Texas Instruments CY74FCT2244CTQCT, CY74FCT2244CTQC, CY74FCT2244ATSOCT, CY74FCT2244ATSOC, CY74FCT2244ATQCT Datasheet

8-Bit Buffers/Line Drivers

CY74FCT2240T

CY74FCT2244T

CCS036 - September 1994 - Revised March 2000

Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.

Copyright © 2000, Texas Instruments Incorporated

Features

• Function and pinout compatible with FCT and F logic

• 25Ωoutputseriesresistorstoreducetransmissionline

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

Functional Description

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 wavesin 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 liv e insertion of boards.

Logic Block Diagram FCT2240T Pin Configurations

FCT2240T–2

1
2
3
4
5
6
7
8
9
10 11

12

16

17

18

19

20

13

14

OE

A

DA

0

OB

0

DA

1

OB

1

DA

2

DA

3

GND

V

CC

FCT2240T

–3

15

SOIC/QSOP

Top View

OB

2

OB

3

OE

B

OA

0

OA

2

DB

2

DB

3

OA

3

DB

0

OA

1

DB

1

OE

B

OE

A

DA

0

OB

0

DA

1

OB

1

DA

2

DA

3

OB

2

OB

3

OA

0

OA

2

DB

2

DB

3

OA

3

DB

0

OA

1

DB

1

Logic Block Diagram FCT2244T

1
2
3
4
5
6
7
8
9
10 11

12

16

17

18

19

20

13

14

OE

A

DA

0

OB

0

DA

1

OB

1

DA

2

DA

3

GND

V

CC

15

DIP/SOIC/QSOP

Top View

OB

2

OB

3

OE

B

OA

0

OA

2

DB

2

DB

3

OA

3

DB

0

OA

1

DB

1

OE

B

OE

A

DA

0

OB

0

DA

1

OB

1

DA

2

DA

3

OB

2

OB

3

OA

0

OA

2

DB

2

DB

3

OA

3

DB

0

OA

1

DB

1

FCT2240T–4

FCT2240T–6

FCT2240T

FCT2244T

CY74FCT2240T

CY74FCT2244T

2

]

Maximum Ratings

[2, 3]

(Above which the useful life may be impaired. For user guide­lines, not tested.)

Storage Temperature .................................–65°C to +150°C

Ambient Temperature with

Power Applied.............................................–65°C to +135°C

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

DC Output Current (Maximum Sink Current/Pin) ......120 mA

Power Dissipation..........................................................0.5W

Static Discharge Voltage............................................>2001V

(per MIL-STD-883, Method 3015)

Function Table FCT2240T

[1]

Inputs

OutputOE

A

OE

B

D

L
L

H

L
L

H

L
H
X

H

L

Z

Function Table FCT2244T

[1]

Inputs

OutputOE

A

OE

B

D

L
L

H

L
L

H

L
H
X

L
H
Z

Operating Range

Range Range

Ambient

Temperature V

CC

Commercial T, AT, CT –40°C to +85°C 5V ± 5%

Electrical Characteristics Over the Operating Range

Parameter Description Test Conditions Min. Typ.

[5]

Max. Unit

V

OH

Output HIGH Voltage VCC=Min., IOH=–15 mA Com’l 2.4 3.3 V

V

OL

Output LOW Voltage VCC=Min., IOL=12 mA Com’l 0.3 0.55 V

R

OUT

Output Resistance VCC=Min., IOL=12 mA Com’l 20 25 40 Ω

V

IH

Input HIGH Voltage 2.0 V

V

IL

Input LOW Voltage 0.8 V

V

H

Hysteresis

[6]

All inputs 0.2 V

V

IK

Input Clamp Diode Voltage VCC=Min., IIN=–18 mA –0.7 –1.2 V

I

I

Input HIGH Current VCC=Max., VIN=V

CC

5 µA

I

IH

Input HIGH Current VCC=Max., VIN=2.7V ±1 µA

I

IL

Input LOW Current VCC=Max., VIN=0.5V ±1 µA

I

OZH

Off State HIGH-Level
Output Current

VCC=Max., V

OUT

=2.7V 10 µA

I

OZL

Off State LOW-Level
Output Current

VCC=Max., V

OUT

=0.5V –10 µA

I

OS

Output Short Circuit Current

[7]

VCC=Max., V

OUT

=0.0V –60 –120 –225 mA

I

OFF

Power-Off Disable VCC=0V, V

OUT

=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 V

CC

or ground.

4. T

A

is the “instant on” case temperature.

5. Typical values are at V

CC

=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 exceedone 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, I

OS

tests should be performed last.

CY74FCT2240T

CY74FCT2244T

3

Capacitance

[6]

Parameter Description Typ.

[5]

Max. Unit

C

IN

Input Capacitance 5 10 pF

C

OUT

Output Capacitance 9 12 pF

Power Supply Characteristics

Parameter Description Test Conditions Typ.

[5]

Max. Unit

I

CC

Quiescent Power Supply Current VCC=Max., VIN< 0.2V,

V

IN

> VCC–0.2V

0.1 0.2 mA

∆I

CC

Quiescent Power Supply Current
(TTL inputs)

VCC=Max., VIN=3.4V,

[8]

f1=0, Outputs Open

0.5 2.0 mA

I

CCD

Dynamic Power Supply
Current

[9]

VCC=Max., One Input Toggling,
50% Duty Cycle, Outputs Open,
OE1=OE2=GND,
V

IN

< 0.2V or VIN> VCC–0.2V

0.06 0.12 mA/
MHz

I

C

Total Power Supply Current

[10]

VCC=Max., 50% Duty Cycle,
Outputs Open,
One Bit Toggling at f

1

=10 MHz,
OE1=OE2=GND,
V

IN

< 0.2V or VIN> VCC–0.2V

0.7 1.4 mA

VCC=Max.,
50% Duty Cycle, Outputs Open,
One Bit Toggling at f

1

=10 MHz,
OE1=OE2=GND,
V

IN

=3.4V or VIN=GND

1.0 2.4 mA

VCC=Max.,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f

1

=2.5 MHz,
OE1=OE2=GND,
V

IN

< 0.2V or VIN> VCC–0.2V

1.3 2.6

[11]

mA

VCC=Max.,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f

1

=2.5 MHz,
OE1=OE2=GND,
V

IN

=3.4V or VIN=GND

3.3 10.6

[11]

mA

Notes:

8. Per TTL driven input (V

IN

=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. I

C

=I

QUIESCENT

+ I

INPUTS

+ I

DYNAMIC

IC=ICC+∆ICCDHNT+I

CCD(f0

/2 + f1N1)

I

CC

= Quiescent Current with CMOS input levels

∆I

CC

= Power Supply Current for a TTL HIGH input (VIN=3.4V)

D

H

= Duty Cycle for TTL inputs HIGH

N

T

= Number of TTL inputs at D

H

I

CCD

= Dynamic Current caused by an input transition pair (HLH or LHL)

f

0

= Clock frequency for registered devices, otherwise zero

f

1

= Input signal frequency

N

1

= Number of inputs changing at f

1

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.

CY74FCT2240T

CY74FCT2244T

4

Document #: 38-00341-B

Switching Characteristics FCT2240T Over the Operating Range

[12]

Parameter Description

FCT2240T FCT2240AT FCT2240CT

Unit

Fig.

No.

[13]

Commercial Commercial Commercial

Min. Max. Min. Max. Min. Max.

t

PLH

t

PHL

Propagation Delay
Data to Input

1.5 8.0 1.5 8.0 1.5 4.1 ns 1, 2

t

PZH

t

PZL

Output Enable Time 1.5 10.0 1.5 10.0 1.5 5.8 ns 1, 7, 8

t

PHZ

t

PLZ

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

Unit

Fig.

No.

[13]

Commercial Commercial Commercial

Min. Max. Min. Max. Min. Max.

t

PLH

t

PHL

Propagation Delay
Data to Input

1.5 6.5 1.5 4.6 1.5 4.1 ns 1, 3

t

PZH

t

PZL

Output Enable Time 1.5 8.0 1.5 6.2 1.5 5.8 ns 1, 7, 8

t

PHZ

t

PLZ

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) Ordering Code

Package

Name Package Type

Operating

Range

4.1 CY74FCT2240CTQCT Q5 20-Lead (150-Mil) QSOP 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) Ordering Code

Package

Name Package Type

Operating

Range

4.3 CY74FCT2244CTQCT Q5 20-Lead (150-Mil) QSOP Commercial
CY74FCT2244CTSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC

4.6 CY74FCT2244ATQCT Q5 20-Lead (150-Mil) QSOP Commercial
CY74FCT2244ATSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC

6.5 CY74FCT2244TQCT Q5 20-Lead (150-Mil) QSOP Commercial
CY74FCT2244TSOC/SOCT S5 20-Lead (300-Mil) Molded SOIC

CY74FCT2240T

CY74FCT2244T

5

Package Diagrams

20-Lead Quarter Size Outline Q5

20-Lead (300-Mil) Molded SOIC

S5

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Copyright  2000, Texas Instruments Incorporated