bidirectional voltage translations between 1.0 V and 5 V without the need for a direction pin in open-drain or push-pull applications. Bit widths ranging from 1-bit or 2-bit are offered for level translation application with transmission speeds < 33 MHz for an open-drain system with a 50 pF capacitance and a pull-up of 197 . When the An or Bn port is LOW, the clamp is in the ON-state and a low resistance connection exists between the An and Bn ports. The low ON-state resistance (Ron) of the switch allows connections to be made with minimal propagation delay. Assuming the higher voltage is on the Bn port when the Bn port is HIGH, the voltage on the An port is limited to the voltage set by VREFA. When the An port is HIGH, the Bn port is pulled to the drain pull-up supply voltage (Vpu(D)) by the pull-up resistors. This functionality allows a seamless translation between higher and lower voltages selected by the user without the need for directional control. When EN is HIGH, the translator switch is on, and the An I/O are connected to the Bn I/O, respectively, allowing bidirectional data flow between ports. When EN is LOW, the translator switch is off, and a high-impedance state exists between ports. The EN input circuit is designed to be supplied by Vref(B). To ensure the high-impedance state during power-up or power-down, EN must be LOW. All channels have the same electrical characteristics and there is minimal deviation from one output to another in voltage or propagation delay. This is a benefit over discrete transistor voltage translation solutions, since the fabrication of the switch is symmetrical. The translator provides excellent ESD protection to lower voltage devices, and at the same time protects less ESD-resistant devices.
2. Features and benefits
Provides bidirectional voltage translation with no direction pin Less than 1.5 ns maximum propagation delay Allows voltage level translation between: 1.0 V Vref(A) and 1.8 V, 2.5 V, 3.3 V or 5 V Vref(B) 1.2 V Vref(A) and 1.8 V, 2.5 V, 3.3 V or 5 V Vref(B) 1.8 V Vref(A) and 3.3 V or 5 V Vref(B) 2.5 V Vref(A) and 5 V Vref(B) 3.3 V Vref(A) and 5 V Vref(B)
NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
Low 3.5 ON-state connection between input and output ports provides less signal distortion 5 V tolerant I/O ports to support mixed-mode signal operation High-impedance An and Bn pins for EN = LOW Lock-up free operation Flow through pinout for ease of printed-circuit board trace routing ESD protection exceeds 4 kV HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 Packages offered: TSSOP, XQFN, XSON
3. Ordering information
Table 1. Ordering information Tamb = 40 C to +85 C. Type number NVT2001GM NVT2002DP[2] NVT2002GD[2] NVT2002GF[2] Topside mark N1X[1] N2002 N02 N2 Number Package of bits Name 1 2 2 2 XSON6 TSSOP8 XSON8U XSON8 Description Version
plastic extremely thin small outline package; no leads; SOT886 6 terminals; body 1 1.45 0.5 mm plastic thin shrink small outline package; 8 leads; body width 3 mm SOT505-1
plastic extremely thin small outline package; no leads; SOT996-2 8 terminals; UTLP based; body 3 2 0.5 mm extremely thin small outline package; no leads; 8 terminals; body 1.35 1 0.5 mm SOT1089
[1] [2]
‘X’ will change based on date code. GTL2002 = NVT2002.
4. Functional diagram
VREFA VREFB
NVT20xx
EN A1 SW B1
An
SW
Bn
GND
002aae132
Fig 1.
Logic diagram of NVT2001; NVT2002 (positive logic)
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
5. Pinning information
5.1 Pinning
5.1.1 1-bit in XSON6 package
NVT2001GM
GND 1 6 EN
VREFA
2
5
VREFB
A1
3
4
B1
002aae211
Transparent top view
Fig 2.
Pin configuration for XSON6
5.1.2 2-bit in TSSOP8, XSON8U and XSON8 packages
GND VREFA GND VREFA A1 A2 1 2 3 4
002aae214
1 2
8 7
EN VREFB B1 B2
8 7
EN VREFB B1 B2
NVT2002GD
A1 A2 3 4 6 5
NVT2002DP
6 5
002aae215
Transparent top view
Fig 3.
Pin configuration for TSSOP8
Fig 4.
Pin configuration for XSON8U
GND VREFA A1 A2
1 2 3 4
8 7 6 5
EN VREFB B1 B2
NVT2002GF
002aaf317
Transparent top view
Fig 5.
Pin configuration for XSON8
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
5.2 Pin description
Table 2. Symbol GND VREFA A1 A2 B1 B2 VREFB EN
[1] [2]
Pin description Pin NVT2001[1] 1 2 3 4 5 6 NVT2002[2] 1 2 3 4 6 5 7 8 ground (0 V) low-voltage side reference supply voltage for An low-voltage side; connect to VREFA through a pull-up resistor high-voltage side; connect to VREFB through a pull-up resistor high-voltage side reference supply voltage for Bn switch enable input; connect to VREFB and pull-up through a high resistor Description
1-bit NVT2001 available in XSON6 package. 2-bit NVT2002 available in TSSOP8, XSON8U, XSON8 packages.
6. Functional description
Refer to Figure 1 “Logic diagram of NVT2001; NVT2002 (positive logic)”.
6.1 Function table
Table 3. Function selection (example) H = HIGH level; L = LOW level. Input EN[1] H L
[1]
Function An = Bn disconnect
EN is controlled by the Vref(B) logic levels and should be at least 1 V higher than Vref(A) for best translator operation.
NVT2001_NVT2002
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NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
7. Application design-in information
The NVT2001/02 can be used in level translation applications for interfacing devices or systems operating at different interface voltages with one another. The NVT2001/02 is ideal for use in applications where an open-drain driver is connected to the data I/Os. The NVT2001/02 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.
Vpu(D) = 3.3 V(1)
200 kΩ
Vref(A) = 1.8 V(1) VREFA 2
NVT2002
8 EN 7 VREFB
RPU
RPU
VCC SCL I2C-BUS MASTER SDA GND
RPU
RPU
VCC A1 3 SW 6 B1 SCL I2C-BUS DEVICE SDA GND
A2
4
SW 1 GND
5
B2
002aae134
(1) The applied voltages at Vref(A) and Vpu(D) should be such that Vref(B) is at least 1 V higher than Vref(A) for best translator operation.
Fig 6.
Typical application circuit (switch always enabled)
Table 4. Application operating conditions Refer to Figure 6. Symbol Vref(B) VI(EN) Vref(A) Isw(pass) Iref Tamb
[1]
Parameter reference voltage (B) input voltage on pin EN reference voltage (A) pass switch current reference current ambient temperature
Conditions
Min Vref(A) + 0.6 Vref(A) + 0.6 0 -
Typ[1] 2.1 2.1 1.5 14 5 -
Max 5 5 4.4 +85
Unit V V V mA A C
transistor operating in free-air
40
All typical values are at Tamb = 25 C.
NVT2001_NVT2002
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Product data sheet
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NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
3.3 V enable signal(1) on off
200 kΩ (2)
Vpu(D) = 3.3 V
Vref(A) = 1.8 V(1) VREFA 2
NVT2002
8 EN 7 VREFB
RPU
RPU
RPU
RPU
VCC SCL I2C-BUS MASTER SDA GND A1 3 SW 6 B1
VCC SCL I2C-BUS DEVICE SDA GND
A2
4
SW 1 GND
5
B2
002aae135
(1) In the Enabled mode, the applied enable voltage VI(EN) and the applied voltage at Vref(A) should be such that Vref(B) is at least 1 V higher than Vref(A) for best translator operation. (2) Note that the enable time and the disable time are essentially controlled by the RC time constant of the capacitor and the 200 k resistor on the EN pin.
Fig 7.
Typical application circuit (switch enable control)
1.8 V 1.5 V 1.2 V 1.0 V
5V
200 kΩ
NVT20XX
EN VREFA VCORE A1 CPU I/O A2 SW B2 SW B1 VREFB VCC
totem pole or open-drain I/O
CHIPSET I/O
3.3 V VCC CHIPSET I/O A4 SW B4
A3
SW
B3
A5
SW
B5
A6
SW
B6
An
SW GND
Bn
002aae133
Fig 8.
NVT2001_NVT2002
Bidirectional translation to multiple higher voltage levels
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Product data sheet
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NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
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 Vpu(D) through a pull-up resistor (typically 200 k). This allows VREFB to 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 Vpu(D)). However, if either output is totem-pole, data must be unidirectional or 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 (Vref(A)) is connected to the processor core power supply voltage. When VREFB is connected through a 200 k resistor to a 3.3 V to 5.5 V Vpu(D) power supply, and Vref(A) is set between 1.0 V and (Vpu(D) 1 V), the output of each An has a maximum output voltage equal to VREFA, and the output of each Bn has a maximum output voltage equal to Vpu(D).
7.3 Sizing pull-up resistor
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: V pu D – 0.35 V R PU = ------------------------------------0.015 A Table 5 summarizes resistor reference voltages and currents at 15 mA, 10 mA, and 3 mA. 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.
Table 5. Pull-up resistor values Calculated for VOL = 0.35 V; assumes output driver VOL = 0.175 V at stated current. Vpu(D) 64 mA Nominal 5V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V
[1] +10 % to compensate for VCC range and resistor tolerance.
Pull-up resistor value () 32 mA %[1] Nominal +10 %[1] 310 197 143 97 77 57 15 mA Nominal +10 %[1] 341 217 158 106 85 63 465 295 215 145 115 85 10 mA Nominal +10 %[1] 512 325 237 160 127 94 1550 983 717 483 383 283 3 mA Nominal +10 %[1] 1705 1082 788 532 422 312 +10
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
7.3.1 Maximum frequency calculation
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:
• 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. 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 chip/terminating end of the wire when the transition time is shorter than the time of flight of the wire because the NVT20xx looks like a high-impedance compared to the wire. If the wire is not too long and the lumped capacitance is not excessive the signal will only be slightly degraded by the series resistance added by passing through the NVT20xx. If the lumped capacitance is large the rise time will deteriorate, the fall time is much less affected and if the rise time is slowed down too much the duty cycle of the clock will be degraded and at some point the clock will no longer be useful. So the principle design consideration is to minimize the wire length and the capacitance on the 1.8 V side for the clock path. A pull-up resistor on the 1.8 V side can also be used to trade a slower fall time for a faster rise time and can also reduce the overshoot in some cases. 7.3.1.1 Example maximum frequency Question — We need to make the PLL area of a new line card backwards compatible and need to need to convert one GTL signal to LVTTL, invert it, and convert it back to GTL. The signal we want to convert is random in nature but will mostly be around 19 MHz with very long periods of inactivity where either a HIGH or LOW state will be maintained. The traces are 1 or 2 inches long with trace capacitance of about 2 pF per inch. Answer — The frequency of the NVT20xx is limited by the capacitance of the part, the capacitance of the traces and the pull-up resistors used. The limiting case is probably the LOW-to-HIGH transition in the GTL to LVTTL direction, and there the use of the lowest acceptable resistor values will minimize the rise time delay. Assuming 50 pF capacitance and 220 resistance, the RC time constant is 11 ns (50 pF 220 ). With 19 MHz corresponding to 50 ns period the NVT20xx will support this application.
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
8. Limiting values
Table 6. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Over operating free-air temperature range. Symbol Vref(A) Vref(B) VI VI/O Ich IIK IOK Tstg
[1] [2]
Parameter reference voltage (A) reference voltage (B) input voltage voltage on an input/output pin channel current (DC) input clamping current output clamping current storage temperature
Conditions
Min 0.5 0.5 0.5[1] 0.5[1] -
Max +6 +6 +6 +6 128 +50 +150
Unit V V V V mA mA mA C
VI < 0 V
[2]
50 50 65
The input and input/output negative voltage ratings may be exceeded if the input and input/output clamp current ratings are observed. Low duty cycle pulses, not DC because of heating.
9. Recommended operating conditions
Table 7. Symbol VI/O Vref(A) Vref(B) VI(EN) Isw(pass) Tamb
[1]
Operating conditions Parameter voltage on an input/output pin reference voltage (A) reference voltage (B) input voltage on pin EN pass switch current ambient temperature operating in free-air Conditions An, Bn VREFA VREFB
[1] [1]
Min 0 0 0 0 40
Max 5.5 5.4 5.5 5.5 64 +85
Unit V V V V mA C
Vref(A) Vref(B) 1 V for best results in level shifting applications.
10. Static characteristics
Table 8. Static characteristics Tamb = 40 C to +85 C, unless otherwise specified. Symbol VIK IIH Ci(EN) Cio(off) Cio(on) Parameter input clamping voltage HIGH-level input current input capacitance on pin EN off-state input/output capacitance on-state input/output capacitance Conditions II = 18 mA; VI(EN) = 0 V VI = 5 V; VI(EN) = 0 V VI = 3 V or 0 V An, Bn; VO = 3 V or 0 V; VI(EN) = 0 V An, Bn; VO = 3 V or 0 V; VI(EN) = 3 V Min Typ[1] 7.1 4 9.3 Max 1.2 5 6 12.5[2] Unit V A pF pF pF
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
Table 8. Static characteristics …continued Tamb = 40 C to +85 C, unless otherwise specified. Symbol Ron Parameter ON-state resistance Conditions An, Bn; VI = 0 V; IO = 64 mA; VI(EN) = 4.5 V VI = 2.4 V; IO = 15 mA; VI(EN) = 4.5 V
[1] [2] [3] [4] [5] All typical values are at Tamb = 25 C. Not production tested, maximum value based on characterization data of typical parts. Measured by the voltage drop between the An and Bn terminals at the indicated current through the switch. ON-state resistance is determined by the lowest voltage of the two terminals. See curves in Figure 9 for typical temperature and VI(EN) behavior. Guaranteed by design.
[3][4][5]
Min 1 -
Typ[1] 2.4 4.8
Max 5.0 7.5
Unit
[3][4]
10 Ron(typ) (Ω) 8
002aaf313
8 Ron(typ) (Ω) 6
002aaf314
6
VI(EN) = 1.5 V 2.3 V 3.0 V 4.5 V
4 4 2
2
0 −40
−20
0
20
40
60
100 Tamb (°C)
80
0 −40
−20
0
20
40
60
80 100 Tamb (°C)
a. IO = 64 mA; VI = 0 V
80 Ron(typ) (Ω) 60
002aaf315
b. IO = 15 mA; VI = 2.4 V; VI(EN) = 4.5 V
80 Ron(typ) (Ω) 60
002aaf316
40
40
20
20
0 −40
−20
0
20
40
60
80 100 Tamb (°C)
0 −40
−20
0
20
40
60
80 100 Tamb (°C)
c. IO = 15 mA; VI = 2.4 V; VI(EN) = 3.0 V Fig 9.
d. IO = 15 mA; VI = 1.7 V; VI(EN) = 2.3 V
Typical ON-state resistance versus ambient temperature
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
11. Dynamic characteristics
11.1 Open-drain drivers
Table 9. Dynamic characteristics for open-drain drivers Tamb = 40 C to +85 C; VI(EN) = Vref(B); Rbias(ext) = 200 k; CVREFB = 0.1 F; unless otherwise specified. Symbol tPLH tPHL
[1]
Parameter LOW to HIGH propagation delay HIGH to LOW propagation delay
Conditions from (input) Bn to (output) An from (input) Bn to (output) An
[1]
Min
Typ
Max
Unit ns ns
Refer to Figure 12 Ron (CL + Cio(on)) Ron (CL + Cio(on))
See graphs based on Ron typical and Cio(on) + CL = 50 pF.
5.5 V
200 kΩ
002aaf348
1 V/div 6.6 V
0.1 μF
EN
VREFB
500 Ω
1.5 V swing SIGNAL GENERATOR
DUT
50 pF
Bn
450 Ω
GND An GND 40 ns/div
VREFA 1.5 V
002aaf347
Fig 10. AC test setup
Fig 11. Example of typical AC waveform
VIH VTT
RL
input
VM
VM VIL VOH
from output under test
CL
S1 S2 (open)
output
VM
VM VOL
002aab846
002aab845
a. Load circuit
S2 = translating down, and same voltage. CL includes probe and jig capacitance.
b. Timing diagram; high-impedance scope probe used
All input pulses are supplied by generators having the following characteristics: PRR 10 MHz; Zo = 50 ; tr 2 ns; tf 2 ns. The outputs are measured one at a time, with one transition per measurement.
Fig 12. Load circuit for outputs
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
12. Performance curves
tPLH up-translation is typically dominated by the RC time constant, i.e., CL(tot) RPU = 50 pF 197 = 9.85 ns, but the Ron CL(tot) = 50 pF 5 = 0.250 ns. tPHL is typically dominated by the external pull-down driver + Ron, which is typically small compared to the tPLH in an up-translation case. Enable/disable times are dominated by the RC time constant on the EN pin since the transistor turn off is on the order of ns, but the enable RC is on the order of ms. Fall time is dominated by the external pull-down driver with only a slight Ron addition. Rise time is dominated by the RPU CL. Skew time within the part is virtually non-existent, dominated by the difference in bond wire lengths, which is typically small compared to the board-level routing differences. Maximum data rate is dominated by the system capacitance and pull-up resistors.
0.8 tPD (ns) 0.6
(1)
002aaf349
(2)
0.4
(3) (4) (5)
0.2
0 0 20 40 60 80 C (pF) 100
(1) VI(EN) = 1.5 V; IO = 64 mA; VI = 0 V. (2) VI(EN) = 4.5 V; IO = 15 mA; VI = 2.4 V. (3) VI(EN) = 2.3 V; IO = 64 mA; VI = 0 V. (4) VI(EN) = 3.0 V; IO = 64 mA; VI = 0 V. (5) VI(EN) = 4.5 V; IO = 64 mA; VI = 0 V.
Fig 13. Typical capacitance versus propagation delay
NVT2001_NVT2002
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NVT2001; NVT2002
Bidirectional voltage level translator
13. Package outline
XSON6: plastic extremely thin small outline package; no leads; 6 terminals; body 1 x 1.45 x 0.5 mm SOT886
b 1 2 3 4× L1 L
(2)
e
6 e1
5 e1
4
6×
(2)
A
A1 D
E
terminal 1 index area 0 DIMENSIONS (mm are the original dimensions) UNIT mm A (1) max 0.5 A1 max 0.04 b 0.25 0.17 D 1.5 1.4 E 1.05 0.95 e 0.6 e1 0.5 L 0.35 0.27 L1 0.40 0.32 1 scale 2 mm
Notes 1. Including plating thickness. 2. Can be visible in some manufacturing processes. OUTLINE VERSION SOT886 REFERENCES IEC JEDEC MO-252 JEITA EUROPEAN PROJECTION ISSUE DATE 04-07-15 04-07-22
Fig 14. Package outline SOT886 (XSON6)
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NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm
SOT505-1
D
E
A
X
c y HE vMA
Z
8
5
A2 pin 1 index
A1
(A3)
A
θ Lp L
1
e bp
4
detail X wM
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 1.1 A1 0.15 0.05 A2 0.95 0.80 A3 0.25 bp 0.45 0.25 c 0.28 0.15 D(1) 3.1 2.9 E(2) 3.1 2.9 e 0.65 HE 5.1 4.7 L 0.94 Lp 0.7 0.4 v 0.1 w 0.1 y 0.1 Z(1) 0.70 0.35 θ 6° 0°
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT505-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-04-09 03-02-18
Fig 15. Package outline SOT505-1 (TSSOP8)
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NXP Semiconductors
NVT2001; NVT2002
Bidirectional voltage level translator
XSON8U: plastic extremely thin small outline package; no leads; 8 terminals; UTLP based; body 3 x 2 x 0.5 mm
SOT996-2
D
B
A
E
A
A1
detail X terminal 1 index area e1 L1
1
e
b
4
v w
M M
CAB C
C y1 C y
L2
L
8 5
X
0
1 scale
2 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max 0.5 A1 0.05 0.00 b 0.35 0.15 D 2.1 1.9 E 3.1 2.9 e 0.5 e1 1.5 L 0.5 0.3 L1 0.15 0.05 L2 0.6 0.4 v 0.1 w 0.05 y 0.05 y1 0.1
OUTLINE VERSION SOT996-2
REFERENCES IEC --JEDEC JEITA ---
EUROPEAN PROJECTION
ISSUE DATE 07-12-18 07-12-21
Fig 16. Package outline SOT996-2 (XSON8U)
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Product data sheet
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NVT2001; NVT2002
Bidirectional voltage level translator
XSON8: extremely thin small outline package; no leads; 8 terminals; body 1.35 x 1 x 0.5 mm
E
SOT1089
terminal 1 index area
D
A A1
detail X
(4×)(2) e L (8×)(2) b4 5 e1
1 terminal 1 index area
8
L1 0 0.5 scale 1 mm
X
Dimensions Unit mm max nom min A(1) 0.5 A1 b D E e e1 L L1
0.35 0.40 0.04 0.20 1.40 1.05 0.15 1.35 1.00 0.55 0.35 0.30 0.35 0.27 0.32 0.12 1.30 0.95
Note 1. Including plating thickness. 2. Visible depending upon used manufacturing technology. Outline version SOT1089 References IEC JEDEC MO-252 JEITA European projection
sot1089_po
Issue date 10-04-09 10-04-12
Fig 17. Package outline SOT1089 (XSON8)
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14. Soldering of SMD packages
This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note AN10365 “Surface mount reflow soldering description”.
14.1 Introduction to soldering
Soldering is one of the most common methods through which packages are attached to Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both the mechanical and the electrical connection. There is no single soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high densities that come with increased miniaturization.
14.2 Wave and reflow soldering
Wave soldering is a joining technology in which the joints are made by solder coming from a standing wave of liquid solder. The wave soldering process is suitable for the following:
• Through-hole components • Leaded or leadless SMDs, which are glued to the surface of the printed circuit board
Not all SMDs can be wave soldered. Packages with solder balls, and some leadless packages which have solder lands underneath the body, cannot be wave soldered. Also, leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered, due to an increased probability of bridging. The reflow soldering process involves applying solder paste to a board, followed by component placement and exposure to a temperature profile. Leaded packages, packages with solder balls, and leadless packages are all reflow solderable. Key characteristics in both wave and reflow soldering are:
• • • • • •
Board specifications, including the board finish, solder masks and vias Package footprints, including solder thieves and orientation The moisture sensitivity level of the packages Package placement Inspection and repair Lead-free soldering versus SnPb soldering
14.3 Wave soldering
Key characteristics in wave soldering are:
• Process issues, such as application of adhesive and flux, clinching of leads, board
transport, the solder wave parameters, and the time during which components are exposed to the wave
• Solder bath specifications, including temperature and impurities
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14.4 Reflow soldering
Key characteristics in reflow soldering are:
• Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see Figure 18) than a SnPb process, thus reducing the process window
• Solder paste printing issues including smearing, release, and adjusting the process
window for a mix of large and small components on one board
• Reflow temperature profile; this profile includes preheat, reflow (in which the board is
heated to the peak temperature) and cooling down. It is imperative that the peak temperature is high enough for the solder to make reliable solder joints (a solder paste characteristic). In addition, the peak temperature must be low enough that the packages and/or boards are not damaged. The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 10 and 11
Table 10. SnPb eutectic process (from J-STD-020C) Package reflow temperature (C) Volume (mm3) < 350 < 2.5 2.5 Table 11. 235 220 Lead-free process (from J-STD-020C) Package reflow temperature (C) Volume (mm3) < 350 < 1.6 1.6 to 2.5 > 2.5 260 260 250 350 to 2000 260 250 245 > 2000 260 245 245 350 220 220
Package thickness (mm)
Package thickness (mm)
Moisture sensitivity precautions, as indicated on the packing, must be respected at all times. Studies have shown that small packages reach higher temperatures during reflow soldering, see Figure 18.
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temperature
maximum peak temperature = MSL limit, damage level
minimum peak temperature = minimum soldering temperature
peak temperature
time
001aac844
MSL: Moisture Sensitivity Level
Fig 18. Temperature profiles for large and small components
For further information on temperature profiles, refer to Application Note AN10365 “Surface mount reflow soldering description”.
15. Soldering: reflow soldering footprint for SOT1089
Footprint information for reflow soldering of XSON8 package SOT1089
0.15 (8×)
0.25 (8×)
0.5 (8×)
0.7
1.4
0.6 (8×)
Dimensions in mm solder paste = solder land solder resist occupied area
0.35 (3×) 1.4
sot1089_fr
Fig 19. SOT1089 reflow soldering footprint
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16. Abbreviations
Table 12. Acronym CDM ESD GTL HBM I2C-bus I/O LVTTL MM PRR RC Abbreviations Description Charged Device Model ElectroStatic Discharge Gunning Transceiver Logic Human Body Model Inter-Integrated Circuit bus Input/Output Low Voltage Transistor-Transistor Logic Machine Model Pulse Repetition Rate Resistor-Capacitor network
17. Revision history
Table 13. Revision history Release date 20111026 Data sheet status Product data sheet Change notice Supersedes NVT2001_NVT2002 v.1 Document ID NVT2001_NVT2002 v.2 Modifications:
• •
Section 2 “Features and benefits”, 10th bullet item: removed phrase “200 V MM per JESD22-A115” Type number NVT2002GM (XQFN8U, SOT902-1) removed from data sheet; this affects: – Section 2 “Features and benefits”, last bullet item: removed “XQFN” – Section 5.1.2 “2-bit in TSSOP8, XSON8U and XSON8 packages”: removed pin configuration for XQFN8U – Table 2 “Pin description”, Table note [2]: removed “XQFN8U” – Section 13 “Package outline”: removed package outline SOT902-1
•
Type number NVT2002TL (HXSON8U, SOT983-1) removed from data sheet; this affects: – Section 2 “Features and benefits”, last bullet item: removed “HXSON” – Section 5.1.2 “2-bit in TSSOP8, XSON8U and XSON8 packages”: removed pin configuration for HXSON8U – Table 2 “Pin description”, Table note [2]: removed “HXSON8U” – Section 13 “Package outline”: removed package outline SOT983-1
NVT2001_NVT2002 v.1
20100830
Product data sheet
-
-
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18. Legal information
18.1 Data sheet status
Document status[1][2] Objective [short] data sheet Preliminary [short] data sheet Product [short] data sheet
[1] [2] [3]
Product status[3] Development Qualification Production
Definition This document contains data from the objective specification for product development. This document contains data from the preliminary specification. This document contains the product specification.
Please consult the most recently issued document before initiating or completing a design. The term ‘short data sheet’ is explained in section “Definitions”. The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com.
18.2 Definitions
Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet.
malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities.
© NXP B.V. 2011. All rights reserved.
18.3 Disclaimers
Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or
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NXP Semiconductors’ specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies NXP Semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NXP Semiconductors’ standard warranty and NXP Semiconductors’ product specifications.
Non-automotive qualified products — Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NXP Semiconductors accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NXP Semiconductors’ warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond
18.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners.
19. Contact information
For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com
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20. Contents
General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1-bit in XSON6 package . . . . . . . . . . . . . . . . . . 3 2-bit in TSSOP8, XSON8U and XSON8 packages . . . . . . . . . . . . . . . . . . . . . . . 3 5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 Functional description . . . . . . . . . . . . . . . . . . . 4 6.1 Function table . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 Application design-in information . . . . . . . . . . 5 7.1 Enable and disable . . . . . . . . . . . . . . . . . . . . . . 5 7.2 Bidirectional translation . . . . . . . . . . . . . . . . . . 7 7.3 Sizing pull-up resistor . . . . . . . . . . . . . . . . . . . . 7 7.3.1 Maximum frequency calculation . . . . . . . . . . . . 8 7.3.1.1 Example maximum frequency . . . . . . . . . . . . . 8 8 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 9 9 Recommended operating conditions. . . . . . . . 9 10 Static characteristics. . . . . . . . . . . . . . . . . . . . . 9 11 Dynamic characteristics . . . . . . . . . . . . . . . . . 11 11.1 Open-drain drivers . . . . . . . . . . . . . . . . . . . . . 11 12 Performance curves . . . . . . . . . . . . . . . . . . . . 12 13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 13 14 Soldering of SMD packages . . . . . . . . . . . . . . 17 14.1 Introduction to soldering . . . . . . . . . . . . . . . . . 17 14.2 Wave and reflow soldering . . . . . . . . . . . . . . . 17 14.3 Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 17 14.4 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 18 15 Soldering: reflow soldering footprint for SOT1089 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 16 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 20 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 20 18 Legal information. . . . . . . . . . . . . . . . . . . . . . . 21 18.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21 18.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 18.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 18.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22 19 Contact information. . . . . . . . . . . . . . . . . . . . . 22 20 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 1 2 3 4 5 5.1 5.1.1 5.1.2
Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’.
© NXP B.V. 2011.
All rights reserved.
For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 26 October 2011 Document identifier: NVT2001_NVT2002