Datasheet

CY54FCT273T, CY74FCT273T
8-BIT REGISTERS
SCCS020A – MARCH 1995 – REVISED OCTOBER 2001
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (continued)
PARAMETER
TEST CONDITIONS
CY54FCT273T CY74FCT273T
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
I
CCD
¶
V
CC
= 5.5 V, Outputs open,
One bit switching at 50% duty cycle, MR
= V
CC
,
V
IN
≤ 0.2 V or V
IN
≥ V
CC
– 0.2 V
0.06 0.12
mA/
I
CCD
¶
V
CC
= 5.25 V, Outputs open,
One bit switching at 50% duty cycle, MR
= V
CC
,
V
IN
≤ 0.2 V or V
IN
≥ V
CC
– 0.2 V
0.06 0.12
MHz
#
V
CC
=55V
One bit switching
at f
1
= 2.5 MHz
V
IN
≤ 0.2 V or
V
IN
≥ V
CC
– 0.2 V
0.7 1.4
#
V
CC
=
5
.
5
V
,
f
0
= 10 MHz,
1
at 50% duty cycle
V
IN
= 3.4 V or GND 1.2 3.4
#
0
,
Outputs open,
MR
= V
CC
Eight bits switching
at f
1
= 2.5 MHz
V
IN
≤ 0.2 V or
V
IN
≥ V
CC
– 0.2 V
1.6 3.2
||
I
C
#
1
at 50% duty cycle
V
IN
= 3.4 V or GND 3.9 12.2
||
mA
I
C
#
V
CC
= 5 25 V
One bit switching
at f
1
= 5 MHz
V
IN
≤ 0.2 V or
V
IN
≥ V
CC
– 0.2 V
0.7 1.4
mA
V
CC
=
5
.
25
V
,
f
0
= 10 MHz,
1
at 50% duty cycle
V
IN
= 3.4 V or GND 1.2 3.4
0
,
Outputs open,
MR
= V
CC
Eight bits switching
at f
1
= 5 MHz
V
IN
≤ 0.2 V or
V
IN
≥ V
CC
– 0.2 V
1.6 3.2
||
1
at 50% duty cycle
V
IN
= 3.4 V or GND 3.9 12.2
||
C
i
5 10 5 10 pF
C
o
9 12 9 12 pF
†
Typical values are at V
CC
= 5 V, T
A
= 25°C.
¶
This parameter is derived for use in total power-supply calculations.
#
I
C
= I
CC
+ ∆I
CC
× D
H
× N
T
+ I
CCD
(f
0
/2 + f
1
× N
1
)
Where:
I
C
= Total supply current
I
CC
= Power-supply current with CMOS input levels
∆I
CC
= Power-supply current for a TTL high input (V
IN
= 3.4 V)
D
H
= Duty cycle for TTL inputs high
N
T
= Number of TTL inputs at D
H
I
CCD
= Dynamic current caused by an input transition pair (HLH or LHL)
f
0
= Clock frequency for registered devices, otherwise zero
f
1
= Input signal frequency
N
1
= Number of inputs changing at f
1
All currents are in milliamperes and all frequencies are in megahertz.
||
Values for these conditions are examples of the I
CC
formula.