IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS OCTAL
BUFFER/LINE DRIVER
FEATURES:
•
•
•
•
•
•
•
•
IDT74FCT2244AT/CT
DESCRIPTION:
A and C grades
Low input and output leakage ≤1µA (max.)
CMOS power levels
True TTL input and output compatibility:
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
Meets or exceeds JEDEC standard 18 specifications
Resistor outputs (-15mA IOH, 12mA IOL)
Reduced system switching noise
Available in SOIC and QSOP packages
The IDT octal buffer/line driver is built using an advanced dual metal
CMOS technology. The FCT2244T is designed to be employed as a
memory and address driver, clock driver, and bus-oriented transmitter/
receiver which provides improved board density.
The FCT2244T 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
FCT2244T is a plug-in replacement for the FCT244T.
FUNCTIONAL BLOCK DIAGRAM
OEA
OEB
DA0
OA0
OB0
DB0
DA1
OA1
OB1
DB1
DA2
OA2
OB2
DB2
DA3
OA3
OB3
DB3
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 2016
1
© 2016 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-5587/11
IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
VTERM(2)
Max
Unit
Terminal Voltage with Respect to GND
–0.5 to +7
V
Terminal Voltage with Respect to GND
–0.5 to VCC+0.5
V
OEA
1
20
VCC
VTERM(3)
DA0
2
3
19
OEB
TSTG
Storage Temperature
–65 to +150
°C
18
IOUT
DC Output Current
–60 to +120
mA
OA0
4
17
DB0
OB1
5
16
OA1
DA2
6
15
OB2
7
14
DB1
OA2
DA3
8
13
DB2
OB3
GND
9
12
OA3
10
11
DB3
OB0
DA1
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. No terminal voltage may exceed
Vcc by +0.5V unless otherwise noted.
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Parameter(1)
Symbol
SOIC / QSOP
TOP VIEW
Conditions
Typ.
Max.
CIN
Input Capacitance
VIN = 0V
6
10
pF
COUT
Output Capacitance
VOUT = 0V
8
12
pF
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
OEA, OEB
Description
3-State Output Enable Inputs (Active LOW)
Dxx
Inputs
Oxx
Outputs
FUNCTION TABLE(1)
OEA
L
L
H
Inputs
OEB
L
L
H
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
Z = High Impedance
2
Unit
D
L
H
X
Outputs
L
H
Z
IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
VIH
Input HIGH Level
Guaranteed Logic HIGH Level
2
—
—
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
Current(4)
IIH
Input HIGH
VCC = Max.
VI = 2.7V
—
—
±1
µA
IIL
Input LOW Current(4)
VCC = Max.
VI = 0.5V
—
—
±1
µA
IOZH
High Impedance Output Current
VCC = Max.
VI = 2.7V
—
—
±1
µA
IOZL
(3-State Output Pins)(4)
VI = 0.5V
—
—
±1
II
Input HIGH Current(4)
VCC = Max., VI = VCC (Max.)
—
—
±1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
VH
Input Hysteresis
—
200
—
mV
ICC
Quiescent Power Supply Current
—
0.01
1
mA
Min.
16
-16
2.4
Typ.(2)
48
-48
3.3
Max.
—
—
—
Unit
mA
mA
V
—
0.3
0.5
V
—
VCC = Max.
VIN = GND or VCC
µA
OUTPUT DRIVE CHARACTERISTICS
Symbol
IODL
IODH
VOH
VOL
Parameter
Output LOW Current
Output HIGH Current
Output HIGH Voltage
Output LOW Voltage
Test Conditions(1)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
VCC = Min
IOH = –15mA
VIN = VIH or VIL
VCC = Min
IOL = 12mA
VIN = VIH or VIL
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 VCC = 5.0V, +25°C ambient.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. The test limit for this parameter is ±5μA at TA = -55°C.
3
IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
—
0.5
2
mA
VIN = VCC
VIN = GND
—
0.06
0.12
mA/
MHz
VCC = Max.
Outputs Open
fi = 10MHz
VIN = VCC
VIN = GND
—
0.6
2.2
mA
50% Duty Cycle
OEA or OEB = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
—
0.9
3.2
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = VCC
VIN = GND
—
1.2
3.4(5)
50% Duty Cycle
OEA or OEB = GND
Four Bits Toggling
VIN = 3.4V
VIN = GND
—
3.2
11.4(5)
Symbol
Parameter
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
OEA or OEB = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
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 VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC 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 ΔICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCP/2+ fiNi)
ICC = Quiescent Current
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Output Frequency
Ni = Number of Outputs at fi
All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
74FCT2244AT
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
74FCT2244CT
Parameter
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Unit
Propagation Delay
Dx to Ox
Output Enable Time
CL = 50pF
RL = 500Ω
1.5
4.8
1.5
4.1
ns
1.5
6.2
1.5
5.8
ns
1.5
5.6
1.5
5.2
ns
Output Disable Time
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC
SWITCH POSITION
7.0V
500W
V OUT
VIN
Pulse
Generator
D.U.T
.
50pF
RT
500W
Test
Switch
Open Drain
Disable Low
Enable Low
Closed
All Other Tests
Open
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
CL
Octal Link
Test Circuits for All Outputs
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
3V
1.5V
0V
tH
1.5V
1.5V
Pulse Width
Octal Link
Octal Link
Set-Up, Hold, and Release Times
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
1.5V
0V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
tPLZ
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
3.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
Octal Link
VOH
0V
Octal Link
Propagation Delay
Enable and Disable Times
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
5
IDT74FCT2244AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
FCT
XX
Temperature
Range
XXXX
XX
Device
Type
Package
X
X
Blank
8
Tube
Tape and Reel
G
Green
SO
Q
Small Outline IC (PSG20)
Quarter-size Small Outline Package (PCG20)
2244AT
2244CT
Fast CMOS Octal Buffer/Line Driver
74
−40°C to +85°C
Datasheet Document History
09/28/2009
09/26/2011
11/26/2016
Pg. 6
Pg. 2,6
Pg. 6
Updated the ordering information by removing the "IDT" notation and non RoHS part.
Correct Outputs in Function Table. Updated ordering information to include tube or tray and tape & reel.
Updated ordering information diagram temperature symbol, removed tray and created Green option in greater detail.
6
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