Datasheet IDT54FCT157T, IDT54FCT157AT, IDT54FCT157CT, IDT54FCT157DT, IDT54FCT257T Datasheet (IDT)

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FAST CMOS
QUAD 2-INPUT
MULTIPLEXER

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.)

– 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 FCT157T/257T:

– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 48mA IOL)

• Features for FCT2257T:

– Std., A, and C speed grades
– Resistor outputs (-15mA I

(-12mA IOH, 12mA IOL Mil.)

– Reduced system switching noise

OH, 12mA IOL Com.)

IDT54/74FCT157T/AT/CT/DT
IDT54/74FCT257T/AT/CT/DT

IDT54/74FCT2257T/AT/CT

DESCRIPTION:

The FCT157T, FCT257T/FCT2257T are high-speed quad
2-input multiplexers built using an advanced dual metal CMOS
technology. Four bits of data from two sources can be
selected using the common select input. The four buffered
outputs present the selected data in the true (non-inverting)
form.

The FCT157T has a common, active-LOW, enable input.
When the enable input is not active, all four outputs are held
LOW. A common application of ‘FCT157T is to move data
from two different groups of registers to a common bus.
Another application is as a function generator. The ‘FCT157T
can generate any four of the 16 different functions of two
variables with one variable common.

The FCT257T/FCT2257T have a common Output Enable
(OE) input. When OE is HIGH, all outputs are switched to a

high-impedance state allowing the outputs to interface directly
with bus-oriented systems.

The FCT2257T has 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.

FUNCTIONAL BLOCK DIAGRAM

S

157 Only

1B–I1D

I

I0B–I

E

3 other multiplexers

0D

1A

I

0A

I

OE257 Only

Z B–Z D

A

Z

2537 drw 01

PIN CONFIGURATIONS

1

S
I
I

GND

2

0A
1A

Z

A

I

0B

I

1B

B

Z

3
4
5
6
7
8

P16-1,
D16-1,

SO16-1,

SO16-7

E16-1

DIP/SOIC/QSOP/CERPACK

TOP VIEW

INDEX

1A

I

ZA

NC NC

I0B
I1B

0A

I

32

4
5
6
7
8

10 11 12 13

9

ZB

LCC

&

NC

S

1

L20-2

NC

GND

Vcc

20 19

ZDI

16
15
14
13
12
11
10

9

E or OE*

18
17
16
15
14

1D

Vcc

E or OE*

I

0C

I

1C

Z

C

I

0D

I

1D

D

Z

I0C
I

1C

ZC
I

0D

2537 drw 02

2537 drw 03

TOP VIEW

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

* E for FCT157, OE for FCT257/FCT2257.

MILITARY AND COMMERCIAL TEMPERATURE RANGES JUNE 1996

1996 Integrated Device Technology, Inc. 6.6 2537/6

1

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION

Pin Names Description

0A–I0D Source 0 Data Inputs

I

1A–I1D Source 1 Data Inputs

I

E
OE

S Select Input

A–ZD Outputs

Z

ABSOLUTE MAXIMUM RATINGS

Symbol Rating Commercial Military Unit

(2)

VTERM

(3)

VTERM

TA Operating

TBIAS Temperature

TSTG Storage

PT Power Dissipation 0.5 0.5 W
IOUT DC Output

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

3. Outputs and I/O terminals only.

Enable Input (Active LOW)–FCT157T
Output Enable (Active LOW)–FCT257T/2257T

(1)

Terminal Voltage

–0.5 to +7.0 –0.5 to +7.0 V
with Respect to
GND

Terminal Voltage
with Respect to
GND

–0.5 to

CC +0.5

V

–0.5 to

VCC +0.5

0 to +70 –55 to +125 °C

Temperature

–55 to +125 –65 to +135 °C
Under Bias

–55 to +125 –65 to +150 °C
Temperature

–60 to +120 –60 to +120 mA
Current

CC terminals only.

2537 tbl 01

V

2537 lnk 03

FUNCTION TABLE

(1)

Inputs Output ZN

EE/

OE

OE

SI0 I1 157 257

HXXX L Z

LHXL L L
LHXH H H
LLLX L L
LLHX H H

NOTE: 2537 tbl 02

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

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol Parameter

C

IN

Input
Capacitance

C

OUT

Output
Capacitance

NOTE:

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

(1)

Conditions Typ. Max. Unit

VIN = 0V 6 10

V

OUT

= 0V 8 12

pF

pF

2537 lnk 04

6.6 2

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER 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 Test Conditions

V

IH

V

IL

I

I H

I

I L

I

OZH

I

OZL

II Input HIGH Current
V

IK

V

H

I

CC

Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
Input HIGH Current
Input LOW Current

(4)

(4)

VI = 0.5V — —

VCC = Max. VI = 2.7V — —

High Impedance Output Current VCC = Max. VO = 2.7V — —

(4)

(4)

VCC = Max., VI = V

—

CC

(Max.) — —

IN

= –18mA — –0.7 –1.2 V

(3-State Output pins)

Clamp Diode Voltage VCC = Min., I
Input Hysteresis
Quiescent Power Supply Current VCC = Max., VIN = GND or V

OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T

Symbol Parameter Test Conditions

V

V

I

OS

I

OFF

OH

OL

Output HIGH Voltage VCC = Min.

IN

= V

IH

or V

V

IL

Output LOW Voltage VCC = Min.

IN

= V

IH

or V

V

IL

Short Circuit Current VCC = Max., VO = GND
Input/Output Power Off Leakage

(5)

VCC = 0V, VIN or VO ≤ 4.5V — —

(3)

(1)

Min. Typ.

VO = 0.5V — —

— 200 — mV

CC

(1)

IOH = –6mA MIL.

OH

= –8mA COM'L.

I
IOH = –12mA MIL.

OH

= –15mA COM'L.

I
I

OL

= 32mA MIL.

OL

= 48mA COM'L.

I

— 0.01 1 mA

Min. Typ.

2.4 3.3 — V

2.0 3.0 — V

— 0.3 0.50 V

–60 –120 –225 mA

(2)

Max. Unit

±
±
±
±
±

(2)

Max. Unit

±

1
1
1
1
1

1

µ

A

µ

A

µ

A

2537 lnk 05

µ

A

2537 tbl 06

OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T

Symbol Parameter Test Conditions

I

ODL

I

ODH

V

OH

V

OL

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

5. This parameter is guaranteed but not tested.

Output LOW Current VCC = 5V, V
Output HIGH Current VCC = 5V, V
Output HIGH Voltage VCC = Min.

IN

= V

IH

V

or V

Output LOW Voltage VCC = Min.

IN

= V

IH

V

A = –55°C.

or V

IN

= V

IH or VIL, VOUT

IN

= V

IH

IL

IL

or V

IL,VOUT

(1)

(3)

= 1.5V

(3)

= 1.5V

IOH = –12mA MIL.

OH

= –15mA COM'L.

I

Min. Typ.

16 48 — mA

–16 –48 — mA

2.4 3.3 — V

IOL = 12mA — 0.3 0.50 V

(2)

Max. Unit

2537 lnk 07

6.6 3

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS

IN = VCC

(1)

Min. Typ.

— 0.5 2.0 mA

FCTxxxT — 0.15 0.25 mA/

FCT2xxxT — 0.06 0.12

Symbol Parameter Test Conditions

∆ICC Quiescent Power Supply Current

TTL Inputs HIGH

ICCD Dynamic Power Supply Current

VCC = Max.
V

(4)

VCC = Max.
Outputs Open

E

(3)

IN = 3.4

or OE = GND

V
VIN = GND

One Bit Toggling
50% Duty Cycle

IC Total Power Supply Current

(6)

VCC = Max. VIN = VCC FCTxxxT — 1.5 3.5 mA
Outputs Open VIN = GND FCT2xxxT — 0.6 2.2

fO = 10MHz
50% Duty Cycle VIN = 3.4 FCTxxxT — 1.8 4.5

E

or OE = GND
One Bit Toggling VIN = GND FCT2xxxT 0.9 3.2
VCC = Max. VIN = VCC FCTxxxT — 1.5 3.5
Outputs Open VIN = GND FCT2xxxT 0.6 2.2

fO = 2.5MHz
50% Duty Cycle VIN = 3.4 FCTxxxT 2.5 7.5

E

or OE = GND
Four Bits Toggling VIN = GND FCT2xxxT 1.6 6.2

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

3. Per TTL driven input (V

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

C = IQUIESCENT + IINPUTS + IDYNAMIC

6. I
IC = ICC + ∆ICC DHNT + ICCD (foNo)

CC = Quiescent Current

I
∆I

CC = Power Supply Current for a TTL High Input (VIN = 3.4V)

H = Duty Cycle for TTL Inputs High

D

T = Number of TTL Inputs at DH

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

o = Output Frequency

o = Number of Outputs at fo

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

CC = 5.0V, +25°C ambient.

IN = 3.4V); all other inputs at VCC or GND.

CC formula. These limits are guaranteed but not tested.

(2)

Max. Unit

MHz

(5)
(5)

(5)

(5)

2537 tbl 06

6.6 4

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE - FCT157T

FCT157T FCT157AT

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

Symbol Parameter Condition

t

PLH

Propagation Delay IN to Z

t

PHL

t

PLH

Propagation Delay E to Z

t

PHL

t

PLH

Propagation Delay S to Z

t

PHL

Symbol Parameter Condition

t

PLH

Propagation Delay IN to Z

t

PHL

t

PLH

Propagation Delay E to Z

t

PHL

t

PLH

Propagation Delay S to Z

t

PHL

N

N

N

N

N

N

CL = 50pF

L

= 500

R

CL = 50pF

L

= 500

R

(1)

Ω

(1)

Ω

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 6.0 1.5 7.0 1.5 5.0 1.5 5.8 ns

1.5 10.5 1.5 12.0 1.5 6.0 1.5 7.4 ns

1.5 10.5 1.5 12.0 1.5 7.0 1.5 8.1 ns

2537 tbl 07

FCT157CT FCT157DT

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

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 4.3 1.5 5.0 1.5 3.9 — — ns

1.5 4.8 1.5 5.9 1.5 4.4 — — ns

1.5 5.2 1.5 6.0 1.5 4.6 — — ns

2537 tbl 08

SWITCHING CHARACTERISTICS OVER OPERATING RANGE – FCT257/2257T

FCT257/2257T FCT257/2257AT

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

Symbol Parameter Condition

tPLH

Propagation Delay IN to ZN CL = 50pF
tPHL
tPLH

Propagation Delay S to ZN 1.5 10.5 1.5 12.0 1.5 7.0 1.5 8.1 ns

R

(1)

L = 500Ω

tPHL
tPZH

Output Enable Time 1.5 8.5 1.5 10.0 1.5 7.0 1.5 8.0 ns
tPZL
tPHZ

Output Disable Time 1.5 6.0 1.5 8.0 1.5 5.5 1.5 5.8 ns
tPLZ

Symbol Parameter Condition

tPLH

Propagation Delay IN to ZN CL = 50pF
tPHL
tPLH

Propagation Delay S to ZN 1.5 5.2 1.5 6.0 1.5 4.4 — — ns

R

(1)

L = 500Ω

tPHL
tPZH

Output Enable Time 1.5 6.0 1.5 6.8 1.5 4.4 — — ns
tPZL
tPHZ

Output Disable Time 1.5 5.0 1.5 5.3 1.5 4.4 — — ns
tPLZ

NOTES: 2537 tbl 10

1. See test circuits and waveforms.

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

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 6.0 1.5 7.0 1.5 5.0 1.5 5.8 ns

2537 tbl 09

FCT257/2257CT FCT257DT

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

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 4.3 1.5 5.0 1.5 3.9 — — ns

6.6 5

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER MILITARY AND COMMERCIAL TEMPERATURE RANGES

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

V

CC

7.0V

SWITCH POSITION

Test Switch

Open Drain
Disable Low

Enable Low

All Other Tests

Generator.

Pulse

Generator

500

Ω

V

V

IN

OUT

D.U.T.

50pF

500

T

R

C

L

Ω

2537 drw 04

DEFINITIONS:

L= Load capacitance: includes jig and probe capacitance.

C

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

R

SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

PRESET

CLEAR

CLOCK ENABLE

ETC.

t

t

REM

H

t

H

t

SU

t

SU

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V

0V

3V

1.5V
0V

2537 drw 05

LOW-HIGH-LOW

PULSE

HIGH-LOW-HIGH

PULSE

Closed

Open

2537 lnk 11

1.5V

t

W

1.5V

2537 drw 06

SAME PHASE

INPUT TRANSITION

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

t

PLH

t

PLH

t

t

PHL

PHL

3V

1.5V
0V

V

OH

1.5V

V

OL

3V

1.5V
0V

2537 drw 07

ENABLE AND DISABLE TIMESPROPAGATION DELAY

ENABLE DISABLE

3V

CONTROL

INPUT

t

PHZ

PLZ

t

F ≤ 2.5ns; tR ≤ 2.5ns

t

PZL

OUTPUT

NORMALLY

OUTPUT

NORMALLY

NOTES:

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

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

LOW

HIGH

SWITCH
CLOSED

t

PZH

SWITCH
OPEN

3.5V

1.5V

1.5V
0V

0.3V

0.3V

1.5V
0V

3.5V

V

OL

V

OH

0V

2537 drw 08

6.6 6

IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER MILITARY AND COMMERCIAL TEMPERATURE RANGES

ORDERING INFORMATION

IDT

Temperature

Range

XX

FCT

X

Family

XXXX

Device

Type

X

PackageXProcess

Blank
B

P
D
SO
L
E
Q

157T
257T
157AT
257AT
157CT
257CT
157DT
257DT

Blank
2

54
74

Commercial
MIL-STD-883, Class B

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

Quad 2-Input Multiplexer
Quad 2-Input Multiplexer (3-state)

High Drive
Balanced Drive

–55°C to +125°C
0

°C to +70°C

2537 drw 09

6.6 7