Philips
Semiconductors
74F298
Quad 2-input multiplexer with storage
Product specification
IC15 Data Handbook
1989 Aug 14
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
2
1989 Aug 14
8530061 97377
FEATURES
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
16
15
14
13
12
11
10
7
6
5
4
3
2
1
I0d
V
CC
Qd
CP
S
Qc
Qa
Qb
I1b
I1a
I1d
I0a
I0b
I1c
9
8
GND
I0c
SF00859
TYPE
TYPICAL f
MAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F298
115MHz
30mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
10%,
T
amb
= 0
C to +70
C
PKG DWG #
16-pin plastic DIP
N74F298N
SOT38-4
16-pin plastic SO
N74F298D
SOT109-1
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
20
A/0.6mA
I1a, I1b, I1c, I1d
Data inputs
1.0/1.0
20
A/0.6mA
S
Select input
1.0/1.0
20
A/0.6mA
CP
Clock input (active falling edge)
1.0/1.0
20
A/0.6mA
Qa, Qb, Qc, Qd
Data outputs
50/33
1.0mA/20mA
NOTE:
One (1.0) FAST unit load is defined as: 20
A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
V
CC
= Pin 16
GND = Pin 8
SF00860
10
11
S
CP
3
2
4
1
9
5
7
I0a
I1a
I0b
I1b
I0c
I1c
I0d
Qa
Qb
Qc
Qd
15
14
13
12
6
I1d
LOGIC SYMBOL (IEEE/IEC)
SF00861
3
2, 1D
11
C1
10
M2
2
15
2, 1D
4
1
14
9
5
13
7
6
12
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
1989 Aug 14
3
LOGIC DIAGRAM
I1a
I0a
I1b
I0b
I1c
I0c
I1d
I0d
2
3
1
4
5
9
6
7
15
14
13
12
Qa
Qb
Qc
Qd
V
CC
= Pin 16
GND = Pin 8
SF00862
R
CP
S
Qa
R
CP
S
Qb
R
CP
S
Qc
R
CP
S
Qd
S
CP
10
11
FUNCTION TABLE
INPUTS
OUTPUT
OPERATING MODE
CP
S
I0n
I1n
Qn
OPERATING MODE
l
l
X
L
Load source "0"
l
h
X
H
Load source "0"
h
X
l
L
Load source "1"
h
X
h
H
Load source "1"
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
PARAMETER
RATING
UNIT
V
CC
Supply voltage
0.5 to +7.0
V
V
IN
Input voltage
0.5 to +7.0
V
I
IN
Input current
30 to +5
mA
V
OUT
Voltage applied to output in High output state
0.5 to V
CC
V
I
OUT
Current applied to output in Low output state
40
mA
T
amb
Operating free-air temperature range
0 to +70
C
T
stg
Storage temperature range
65 to +150
C
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
1989 Aug 14
4
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
NOM
MAX
UNIT
V
CC
Supply voltage
4.5
5.0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Low-level input voltage
0.8
V
I
IK
Input clamp current
18
mA
I
OH
High-level output current
1
mA
I
OL
Low-level output current
20
mA
T
amb
Operating free-air temperature range
0
70
C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
NO TAG
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
NO TAG
MIN
TYP
NO TAG
MAX
UNIT
V
O
High level output voltage
V
CC
= MIN, V
IL
= MAX,
10%V
CC
2.5
V
V
OH
High-level output voltage
CC
,
IL
,
V
IH
= MIN, I
OH
= MAX
5%V
CC
2.7
3.4
V
V
O
Low level output voltage
V
CC
= MIN, V
IL
= MAX,
10%V
CC
0.30
0.50
V
V
OL
Low-level output voltage
CC
,
IL
,
V
IH
= MIN, I
OL
= MAX
5%V
CC
0.30
0.50
V
V
IK
Input clamp voltage
V
CC
= MIN, I
I
= I
IK
0.73
1.2
V
I
I
Input current at maximum input voltage
V
CC
= MAX, V
I
= 7.0V
100
A
I
IH
High-level input current
V
CC
= MAX, V
I
= 2.7V
20
A
I
IL
Low-level input current
V
CC
= MAX, V
I
= 0.5V
0.6
mA
I
OS
Short-circuit output current
NO TAG
V
CC
= MAX
60
150
mA
I
CC
Supply current (total)
I
CCH
V
CC
= MAX
30
40
mA
I
CC
Supply current (total)
I
CCL
V
CC
= MAX
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
CC
= 5V, T
amb
= 25
C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal 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 parameter tests. In any
sequence of parameter tests, I
OS
tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST
CONDITION
T
amb
= +25
C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500
T
amb
= 0
C to +70
C
V
CC
= +5.0V
10%
C
L
= 50pF
R
L
= 500
UNIT
MIN
TYP
MAX
MIN
MAX
f
MAX
Maximum clock frequency
Waveform
NO TAG
110
115
105
ns
t
PLH
t
PHL
Propagation delay
CP tp Qn
Waveform
NO TAG
4.0
4.5
5.5
6.5
7.5
8.5
4.0
4.5
9.0
9.5
ns
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
1989 Aug 14
5
AC SETUP REQUIREMENTS
LIMITS
SYMBOL
PARAMETER
TEST
CONDITION
T
amb
= +25
C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500
T
amb
= 0
C to +70
C
V
CC
= +5.0V
10%
C
L
= 50pF
R
L
= 500
UNIT
MIN
TYP
MAX
MIN
MAX
t
s
(H)
t
s
(L)
Setup time, High or Low
I0n, I1n to CP
Waveform
NO TAG
2.0
2.0
2.0
2.0
ns
t
h
(H)
t
h
(L)
Hold time, High or Low
I0n, I1n to CP
Waveform
NO TAG
1.0
1.0
1.0
1.0
ns
t
s
(H)
t
s
(L)
Setup time, High or Low
S to CP
Waveform
NO TAG
6.0
5.0
7.0
6.0
ns
t
h
(H)
t
h
(L)
Hold time, High or Low
S to CP
Waveform
NO TAG
0
0
0
0
ns
t
w
(H)
t
w
(L)
CP Pulse width,
High or Low
Waveform
NO TAG
5.0
5.0
5.0
7.0
ns
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
V
M
V
M
1/f
MAX
t
W
(L)
CP
Q
n
t
W
(H)
V
M
V
M
SF00863
t
PLH
t
PHL
Waveform 1.
Clock Input to Output, Clock Pulse Width, and
Maximum Clock Frequency
V
M
V
M
V
M
V
M
t
h
(H)
t
h
(L)
Ion, I1n, S
CP
t
s
(L)
t
s
(H)
SF00864
V
M
V
M
Waveform 2.
Data Setup and Hold Times
TEST CIRCUIT AND WAVEFORMS
tw
90%
VM
10%
90%
VM
10%
90%
VM
10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
0V
tTHL (tf
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
t
THL
1MHz
500ns
2.5ns
2.5ns
Input Pulse Definition
VCC
family
74F
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN
VOUT
Test Circuit for Totem-Pole Outputs
DEFINITIONS:
R
L
= Load resistor;
see AC ELECTRICAL CHARACTERISTICS for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC ELECTRICAL CHARACTERISTICS for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
tTHL (tf
)
tTLH (tr
)
tTLH (tr
)
AMP (V)
amplitude
3.0V
1.5V
V
M
SF00006
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
1989 Aug 14
6
DIP16:
plastic dual in-line package; 16 leads (300 mil)
SOT38-4
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
1989 Aug 14
7
SO16:
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
Philips Semiconductors
Product specification
74F298
Quad 2-input multiplexer with storage
yyyy mmm dd
8
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 940883409
Telephone 800-234-7381
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:
9397-750-05116
Philips
Semiconductors
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
[1]
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.
Data sheet status
[1]
Please consult the most recently issued datasheet before initiating or completing a design.
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