IDT54/74FCT162841AT/BT/CT
FAST CMOS 20-BIT TRANSPARENT LATCH
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
FAST CMOS 20-BIT
IDT54/74FCT162841AT/BT/CT
TRANSPARENT LATCH
FEATURES:
−
−
−
−
−
−
−
−
−
−
0.5 MICRON CMOS Technology
High-speed, low-power CMOS replacement for ABT functions
Typical t
SK
(o) (Output Skew) < 250ps
Low input and output leakage
≤1µ
A (max.)
ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
V
CC
= 5V ±10%
Balanced Output Drivers:
•
±24mA (industrial)
•
±16mA (military)
Reduced system switching noise
Typical VOLP (Output Ground Bounce) < 0.6V at V
CC
= 5V,T
A
=
25°C
Available in the following packages:
•
Industrial: SSOP, TSSOP, TVSOP
•
Military: CERPACK
DESCRIPTION:
The FCT162841T 20-bit transparent D-type latches are built using
advanced dual metal CMOS technology. These high-speed, low-power
latches are ideal for temporary data storage. They can be used for
implementing memory address latches, I/O ports, and bus drivers. The
Output Enable (OE) and Latch Enable (LE) controls are organized to
operate each device as two 10-bit latches or one 20-bit latch. Flow-through
organization of signal pins simplifies layout. All inputs are designed with
hysteresis for improved noise margin.
The FCT162841T has balanced output drive 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 FCT162841T is a plug-in replacement for the FCT16841T
and ABT16841 for on-board interface applications.
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
2
OE
28
1
LE
56
2
LE
29
1
D
1
55
D
2
2
D
1
42
D
15
C
1
Q
1
C
2
Q
1
TO NINE OTHER CHANNELS
TO NINE OTHER CHANNELS
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
1
c
1999
Integrated Device Technology, Inc.
OCTOBER 2000
DSC-5467
IDT54/74FCT162841AT/BT/CT
FAST CMOS 20-BIT TRANSPARENT LATCH
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
PIN CONFIGURATION
1
O E
1
Q
1
1
Q
2
ABSOLUTE MAXIMUM RATINGS
(1)
56
55
54
53
52
51
50
49
48
47
46
45
1
LE
1
D
1
1
D
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
V
TERM(2)
V
TERM(3)
T
STG
I
OUT
Description
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Max
–0.5 to +7
–0.5 to V
CC
+0.5
–65 to +150
–60 to +120
Unit
V
V
°C
mA
5v16-link
GND
1
Q
3
1
Q
4
GND
1
D
3
1
D
4
V
CC
1
Q
5
1
Q
6
1
Q
7
V
CC
1
D
5
1
D
6
1
D
7
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS 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.
2. All device terminals except FCT162XXX Output and I/O terminals.
3. Output and I/O terminals for FCT162XXX.
GND
1
Q
8
1
Q
9
1
Q
10
2
Q
1
2
Q
2
2
Q
3
GND
1
D
8
1
D
9
1
D
10
2
D
1
2
D
2
2
D
3
CAPACITANCE
(T
A
= +25
O
C, f = 1.0MHz)
Symbol
C
IN
C
OUT
Parameter
(1)
Input Capacitance
Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
3.5
3.5
Max.
6
8
Unit
pF
pF
5v16-link
SO 56-1
SO 56-2 43
SO 56-3
42
E56-1
41
40
39
38
37
36
35
34
33
32
31
30
29
44
NOTE:
1. This parameter is measured at characterization but not tested.
GND
2
Q
4
2
Q
5
2
Q
6
GND
2
D
4
2
D
5
2
D
6
PIN DESCRIPTION
Pin Names
xDx
xLE
x
OE
xQx
Description
Data Inputs
Latch Enable Input (Active HIGH)
Output Enable Input (Active LOW)
3-State Outputs
V
CC
2
Q
7
2
Q
8
V
CC
2
D
7
2
D
8
GND
2
Q
9
2
Q
10
2
O E
GND
2
D
9
2
D
10
2
LE
FUNCTION TABLE
(1)
xDx
H
L
X
X
Inputs
xLE
H
H
L
X
xOE
L
L
L
H
Outputs
xQx
H
L
Q
(2)
Z
SSOP/ TSSOP/ TVSOP/ CERPACK
TOP VIEW
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
2. Output Level before xLE HIGH-to-LOW transition.
2
IDT54/74FCT162841AT/BT/CT
FAST CMOS 20-BIT TRANSPARENT LATCH
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= -40°C to +85°C, V
CC
= 5.0V ±10%; Military: T
A
= -55°C to +125°C, V
CC
= 5.0V ±10%
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OS
V
H
I
CCL
I
CCH
I
CCZ
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current (Input pins)
(5)
Input HIGH Current (I/O pins)
(5)
Input LOW Current (Input pins)
(5)
Input LOW Current (I/O pins)
(5)
High Impedance Output Current
(3-State Output pins)
(5)
Clamp Diode Voltage
Short Circuit Current
Input Hysteresis
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
V
CC
= Min., I
IN
= –18mA
V
CC
= Max., V
O
= GND
(3)
—
V
CC
= Max.
V
O
= 2.7V
V
O
= 0.5V
V
I
= GND
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
I
= V
CC
Min.
2
—
—
—
—
—
—
—
—
–80
—
—
Typ.
(2)
—
—
—
—
—
—
—
—
–0.7
–140
100
5
Max.
—
0.8
±1
±1
±1
±1
±1
±1
–1.2
–250
—
500
V
mA
mV
µA
µA
Unit
V
V
µA
5v16-link
OUTPUT DRIVE CHARACTERISTICS
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
O
= 1.5V
(3)
V
CC
= 5V, V
IN
= V
IH
or V
IL
, V
O
= 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
= –16mA MIL
I
OH
= –24mA IND.
I
OL
= 16mA MIL
I
OL
= 24mA IND.
5v16-link
Min.
60
–60
2.4
—
Typ.
(2)
115
–115
3.3
0.3
Max.
200
–200
—
0.55
Unit
mA
mA
V
V
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. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Duration of the condition can not exceed one second.
5. The test limit for this parameter is ±5µA at T
A
= -55°C.
3
IDT54/74FCT162841AT/BT/CT
FAST CMOS 20-BIT TRANSPARENT LATCH
MILITARY AND INDUSTRIAL 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
x
OE
= GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
x
OE
= GND
xLE = Vcc
One Bit Toggling
V
CC
= Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
x
OE
= GND
xLE = Vcc
Twenty Bits Toggling
Min.
—
—
Typ.
(2)
0.5
60
Max.
1.5
100
Unit
mA
µ A/
MHz
V
IN
= V
CC
V
IN
= GND
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
—
0.6
1.5
mA
—
0.9
2.3
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
—
3
5.5
(5)
—
8
20.5
(5)
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
N
CP
/2 + f
i
N
i
)
I
CC
= Quiescent Current (I
CCL
,
I
CCH
and I
CCZ
)
∆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)
N
CP
= Number of Clock Inputs at f
CP
f
i
= Input Frequency
N
i
= Number of Inputs at f
i
4
IDT54/74FCT162841AT/BT/CT
FAST CMOS 20-BIT TRANSPARENT LATCH
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT162841AT
Ind.
Symbol
Parameter
t
PLH
Propagation Delay
t
PHL
xDx to xQx
(LE = HIGH)
t
PLH
t
PHL
Propagation Delay
xLE to xQx
Condition
(1)
C
L
= 50pF
R
L
= 500Ω
C
L
= 300pF
(5)
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
C
L
= 300pF
(5)
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
C
L
= 300pF
(5)
R
L
= 500Ω
C
L
= 5pF
(5)
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
C
L
= 50pF
R
L
= 500Ω
Min
.
(2)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
4
(4)
—
Mil.
Max
.
Min
.
(2)
9
13
12
16
11.5
23
7
8
—
—
—
0.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
3
5
—
FCT162841BT
Ind.
Mil.
FCT162841CT
Ind.
Mil.
Max
.
Min
.
(2)
Max
.
Min
.
(2)
Max
.
Min
.
(2)
Max
.
Min
.
(2)
Max
.
Unit
10
15
13
20
13
25
9
10
—
—
—
0.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
4
(4)
—
6.5
13
8
15.5
8
14
6
7
—
—
—
0.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
4
(4)
—
7.5
15
10.5
18
8.5
15
6.5
7.5
—
—
—
0.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1
1
3
(4)
—
3.8
7.5
3.8
7.5
4.6
9
3.6
3.6
—
—
—
0.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
4
(4)
—
6.3
15
6.8
16
7.3
13
6
6.3
—
—
—
0.5
ns
ns
ns
ns
ns
ns
ns
ns
t
PZH
t
PZL
Output Enable Time
x
OE
to xQx
t
PHZ
t
PLZ
Output Disable Time
x
OE
to xQx
t
SU
t
H
t
W
t
SK
(o)
Set-Up Time HIGH or LOW,
xDx to xLE
Hold Time HIGH or LOW,
xDx to xLE
xLE Pulse Width HIGH
Output Skew
(3)
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
4. This limit is guaranteed but not tested.
5. This condition is guaranteed but not tested.
5
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