Page 1
INTEGRATED CIRCUITS
74F521
8-bit identity comparator
Product specification
IC15 Data Handbook
1990 May 15
Page 2
Philips Semiconductors Product specification
74F5218-bit identity comparator
FEA TURES
PIN CONFIGURATION
•Compares two 8-bit words in 6.5ns typical
•Expandable to any word length
DESCRIPTION
The 74F521 is an expandable 8-bit comparator. It compares two
words of up to 8 bits each and provides a Low output when the two
words match bit for bit. The expansion input I
active-Low enable input.
TYPICAL
TYPE
PROPAGATION
DELA Y
74F521 7.0ns 24mA
ORDERING INFORMA TION
DESCRIPTION
20-pin plastic DIP N74F521N SOT146-1
20-pin plastic SOL N74F521D SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
A0 – A7 Word A inputs 1.0/1.0 20µA/0.6mA
B0 – B7 Word B inputs 1.0/1.0 20µA/0.6mA
I
A=B
Q
A=B
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
Expansion or Enable input (active Low) 1.0/1.0 20µA/0.6mA
Identity output (active Low) 50/33 1.0mA/20mA
also serves as an
A=B
TYPICAL
SUPPLY CURRENT
(TOTAL)
COMMERCIAL RANGE
VCC = 5V ±10%, T
= 0°C to +70°C
amb
I
GND
1
A=B
2
A0
3
B0
4
A1
5
B1
6
A2
7
B2
8
A3
9
B3
10 11
20
19
18
17
16
15
14
13
12
SF00273
PKG DWG #
V
CC
Q
A=B
B7
A7
B6
A6
B5
A5
B4
A4
LOGIC SYMBOL
1
I
A=B
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
VCC = Pin 20
GND = Pin 10
May 15, 1990 853–0372 99601
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
Q
A=B
19
SF00274
IEC/IEEE SYMBOL
2
2
4
6
8
11
13
15
17
3
5
7
9
12
14
15
18
1
0
3
0
7
EN
COMP
A
B
A=B
19
SF00275
Page 3
Philips Semiconductors Product specification
74F5218-bit identity comparator
LOGIC DIAGRAM
2
A0
3
B0
4
A1
5
B1
6
A2
7
B2
8
A3
9
B3
11
A4
12
B4
13
A5
14
B5
15
A6
16
B6
17
A7
18
B7
1
I
A=B
VCC = Pin 20
GND = Pin 10
19
Q
SF00276
A=B
FUNCTION TABLE
INPUTS OUTPUT
I
A=B
L A=B* L
L A≠B H
H A=B* H
H A≠B H
H = High voltage level
L = Low voltage level
X = Don’t care
* A0=B0, A1=B1, A2=B2, etc.
A, B Q
A=B
APPLICATIONS
ENABLE
LOW
ENABLE
LOW
A0 B0 A7 B7
I
A=B
Q
A=B
A0 B0 A7 B7
I
A=B
Q
A=B
A8 B8 A15 B15
I
A=B
Q
A=B
RIPPLE EXPANSION
A8 B8 A15 B15
I
A=B
Q
A=B
A16 B16 A23 B23
I
A=B
Q
A=B
A16 B16 A23 B23
I
A=B
Q
A=B
May 15, 1990
PARALLEL EXPANSION
3
SF00277
Page 4
Philips Semiconductors Product specification
SYMBOL
PARAMETER
UNIT
1
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
VOHHigh-level output voltage
V
VOLLow-level output voltage
V
ICCSupply current (total)
V
MAX
74F5218-bit identity comparator
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
V
I
IN
V
I
OUT
T
T
CC
IN
OUT
amb
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
RECOMMENDED OPERATING CONDITIONS
V
V
V
I
I
I
T
CC
IH
IL
IK
OH
OL
amb
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
PARAMETER RA TING UNIT
CC
V
LIMITS
MIN NOM MAX
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MIN TYP
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
3
I
CCH
I
CCL
VCC = MIN, VIL = MAX ±10%V
VIH = MIN, IOH = MAX ±5%V
CC
VCC = MIN, VIL = MAX ±10%V
VIH = MIN, IOL = MAX ±5%V
IK
CC
VCC = MAX –60 –150 mA
=
CC
CC
CC
2.5
2.7 3.4
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
= 5V, T
CC
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
2
MAX
0.30 0.50
0.30 0.50
–0.73 –1.2 V
24 36 mA
24 36 mA
May 15, 1990
4
Page 5
Philips Semiconductors Product specification
74F5218-bit identity comparator
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER
t
PLH
t
PHL
t
PLH
t
PHL
Propagation delay
An or Bn to Q
A=B
Propagation delay
I
to Q
A=B
A=B
AC WAVEFORMS
For all waveforms, VM = 1.5V.
TEST
CONDITION
Waveform 1, 2
Waveform 2
VCC = +5.0V
T
= +25°C
amb
C
= 50pF, RL = 500Ω
L
MIN TYP MAX MIN MAX
3.5
3.0
3.0
3.5
8.0
8.0
5.0
6.5
9.5
9.0
6.5
7.0
VCC = +5.0V ± 10%
T
= 0°C to +70°C
amb
C
= 50pF, RL = 500Ω
L
3.5
2.5
10.5
3.0
3.5
11.0
7.5
8.0
UNIT
ns
ns
An, Bn
Q
A=B
V
M
t
PHL
V
M
t
PLH
V
M
Waveform 1. For Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
V
CC
V
PULSE
GENERATOR
IN
R
T
Test Circuit for Totem-Pole Outputs
DEFINITIONS:
R
= Load resistor;
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.
D.U.T.
V
OUT
C
An, Bn
I
A=B
V
M
SF00278
Q
A=B
V
M
t
PLH
V
M
t
PHL
V
M
V
M
SF00279
Waveform 2. For Non-Inverting Outputs
t
NEGATIVE
PULSE
R
L
L
POSITIVE
PULSE
90%
10%
V
M
10%
t
THL (tf
t
TLH (tr
90%
V
M
w
V
M
10%
)
)
t
)
TLH (tr
t
)
THL (tf
90%
V
M
t
w
90%
10%
AMP (V)
0V
AMP (V)
0V
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
OUT
of
family
74F
May 15, 1990
SF00006
5
Page 6
Philips Semiconductors Product specification
74F5218-bit identity comparator
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
1990 May 15
6
Page 7
Philips Semiconductors Product specification
74F5218-bit identity comparator
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
1990 May 15
7
Page 8
Philips Semiconductors Product specification
74F5218-bit identity comparator
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]
[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 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: 9397-750-05129
yyyy mmm dd
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