nvt2003 NXP Semiconductors, nvt2003 Datasheet - Page 11

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

NXP Semiconductors
8. Limiting values
9. Recommended operating conditions
NVT2003_04_06
Product data sheet
7.4.1.1 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.
Table 6.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Over operating free-air temperature range.
[1]
[2]
Table 7.
[1]
Symbol
V
V
I
T
Symbol
V
V
T
V
V
I
I
V
V
I
ch
IK
OK
sw(pass)
stg
amb
ref(A)
ref(B)
I
I/O
I/O
ref(A)
ref(B)
I(EN)
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.
V
ref(A)
[1]
[1]
 V
Limiting values
Operating conditions
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
Parameter
voltage on an input/output pin
reference voltage (A)
reference voltage (B)
input voltage on pin EN
pass switch current
ambient temperature
ref(B)
All information provided in this document is subject to legal disclaimers.
 1 V for best results in level shifting applications.
Rev. 2 — 29 March 2011
[2]
An, Bn
VREFA
VREFB
operating in free-air
Conditions
Conditions
V
I
< 0 V
Bidirectional voltage-level translator
NVT2003/04/06
Min
0.5
0.5
0.5
0.5
-
50
50
65
[1]
[1]
0
0
0
Min
0
-
40
© NXP B.V. 2011. All rights reserved.
Max
+6
+6
+6
+6
128
-
+50
+150
Max
5.5
5.4
5.5
5.5
64
+85
11 of 28
Unit
V
V
V
V
mA
C
Unit
V
V
V
V
mA
mA
mA
C