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INTEGRATED CIRCUITS
74F521 8-bit identity comparator
Product specification IC15 Data Handbook 1990 May 15
Philips Semiconductors
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
FEATURES
* 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 IA=B also serves as an active-Low enable input. TYPICAL PROPAGATION DELAY 7.0ns TYPICAL SUPPLY CURRENT (TOTAL) 24mA
PIN CONFIGURATION
IA=B 1 A0 B0 A1 B1 A2 B2 A3 B3 2 3 4 5 6 7 8 9 20 VCC 19 QA=B 18 B7 17 A7 16 B6 15 A6 14 B5 13 A5 12 B4 11 A4
TYPE 74F521
GND 10
SF00273
ORDERING INFORMATION
DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F521N N74F521D PKG DWG # SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0 - A7 B0 - B7 IA=B QA=B Word A inputs Word B inputs Expansion or Enable input (active Low) Identity output (active Low) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 50/33 LOAD VALUE HIGH/LOW 20A/0.6mA 20A/0.6mA 20A/0.6mA 1.0mA/20mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
1
IEC/IEEE SYMBOL
2 IA=B 4 6 8 11 13 15 17 QA=B 19 3 5 7 9 12 14 15 18 1 7 EN B 3 A=B 0 19 A COMP
0
2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 VCC = Pin 20 GND = Pin 10
A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7
SF00274
SF00275
May 15, 1990
2
853-0372 99601
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
LOGIC DIAGRAM
A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 IA=B 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 1 QA=B
FUNCTION TABLE
INPUTS IA=B L L H H H = High voltage level L = Low voltage level X = Don't care * A0=B0, A1=B1, A2=B2, etc. A, B A=B* AB A=B* AB OUTPUT QA=B L H H H
VCC = Pin 20 GND = Pin 10
SF00276
APPLICATIONS
A0 B0 A7 B7 A8 B8 A15 B15 A16 B16 A23 B23
ENABLE LOW
IA=B QA=B
IA=B QA=B
IA=B QA=B
RIPPLE EXPANSION
A0 B0 A7 B7 A8 B8 A15 B15 A16 B16 A23 B23
ENABLE LOW
IA=B QA=B
IA=B QA=B
IA=B QA=B
PARALLEL EXPANSION
SF00277
May 15, 1990
3
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Operating free-air temperature range Storage temperature range PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 40 0 to +70 -65 to +150 UNIT V V mA V mA C C
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK IOH IOL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature range 0 PARAMETER MIN 4.5 2.0 0.8 -18 -1 20 +70 NOM 5.0 MAX 5.5 V V V mA mA mA C UNIT
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 VCC = MIN, VIL = MAX VIH = MIN, IOH = MAX Low-level Low level output voltage Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Short-circuit output current3 Supply current (total) ICCH ICCL VCC = MIN, VIL = MAX VIH = MIN, IOL = MAX VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX VCC = MAX -60 24 24 10%VCC 5%VCC 10%VCC 5%VCC LIMITS MIN 2.5 V 2.7 3.4 0.30 0.30 -0.73 0.50 V 0.50 -1.2 100 20 -0.6 -150 36 36 V A A mA mA mA mA TYP2 MAX UNIT
VO OH
High-level High level output voltage
VO OL VIK II IIH IIL IOS ICC
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 VCC = 5V, Tamb = 25C. 3. Not more than one output should be shorted at a time. For testing IOS, 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, IOS tests should be performed last.
May 15, 1990
4
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5.0V Tamb = +25C CL = 50pF, RL = 500 MIN tPLH tPHL tPLH tPHL Propagation delay An or Bn to QA=B Propagation delay IA=B to QA=B Waveform 1, 2 Waveform 2 3.5 3.0 3.0 3.5 TYP 8.0 8.0 5.0 6.5 MAX 9.5 9.0 6.5 7.0 VCC = +5.0V 10% Tamb = 0C to +70C CL = 50pF, RL = 500 MIN 3.5 2.5 3.0 3.5 MAX 11.0 10.5 7.5 8.0 ns ns UNIT
AC WAVEFORMS
For all waveforms, VM = 1.5V.
An, Bn
VM tPHL
An, Bn VM IA=B tPLH
VM tPLH
VM tPHL
QA=B
VM
VM
QA=B
VM
VM
SF00278
SF00279
Waveform 1.
For Inverting Outputs
Waveform 2.
For Non-Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
VCC NEGATIVE PULSE VIN PULSE GENERATOR RT D.U.T. VOUT 90% VM 10% tTHL (tf ) CL RL tw VM 10% tTLH (tr ) 0V 90% AMP (V)
tTLH (tr ) 90% POSITIVE PULSE VM 10% tw
tTHL (tf ) AMP (V) 90% VM 10% 0V
Test Circuit for Totem-Pole Outputs DEFINITIONS: RL = Load resistor; see AC ELECTRICAL CHARACTERISTICS for value. CL = Load capacitance includes jig and probe capacitance; see AC ELECTRICAL CHARACTERISTICS for value. RT = Termination resistance should be equal to ZOUT of pulse generators.
Input Pulse Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00006
May 15, 1990
5
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1990 May 15
6
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1990 May 15
7
Philips Semiconductors
Product specification
8-bit identity comparator
74F521
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification 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.
Production
[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 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 10-98 9397-750-05129
Philips Semiconductors
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