Integrated Device Technology Inc IDT54157ATSOB, IDT54157CTD, IDT54157CTDB, IDT54157CTE, IDT54157CTEB Datasheet

Integrated Device Technology, Inc.

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.

FAST CMOS
QUAD 2-INPUT
MULTIPLEXER

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

IDT54/74FCT2257T/AT/CT

MILITARY AND COMMERCIAL TEMPERATURE RANGES JUNE 1996

1

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

The IDT logo is a registered trademark of 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

OH, 12mA IOL Com.)

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

– Reduced system switching noise

E

157 Only

3 other multiplexers

OE257 Only

Z

A

Z B–Z D

S

I

1B–I1D

I0B–I

0D

I

1A

I

0A

2537 drw 01

2537 drw 02

2537 drw 03

FUNCTIONAL BLOCK DIAGRAM

PIN CONFIGURATIONS

LCC

TOP VIEW

4
5
6
7
8

L20-2

18
17
16
15
14

9

10 11 12 13

32

1

20 19

INDEX

GND

NC

Vcc

E or OE*

NC

NC NC

S

I

0A

I

1A

ZA
I0B

I1B

ZB

ZDI

1D

I0C
I

1C

ZC
I

0D

DIP/SOIC/QSOP/CERPACK

TOP VIEW

5
6
7
8

S

I

0A

1
2
3
4

16
15
14
13
12
11
10

9

Vcc

P16-1,
D16-1,

SO16-1,

SO16-7

&

E16-1

I

1A

Z

A

I

0B

I

1B

GND

Z

E or OE*

I

0C

I

1C

Z

C

I

0D

I
Z

D

B

1D

* E for FCT157, OE for FCT257/FCT2257.

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

PIN DESCRIPTION

Pin Names Description

I

0A–I0D Source 0 Data Inputs

I

1A–I1D Source 1 Data Inputs

E

Enable Input (Active LOW)–FCT157T

OE

Output Enable (Active LOW)–FCT257T/2257T
S Select Input
Z

A–ZD Outputs

2537 tbl 01

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

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

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.

Symbol Parameter

(1)

Conditions Typ. Max. Unit

C

IN

Input
Capacitance

VIN = 0V 6 10

pF

C

OUT

Output
Capacitance

V

OUT

= 0V 8 12

pF

NOTE:

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

2537 lnk 03

2537 lnk 04

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

6.6 3

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

V

OH

Output HIGH Voltage VCC = Min.

V

IN

= V

IH

or V

IL

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

V

OL

Output LOW Voltage VCC = Min.

V

IN

= V

IH

or V

IL

I

OL

= 32mA MIL.

I

OL

= 48mA COM'L.

— 0.3 0.50 V

I

OS

Short Circuit Current VCC = Max., VO = GND

(3)

–60 –120 –225 mA

I

OFF

Input/Output Power Off Leakage

(5)

VCC = 0V, VIN or VO ≤ 4.5V — —

±

1

µ

A

OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T

2537 tbl 06

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

I

ODL

Output LOW Current VCC = 5V, V

IN

= V

IH or VIL, VOUT

= 1.5V

(3)

16 48 — mA

I

ODH

Output HIGH Current VCC = 5V, V

IN

= V

IH

or V

IL,VOUT

= 1.5V

(3)

–16 –48 — mA

V

OH

Output HIGH Voltage VCC = Min.

V

IN

= V

IH

or V

IL

IOH = –12mA MIL.
I

OH

= –15mA COM'L.

2.4 3.3 — V

V

OL

Output LOW Voltage VCC = Min.

V

IN

= V

IH

or V

IL

IOL = 12mA — 0.3 0.50 V

OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T

2537 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.

5. This parameter is guaranteed but not tested.

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

V

IH

Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V

V

IL

Input LOW Level Guaranteed Logic LOW Level — — 0.8 V

I

I H

Input HIGH Current

(4)

VCC = Max. VI = 2.7V — —

±

1

µ

A

I

I L

Input LOW Current

(4)

VI = 0.5V — —

±

1

I

OZH

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

±

1

µ

A

I

OZL

(3-State Output pins)

(4)

VO = 0.5V — —

±

1

II Input HIGH Current

(4)

VCC = Max., VI = V

CC

(Max.) — —

±

1

µ

A

V

IK

Clamp Diode Voltage VCC = Min., I

IN

= –18mA — –0.7 –1.2 V

V

H

Input Hysteresis

—

— 200 — mV

I

CC

Quiescent Power Supply Current VCC = Max., VIN = GND or V

CC

— 0.01 1 mA

2537 lnk 05