1
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
JUNE 2002
INDUSTRIAL TEMPERATURE RANGE
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
1µA (max.)
· Light drive balanced output of ±8mA
· Minimal system switching noise
· Typical V
OLP
(Output Ground Bounce) < 0.25V at V
CC
= 5V,
T
A
= 25°C
· Power off disable outputs permit "live insertion"
· Available in SSOP and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-5462/2
IDT74FCT166244AT/CT
FAST CMOS 16-BIT
BUFFER/LINE DRIVER
DESCRIPTION:
The FCT166244T 16-Bit Buffer/Line Driver is for bus interface or signal
buffering applications requiring high speed and low power dissipation. These
devices have a flow through pin organization, and shrink packaging to simplify
board layout. All inputs are designed with hysteresis for improved noise
margin. The three-state controls allow independent 4-bit, 8-bit or combined 16-
bit operation. These parts are plug in replacements for ABT16244 where
higher speed, lower noise or lower power dissipation levels are desired.
The FCT166244T is suited for very low noise, point-to-point driving
where there is a single receiver, or a very light lumped load (<100pF). The
buffers are designed to limit the output current to levels which will avoid noise
and ringing on the signal lines without using external series terminating
resistors.
3
O E
3
A
1
3
A
2
3
A
3
3
A
4
3
Y
1
3
Y
2
3
Y
3
3
Y
4
1
Y
1
1
Y
2
1
Y
3
1
Y
4
1
A
1
1
A
2
1
A
3
1
A
4
1
OE
4
O E
4
A
1
4
A
2
4
A
3
4
A
4
4
Y
1
4
Y
2
4
Y
3
4
Y
4
2
OE
2
A
1
2
A
2
2
A
3
2
A
4
2
Y
1
2
Y
2
2
Y
3
2
Y
4
2
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
SSOP/ TSSOP
TOP VIEW
PIN CONFIGURATION
Symbol
Description
Max
Unit
V
TERM(2)
Terminal Voltage with Respect to GND
0.5 to +7
V
V
TERM(3)
Terminal Voltage with Respect to GND
0.5 to V
CC
+0.5
V
T
STG
Storage Temperature
65 to +150
°C
I
OUT
DC Output Current
60 to +120
mA
ABSOLUTE MAXIMUM RATINGS
(1)
(1)
(1)
(1)
(1)
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.
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
3.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
3.5
8
pF
CAPACITANCE
(T
A
= +25°C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
FUNCTION TABLE
(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
1
Y
1
GND
1
Y
3
V
CC
GND
3
Y
2
GND
V
CC
GND
1
Y
2
1
Y
4
2
Y
1
2
Y
2
2
Y
3
2
Y
4
3
Y
1
3
Y
3
3
Y
4
4
Y
1
4
Y
3
4
Y
4
4
Y
2
4
OE
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
CC
2
A
1
2
A
2
2
A
3
2
A
4
3
A
1
3
A
2
3
A
3
3
A
4
V
CC
4
A
1
4
A
3
4
A
4
4
A
2
GND
GND
GND
2
OE
3
OE
39
29
30
31
32
33
34
35
36
37
38
25
26
27
28
48
47
41
42
43
44
45
46
40
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
1
OE
Inputs
Outputs
xOE
xAx
xYx
L
L
L
L
H
H
H
X
Z
Pin Names
Description
xOE
3-State Output Enable Inputs (Active LOW)
xAx
Data Inputs
xYx
3-State Outputs
PIN DESCRIPTION
3
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
ODL
Output LOW Current
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
O
= 1.5V
(3)
16
48
96
mA
I
ODL
Output HIGH Current
V
CC
= 5V, V
IN
= V
IH
or V
IL,
V
O
= 1.5V
(3)
16
48
96
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 8mA
2.4
3.3
--
V
V
IN
= V
IH
or V
IL
V
OH
Output LOW Voltage
V
CC
= Min.
I
OL
= 8mA
--
0.3
0.55
V
V
IN
= V
IH
or V
IL
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
IH
Input HIGH Current (Input pins)
(5)
V
CC
= Max.
V
I
= V
CC
--
--
±1
µA
Input HIGH Current (I/O pins)
(5)
--
--
±1
I
IL
Input LOW Current (Input pins)
(5)
V
I
= GND
--
--
±1
Input LOW Current (I/O pins)
(5)
--
--
±1
I
OZH
High Impedance Output Current
V
CC
= Max.
V
O
= 2.7V
--
--
±1
µA
I
OZL
(3-State Output pins)
(5)
V
O
= 0.5V
--
--
±1
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max., V
O
= GND
(3)
80
140
250
mA
V
H
Input Hysteresis
--
--
100
--
mV
I
CCL
Quiescent Power Supply Current
V
CC
= Max.
--
5
500
µA
I
CCH
V
IN
= GND or V
CC
I
CCZ
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%
NOTES:
1. For conditions shown as Min. or Max., 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 ±5
µA at T
A
= -55°C.
OUTPUT DRIVE CHARACTERISTICS
4
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply
V
CC
= Max.
--
0.5
1.5
mA
Current TTL Inputs HIGH
V
IN
= 3.4V
(3)
I
CCD
Dynamic Power Supply Current
(4)
V
CC
= Max.,
V
IN
= V
CC
--
60
100
µA/
Outputs Open
V
IN
= GND
MHz
xOE = GND
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply Current
(6)
V
CC
= Max.,
V
IN
= V
CC
--
0.6
1.5
mA
Outputs Open
V
IN
= GND
f
CP
= 10MHz (CLKBA)
50% Duty Cycle
V
IN
= 3.4V
--
0.9
2.3
xOE = GND
V
IN
= GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
--
2.4
4.5
(5)
Outputs Open
V
IN
= GND
fi = 2.5MHz
50% Duty Cycle
V
IN
= 3.4V
--
6.4
16.5
(5)
xOE = GND
V
IN
= GND
Sixteen Bits Toggling
POWER SUPPLY CHARACTERISTICS
NOTES:
1. For conditions shown as Min. or Max., 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 + fiNi)
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
74FCT166244AT
74FCT166422CT
Symbol
Parameter
Condition
(1)
Min.
(2)
Max.
Min.
(2)
Max.
Unit
t
PLH
Propagation Delay
C
L
= 50pF
1.5
4.8
1.5
4.1
ns
t
PHL
xAx to xYx
R
L
= 500
t
PZH
Output Enable Time
1.5
6.2
1.5
5.8
ns
t
PZL
t
PHZ
Output Disable Time
1.5
5.6
1.5
5.2
ns
t
PLZ
t
SK(o)
Output Skew
(3)
--
0.5
--
0.5
ns
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
1. See test circuits 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
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
Pulse
Generator
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
D ATA
INPUT
TIM IN G
INPUT
ASYNC HR ONOUS C ONTROL
PRES ET
CLEA R
ETC .
SYNCHR ON OUS CONTROL
t
SU
t
H
t
R EM
t
SU
t
H
PRES ET
CLEA R
CLOCK ENABLE
ETC .
HIGH-LOW -H IGH
PU LSE
LOW -HIGH-LOW
PU LSE
t
W
1.5V
1.5V
SAM E PHASE
INPUT TRAN SITION
3V
1.5V
0V
1.5V
V
O H
t
PLH
OU TPU T
OPPOSITE P HASE
INPUT TRAN SITION
3V
1.5V
0V
t
PL H
t
PH L
t
PH L
V
O L
CONTROL
IN PU T
3V
1.5V
0V
3.5V
0V
OUTPU T
NORM ALLY
LOW
OUTPU T
NORM ALLY
H IGH
SW ITCH
C LOSE D
SW ITC H
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE
D ISABLE
V
OH
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
Set-up, Hold, and Release Times
Pulse Width
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2.5ns; t
R
2.5ns.
Test
Switch
Open Drain
Disable Low
Closed
Enable Low
All Other Tests
Open
SWITCH POSITION
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
6
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT166244AT/CT
FAST CMOS 16-BIT BUFFER/LINE DRIVER
ORDERING INFORMATION
IDT XX
Temp. Range
XXXX
Device Type
XX
Package
PV
PA
244AT
244CT
Shrink Small Outline Package
Thin Shrink Small Outline Package
16-Bit Buffer/Line Driver
74
40°C to +85°C
166
16-Bit, 5 Volt, Light Drive
FCT
XXX
Family
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
6/21/2002 Updated according to PDNs Logic-00-07 and Logic-01-04
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