74LVT_LVTH244A_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 3 September 2008 6 of 15
NXP Semiconductors
74LVT244A; 74LVTH244A
3.3 V octal buffer/line driver; 3-state
[1] All typical values are at T
amb
= 25 °C.
[2] Unused pins at V
CC
or GND.
[3] This is the bus hold overdrive current required to force the input to the opposite logic state.
[4] This parameter is valid for any V
CC
between 0 V and 1.2 V with a transition time of up to 10 ms. From V
CC
= 1.2 V to V
CC
= 3.3 V ± 0.3 V
a transition time of 100 µs is permitted. This parameter is valid for T
amb
= 25 °C only.
[5] I
CC
is measured with outputs pulled to V
CC
or GND.
[6] This is the increase in supply current for each input at the specified voltage level other than V
CC
or GND.
10. Dynamic characteristics
I
OZ
OFF-state output current V
CC
= 3.6 V; V
I
=V
IH
or V
IL
V
O
= 3.0 V - 1 5 µA
V
O
= 0.5 V −5 −1 −µA
I
CC
supply current V
CC
= 3.6 V; V
I
= GND or V
CC
;
I
O
=0A
output HIGH - 0.13 0.19 mA
output LOW - 3 12 mA
outputs disabled
[5]
- 0.13 0.19 mA
∆I
CC
additional supply current per input pin; V
CC
= 3.0 V to 3.6 V;
one input at V
CC
− 0.6 V and other
inputs at V
CC
or GND
[6]
- 0.1 0.2 mA
C
I
input capacitance V
I
= 0 V or 3.0 V - 4 - pF
C
O
output capacitance outputs disabled; V
O
= 0 V or 3.0 V - 8 - pF
Table 6. Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
T
amb
= −40 °C to +85 °C
[1]
t
PLH
LOW to HIGH
propagation delay
nAn to nYn; see Figure 5
V
CC
= 2.7 V - - 5.0 ns
V
CC
= 3.0 V to 3.6 V 1 2.5 4.1 ns
t
PHL
HIGH to LOW
propagation delay
nAn to nYn; see Figure 5
V
CC
= 2.7 V - - 5.1 ns
V
CC
= 3.0 V to 3.6 V 1 2.6 4.1 ns
t
PZH
OFF-state to HIGH
propagation delay
see Figure 6
V
CC
= 2.7 V - - 6.3 ns
V
CC
= 3.0 V to 3.6 V 1 3.2 5.2 ns
t
PZL
OFF-state to LOW
propagation delay
see Figure 6
V
CC
= 2.7 V - - 6.7 ns
V
CC
= 3.0 V to 3.6 V 1.1 3.1 5.2 ns
t
PHZ
HIGH to OFF-state
propagation delay
see Figure 6
V
CC
= 2.7 V - - 6.3 ns
V
CC
= 3.0 V to 3.6 V 1.9 3.3 5.6 ns
