TI CY74FCT2244TSOCT 8-bit buffers/line driver Datasheet

Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT2240T
CY74FCT2244T
8-Bit Buffers/Line Drivers
SCCS036 - September 1994 - Revised March 2000
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
• Sink current 12 mA
Source current15 mA
• Extended commercial temp. range of –40˚C to +85˚C
• Three-state outputs
Logic Block Diagram FCT2240T
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 devices 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.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Pin Configurations
OEA
SOIC/QSOP
Top View
OEB
DA0
OA0
OB0
DB0
DA1
OA1
OB1
DB1
DA2
OA2
OB2
DB2
DA3
OA3
OB3
DB3
OEA
1
20
VCC
DA0
2
19
OEB
OB0
3
18
OA0
DA1
4
17
DB0
OB1
5 FCT2240T 16
OA1
DA2
6
15
DB1
OB2
7
14
OA2
DA3
8
13
DB2
OB3
9
12
OA3
GND
10
11
DB3
FCT2240T–3
FCT2240T–2
Logic Block Diagram FCT2244T
DIP/SOIC/QSOP
Top View
OEA
OE B
DA0
OB0
DA1
OB1
OA0
DB0
OA1
DB1
DA2
OA2
OB2
DB2
DA3
OA3
OB3
OEA
1
20
VCC
DA0
2
19
OE B
OB0
3
18
OA0
DA1
4
17
DB0
OB1
5 FCT2244T 16
OA1
DA2
6
15
DB1
OB2
7
14
OA2
DA3
8
13
DB2
OB3
9
12
OA3
GND
10
11
DB3
FCT2240T–6
DB3
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 guidelines, not tested.)
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Storage Temperature .................................–65°C to +150°C
Operating Range
Ambient Temperature with
Power Applied .............................................–65°C to +135°C
Range
Range
Ambient
Temperature
VCC
Commercial
T, AT, CT
–40°C to +85°C
5V ± 5%
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
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
Min.
Typ.[5]
2.4
3.3
VOH
Output HIGH Voltage
VCC=Min., IOH=–15 mA
Com’l
VOL
Output LOW Voltage
VCC=Min., IOL=12 mA
Com’l
ROUT
Output Resistance
VCC=Min., IOL=12 mA
Com’l
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VH
Hysteresis[6]
All inputs
0.2
VIK
Input Clamp Diode Voltage
VCC=Min., IIN=–18 mA
–0.7
II
Input HIGH Current
IIH
IIL
20
Max.
Unit
V
0.3
0.55
V
25
40
Ω
2.0
V
0.8
V
V
–1.2
V
VCC=Max., VIN=VCC
5
µA
Input HIGH Current
VCC=Max., VIN=2.7V
±1
µA
Input LOW Current
VCC=Max., VIN=0.5V
±1
µA
IOZH
Off State HIGH-Level
Output Current
VCC=Max., VOUT=2.7V
10
µA
IOZL
Off State LOW-Level
Output Current
VCC=Max., VOUT=0.5V
–10
µA
IOS
Output Short Circuit Current[7]
VCC=Max., VOUT=0.0V
–225
mA
IOFF
Power-Off Disable
VCC=0V, VOUT=4.5V
±1
µA
–60
–120
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
Description
Typ. [5]
Max.
Unit
CIN
Input Capacitance
5
10
pF
COUT
Output Capacitance
9
12
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
Typ.[5]
Max.
Unit
ICC
Quiescent Power Supply Current
VCC=Max., VIN < 0.2V,
VIN > VCC–0.2V
0.1
0.2
mA
∆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,
VIN < 0.2V or VIN > VCC–0.2V
0.06
0.12
mA/
MHz
IC
Total Power Supply Current[10]
VCC=Max., 50% Duty Cycle,
Outputs Open,
One Bit Toggling at f1=10 MHz,
OE1=OE2=GND,
VIN < 0.2V or VIN > VCC–0.2V
0.7
1.4
mA
VCC=Max.,
50% Duty Cycle, Outputs Open,
One Bit Toggling at f1=10 MHz,
OE1=OE2=GND,
VIN=3.4V or VIN=GND
1.0
2.4
mA
VCC=Max.,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f1=2.5 MHz,
OE1=OE2=GND,
VIN < 0.2V or VIN > VCC–0.2V
1.3
2.6[11]
mA
VCC=Max.,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f1=2.5 MHz,
OE1=OE2=GND,
VIN=3.4V or VIN=GND
3.3
10.6[11]
mA
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.
= IQUIESCENT + IINPUTS + IDYNAMIC
10. IC
IC
= ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC = Quiescent Current with CMOS input levels
∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V)
= Duty Cycle for TTL inputs HIGH
DH
= Number of TTL inputs at DH
NT
ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)
= Clock frequency for registered devices, otherwise zero
f0
= Input signal frequency
f1
= Number of inputs changing at f1
N1
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
Parameter
Description
FCT2240AT
FCT2240CT
Commercial
Commercial
Commercial
Min.
Max.
Min.
Max.
Min.
Max.
Unit
Fig.
No.[13]
tPLH
tPHL
Propagation Delay
Data to Input
1.5
8.0
1.5
8.0
1.5
4.1
ns
1, 2
tPZH
tPZL
Output Enable Time
1.5
10.0
1.5
10.0
1.5
5.8
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
1.5
9.5
1.5
9.5
1.5
5.2
ns
1, 7, 8
Switching Characteristics FCT2244T Over the Operating Range[12]
Parameter
Description
FCT2244T
FCT2244AT
FCT2244CT
Commercial
Commercial
Commercial
Min.
Max.
Min.
Max.
Min.
Max.
Unit
Fig.
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
8.0
1.5
6.2
1.5
5.8
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
1.5
7.0
1.5
5.6
1.5
5.2
ns
1, 7, 8
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)
4.1
Ordering Code
CY74FCT2240CTQCT
Package
Name
Package Type
Q5
20-Lead (150-Mil) QSOP
Operating
Range
Commercial
CY74FCT2240CTSOC/SOCT
S5
20-Lead (300-Mil) Molded SOIC
4.8
CY74FCT2240ATQCT
Q5
20-Lead (150-Mil) QSOP
Commercial
8.0
CY74FCT2240TSOC/SOCT
S5
20-Lead (300-Mil) Molded SOIC
Commercial
Speed
(ns)
4.3
4.6
6.5
Ordering Code
CY74FCT2244CTQCT
Package
Name
Package Type
Q5
20-Lead (150-Mil) QSOP
CY74FCT2244CTSOC/SOCT
S5
20-Lead (300-Mil) Molded SOIC
CY74FCT2244ATQCT
Q5
20-Lead (150-Mil) QSOP
CY74FCT2244ATSOC/SOCT
S5
20-Lead (300-Mil) Molded SOIC
CY74FCT2244TQCT
Q5
20-Lead (150-Mil) QSOP
CY74FCT2244TSOC/SOCT
S5
20-Lead (300-Mil) Molded SOIC
Document #: 38-00341-B
4
Operating
Range
Commercial
Commercial
Commercial
CY74FCT2240T
CY74FCT2244T
Package Diagrams
20-Lead Quarter Size Outline Q5
20-Lead (300-Mil) Molded SOIC S5
5
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