IDT74FCT244ALB Datasheet PDF - Integrated Device Tech
| Part Number | IDT74FCT244ALB | |
| Description | FAST CMOS OCTAL BUFFER/LINE DRIVER | |
| Manufacturers | Integrated Device Tech | |
| Logo |  |
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®
Integrated Device Technology, Inc.
FAST CMOS OCTAL
BUFFER/LINE DRIVER
IDT54/74FCT240/A/C
IDT54/74FCT241/A/C
IDT54/74FCT244/A/C
IDT54/74FCT540/A/C
IDT54/74FCT541/A/C
FEATURES:
• IDT54/74FCT240/241/244/540/541 equivalent to FASTTM
speed and drive
• IDT54/74FCT240A/241A/244A/540A/541A 25% faster
than FAST
• IDT54/74FCT240C/241C/244C/540C/541C up to 55%
faster than FAST
• IOL = 64mA (commercial) and 48mA (military)
• CMOS power levels (1mW typ. static)
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
• Meets or exceeds JEDEC Standard 18 specifications
DESCRIPTION:
The IDT octal buffer/line drivers are built using an advanced
dual metal CMOS technology. The IDT54/74FCT240/A/C,
IDT54/74FCT241/A/C and IDT54/74FCT244/A/C are designed
to be employed as memory and address drivers, clock drivers
and bus-oriented transmitter/receivers which provide improved
board density.
The IDT54/74FCT540/A/C and IDT54/74FCT541/A/C are
similar in function to the IDT54/74FCT240/A/C and IDT54/
74FCT244/A/C, respectively, except that the inputs and out-
puts are on opposite sides of the package. This pinout
arrangement makes these devices especially useful as output
ports for microprocessors and as backplane drivers, allowing
ease of layout and greater board density.
FUNCTIONAL BLOCK DIAGRAMS
2529 cnv* 01–03
OEA
OEB
DA0
OA0
OB0
DB0
DA1
OB1
OA1
DB1
DA2
OB2
OA2
DB2
DA3
OA3
OB3
DB3
OEA
DA0
OB0
DA1
OB1
DA2
OB2
DA3
OB3
241 Only
OEB*
OA0
DB0
OA1
DB1
OA2
DB2
OA3
DB3
OEA
D0
D1
D2
D3
D4
D5
D6
D7
OEB
O0*
O1*
O2*
O3*
O4*
O5*
O6*
O7*
IDT54/74FCT240
IDT54/74FCT241/244
*OEB for 241, OEB for 244
IDT54/74FCT540/541
*Logic diagram shown for 'FCT540.
'FCT541 is the non-inverting option.
2606 dwg 01–03
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.8
MAY 1992
DSC-4610/3
1
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IDT54/74FCT240/241/244/540/541/A/C
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max. Unit
ICC Quiescent Power Supply Current VCC = Max.
VIN ≥ VHC; V IN ≤ VLC
— 0.2 1.5 mA
∆ICC
Quiescent Power Supply Current VCC = Max.
TTL Inputs HIGH
VIN = 3.4V(3)
— 0.5 2.0 mA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
OEA = OEB = GND or
OEA = GND,
VIN ≥ VHC
VIN ≤ VLC
— 0.15 0.25 mA/
MHz
OEB = VCC
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current (6)
VCC = Max.
VIN ≥ VHC
— 1.7 4.0 mA
Outputs Open
VIN ≤ VLC
fi = 10MHz
(FCT)
50% Duty Cycle
OEA = OEB = GND or VIN = 3.4V
OEA = GND,
VIN = GND
— 2.0 5.0
OEB = VCC
One Bit Toggling
VCC = Max.
VIN ≥ VHC
— 3.2 6.5(5)
Outputs Open
VIN ≤ VLC
fi = 5MHz
(FCT)
50% Duty Cycle
OEA = OEB = GND or VIN = 3.4V
OEA = GND,
VIN = GND
— 5.2 14.5(5)
OEB = VCC
Eight Bits Toggling
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. 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 the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = 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 = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
2606 tbl 06
7.8 5
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Featured Datasheets
| Part Number | Description | MFRS |
| IDT74FCT244AL | The function is FAST CMOS OCTAL BUFFER/LINE DRIVER. Integrated Device Tech | |
| IDT74FCT244ALB | The function is FAST CMOS OCTAL BUFFER/LINE DRIVER. Integrated Device Tech | |
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