IDT54/74FCT16240AT/CT/ET
FAST CMOS 16-BIT BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS 16-BIT
BUFFER/LINE DRIVER
IDT54/74FCT16240AT/CT/ET
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)
25 mil pitch SSOP, 19.6 mil pitch TSSOP, 15.7 mil pitch TVSOP
and 25 mil pitch CERPACK packages
Extended commercial range of -40°C to +85°C
V
CC
= 5V ±10%
High drive outputs (-32mA I
OH
, 64mA I
OL
)
Power off disable outputs permit “live insertion”
Typical V
OLP
(Output Ground Bounce) < 1.0V at V
CC
= 5V, T
A
=
25°C
DESCRIPTION:
The FCT16240T/AT/CT/ET 16-bit buffer/line driver is built using
advanced dual metal CMOS technology. These high-speed, low-power
devices offer bus/backplane interface capability with improved packing
density. The flow-through organization of signal pins simplifies layout. The
three-state controls are designed to operate these devices in a Quad-
Nibble, Dual-Byte or single 16-bit word mode. All inputs are designed with
hysteresis for improved noise margin.
The FCT16240T/AT/CT/ET is ideally suited for driving high capacitance
loads and low-impedance backplanes. The output buffers are designed with
power off disable capability to allow "live insertion" of boards when used as
backplane drivers.
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
Y
1
3
OE
1
A
1
1
A
2
3
A
1
3
A
2
3
Y
1
3
Y
2
1
Y
2
1
A
3
1
A
4
1
Y
3
3
A
3
3
Y
3
3
Y
4
1
Y
4
3
A
4
2
OE
2
Y
1
4
OE
2
A
1
2
A
2
2
A
3
4
A
1
4
A
2
4
A
3
4
Y
1
4
Y
2
4
Y
3
2
Y
2
2
Y
3
2
Y
4
2
A
4
4
A
4
4
Y
4
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1
c
1999 Integrated Device Technology, Inc.
AUGUST 1999
DSC-5465/-
IDT54/74FCT16240AT/CT/ET
FAST CMOS 16-BIT BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATION
1
O E
1
Y
1
1
Y
2
ABSOLUTE MAXIMUM RATINGS
(1)
48
47
46
45
44
43
42
41
40
39
38
2
O E
1
A
1
1
A
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
SO48-1
SO48-2
SO48-3
E48-1
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
G ND
1
Y
3
1
Y
4
G ND
1
A
3
1
A
4
V
CC
2
Y
1
2
Y
2
V
CC
2
A
1
2
A
2
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 FCT162XXXT Output and I/O terminals.
3. Output and I/O terminals for FCT162XXXT.
G ND
2
Y
3
2
Y
4
3
Y
1
3
Y
2
G ND
2
A
3
2
A
4
3
A
1
3
A
2
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
37
36
35
34
33
32
31
30
29
28
27
26
25
NOTE:
1. This parameter is measured at characterization but not tested.
G ND
3
Y
3
3
Y
4
G ND
3
A
3
3
A
4
PIN DESCRIPTION
Pin Names
xOE
xAx
xYx
Description
3–State Output Enable Inputs (Active LOW)
Data Inputs
3-State Outputs
V
CC
4
Y
1
4
Y
2
V
CC
4
A
1
4
A
2
G ND
4
Y
3
4
Y
4
4
O E
G ND
4
A
3
4
A
4
3
O E
FUNCTION TABLE
(1)
Inputs
xOE
L
L
H
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
Z = High-Impedance
xAx
L
H
X
Outputs
xYx
H
L
Z
SSOP/ TSSOP/ TVSOP/ CERPACK
TOP VIEW
2
IDT54/74FCT16240AT/CT/ET
FAST CMOS 16-BIT BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: 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
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
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
I
CCL
Quiescent Power Supply Current
IDT54/74FCT16240AT/CT/ET
I
CCH
I
CCZ
5v16-link
OUTPUT DRIVE CHARACTERISTICS
Symbol
I
O
V
OH
Parameter
Output Drive Current
Output HIGH Voltage
Test Conditions
(1)
V
CC
= Max., V
O
= 2.5V
(3)
V
CC
= Min.
V
IN
=
V
IH
or V
IL
I
OH
= –3mA
I
OH
= –12mA MIL
I
OH
= –15mA COM’L
I
OH
= –24mA MIL
I
OH
= –32mA COM’L
(4)
V
OL
I
OFF
Output LOW Voltage
Input/Output Power Off Leakage
(5)
V
CC
= Min.
V
IN
=
V
IH
or V
IL
V
CC
= 0V, V
IN
or V
O
≤
4.5V
I
OL
= 48mA MIL
I
OL
= 64mA COM’L
—
—
±1
µA
—
0.2
0.55
V
2
3
—
V
Min.
–50
2.5
2.4
Typ.
(2)
—
3.5
3.5
Max.
–180
—
—
Unit
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
IDT54/74FCT16240AT/CT/ET
FAST CMOS 16-BIT BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY
Symbol
∆I
CC
I
CCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply
Current
(4)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
xOE = GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
xOE = GND
One Bit Toggling
V
CC
= Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
xOE = GND
Sixteen Bits Toggling
V
IN
= V
CC
V
IN
= GND
Test Conditions
(1)
Min.
—
—
Typ.
(2)
0.5
60
Max.
1.5
100
Unit
mA
µ A/
MHz
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
—
0.6
1.5
mA
—
0.9
2.3
—
2.4
4.5
(5)
—
6.4
16.5
(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
IDT54/74FCT16240AT/CT/ET
FAST CMOS 16-BIT BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT16240T
Com'l.
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(o)
Parameter
Propagation Delay
xAx to xYx
Output Enable Time
Output Disable Time
Output Skew
(3)
Condition
(1)
C
L
= 50pF
R
L
= 500Ω
Min
.
(2)
1.5
1.5
1.5
—
Max
.
8
10
9.5
0.5
Min
.
(2)
1.5
1.5
1.5
—
Mil.
Max
.
9
10.5
10
0.5
Com'l.
Min
.
(2)
1.5
1.5
1.5
—
Max
.
4.8
6.2
5.6
0.5
Min
.
(2)
1.5
1.5
1.5
—
FCT16240AT
Mil.
Max
.
5.1
6.5
5.9
0.5
Unit
ns
ns
ns
ns
FCT16240CT
Com'l.
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(o)
Parameter
Propagation Delay
xAx to xYx
Output Enable Time
Output Disable Time
Output Skew
(3)
Condition
(1)
C
L
= 50pF
R
L
= 500Ω
Min
.
(2)
1.5
1.5
1.5
—
Max
.
4.3
5.8
5.2
0.5
Min
.
(2)
1.5
1.5
1.5
—
Mil.
Max
.
4.7
6.5
5.7
0.5
Com'l.
Min
.
(2)
1.5
1.5
1.5
—
FCT16240ET
Mil.
Min
.
(2)
—
—
—
—
Max
.
—
—
—
—
Unit
ns
ns
ns
ns
Max
.
3.2
4.4
3.6
0.5
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.
5
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