INTEGRATED CIRCUITS 74F521 8-bit identity comparator Product specification IC15 Data Handbook 1990 May 15 Philips Semiconductors Product specification 8-bit identity comparator 74F521 FEATURES 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 IA=B also serves as an active-Low enable input. TYPICAL PROPAGATION DELAY TYPE 20 VCC IA=B 1 TYPICAL SUPPLY CURRENT (TOTAL) A0 2 19 QA=B B0 3 18 B7 A1 4 17 A7 B1 5 16 B6 A2 6 15 A6 B2 7 14 B5 A3 8 13 A5 B3 9 12 B4 GND 10 74F521 7.0ns 11 A4 24mA SF00273 ORDERING INFORMATION DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C PKG DWG # 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 IA=B Expansion or Enable input (active Low) 1.0/1.0 20µA/0.6mA QA=B Identity output (active Low) 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 IEC/IEEE SYMBOL 1 2 May 15, 1990 COMP 4 IA=B VCC = Pin 20 GND = Pin 10 0 2 A0 6 3 B0 8 4 A1 11 5 B1 6 A2 7 B2 8 A3 9 B3 A 13 15 17 QA=B 3 19 11 A4 5 12 B4 7 13 A5 9 14 B5 12 15 A6 14 16 B6 17 A7 18 B7 3 A=B 19 0 B 15 18 1 SF00274 7 EN SF00275 2 853–0372 99601 Philips Semiconductors Product specification 8-bit identity comparator 74F521 LOGIC DIAGRAM FUNCTION TABLE INPUTS A0 2 B0 3 A1 4 B1 5 A2 6 B2 7 A3 8 B3 9 A4 11 B4 12 A5 13 B5 14 A6 15 B6 16 A7 17 B7 18 IA=B 1 19 VCC = Pin 20 GND = Pin 10 OUTPUT IA=B A, B QA=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. QA=B SF00276 APPLICATIONS A0 ENABLE LOW B0 A7 B7 IA=B A8 B8 A15 B15 IA=B A16 B16 A23 B23 A23 B23 IA=B QA=B QA=B QA=B RIPPLE EXPANSION A0 ENABLE LOW B0 A7 IA=B B7 A8 B8 A15 IA=B A16 B16 IA=B QA=B QA=B PARALLEL EXPANSION May 15, 1990 B15 3 QA=B SF00277 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 PARAMETER RATING UNIT VCC Supply voltage –0.5 to +7.0 V VIN Input voltage –0.5 to +7.0 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in High output state –0.5 to VCC V IOUT Current applied to output in Low output state Tamb Operating free-air temperature range Tstg Storage temperature range 40 mA 0 to +70 °C –65 to +150 °C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER UNIT MIN NOM MAX 5.0 5.5 VCC Supply voltage 4.5 V VIH High-level input voltage 2.0 VIL Low-level input voltage 0.8 V IIK Input clamp current –18 mA IOH High-level output current –1 mA IOL Low-level output current 20 mA Tamb Operating free-air temperature range +70 °C V 0 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL TEST CONDITIONS1 PARAMETER LIMITS MIN TYP2 MAX UNIT VCC = MIN, VIL = MAX ±10%VCC 2.5 VIH = MIN, IOH = MAX ±5%VCC 2.7 VCC = MIN, VIL = MAX ±10%VCC 0.30 0.50 VIH = MIN, IOL = MAX ±5%VCC 0.30 0.50 –0.73 –1.2 V 100 µA VOH O High level output voltage High-level VOL O Low level output voltage Low-level VIK Input clamp voltage VCC = MIN, II = IIK II Input current at maximum input voltage VCC = MAX, VI = 7.0V IIH High-level input current VCC = MAX, VI = 2.7V 20 µA IIL Low-level input current VCC = MAX, VI = 0.5V –0.6 mA IOS Short-circuit output current3 VCC = MAX –150 mA 24 36 mA ICC Supply current (total) 24 36 mA ICCH ICCL VCC = MAX V 3.4 V –60 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 = 25°C. 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 VCC = +5.0V ± 10% Tamb = 0°C to +70°C CL = 50pF, RL = 500Ω VCC = +5.0V Tamb = +25°C CL = 50pF, RL = 500Ω TEST CONDITION PARAMETER MIN TYP MAX MIN MAX UNIT tPLH tPHL Propagation delay An or Bn to QA=B Waveform 1, 2 3.5 3.0 8.0 8.0 9.5 9.0 3.5 2.5 11.0 10.5 ns tPLH tPHL Propagation delay IA=B to QA=B Waveform 2 3.0 3.5 5.0 6.5 6.5 7.0 3.0 3.5 7.5 8.0 ns AC WAVEFORMS For all waveforms, VM = 1.5V. An, Bn An, Bn VM VM VM VM IA=B tPHL tPLH VM QA=B tPLH VM tPHL VM QA=B VM SF00278 Waveform 1. SF00279 For Inverting Outputs Waveform 2. For Non-Inverting Outputs TEST CIRCUIT AND WAVEFORMS VCC NEGATIVE PULSE VIN tw 90% 10% D.U.T. RT CL RL AMP (V) VM VM VOUT PULSE GENERATOR 90% 10% tTHL (tf ) tTLH (tr ) tTLH (tr ) tTHL (tf ) 0V AMP (V) 90% POSITIVE PULSE VM VM 10% 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. 90% 10% tw 0V Input Pulse Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate tw tTLH tTHL 1MHz 500ns 2.5ns 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) 1990 May 15 6 SOT146-1 Philips Semiconductors Product specification 8-bit identity comparator 74F521 SO20: plastic small outline package; 20 leads; body width 7.5 mm 1990 May 15 7 SOT163-1 Philips Semiconductors Product specification 8-bit identity comparator 74F521 Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification 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. Product specification Production 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] 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. Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 print code Document order number: yyyy mmm dd 8 Date of release: 10-98 9397-750-05129