Datasheet IDT74FCT540TSOB, IDT74FCT541TLB, IDT74FCT541TL, IDT74FCT541TEB, IDT74FCT541TE Datasheet (Integrated Device Technology)

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

6.8 1

Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES DECEMBER 1995

1996 Integrated Device Technology, Inc. 6.8 DSC-2565/6

1

DESCRIPTION:

The IDT octal buffer/line drivers are built using an advanced
dual metal CMOS technology. The FCT240T/FCT2240T and
FCT244T/FCT2244T are designed to be employed as memory
and address drivers, clock drivers and bus-oriented transmit­ter/receivers which provide improved board density.

The FCT540T and FCT541T/FCT2541T are similar in
function to the FCT240T/FCT2240T and FCT244T/FCT2244T,
respectively, except that the inputs and outputs 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.

The FCT2240T, FCT2244T and FCT2541T have balanced
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 resis­tors. FCT2xxxT parts are plug-in replacements for FCTxxxT
parts.

FAST CMOS OCTAL
BUFFER/LINE
DRIVERS

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

IDT54/74FCT240T/AT/CT/DT - 2240T/AT/CT
IDT54/74FCT244T/AT/CT/DT - 2244T/AT/CT

IDT54/74FCT540T/AT/CT

IDT54/74FCT541/2541T/AT/CT

FEATURES:

• Common features:

– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility

– VOH = 3.3V (typ.)
– V

OL = 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

2565 drw 03

2565 drw 02

2565 drw 01

DA0

DA1

DA2

DA3

DB0

DB1

DB2

DB3

FCT240/2240T

DA0
OB0
DA1
OB1
DA2

OB2
DA3

OB3

OA0
DB0
OA1

DB1

DB2

DB3

OA2

OA3

FCT244/2244T

D0 O0
D1

D2
D3
D4
D5
D6
D7

O1
O2
O3
O4
O5
O6
O7

FCT540/541/2541T

*Logic diagram shown for 'FCT540.
'FCT541/2541T is the non-inverting option.

OE

A

OE

B

OE

A

OE

B

OE

A

OB

0

OB

1

OB

2

OB3

OE

B

OA

0

OA

1

OA

2

OA

3

FUNCTIONAL BLOCK DIAGRAMS

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

6.8 2

PIN CONFIGURATIONS

FCT240/2240T

FCT244/2244T

2565 drw 08

2565 drw 04

2565 drw 07

DA0

DA1

DA2

DA3

GND

DB

0

DB1

DB2

DB3

VCC1

2
3

4
5
6
7
8
9
10 11

12

13

14

15

16

17

18

19

20

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

P20-1

D20-1
SO20-2
SO20-7
SO20-8

&

E20-1

INDEX

DA1

DA2

DA3

DB0

DB1

DA0

OB0

OEA

VCC

OEB

OB3

GND

DB

3

OA3

DB2

LCC

TOP VIEW

3 2 20 19

1

4
5
6
7
8

18
17
16
15
14

9 10111213

L20-2

OEA

OB0

OB1

OB2

OB3

OEB

OA0

OA1

OA2

OA3

OB1

OB2

OA0

OA1

OA2

DA

0

OB

0

DA

1

OB

1

DA

2

OB

2

DA

3

OB

3

GND

OA

0

DB

0

OA

1

DB

1

DB

2

DB

3

OA

2

OA

3

V

CC

1
2

3
4
5
6
7
8
9
10

11

12

13

14

15

16

17

18

19

20

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

P20-1

D20-1
SO20-2
SO20-7
SO20-8

&

E20-1

INDEX

DA

1

OB

1

DA

2

OB

2

DA

3

OA

0

DB

0

OA

1

DB

1

OA

2

DA

0

OB

0

V

CC

OE

B

*

OB

3

GND

DB

3

OA

3

DB

2

LCC

TOP VIEW

3 2 20 19

1

4
5
6
7
8

18
17
16
15
14

910 1213

L20-2

11

OE

B

OE

A

OE

A

2565 drw 05

FCT540/541/2541T

D0

D2
D3

D4
D5
D6
D7

GND

O

0*

O

1*

O

2*

O

3*

O

5*

O

7*

O

4*

O

6*

V

CC1

2
3
4

5
6
7
8
9
10

11

12

13

14

15

16

17

18

19

20

DIP/SOIC/QSOP/CERPACK

TOP VIEW

P20-1

D20-1
SO20-2
SO20-8

&

E20-1

INDEX

D2
D3
D4
D5
D6

O0*
O

1*

O

2*

O

3*

O

4*

LCC

TOP VIEW

3 2 20 19

1

4
5
6
7
8

18
17
16
15
14

9 10111213

L20-2

D1

D0

VCC

D7

GND

O

7*O6*O5*

OEA

OEA

OEB

OEB

D1

2565 drw 06 2565 drw 09

*Ox for 540, Ox for 541/2541T

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

6.8 3

PIN DESCRIPTION FUNCTION TABLE

ABSOLUTE MAXIMUM RATINGS

(1)

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol Rating Commercial Military Unit

VTERM

(2)

Terminal Voltage
with Respect to
GND

–0.5 to +7.0 –0.5 to +7.0 V

VTERM

(3)

Terminal Voltage
with Respect to
GND

–0.5 to

V

CC +0.5

–0.5 to

VCC +0.5

V

TA Operating

Temperature

0 to +70 –55 to +125 °C

TBIAS Temperature

Under Bias

–55 to +125 –65 to +135 °C

TSTG Storage

Temperature

–55 to +125 –65 to +150 °C

PT Power Dissipation 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 RAT­INGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
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
V

CC by +0.5V unless otherwise noted.

2. Input and V

CC terminals only.

3. Outputs and I/O terminals only.

NOTES:

2565 tbl 02

1. H = High Voltage Level
X = Don’t Care
L = Low Voltage Level
Z = High Impedance

Symbol Parameter

(1)

Conditions Typ. Max. Unit

CIN Input

Capacitance

VIN = 0V 6 10 pF

COUT Output

Capacitance

VOUT = 0V 8 12 pF

2565 lnk 04

NOTE:

1. This parameter is measured at characterization but not tested.

Pin Names Description

OE

A, OEB 3–State Output Enable Inputs (Active LOW)

Dxx Inputs
Oxx Outputs

2565 tbl 01

Inputs

(1)

Outputs

(1)

OE

OE

A

OE

OE

B D 240 244 540 541

LLLHLHL
LLHLHLH

H H X ZZZZ

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

6.8 4

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 Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
II H Input HIGH Current

(4)

VCC = Max. VI = 2.7V — — ±1 µA

II L Input LOW Current

(4)

VI = 0.5V — — ±1
IOZH High Impedance Output Current VCC = Max. VO = 2.7V — — ±1 µA
IOZL (3-State Output pins)

(4)

VO = 0.5V — — ±1

II Input HIGH Current

(4)

VCC = Max., VI = VCC (Max.) — — ±1 µA
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
VH Input Hysteresis — — 200 — mV
ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.01 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.

V

IN = VIH or VIL

IOH = –6mA MIL.
I

OH = –8mA COM'L.

2.4 3.3 — V

IOH = –12mA MIL.
I

OH = –15mA COM'L.

2.0 3.0 — V

VOL Output LOW Voltage VCC = Min.

V

IN = VIH or VIL

IOL = 48mA MIL.
I

OL = 64mA COM'L.

— 0.3 0.55 V

IOS Short Circuit Current VCC = Max., VO = GND

(3)

–60 –120 –225 mA

2565 lnk 06

OUTPUT DRIVE CHARACTERISTICS FOR FCT2240/2244/2541T

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 T

A = –55°C.

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

IODL Output LOW Current VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V

(3)

16 48 — mA

IODH Output HIGH Current VCC = 5V, VIN = VIH or V

IL,

VOUT = 1.5V

(3)

–16 –48 — mA

VOH Output HIGH Voltage VCC = Min.

V

IN = VIH or VIL

IOH = –12mA MIL.
I

OH = –15mA COM'L.

2.4 3.3 — V

VOL Output LOW Voltage VCC = Min.

V

IN = VIH or VIL

IOL = 12mA — 0.3 0.50 V

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

6.8 5

POWER SUPPLY CHARACTERISTICS

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

∆ICC Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.
V

IN = 3.4V

(3)

— 0.5 2.0 mA

ICCD Dynamic Power Supply

Current

(4)

VCC = Max.
Outputs Open

OE

A = OEB = GND

VIN = VCC
VIN = GND

FCTxxxT — 0.15 0.25 mA/

MHz

One Input Toggling
50% Duty Cycle

FCT2xxxT — 0.06 0.12

IC Total Power Supply Current

(6)

VCC = Max. VIN = VCC FCTxxxT — 1.5 3.5 mA
Outputs Open

fi = 10MHz

VIN = GND FCT2xxxT — 0.6 2.2

50% Duty Cycle

OE

A = OEB = GND

V

IN = 3.4 FCTxxxT — 1.8 4.5

One Bit Toggling VIN = GND FCT2xxxT 0.9 3.2
VCC = Max. VIN = VCC FCTxxxT — 3.0 6.0

(5)

Outputs Open
fi = 2.5MHz

VIN = GND FCT2xxxT — 1.2 3.4

(5)

50% Duty Cycle

OE

A = OEB = GND

VIN = 3.4 FCTxxxT — 5.0 14.0

(5)

Eight Bits Toggling VIN = GND FCT2xxxT — 3.2 11.4

(5)

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 V

CC = 5.0V, +25°C ambient.

3. Per TTL driven input (V

IN = 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 I

CC formula. These limits are guaranteed but not tested.

6. I

C = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
I

CC = Quiescent Current

∆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 DH

ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f

CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

f

i = Input Frequency

N

i = Number of Inputs at fi

All currents are in milliamps and all frequencies are in megahertz.

2565 tbl 08

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

6.8 6

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT240/2240T

2565 tbl 09

2565 tbl 10

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT244/2244T

2565 tbl 11

NOTES:

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

2565 tbl 12

FCT240T

FCT2240T

FCT240AT

FCT2240AT

Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

tPLH
tPHL

Propagation Delay
D

N to ON

CL = 50pF

R

L = 500Ω

1.5 8.0 1.5 9.0 1.5 4.8 1.5 5.1 ns

tPZH
tPZL

Output Enable Time 1.5 10.0 1.5 10.5 1.5 6.2 1.5 6.5 ns

tPHZ
tPLZ

Output Disable Time 1.5 9.5 1.5 10.0 1.5 5.6 1.5 5.9 ns

FCT240CT

FCT2240CT FCT240DT

Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

t

PLH

t

PHL

Propagation Delay
D

N

to

O

N

CL = 50pF

R

L

= 500

Ω

1.5 4.3 1.5 4.7 1.5 3.6 — — ns

t

PZH

t

PZL

Output Enable Time 1.5 5.8 1.5 6.5 1.5 4.8 — — ns

t

PHZ

t

PLZ

Output Disable Time 1.5 5.2 1.5 5.7 1.5 4.0 — — ns

FCT244T

FCT2244T

FCT244AT

FCT2244AT

Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

tPLH
tPHL

Propagation Delay
D

N to ON

CL = 50pF

R

L = 500Ω

1.5 6.5 1.5 7.0 1.5 4.8 1.5 5.1 ns

tPZH
tPZL

Output Enable Time 1.5 8.0 1.5 8.5 1.5 6.2 1.5 6.5 ns

tPHZ
tPLZ

Output Disable Time 1.5 7.0 1.5 7.5 1.5 5.6 1.5 5.9 ns

FCT244CT

FCT2244CT FCT244DT

Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

tPLH
tPHL

Propagation Delay
D

N to ON

CL = 50pF

R

L = 500Ω

1.5 4.1 1.5 4.6 1.5 3.6 — — ns

tPZH
tPZL

Output Enable Time 1.5 5.8 1.5 6.5 1.5 4.8 — — ns

tPHZ
tPLZ

Output Disable Time 1.5 5.2 1.5 5.7 1.5 4.0 — — ns

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

6.8 7

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT540/541/2541T

NOTES:

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

2565 tbl 13

FCT540T/541T

FCT2541T

FCT540AT/541AT

FCT2541AT

FCT540CT/541CT

FCT2541CT

Com'l. Mil. Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

tPLH
tPHL

Propagation Delay
D

N to ON

FCT540

C

L = 50pF

R

L = 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

tPLH
tPHL

Propagation Delay
D

N to ON

FCT541/2541T

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

tPZH
tPZL

Output Enable Time 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

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

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

6.8 8

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

SWITCH POSITION

SET-UP, HOLD AND RELEASE TIMES

PULSE WIDTH

Test Switch

Disable Low

Enable Low

Closed

All Other Tests

Open

Open Drain

DEFINITIONS:

C

L= Load capacitance: includes jig and probe capacitance.

R

T = Termination resistance: should be equal to ZOUT of the Pulse

Generator.

2565 drw 10

2565 drw 14

2565 drw 11

2565 drw 12

2565 drw 13

Pulse

Generator

R

T

D.U.T.

V

CC

V

IN

C L

V

OUT

50pF

500Ω

500Ω

7.0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V

0V

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

tSU

tH

tREM

tSU

tH

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

tW

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V
0V

1.5V

V

OH

tPLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V
0V

tPLH tPHL

tPHL

VOL

CONTROL

INPUT

3V

1.5V
0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH
CLOSED

SWITCH
OPEN

VOL

0.3V

0.3V

t

PLZtPZL

tPZH tPHZ

3.5V

0V

1.5V

1.5V

ENABLE DISABLE

VOH

PRESET

CLEAR

CLOCK ENABLE

ETC.

PROPAGATION DELAY

ENABLE AND DISABLE TIMES

2565 drw 14

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable­HIGH

2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; t

F ≤ 2.5ns; tR ≤ 2.5ns

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

6.8 9

ORDERING INFORMATION

2565 drw 15

IDT XX

Temp. Range

XXXX

Device TypeXPackage

X

Process

Blank
B

P
D
SO
L
E
PY
Q

240T
244T
540T
541T
240AT
244AT
540AT
541AT
240CT
244CT
540CT
541CT
240DT
244DT

Commercial
MIL-STD-883, Class B

Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Shrink Small Outline Package
Quarter-size Small Outline Package

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

54
74

–55°C to +125°C
0°C to +70°C

FCT

X

Family

Blank2High Drive

Balanced Drive