View HD74HC298_1248327.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

HD74HC298
Quad. 2-input Multiplexers (with storage)
Description
This circuit is controlled by the signals word select and clock. When the word select input is taken low word 1 (A 1, B1, C1 and D 1) is presented to the inputs of the flip-flops, and when word select is high word 2 (A 2, B 2, C2 and D2) is presented to the inputs of the flip-flops. The selected word is clocked to the output terminals on the negative edge of the clock pulse.
Features
* * * * * High Speed Operation: tpd (Clock to Q) = 19 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max
Function Table
Inputs Word Select L H X H Clock Outputs QA a1 a2 QA0 QB b1 b2 QB0 QC c1 c2 QC0 QD d1 d2 QD0
HD74HC298
Pin Arrangement
B2 A2 A1 Data inputs B1 C2 D2 D1 GND
1 2 3 4 5 6 7 8 A2 A1 B1 C2 D2 D1 B2 QA QB QC QD CK WS
16 VCC 15 QA 14 QB Outputs 13 QC 12 QD 11 Clock 10 Word select 9 Data input C1
C1
(Top view)
2
HD74HC298
DC Characteristics
Ta = 25C Item Input voltage Symbol VIH Ta = -40 to +85C Max -- -- -- 0.5 1.35 1.8 -- -- -- -- -- 0.1 0.1 0.1 0.33 0.33 1.0 40 A A I OL = 4 mA I OL = 5.2 mA Vin = VCC or GND Vin = VCC or GND, Iout = 0 A V I OH = -4 mA I OH = -5.2 mA Vin = VIH or VIL I OL = 20 A V Vin = VIH or VIL I OH = -20 A V Unit V Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 1.5 -- 3.15 -- 4.2 -- -- -- -- -- -- -- -- -- -- 0.5 1.5 3.15 4.2 --
VIL
2.0 4.5 6.0
1.35 -- 1.8 -- 1.9 4.4 5.9 4.13 5.63 -- -- --
Output voltage
VOH
2.0 4.5 6.0 4.5 6.0
1.9 2.0 -- 4.4 4.5 -- 5.9 6.0 -- 4.18 -- 5.68 -- -- -- -- -- -- -- -- -- --
VOL
2.0 4.5 6.0 4.5 6.0
0.0 0.1 0.0 0.1 0.0 0.1 -- -- -- --
0.26 -- 0.26 -- 0.1 -- 4.0 --
Input current Quiescent supply current
Iin I CC
6.0 6.0
3
HD74HC298
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25C Item Symbol Ta = -40 to +85C Max 215 43 37 -- -- -- -- -- -- -- -- -- 95 19 16 10 pF ns ns ns ns Clock Unit ns Test Conditions Clock to Q
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- 80 16 14 -- 19 -- -- 10 -- 170 -- 34 29 -- -- -- -- -- -- -- -- -- 75 15 13 10 -- -- 100 20 17 190 38 33 5 5 5 -- -- -- --
Propagation delay t PLH time t PHL
Pulse width
tw
2.0 4.5 6.0
Setup time
t su
2.0 4.5 6.0
150 -- 30 26 5 5 5 -- -- -- -- 16 -- -- -5 -- -- 5 -- 5
Hold time
th
2.0 4.5 6.0
Output rise/fall time
t TLH t THL
2.0 4.5 6.0
Input capacitance
Cin
--
4
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
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.

▲Up To Search▲

Price & Availability of HD74HC298

	To Download HD74HC298 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .