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74AHCT245BQ Datasheet PDF : 16 Pages
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NXP Semiconductors
74AHC245; 74AHCT245
Octal bus transceiver; 3-state
6. Functional description
Table 3:
Input
OE
L
L
H
Function table[1]
DIR
L
H
X
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
7. Limiting values
Input/output
An
A=B
input
Z
Bn
input
B=A
Z
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
VCC
supply voltage
VI
input voltage
IIK
input clamping current
IOK
output clamping current
IO
output current
VI < −0.5 V
VO < −0.5 V or VO > VCC + 0.5 V
VO = −0.5 V to (VCC + 0.5 V)
−0.5 +7.0 V
−0.5 +7.0 V
[1] −20
-
mA
[1] -
±20
mA
-
±25
mA
ICC
IGND
Tstg
Ptot
supply current
ground current
storage temperature
total power dissipation
SO20 package
Tamb = −40 °C to +125 °C
-
75
mA
−75 -
mA
−65 +150 °C
[2] -
500 mW
TSSOP20 package
[3] -
500 mW
DHVQFN20 package
[4] -
500 mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] Ptot derates linearly with 8 mW/K above 70 °C.
[3] Ptot derates linearly with 5.5 mW/K above 60 °C.
[4] Ptot derates linearly with 4.5 mW/K above 60 °C.
74AHC_AHCT245_3
Product data sheet
Rev. 03 — 25 September 2007
© NXP B.V. 2007. All rights reserved.
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