
74HC_HCT244_3 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 22 December 2005 8 of 22
Philips Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
Tamb =−40 °C to +125 °C
VIH HIGH-state input voltage VCC = 2.0 V 1.5 - - V
VCC = 4.5 V 3.15 - - V
VCC = 6.0 V 4.2 - - V
VIL LOW-state input voltage VCC = 2.0 V - - 0.5 V
VCC = 4.5 V - - 1.35 V
VCC = 6.0 V - - 1.8 V
VOH HIGH-state output voltage VI = VIH or VIL
IO=−20 µA; VCC = 2.0 V 1.9 - - V
IO=−20 µA; VCC = 4.5 V 4.4 - - V
IO=−20 µA; VCC = 6.0 V 5.9 - - V
IO=−6.0 mA; VCC = 4.5 V 3.7 - - V
IO=−7.8 mA; VCC = 6 V 5.2 - - V
VOL LOW-state output voltage VI = VIH or VIL
IO=20µA; VCC = 2.0 V - - 0.1 V
IO=20µA; VCC = 4.5 V - - 0.1 V
IO=20µA; VCC = 6.0 V - - 0.1 V
IO = 6.0 mA; VCC = 4.5 V - - 0.4 V
IO = 7.8 mA; VCC = 6 V - - 0.4 V
ILI input leakage current VI=V
CC or GND; VCC = 6 V - - ±1.0 µA
IOZ OFF-state output current VI = VIH or VIL; VO=V
CC or GND - - ±10.0 µA
ICC quiescent supply current VI=V
CC or GND; IO = 0 A;
VCC = 6.0 V - - 160 µA
Table 7: Static characteristics 74HC244
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0V).
Symbol Parameter Conditions Min Typ Max Unit
Table 8: Static characteristics 74HCT244
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Tamb =25°C
VIH HIGH-state input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - V
VIL LOW-state input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 V
VOH HIGH-state output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=−20 µA 4.4 4.5 - V
IO=−6.0 mA 3.98 4.32 - V
VOL LOW-state output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=20µA - 0 0.1 V
IO= 6.0 mA - 0.16 0.26 V
ILI input leakage current VI=V
CC or GND; VCC = 5.5 V - - ±0.1 µA
IOZ OFF-state output current per input pin; VI = VIH or VIL;
VO=V
CC or GND; other pins at GND
or VCC; IO= 0 A; VCC = 5.5 V
--±0.5 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 5.5 V - - 8.0 µA