Integrated Device Technology, Inc.
FAST CMOS OCTAL
TRANSPARENT
LATCHES
IDT54/74FCT373T/AT/CT/DT - 2373T/AT/CT
IDT54/74FCT533T/AT/CT
IDT54/74FCT573T/AT/CT/DT - 2573T/AT/CT
FEATURES:
• Common features:
– Low input and output leakage
≤1µA
(max.)
– CMOS power levels
– True TTL input and output compatibility
– V
OH
= 3.3V (typ.)
– V
OL
= 0.3V (typ.)
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT373T/FCT533T/FCT573T:
– Std., A, C and D speed grades
– High drive outputs (-15mA I
OH
, 48mA I
OL
)
– Power off disable outputs permit “live insertion”
• Features for FCT2373T/FCT2573T:
– Std., A and C speed grades
– Resistor output
(-15mA I
OH
, 12mA I
OL
Com.)
(-12mA I
OH
, 12mA I
OL
Mil.)
– Reduced system switching noise
DESCRIPTION:
The FCT373T/FCT2373T, FCT533T and FCT573T/
FCT2573T are octal transparent latches built using an ad-
vanced dual metal CMOS technology. These octal latches
have 3-state outputs and are intended for bus oriented appli-
cations. The flip-flops appear transparent to the data when
Latch Enable (LE) is HIGH. When LE is LOW, the data that
meets the set-up time is latched. Data appears on the bus
when the Output Enable (
OE
) is LOW. When
OE
is HIGH, the
bus output is in the high- impedance state.
The FCT2373T and FCT2573T have balanced drive out-
puts with current limiting resistors. This offers low ground
bounce, minimal undershoot and controlled output fall times-
reducing the need for external series terminating resistors.
The FCT2xxxT parts are plug-in replacements for FCTxxxT
parts.
FUNCTIONAL BLOCK DIAGRAM IDT54/74FCT373T/2373T AND IDT54/74FCT573T/2573T
D
0
D
O
G
G
D
1
D
O
G
D
2
D
O
G
D
3
D
O
G
D
4
D
O
G
D
5
D
O
G
D
6
D
O
G
D
7
D
O
LE
OE
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
2564 cnv* 01
FUNCTIONAL BLOCK DIAGRAM IDT54/74FCT533T
D
0
D
O
G
G
D
1
D
O
G
D
2
D
O
G
D
3
D
O
G
D
4
D
O
G
D
5
D
O
G
D
6
D
O
G
D
7
D
O
LE
OE
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
2564 cnv* 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1995
Integrated Device Technology, Inc.
AUGUST 1995
DSC-4216/6
6.12
1
IDT54/74FCT373T/AT/CT/DT - 2373T/AT/CT, IDT54/74FCT533T/AT/CT, IDT54/74FCT573T/AT/CT/DT - 2573T/AT/CT
FAST CMOS OCTAL TRANSPARENT LATCHES
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
IDT54/74FCT373/2373T
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
1
2
3
4
5
6
7
8
9
10
20
19
P20-1
D20-1
SO20-2
SO20-7
SO20-8
&
E20-1
18
17
16
15
14
13
12
11
V
CC
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
LE
2564 cnv* 03
3 2
D
1
O
1
O
2
D
2
D
3
4
5
6
7
8
1
20 19
18
17
16
15
14
V
CC
O
7
OE
O
0
INDEX
D
0
D
7
D
6
O
6
O
5
D
5
L20-2
9 10 11 12 13
O
3
GND
LE
O
4
D
4
2564 cnv* 04
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
IDT54/74FCT573/2573T
OE
V
CC
1
OE
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
GND
1
2
3
4
5
6
7
8
9
10
20
19
P20-1
D20-1
SO20-2
SO20-7
SO20-8
&
E20-1
18
17
16
15
14
13
12
11
V
CC
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
LE
2564 cnv* 05
D
1
3 2
D
2
D
3
D
4
D
5
D
6
4
5
6
7
8
20 19
18
17
16
15
14
O
0
D
0
INDEX
O
1
O
2
O
3
O
4
O
5
L20-2
9 10 11 12 13
D
7
GND
LE
O
7
O
6
2564 cnv* 06
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
IDT54/74FCT533
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
1
2
3
4
5
6
7
8
9
10
P20-1
D20-1
SO20-2
&
E20-1
20
19
18
17
16
15
14
13
12
11
V
CC
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
LE
2564 cnv* 07
3 2
D
1
O
1
O
2
D
2
D
3
4
5
6
7
8
1
20 19
18
17
16
15
14
V
CC
O
7
OE
D
0
O
0
INDEX
D
7
D
6
O
6
O
5
D
5
L20-2
9 10 11 12 13
LE
O
3
GND
O
4
D
4
2564 cnv* 08
DIP/SOIC/CERPACK
TOP VIEW
LCC
TOP VIEW
6.12
2
IDT54/74FCT373T/AT/CT/DT - 2373T/AT/CT, IDT54/74FCT533T/AT/CT, IDT54/74FCT573T/AT/CT/DT - 2573T/AT/CT
FAST CMOS OCTAL TRANSPARENT LATCHES
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FUNCTION TABLE (533)
(1)
D
N
H
L
X
Inputs
LE
H
H
X
Outputs
FUNCTION TABLE (373 and 573)
(1)
OE
L
L
H
O
N
L
H
Z
2564 tbl 01
D
N
H
L
X
Inputs
LE
H
H
X
OE
L
L
H
Outputs
O
N
H
L
Z
2564 tbl 02
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
DEFINITION OF FUNCTIONAL TERMS
Pin Names
D
N
LE
Description
Data Inputs
Latch Enable Input (Active HIGH)
Output Enable Input (Active LOW)
3-State Outputs
Complementary 3-State Outputs
2564 tbll 03
OE
O
N
O
N
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Rating
Commercial
V
TERM(2)
Terminal Voltage
–0.5 to +7.0
with Respect to
GND
V
TERM(3)
Terminal Voltage
–0.5 to
with Respect to
V
CC
+0.5
GND
T
A
Operating
0 to +70
Temperature
T
BIAS
Temperature
–55 to +125
Under Bias
T
STG
Storage
–55 to +125
Temperature
P
T
Power Dissipation
0.5
I
OUT
DC Output
Current
–60 to +120
Military
–0.5 to +7.0
Unit
V
CAPACITANCE
(T
A
= +25°C, f = 1.0MHz)
Symbol
Parameter
(1)
C
IN
Input
Capacitance
C
OUT
Output
Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
6
8
Max. Unit
10
pF
12
pF
2564 lnk 05
–0.5 to
V
CC
+0.5
–55 to +125
–65 to +135
–65 to +150
0.5
–60 to +120
V
°
C
°
C
°
C
W
mA
NOTE:
1. This parameter is measured at characterization but not tested.
2564 lnk 04
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability. No terminal voltage may exceed
V
CC
by +0.5V unless otherwise noted.
2. Input and V
CC
terminals only.
3. Outputs and I/O terminals only.
6.12
3
IDT54/74FCT373T/AT/CT/DT - 2373T/AT/CT, IDT54/74FCT533T/AT/CT, IDT54/74FCT573T/AT/CT/DT - 2573T/AT/CT
FAST CMOS OCTAL TRANSPARENT LATCHES
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
= 0°C to +70°C, V
CC
= 5.0V
±
5%; Military: T
A
= –55°C to +125°C, V
CC
= 5.0V
±
10%
Symbol
V
IH
V
IL
I
I H
I
I L
I
OZH
I
OZL
I
I
V
IK
V
H
I
CC
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current
(4)
Input LOW Current
(4)
High Impedance Output Current
(3-State Output pins)
(4)
Input HIGH Current
(4)
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= Min., I
IN
= –18mA
—
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
I
= 2.7V
V
I
= 0.5V
V
O
= 2.7V
V
O
= 0.5V
V
CC
= Max., V
I
= V
CC
(Max.)
Min.
2.0
—
—
—
—
—
—
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
–0.7
200
0.01
Max.
—
0.8
±1
±1
±1
±1
±1
–1.2
—
1
Unit
V
V
µA
µA
µA
V
mV
mA
2564 lnk 06
V
CC
= Max., V
IN
= GND or V
CC
OUTPUT DRIVE CHARACTERISTICS FOR FCT373T/533T/573T
Symbol
V
OH
Parameter
Output HIGH Voltage
Test Conditions
(1)
V
CC
= Min.
I
OH
= –6mA MIL.
V
IN
= V
IH
or V
IL
I
OH
= –8mA COM'L.
I
OH
= –12mA MIL.
I
OH
= –15mA COM'L.
V
CC
= Min.
I
OL
= 32mA MIL.
V
IN
= V
IH
or V
IL
I
OL
= 48mA COM'L.
V
CC
= Max., V
O
= GND
(3)
V
CC
= 0V, V
IN
or V
O
≤
4.5V
Min.
2.4
2.0
—
–60
—
Typ.
(2)
3.3
3.0
0.3
–120
—
Max.
—
—
0.5
–225
Unit
V
V
V
mA
V
OL
I
OS
I
OFF
Output LOW Voltage
Short Circuit Current
Input/Output Power Off Leakage
(5)
±
1
µ
A
2564 lnk 07
OUTPUT DRIVE CHARACTERISTICS FOR FCT2373T/2573T
Symbol
I
ODL
I
ODH
V
OH
V
OL
Parameter
Output LOW Current
Output HIGH Current
Output HIGH Voltage
Output LOW Voltage
Test Conditions
(1)
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
OUT
= 1.5V
(3)
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
OUT
= 1.5V
(3)
V
CC
= Min.
V
IN
= V
IH
or V
IL
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OH
= –12mA MIL.
I
OH
= –15mA COM'L.
I
OL
= 12mA
Min.
16
–16
2.4
—
Typ.
(2)
48
–48
3.3
0.3
Max.
—
—
—
0.50
Unit
mA
mA
V
V
2564 lnk 08
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is
±5µA
at T
A
= –55°C.
5. This parameter is guaranteed but not tested.
6.12
4
IDT54/74FCT373T/AT/CT/DT - 2373T/AT/CT, IDT54/74FCT533T/AT/CT, IDT54/74FCT573T/AT/CT/DT - 2573T/AT/CT
FAST CMOS OCTAL TRANSPARENT LATCHES
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
∆I
CC
I
CCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply
Current
(4)
Test Conditions
(1)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
OE
= GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
OE
= GND
LE
=
V
CC
One Bit Toggling
V
CC
= Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
OE
= GND
LE
=
V
CC
Eight Bits Toggling
Min.
—
—
—
Typ.
(2)
0.5
0.15
0.06
Max.
2.0
0.25
0.12
Unit
mA
mA/
MHz
V
IN
= V
CC
FCTxxxT
V
IN
= GND
FCT2xxxT
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
FCTxxxT
—
—
—
1.5
0.6
1.8
0.9
3.5
2.2
4.5
3.2
6.0
(5)
3.4
(5)
14.0
(5)
11.4
(
5)
mA
V
IN
= GND FCT2xxxT
FCTxxxT
V
IN
= 3.4
V
IN
= GND
FCT2xxxT
V
IN
= V
CC
FCTxxxT
—
—
—
—
3.0
1.2
5.0
3.2
V
IN
= GND FCT2xxxT
FCTxxxT
V
IN
= 3.4
V
IN
= GND
FCT2xxxT
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V). All other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
∆I
CC
D
H
N
T
+ I
CCD
(f
CP/
2 + f
i
N
i
)
I
CC
= Quiescent Current
∆I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
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
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
i
= Input Frequency
N
i
= Number of Inputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
2564 tbl 09
6.12
5
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