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INTEGRATED CIRCUITS
74F298 Quad 2-input multiplexer with storage
Product specification IC15 Data Handbook 1989 Aug 14
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
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)
PIN CONFIGURATION
I1b I1a I0a I0b I1c 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC Qa Qb Qc Qd CP S I0c
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. TYPE 74F298
I1d I0d GND
SF00859
TYPICAL fMAX 115MHz
TYPICAL SUPPLY CURRENT (TOTAL) 30mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F298N N74F298D PKG DWG #
16-pin plastic DIP 16-pin plastic SO
SOT38-4 SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS I0a, I0b, I0c, I0d I1a, I1b, I1c, I1d S CP Qa, Qb, Qc, Qd DESCRIPTION Data inputs Data inputs Select input Clock input (active falling edge) Data outputs 74F (U.L.) HIGH/LOW 1.0/1.0 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 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
3 2 4 1 9 5 7 6
LOGIC SYMBOL (IEEE/IEC)
11 10 C1 M2
3 I0a I1a I0b 10 11 S CP Qa Qb Qc Qd I1b I0c I1c I0d I1d 2 4 1 9
2, 1D 2, 1D
15
14
13 5 7 12
VCC = Pin 16 GND = Pin 8
15
14
13
12
6
SF00860
SF00861
1989 Aug 14
2
853-0061 97377
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
LOGIC DIAGRAM
I1a 2 S 10 I0a 3 I1b 1 I0b 4 I1c 5 I0c 9 I1d 6 I0d 7
CP
11
R CP S Qa 15 Qa
R CP S Qb 14 Qb
R CP S Qc 13 Qc
R CP S Qd 12 Qd
VCC = Pin 16 GND = Pin 8
SF00862
FUNCTION TABLE
INPUTS CP H h L l X = = = = = = S l l h h I0n l h X X I1n X X l h OUTPUT Qn L H L H Load source "1" Load source "0" OPERATING MODE
High voltage level High voltage level one setup time prior to the High-to-Low clock transition Low voltage level Low voltage level one setup time prior to the High-to-Low clock transition 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 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
1989 Aug 14
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
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.) LIMITS SYMBOL PARAMETER TEST CONDITIONSNO TAG MIN VCC = MIN, VIL = MAX, , , VIH = MIN, IOH = -MAX 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 30 32 TYP
NO TAG
UNIT MAX V
VO OH
High-level High level output voltage
10%VCC 5%VCC 10%VCC 5%VCC
2.5 2.7 3.4 0.30 0.30 -0.73 0.50 0.50 -1.2 100 20 -0.6 -150 40 40
V V V V A A mA mA mA mA
VO OL VIK II IIH IIL IOS ICC
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 currentNO TAG ICCH ICCL
Supply current (total)
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.
AC ELECTRICAL CHARACTERISTICS
LIMITS TEST CONDITION MIN fMAX tPLH tPHL Maximum clock frequency Propagation delay CP tp Qn Waveform NO TAG Waveform NO TAG 110 4.0 4.5 Tamb = +25C VCC = +5.0V CL = 50pF RL = 500 TYP 115 5.5 6.5 7.5 8.5 MAX Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF RL = 500 MIN 105 4.0 4.5 9.0 9.5 MAX ns ns
SYMBOL
PARAMETER
UNIT
1989 Aug 14
4
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
AC SETUP REQUIREMENTS
LIMITS TEST CONDITION MIN 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 Waveform NO TAG Waveform NO TAG Waveform NO TAG Waveform NO TAG Waveform NO TAG 2.0 2.0 1.0 1.0 6.0 5.0 0 0 5.0 5.0 Tamb = +25C VCC = +5.0V CL = 50pF RL = 500 TYP MAX Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF RL = 500 MIN 2.0 2.0 1.0 1.0 7.0 6.0 0 0 5.0 7.0 MAX ns ns ns ns ns
SYMBOL
PARAMETER
UNIT
AC WAVEFORMS
For all waveforms, VM = 1.5V. The shaded areas indicate when the input is permitted to change for predictable output performance.
1/fMAX Ion, I1n, S VM CP VM tW(L) tPLH Qn VM tW(H) tPHL VM CP VM VM VM ts(H) VM th(H) ts(L) VM VM th(L)
SF00863
SF00864
Waveform 1. Clock Input to Output, Clock Pulse Width, and Maximum Clock Frequency
Waveform 2. Data Setup and Hold Times
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
1989 Aug 14
5
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1989 Aug 14
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1989 Aug 14
7
Philips Semiconductors
Product specification
Quad 2-input multiplexer with storage
74F298
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 9397-750-05116
Philips Semiconductors
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