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HD74AC298/HD74ACT298
Quad 2-Input Multiplexer with Storage
Description
This device is a high-speed multiplexer with storage. It selects four 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 input (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.
Features
* Outputs Source/Sink 24 mA * HD74ACT298 has TTL-Compatible Inputs
Pin Arrangement
I1b 1 I1a 2 I0a 3 I0b 4 I1c 5 I1d 6 I0d 7 GND 8 (Top view)
16 VCC 15 Qa 14 Qb 13 Qc 12 Qd 11 CP 10 S 9 I0c
HD74AC298/HD74ACT298
Logic Symbol
I0a I1a I0b I1b I0c I1c I0d I1d S CP Qa Qb Qc Qd
Pin Names
I1a - I1d I0a - I0d S CP Qa - Qd Source 1 Data Inputs Source 0 Data Inputs Select Input Clock Pulse Input (Active Falling Edge) Outputs
Function Table
Inputs S L H X H Cp Outputs Qa a1 a2 QA0 Qb b1 b2 QB0 Qc c1 c2 QC0 Qd d1 d2 QD0
2
HD74AC298/HD74ACT298
Logic Diagram
I1a S I0a I1b I0b I1c I0c I1d I0d
CP R CP S Qa R CP S Qb R CP S Qc R CP S Qd
Qa
Qb
Qc
Qd
DC Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Maximum ICC/input (HD74ACT298) Symbol I CC I CC I CCT Max 80 8.0 1.5 Unit A A mA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C VIN = VCC - 2.1 V, VCC = 5.5 V, Ta = Worst case
AC Characteristics: HD74AC298
Ta = +25C CL = 50 pF Item Maximum count frequency Propagation delay CP to Q Propagation delay CP to Q Note: t PHL t PLH Symbol f max VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 Min 90 110 1.0 1.0 1.0 1.0 Typ -- -- 7.0 5.0 7.5 5.5 Max -- -- 10.0 7.5 10.0 7.5 Ta = -40C to +85C CL = 50 pF Min 70 100 1.0 1.0 1.0 1.0 Max -- -- 11.5 8.5 11.5 8.5 ns Unit MHz
1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V
3
HD74AC298/HD74ACT298
AC Operating Requirements: HD74AC298
Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW D or S to CP Hold time, HIGH or LOW Dn to CPn Hold time, HIGH or LOW S to CP Pulse with tw th th Symbol t su VCC (V)*1 Typ 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Note: 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V 4.5 2.5 -2.0 -1.0 -3.0 -1.5 3.0 3.0 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 5.5 4.5 0.0 0.0 0.5 0.5 5.5 4.5 7.0 5.5 0.0 0.0 0.5 0.5 7.0 5.0 ns ns ns Unit ns
AC Characteristics: HD74ACT298
Ta = +25C CL = 50 pF Item Maximum count frequency Propagation delay CP to Q Propagation delay CP to Q Note: Symbol f max t PLH t PHL VCC (V)*1 5.0 5.0 5.0 Min 70 1.0 1.0 Typ -- 6.0 6.5 Max -- 10.0 10.0 Ta = -40C to +85C CL = 50 pF Min 60 1.0 1.0 Max -- 11.0 11.0 Unit MHz ns
1. Voltage Range 5.0 is 5.0 V 0.5 V
4
HD74AC298/HD74ACT298
AC Operating Requirements: HD74ACT298
Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW Dn or S to CP Hold time, HIGH or LOW Dn to CP Hold time, HIGH or LOW S to CP Pulse with Note: Symbol t su th th tw VCC (V)*1 Typ 5.0 5.0 5.0 5.0 3.5 -5.0 -0.5 3.0 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 5.5 1.0 1.0 7.0 6.5 1.0 1.0 8.0 Unit ns ns ns ns
1. Voltage Range 5.0 is 5.0 V 0.5 V
Capacitance
Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 30 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V
5
19.20 20.00 Max 16 9 7.40 Max 6.30
Unit: mm
1 1.3
1.11 Max
8
0.51 Min
2.54 Min 5.06 Max
7.62
2.54 0.25
0.48 0.10
0.25 - 0.05 0 - 15
Hitachi Code JEDEC EIAJ Weight (reference value)
+ 0.13
DP-16 Conforms Conforms 1.07 g
Unit: mm
10.06 10.5 Max 16 9
5.5
1
*0.22 0.05 0.20 0.04
8 0.80 Max
2.20 Max
0.20 7.80 + 0.30 -
1.15 0 - 8 0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12 M
Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA -- Conforms 0.24 g
*Dimension including the plating thickness Base material dimension
0.10 0.10
0.15
Unit: mm
9.9 10.3 Max 16 9 3.95 1 1.27 0.635 Max 8
0.11 0.14 + 0.04 - 1.75 Max
*0.22 0.03 0.20 0.03
0.10 6.10 + 0.30 -
1.08 0 - 8
0.67 0.60 + 0.20 -
*0.42 0.08 0.40 0.06
0.15 0.25 M
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
FP-16DN Conforms Conforms 0.15 g
Unit: mm
5.00 5.30 Max 16 9 4.40 1
0.08 *0.22 + 0.07 -
8 0.65 1.0 6.40 0.20 0 - 8 0.50 0.10
0.20 0.06
0.13 M 0.65 Max
*0.17 0.05 0.15 0.04
1.10 Max
0.10
0.07 +0.03 -0.04
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
TTP-16DA -- -- 0.05 g
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
URL
NorthAmerica : http:semiconductor.hitachi.com/ Europe : http://www.hitachi-eu.com/hel/ecg Asia (Singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm Asia (Taiwan) : http://www.hitachi.com.tw/E/Product/SICD_Frame.htm Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm Japan : http://www.hitachi.co.jp/Sicd/indx.htm For further information write to:
Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Strae 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Tsim Sha Tsui, Kowloon, Hong Kong Tel: <852> (2) 735 9218 Fax: <852> (2) 730 0281 Telex: 40815 HITEC HX
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.

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