Datasheet N74F298N, N74F298D Datasheet (Philips)

INTEGRATED CIRCUITS

74F298

Quad 2-input multiplexer with storage

Product specification
IC15 Data Handbook




1989 Aug 14

Philips Semiconductors Product specification

74F298Quad 2-input multiplexer with storage

FEA TURES

•Fully synchronous operation

•Select from two data sources

•Buffered, negative edge triggered clock

•Provides the equivalent of function capabilities of two separate

MSI functions (74F157 and 74F175)

DESCRIPTION

The 74F298 is a high speed Quad 2-Input Multiplexer with storage.
It selects 4 bits of data from two sources (ports) under the control of
a common Select input (S). The selected data is transferred to the
4-bit output register synchronous with the High-to-Low transition of
the clock (CP). The 4-bit register is fully edge triggered. The data
inputs (I0 and I1) and Select input (S) must be stable only one setup
time prior to the High-to-Low transition of the clock for predictable
operation.

PIN CONFIGURATION

I1b

1

I1a

2

I0a

3

I0b

4

I1c

5

I1d

6

I0d

TYPE TYPICAL f

MAX

74F298 115MHz 30mA

16

V

CC

Qa

15

Qb

14

Qc

13

Qd

12

CP

11

S

107

98GND I0c

SF00859

TYPICAL

SUPPLY CURRENT

(TOTAL)

ORDERING INFORMATION

ORDER CODE

DESCRIPTION

16-pin plastic DIP N74F298N SOT38-4

16-pin plastic SO N74F298D SOT109-1

COMMERCIAL RANGE

VCC = 5V ±10%,

T

= 0°C to +70°C

amb

PKG DWG #

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW

I0a, I0b, I0c, I0d Data inputs 1.0/1.0 20µA/0.6mA
I1a, I1b, I1c, I1d Data inputs 1.0/1.0 20µA/0.6mA

S Select input 1.0/1.0 20µA/0.6mA

CP Clock input (active falling edge) 1.0/1.0 20µA/0.6mA

Qa, Qb, Qc, Qd Data outputs 50/33 1.0mA/20mA

NOTE:

One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.

LOGIC SYMBOL

10
11

VCC = Pin 16
GND = Pin 8

S
CP

3241957

I0a I1a I0b I1b I0c I1c I0d

Qa Qb Qc Qd

15 14 13 12

SF00860

6

I1d

LOGIC SYMBOL (IEEE/IEC)

11
10

3
2

4
1

9
5

7
6

C1

M2

2

, 1D

2, 1D

SF00861

15

14

13

12

1989 Aug 14 853–0061 97377

2

Philips Semiconductors Product specification

OPERATING MODE

Load source “0”

Load source “1”

74F298Quad 2-input multiplexer with storage

LOGIC DIAGRAM

I1a I0a I1b I0b I1c I0c I1d I0d

23 14 59 67

10

S

11

CP

= Pin 16

V

CC

GND = Pin 8

R
CP

SQa

Qa Qb Qc Qd

15 14 13 12

R
CP

SQb

FUNCTION TABLE

INPUTS OUTPUT

CP S I0n I1n Qn

↓ l l X L
↓ l h X H
↓ h X l L
↓ h X h H

“

”

“

”

H = High voltage level
h = High voltage level one setup time prior to the High-to-Low

clock transition
L = Low voltage level
l = Low voltage level one setup time prior to the High-to-Low

clock transition
X = Don’t care
↓ = High-to-Low clock transition

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL

V

CC

V

IN

I

IN

V

OUT

I

OUT

T

amb

T

stg

Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA
Voltage applied to output in High output state –0.5 to V
Current applied to output in Low output state 40 mA
Operating free-air temperature range 0 to +70 °C
Storage temperature range –65 to +150 °C

PARAMETER RATING UNIT

R
CP

SQc

R
CP

SQd

SF00862

CC

V

1989 Aug 14

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

NO TAG

VOHHigh-level output voltage

CC

,

IL

,

VOLLow-level output voltage

CC

,

IL

,

ICCSupply current (total)

V

MAX

74F298Quad 2-input multiplexer with storage

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN NOM MAX

V

CC

V

IH

V

IL

I

IK

I

OH

I

OL

T

amb

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

SYMBOL PARAMETER TEST CONDITIONS

Supply voltage 4.5 5.0 5.5 V
High-level input voltage 2.0 V
Low-level input voltage 0.8 V
Input clamp current –18 mA
High-level output current –1 mA
Low-level output current 20 mA
Operating free-air temperature range 0 70 °C

LIMITS

MIN

TYP

NO TAG

MAX

UNIT

p

p

V

IK

I

I

I

IH

I

IL

I

OS

Input clamp voltage VCC = MIN, II = I
Input current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA
High-level input current VCC = MAX, VI = 2.7V 20 µA
Low-level input current VCC = MAX, VI = 0.5V –0.6 mA
Short-circuit output current

pp

NO TAG

I

CCH

I

CCL

VCC = MIN, VIL = MAX,
VIH = MIN, IOH = –MAX

VCC = MIN, VIL = MAX,
VIH = MIN, I

OL

=– MAX

IK

VCC = MAX –60 –150 mA

=

CC

±10%V

±5%V

±10%V

±5%V

2.5 V

CC

2.7 3.4 V

CC

CC

CC

0.30 0.50 V

0.30 0.50 V

–0.73 –1.2 V

30 40 mA
32 40 mA

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2. All typical values are at V

3. Not more than one output should be shorted at a time. For testing I

CC

= 5V, T

techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting

amb

= 25°C.

, the use of high-speed test apparatus and/or sample-and-hold

OS

of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I

tests should be performed last.

OS

AC ELECTRICAL CHARACTERISTICS

LIMITS

T

SYMBOL PARAMETER

f

MAX

t

PLH

t

PHL

Maximum clock frequency
Propagation delay

CP tp Qn

TEST

CONDITION

Waveform

NO TAG

Waveform

NO TAG

= +25°C

amb

VCC = +5.0V

C

= 50pF

L

R

= 500Ω

L

MIN TYP MAX MIN MAX

110 115 105 ns

4.0

4.5

5.5

6.5

7.5

8.5

T

= 0°C to +70°C

amb

VCC = +5.0V ± 10%

C

= 50pF

L

R

= 500Ω

L

4.0

4.5

9.0

9.5

UNIT

ns

1989 Aug 14

4

Philips Semiconductors Product specification

74F298Quad 2-input multiplexer with storage

AC SETUP REQUIREMENTS

LIMITS

T

SYMBOL PARAMETER

ts(H)
ts(L)

th(H)
th(L)

ts(H)
ts(L)

th(H)
th(L)

tw(H)
tw(L)

Setup time, High or Low
I0n, I1n to CP

Hold time, High or Low
I0n, I1n to CP

Setup time, High or Low
S to CP

Hold time, High or Low
S to CP

CP Pulse width,
High or Low

TEST

CONDITION

Waveform

NO TAG

Waveform

NO TAG

Waveform

NO TAG

Waveform

NO TAG

Waveform

NO TAG

= +25°C

amb

VCC = +5.0V

C

= 50pF

L

R

= 500Ω

L

MIN TYP MAX MIN MAX

2.0

2.0

1.0

1.0

6.0

5.0
0

0

5.0

5.0

T

= 0°C to +70°C

amb

VCC = +5.0V ± 10%

C

= 50pF

L

R

= 500Ω

L

2.0

2.0

1.0

1.0

7.0

6.0
0

0

5.0

7.0

UNIT

ns

ns

ns

ns

ns

AC WAVEFORMS

For all waveforms, VM = 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.

1/f

MAX

CP

V

M

tW(L)

t

PLH

Q

n

tW(H)

V

M

V

M

t

PHL

V

M

SF00863

Waveform 1. Clock Input to Output, Clock Pulse Width, and

Ion, I1n, S

CP

V

M

V

M

Waveform 2. Data Setup and Hold Times

Maximum Clock Frequency

TEST CIRCUIT AND WAVEFORMS

V

CC

V

PULSE

GENERATOR

IN

D.U.T.

R

T

Test Circuit for Totem-Pole Outputs

V

OUT

NEGATIVE
PULSE

R

C

L

L

POSITIVE
PULSE

90%

10%

V

M

10%

)

t

THL (tf

)

t

TLH (tr

90%

V

M

V

M

th(H) th(L)

t

w

10%

)

t

TLH (tr

t

)

THL (tf

90%

t

w

V

M

ts(L)ts(H)

90%

V

M

V

M

10%

V

M

V

M

AMP (V)

0V

0V

SF00864

AMP (V)

DEFINITIONS:

= Load resistor;

R

L

see AC ELECTRICAL CHARACTERISTICS for value.

C

= Load capacitance includes jig and probe capacitance;

L

see AC ELECTRICAL CHARACTERISTICS for value.

R

= Termination resistance should be equal to Z

T

pulse generators.

1989 Aug 14

OUT

of

family

74F

5

Input Pulse Definition

INPUT PULSE REQUIREMENTS

V

amplitude

3.0V 1.5V

rep. rate

M

1MHz 500ns

t

w

t

TLHtTHL

2.5ns 2.5ns

SF00006

Philips Semiconductors Product specification

Quad 2-input multiplexer with storage

DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4

74F298

1989 Aug 14

6

Philips Semiconductors Product specification

Quad 2-input multiplexer with storage

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

74F298

1989 Aug 14

7

Philips Semiconductors Product specification

Quad 2-input multiplexer with storage

Data sheet status

Data sheet
status

Objective
specification

Preliminary
specification

Product
specification

Product
status

Development

Qualification

Production

Definition

This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.

This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.

[1]

74F298

[1] Please consult the most recently issued datasheet before initiating or completing a design.

Definitions

Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one

or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can

reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

 Copyright Philips Electronics North America Corporation 1998

All rights reserved. Printed in U.S.A.

print code Date of release: 10-98
Document order number: 9397-750-051 16




yyyy mmm dd

8