CY54FCT540T, CY74FCT540T
8-BIT BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCCS029A
–
MAY 1994
–
REVISED OCTOBER 2001
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
OUTPUT
O
OEA
L
OEB
L
D
L
H
L
L
H
L
H
H
X
Z
H = High logic level, L = Low logic level,
X = Don
’
t care, Z = High-impedance state
logic diagram (positive logic)
OEA
OEB
To Seven Other Channels
D0
O0
1
19
2
18
absolute maximum rating over operating free-air temperature range (unless otherwise noted)
Supply voltage range to ground potential
DC input voltage range
DC output voltage range
DC output current (maximum sink current/pin)
Package thermal impedance,
θ
JA
(see Note 1): Q package
Ambient temperature range with power applied, T
A
Storage temperature range, T
stg
Stresses beyond those listed under
“
absolute maximum ratings
”
may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those ndicated under
“
recommended operating conditions
”
s not mplied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.
–
0.5 V to 7 V
–
0.5 V to 7 V
–
0.5 V to 7 V
120 mA
68
°
C/W
–
65
°
C to 135
°
C
–
65
°
C to 150
°
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions (see Note 2)
CY54FCT540T
MIN
NOM
CY74FCT540T
MIN
NOM
UNIT
MAX
MAX
VCC
VIH
VIL
IOH
IOL
TA
NOTE 2: All unused inputs of the device must be held at VCC
or GND to ensure proper device operation.
Supply voltage
4.5
5
5.5
4.75
5
5.25
V
High-level input voltage
2
2
V
Low-level input voltage
0.8
0.8
V
High-level output current
–
12
–
32
mA
Low-level output current
48
64
mA
°
C
Operating free-air temperature
–
55
125
–
40
85