74LVT_LVTH244A_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 3 September 2008 4 of 15
NXP Semiconductors
74LVT244A; 74LVTH244A
3.3 V octal buffer/line driver; 3-state
6. Functional description
6.1 Function table
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
[1] The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
[2] The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability.
[3] For SO20 packages: above 70 °C derate linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60 °C derate linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60 °C derate linearly with 4.5 mW/K.
8. Recommended operating conditions
Table 3. Function table
[1]
Control Input Output
nOE nAn nYn
LLL
HH
HXZ
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage −0.5 +4.6 V
V
I
input voltage
[1]
−0.5 +7.0 V
V
O
output voltage output in OFF-state or
HIGH-state
[1]
−0.5 +7.0 V
I
IK
input clamping current V
I
< 0 V - −50 mA
I
OK
output clamping current V
O
< 0 V - −50 mA
I
O
output current output in LOW-state - 128 mA
output in HIGH-state - −64 mA
T
stg
storage temperature −65 +150 °C
T
j
junction temperature
[2]
- 150 °C
P
tot
total power dissipation T
amb
= −40 to +85 °C
[3]
500 mW
Table 5. Operating conditions
Symbol Parameter Conditions Min Typ Max Unit
V
CC
supply voltage 2.7 - 3.6 V
V
I
input voltage 0 - 5.5 V
I
OH
HIGH-level output current - - −32 mA
