CY74FCT2244T [TI]
8-Bit Buffers/Line Drivers; 8位缓冲器/线路驱动器
| 型号： | CY74FCT2244T |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 8-Bit Buffers/Line Drivers |
| 文件： | 总6页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT2240T
CY74FCT2244T
SCCS036 - September 1994 - Revised March 2000
8-Bit Buffers/Line Drivers
Features
Functional Description
• Function and pinout compatible with FCT and F logic
• 25Ω output series resistors to reduce transmission line
reflection noise
• FCT-C speed at 4.1 ns max. (Com’l) FCT-A speed at 4.8
ns max. (Com’l)
• TTL output level versions of equivalent FCT functions
• Edge-rate control circuitry for significantly improved
noise characteristics
• Power-off disable feature permits live insertion
• ESD > 2000V
• Fully compatible with TTL input and output logic levels
The FCT2240T and FCT2244T are octal buffers and line
drivers that include on-chip 25Ω terminating resistors at each
of the outputs, to minimize noise resulting from reflections or
standing waves in high-performance applications. The on-chip
resistors reduce overall board space and component count.
Designed to be employed as memory address drivers, clock
drivers, and bus-oriented transmitters/receivers, these devic-
es provide speed and drive capabilities commensurate with
their fastest bipolar logic counterparts while reducing power
dissipation. The input and output voltage levels allow direct
interface with TTL, NMOS, and CMOS devices without the
need for external components.
• Sink current 12 mA
Source current15 mA
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
• Extended commercial temp. range of –40˚C to +85˚C
• Three-state outputs
Logic Block Diagram FCT2240T
Pin Configurations
OE
A
SOIC/QSOP
Top View
OE
B
1
DA
0
20
OA
0
OE
A
V
CC
2
3
4
5
6
19
DA
OE
B
0
DB
OB
0
0
18
17
16
OB
0
OA
0
DA
1
DB
0
DA
1
OA
1
FCT2240T
OB
1
OA
1
15
14
DA
2
DB
1
OB
1
DB
1
7
8
9
OB
2
OA
2
DA
2
13
12
11
DA
3
DB
2
OA
2
OB
3
OA
3
OB
2
DB
2
10
GND
DB
3
FCT2240T
–3
DA
3
OA
3
DB
OB
3
3
FCT2240T–2
Logic Block Diagram FCT2244T
DIP/SOIC/QSOP
Top View
OE
A
OE
B
1
V
CC
20
OE
A
2
3
4
5
6
19
DA
0
OE
B
DA
0
OA
0
18
17
OB
0
OA
0
DB
DA
1
DB
0
OB
0
0
FCT2244T 16
OB
1
OA
1
DA
1
OA
1
DB
15
14
DA
2
1
OA
2
7
8
9
OB
2
OB
1
DB
1
DB
13
12
DA
3
2
OB
3
OA
3
DA
2
OA
2
10
11
GND
DB
3
OB
2
DB
2
FCT2240T–6
DA
3
OA
3
DB
OB
3
3
FCT2240T–4
Copyright © 2000, Texas Instruments Incorporated
CY74FCT2240T
CY74FCT2244T
]
Function Table FCT2240T[1]
Function Table FCT2244T[1]
Inputs
Inputs
OEA
OEB
D
Output
OEA
OEB
D
Output
L
L
H
L
L
H
L
H
X
H
L
Z
L
L
H
L
L
H
L
H
X
L
H
Z
Maximum Ratings[2, 3]
DC Output Current (Maximum Sink Current/Pin) ......120 mA
Power Dissipation..........................................................0.5W
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Storage Temperature .................................–65°C to +150°C
Ambient Temperature with
Power Applied.............................................–65°C to +135°C
Operating Range
Ambient
Supply Voltage to Ground Potential ............... –0.5V to +7.0V
DC Input Voltage............................................ –0.5V to +7.0V
DC Output Voltage......................................... –0.5V to +7.0V
Range
Range
Temperature
VCC
Commercial T, AT, CT
–40°C to +85°C
5V ± 5%
Electrical Characteristics Over the Operating Range
Parameter
VOH
VOL
ROUT
VIH
Description
Output HIGH Voltage
Output LOW Voltage
Output Resistance
Input HIGH Voltage
Input LOW Voltage
Hysteresis[6]
Test Conditions
Min.
Typ.[5]
3.3
Max.
Unit
V
VCC=Min., IOH=–15 mA
VCC=Min., IOL=12 mA
VCC=Min., IOL=12 mA
Com’l
Com’l
Com’l
2.4
0.3
0.55
40
V
20
25
Ω
2.0
V
VIL
0.8
V
VH
All inputs
0.2
V
VIK
Input Clamp Diode Voltage
Input HIGH Current
Input HIGH Current
Input LOW Current
VCC=Min., IIN=–18 mA
VCC=Max., VIN=VCC
VCC=Max., VIN=2.7V
VCC=Max., VIN=0.5V
VCC=Max., VOUT=2.7V
–0.7
–1.2
5
V
II
µA
µA
µA
µA
IIH
±1
±1
10
IIL
IOZH
Off State HIGH-Level
Output Current
IOZL
IOS
Off State LOW-Level
Output Current
Output Short Circuit Current[7] VCC=Max., VOUT=0.0V
VCC=Max., VOUT=0.5V
–10
µA
–60
–120
–225
mA
IOFF
Power-Off Disable VCC=0V, VOUT=4.5V
±1
µA
Notes:
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.
2. Unless otherwise noted, these limits are over the operating free-air temperature range.
3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
4. TA is the “instant on” case temperature.
5. Typical values are at VCC=5.0V, TA=+25˚C ambient.
6. This parameter is specified but not tested.
7. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of
a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, IOS tests should be performed last.
2
CY74FCT2240T
CY74FCT2244T
Capacitance[6]
Parameter
CIN
Description
Typ. [5]
Max.
10
Unit
pF
Input Capacitance
Output Capacitance
5
9
COUT
12
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
VCC=Max., VIN < 0.2V,
IN > VCC–0.2V
Typ.[5]
Max.
Unit
ICC
Quiescent Power Supply Current
0.1
0.2
mA
V
∆ICC
Quiescent Power Supply Current
(TTL inputs)
VCC=Max., VIN=3.4V,[8]
f1=0, Outputs Open
0.5
2.0
mA
ICCD
Dynamic Power Supply
Current[9]
VCC=Max., One Input Toggling,
50% Duty Cycle, Outputs Open,
OE1=OE2=GND,
0.06
0.12
mA/
MHz
VIN < 0.2V or VIN > VCC–0.2V
IC
Total Power Supply Current[10]
VCC=Max., 50% Duty Cycle,
Outputs Open,
One Bit Toggling at f1=10 MHz,
0.7
1.0
1.3
3.3
1.4
2.4
mA
mA
mA
mA
OE1=OE2=GND,
VIN < 0.2V or VIN > VCC–0.2V
VCC=Max.,
50% Duty Cycle, Outputs Open,
One Bit Toggling at f1=10 MHz,
OE1=OE2=GND,
VIN=3.4V or VIN=GND
VCC=Max.,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f1=2.5 MHz,
OE1=OE2=GND,
2.6[11]
VIN < 0.2V or VIN > VCC–0.2V
VCC=Max.,
10.6[11]
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f1=2.5 MHz,
OE1=OE2=GND,
VIN=3.4V or VIN=GND
Notes:
8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
10. IC
IC
=
=
=
=
=
=
=
=
=
=
IQUIESCENT + IINPUTS + IDYNAMIC
ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
Quiescent Current with CMOS input levels
Power Supply Current for a TTL HIGH input (VIN=3.4V)
Duty Cycle for TTL inputs HIGH
ICC
∆ICC
DH
NT
ICCD
f0
Number of TTL inputs at DH
Dynamic Current caused by an input transition pair (HLH or LHL)
Clock frequency for registered devices, otherwise zero
Input signal frequency
f1
N1
Number of inputs changing at f1
All currents are in milliamps and all frequencies are in megahertz.
11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
3
CY74FCT2240T
CY74FCT2244T
Switching Characteristics FCT2240T Over the Operating Range[12]
FCT2240T
FCT2240AT
Commercial
FCT2240CT
Commercial
Commercial
Fig.
Parameter
tPLH
tPHL
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
No.[13]
Propagation Delay
Data to Input
1.5
8.0
10.0
9.5
1.5
8.0
10.0
9.5
1.5
4.1
5.8
5.2
ns
1, 2
tPZH
tPZL
Output Enable Time
1.5
1.5
1.5
1.5
1.5
1.5
ns
ns
1, 7, 8
1, 7, 8
tPHZ
tPLZ
Output Disable Time
Switching Characteristics FCT2244T Over the Operating Range[12]
FCT2244T
FCT2244AT
Commercial
FCT2244CT
Commercial
Commercial
Fig.
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
No.[13]
tPLH
tPHL
Propagation Delay
Data to Input
1.5
6.5
1.5
4.6
1.5
4.1
ns
1, 3
tPZH
tPZL
Output Enable Time
1.5
1.5
8.0
7.0
1.5
1.5
6.2
5.6
1.5
1.5
5.8
5.2
ns
ns
1, 7, 8
1, 7, 8
tPHZ
tPLZ
Output Disable Time
Notes:
12. Minimum limits are specified but not tested on Propagation Delays.
13. See “Parameter Measurement Information” in the General Information section.
Ordering Information
Speed
(ns)
Package
Name
Operating
Range
Ordering Code
CY74FCT2240CTQCT
Package Type
4.1
Q5
S5
Q5
S5
20-Lead (150-Mil) QSOP
Commercial
CY74FCT2240CTSOC/SOCT
CY74FCT2240ATQCT
20-Lead (300-Mil) Molded SOIC
20-Lead (150-Mil) QSOP
4.8
8.0
Commercial
Commercial
CY74FCT2240TSOC/SOCT
20-Lead (300-Mil) Molded SOIC
Speed
(ns)
Package
Name
Operating
Range
Ordering Code
CY74FCT2244CTQCT
Package Type
20-Lead (150-Mil) QSOP
4.3
4.6
6.5
Q5
S5
Q5
S5
Q5
S5
Commercial
Commercial
Commercial
CY74FCT2244CTSOC/SOCT
CY74FCT2244ATQCT
20-Lead (300-Mil) Molded SOIC
20-Lead (150-Mil) QSOP
CY74FCT2244ATSOC/SOCT
CY74FCT2244TQCT
20-Lead (300-Mil) Molded SOIC
20-Lead (150-Mil) QSOP
CY74FCT2244TSOC/SOCT
20-Lead (300-Mil) Molded SOIC
Document #: 38-00341-B
4
CY74FCT2240T
CY74FCT2244T
Package Diagrams
20-Lead Quarter Size Outline Q5
20-Lead (300-Mil) Molded SOIC S5
5
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Copyright 2000, Texas Instruments Incorporated
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