Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Pin description
…continued
Pin
17
18
19
20
Description
data input/output
data input/output
output enable input (active LOW)
supply voltage
Table 3:
Symbol
B1
B0
OE
V
CC
7. Functional description
7.1 Function table
Table 4:
Input
OE
L
L
H
[1]
Function table
Input/output
DIR
L
H
X
An
A=B
input
Z
Bn
input
B=A
Z
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
8. Limiting values
Table 5:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to
GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
, I
GND
T
stg
P
tot
Parameter
supply voltage
input diode current
output diode current
output source or sink
current
V
CC
or GND current
storage temperature
total power dissipation
DIP20 package
SO20, SSOP20,
TSSOP20 and
DHVQFN20 packages
[1]
For DIP20 packages: above 70
°C,
P
tot
derates linearly with 12 mW/K.
For SO20 packages: above 70
°C,
P
tot
derates linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60
°C,
P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
°C,
P
tot
derates linearly with 4.5 mW/K.
Conditions
V
I
<
−0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
−0.5
V or
V
O
> V
CC
+ 0.5 V
V
O
=
−0.5
V to V
CC
+ 0.5 V
Min
−0.5
-
-
-
-
−65
-
-
Max
+7
±20
±20
±35
±70
+150
750
500
Unit
V
mA
mA
mA
mA
°C
mW
mW
9397 750 14502
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 31 January 2005
5 of 22
PHILIPS [ NXP SEMICONDUCTORS ]
