IDT742244ATQB [IDT]
FAST CMOS OCTAL BUFFER/LINE DRIVERS; 快速CMOS八路缓冲器/线路驱动器
| 型号： | IDT742244ATQB |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS OCTAL BUFFER/LINE DRIVERS |
| 文件： | 总9页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT54/74FCT240T/AT/CT/DT - 2240T/AT/CT
FAST CMOS OCTAL
BUFFER/LINE
IDT54/74FCT244T/AT/CT/DT - 2244T/AT/CT
IDT54/74FCT540T/AT/CT
IDT54/74FCT541/2541T/AT/CT
DRIVERS
Integrated Device Technology, Inc.
FEATURES:
• Common features:
– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
DESCRIPTION:
TheIDToctalbuffer/linedriversarebuiltusinganadvanced
dual metal CMOS technology. The FCT240T/FCT2240T and
FCT244T/FCT2244Taredesignedtobeemployedasmemory
and address drivers, clock drivers and bus-oriented transmit-
ter/receivers which provide improved board density.
The FCT540T and FCT541T/FCT2541T are similar in
functiontotheFCT240T/FCT2240TandFCT244T/FCT2244T,
respectively, except that the inputs and outputs are on oppo-
site sides of the package. This pinout arrangement makes
these devices especially useful as output ports for micropro-
cessorsandasbackplanedrivers, allowingeaseoflayoutand
greater board density.
TheFCT2240T, FCT2244TandFCT2541Thavebalanced
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 resis-
tors. FCT2xxxT parts are plug-in replacements for FCTxxxT
parts.
– VOL = 0.3V (typ.)
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT240T/FCT244T/FCT540T/FCT541T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)
• Features for FCT2240T/FCT2244T/FCT2541T:
– Std., A and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
FUNCTIONAL BLOCK DIAGRAMS
OEB
OEA
OEA
OEA
OEB
OEB
OA0
DB0
DA0
OB0
DA1
OB1
OA0
DB0
OA1
DB1
D0
D1
O0
O1
DA0
OB0
DA1
OB1
D2
D3
D4
D5
D6
D7
O2
OA1
DB1
O3
O4
O5
O6
O7
DA2
OA2
DB2
OA3
DB3
DA2
OB2
OA2
DB2
OB2
DA3
DA3
OB3
OA3
DB3
OB3
FCT240/2240T
FCT540/541/2541T
FCT244/2244T
*Logic diagram shown for 'FCT540.
'FCT541/2541T is the non-inverting option.
2565 drw 01
2565 drw 03
2565 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DECEMBER 1995
1996 Integrated Device Technology, Inc.
6.8
DSC-2565/6
1
1
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
FCT240/2240T
INDEX
OEA
1
20
19
18
17
16
15
14
13
12
11
VCC
DA0
OB0
DA1
OB1
2
3
4
OEB
OA0
DB0
OA1
DB1
OA2
DB2
OA3
3
2
20 19
1
4
5
6
7
8
18
OA0
DB0
OA1
DB1
OA2
P20-1
D20-1
SO20-2
SO20-7
SO20-8
&
DA1
OB1
5
17
16
15
14
DA2
OB2
6
DA2
OB2
L20-2
7
DA3
OB3
8
DA3
E20-1
9 10 11 12 13
9
GND
10
DB3
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
2565 drw 07
2565 drw 04
FCT244/2244T
INDEX
20
19
18
17
OE
DA
OB
DA
OB
DA
OB
DA
OB
GND
A
1
V
CC
0
2
3
4
OE
B
0
OA
DB
OA
DB
0
0
1
1
3
2
20 19
P20-1
D20-1
1
1
18
DA
OB
DA
1
1
2
4
5
6
7
8
OA
DB
OA
DB
OA
0
SO20-2 16
17
16
15
14
1
5
0
SO20-7
SO20-8
15
2
6
L20-2
1
14
2
7
OB
DA
2
3
1
OA
DB
OA
DB
2
2
3
3
&
13
3
8
E20-1
2
9 10 11 12 13
12
11
9
3
10
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
2565 drw 08
2565 drw 05
FCT540/541/2541T
INDEX
20
19
18
17
16
15
14
13
12
11
OEA
1
VCC
D0
D1
D2
2
3
4
OEB
O0*
O1*
O2*
O3*
3
2
20 19
1
4
D2
D3
D4
D5
D6
18
O0*
O1*
O2*
O3*
O4*
P20-1
D20-1
SO20-2
SO20-8
&
5
6
7
8
5
17
16
15
14
D3
D4
6
L20-2
7
D5
D6
O4*
O5*
O6*
O7*
8
E20-1
9 10 11 12 13
9
D7
10
GND
DIP/SOIC/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
*Ox for 540, Ox for 541/2541T
2565 drw 06
2565 drw 09
6.8
2
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
FUNCTION TABLE
Pin Names
Description
Inputs(1)
Outputs(1)
OEA, OEB
Dxx
3–State Output Enable Inputs (Active LOW)
A
B
OE
D
L
240
H
244
L
540
H
541
OE
Inputs
L
L
L
L
L
H
H
X
L
H
L
H
Z
Oxx
Outputs
2565 tbl 01
H
Z
Z
Z
NOTES:
2565 tbl 02
1. H = High Voltage Level
X = Don’t Care
L = Low Voltage Level
Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Rating
Commercial
Military
Unit
Symbol
Parameter(1)
Input
Capacitance
Output
Conditions Typ. Max. Unit
(2)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0
V
CIN
VIN = 0V
6
10
pF
COUT
VOUT = 0V
8
12
pF
(3)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to
VCC +0.5
–0.5 to
VCC +0.5
V
Capacitance
2565 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
TA
Operating
0 to +70
–55 to +125 °C
Temperature
Temperature
Under Bias
Storage
TBIAS
TSTG
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
Temperature
Power Dissipation
PT
0.5
0.5
W
IOUT
DC Output
Current
–60 to +120 –60 to +120 mA
2565 lnk 03
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
onlyandfunctionaloperationofthedeviceattheseoranyotherconditions
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. Input and VCC terminals only.
3. Outputs and I/O terminals only.
6.8
3
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Parameter
Input HIGH Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
—
—
—
—
—
—
—
—
0.8
±1
±1
±1
±1
±1
–1.2
—
V
VIL
II H
II L
Input LOW Level
Guaranteed Logic LOW Level
V
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current
(3-State Output pins)(4)
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max.
VCC = Max.
VI = 2.7V
VI = 0.5V
VO = 2.7V
VO = 0.5V
—
µA
—
IOZH
IOZL
II
—
µA
—
VCC = Max., VI = VCC (Max.)
VCC = Min., IIN = –18mA
—
—
µA
V
VIK
VH
ICC
–0.7
200
0.01
mV
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
1
mA
2565 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT240/244/540/541T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VOH
Output HIGH Voltage
VCC = Min.
VIN = VIH or VIL
IOH = –6mA MIL.
2.4
2.0
—
3.3
3.0
0.3
—
V
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 48mA MIL.
—
V
V
VOL
IOS
Output LOW Voltage
Short Circuit Current
VCC = Min.
VIN = VIH or VIL
VCC = Max., VO = GND(3)
0.55
IOL = 64mA COM'L.
–60
–120 –225
mA
2565 lnk 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2240/2244/2541T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
IODL
Output LOW Current
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
16
–16
2.4
48
–48
3.3
—
—
—
mA
IODH
VOH
Output HIGH Current
Output HIGH Voltage
mA
V
VCC = Min.
VIN = VIH or VIL
VCC = Min.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 12mA
VOL
Output LOW Voltage
—
0.3
0.50
V
VIN = VIH or VIL
2565 lnk 07
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. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is ±5µA at TA = –55°C.
6.8
4
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min. Typ.(2) Max.
Unit
∆ICC
VCC = Max.
VIN = 3.4V(3)
—
0.5
2.0
mA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
VIN = VCC FCTxxxT
VIN = GND
—
0.15
0.25
mA/
MHz
Outputs Open
OEA = OEB = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
FCT2xxxT
—
0.06
0.12
IC
Total Power Supply Current(6)
VIN = VCC FCTxxxT
VIN = GND FCT2xxxT
—
—
1.5
0.6
3.5
2.2
mA
Outputs Open
fi = 10MHz
50% Duty Cycle
OEA = OEB = GND
One Bit Toggling
VIN = 3.4
FCTxxxT
—
1.8
4.5
VIN = GND FCT2xxxT
VIN = VCC FCTxxxT
VIN = GND FCT2xxxT
0.9
3.0
1.2
3.2
VCC = Max.
—
—
6.0(5)
3.4(5)
Outputs Open
fi = 2.5MHz
50% Duty Cycle
OEA = OEB = GND
Eight Bits Toggling
VIN = 3.4
FCTxxxT
—
—
5.0
3.2
14.0(5)
11.4(5)
VIN = GND FCT2xxxT
2565 tbl 08
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.
6.8
5
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT240/2240T
FCT240T
FCT240AT
FCT2240T
FCT2240AT
Com'l.
(2)
Mil.
(2)
Com'l.
(2)
Mil.
(2)
(1)
Condition
Symbol
tPLH
Parameter
Propagation Delay
DN to ON
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Unit
CL = 50pF
RL = 500Ω
1.5
8.0
10.0
9.5
1.5
9.0
1.5
4.8
6.2
5.6
1.5
5.1
ns
tPHL
tPZH
tPZL
Output Enable Time
1.5
1.5
1.5
1.5
10.5
10.0
1.5
1.5
1.5
1.5
6.5
5.9
ns
tPHZ
tPLZ
Output Disable Time
ns
2565 tbl 09
FCT240CT
FCT2240CT
FCT240DT
Com'l.
Mil.
(2)
Com'l.
Mil.
(2)
(1)
(2)
Min.
(2)
Min.
Symbol
Parameter
Condition
Max.
Min.
Max.
Max.
Min.
Max.
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay
C
L
= 50pF
= 500Ω
1.5
4.3
1.5
4.7
1.5
3.6
—
—
ns
D
N
to ON
R
L
Output Enable Time
1.5
1.5
5.8
5.2
1.5
1.5
6.5
5.7
1.5
1.5
4.8
4.0
—
—
—
—
ns
Output Disable Time
ns
2565 tbl 10
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT244/2244T
FCT244T
FCT244AT
FCT2244T
FCT2244AT
Com'l.
(2)
Mil.
(2)
Com'l.
(2)
Mil.
(2)
(1)
Condition
Symbol
tPLH
Parameter
Propagation Delay
DN to ON
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Unit
CL = 50pF
RL = 500Ω
1.5
6.5
8.0
7.0
1.5
7.0
1.5
4.8
6.2
5.6
1.5
5.1
ns
tPHL
tPZH
tPZL
Output Enable Time
1.5
1.5
1.5
1.5
8.5
7.5
1.5
1.5
1.5
1.5
6.5
5.9
ns
tPHZ
tPLZ
Output Disable Time
ns
2565 tbl 11
FCT244CT
FCT2244CT
FCT244DT
Com'l.
Mil.
(2)
Com'l.
Mil.
(2)
(1)
(2)
Min.
(2)
Min.
Symbol
tPLH
Parameter
Propagation Delay
DN to ON
Condition
Max.
Min.
Max.
Max.
Min.
Max.
Unit
CL = 50pF
RL = 500Ω
1.5
4.1
1.5
4.6
1.5
3.6
—
—
ns
tPHL
tPZH
tPZL
Output Enable Time
1.5
1.5
5.8
5.2
1.5
1.5
6.5
5.7
1.5
1.5
4.8
4.0
—
—
—
—
ns
tPHZ
tPLZ
Output Disable Time
ns
2565 tbl 12
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
6.8
6
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT540/541/2541T
FCT540T/541T
FCT2541T
FCT540AT/541AT
FCT2541AT
FCT540CT/541CT
FCT2541CT
Com'l.
(2)
Mil.
(2)
Com'l.
(2)
Mil.
(2)
Com'l.
(2)
Mil.
(2)
(1)
Condition
Symbol
tPLH
Parameter
Propagation Delay
DN to ON
Min.
Max. Min.
Max. Min.
Max. Min.
Max. Min.
Max. Min.
Max. Unit
CL = 50pF
RL = 500Ω
1.5 8.5 1.5 9.5 1.5 4.8 1.5 5.1 1.5 4.3 1.5 4.7 ns
1.5 8.0 1.5 9.0 1.5 4.8 1.5 5.1 1.5 4.1 1.5 4.6 ns
1.5 10.0 1.5 10.5 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.5 ns
tPHL
FCT540
tPLH
tPHL
Propagation Delay
DN to ON
FCT541/2541T
Output Enable Time
tPZH
tPZL
tPHZ
tPLZ
Output Disable Time
1.5 9.5 1.5 10.0 1.5 5.6 1.5 5.9 1.5 5.2 1.5 5.7 ns
2565 tbl 13
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
6.8
7
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Switch
VCC
7.0V
Open Drain
Disable Low
Closed
500Ω
500Ω
Enable Low
VOUT
VIN
Open
Pulse
Generator
All Other Tests
D.U.T.
2565 drw 14
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
50pF
C L
T
R
2565 drw 10
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
PULSE
tH
tSU
1.5V
1.5V
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
tREM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
SYNCHRONOUS CONTROL
PRESET
2565 drw 12
3V
1.5V
CLEAR
tSU
tH
0V
CLOCK ENABLE
ETC.
2565 drw 11
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
tPLH
tPHL
tPHL
tPZL
tPLZ
VOH
1.5V
VOL
OUTPUT
3.5V
1.5V
3.5V
VOL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
tPLH
0.3V
0.3V
3V
1.5V
25605Vdrw 13
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
0V
2565 drw 14
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
6.8
8
IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
FCT
IDT
XX
X
XXXX
X
X
Process
Temp. Range
Family
Device Type
Package
Blank
B
Commercial
MIL-STD-883, Class B
P
Plastic DIP
D
CERDIP
SO
L
E
Small Outline IC
Leadless Chip Carrier
CERPACK
PY
Q
Shrink Small Outline Package
Quarter-size Small Outline Package
240T
244T
540T
541T
Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver
Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver
240AT
244AT
540AT
541AT
240CT
244CT
540CT
541CT
240DT
244DT
Blank
2
High Drive
Balanced Drive
54
74
–55°C to +125°C
0°C to +70°C
2565 drw 15
6.8
9
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