View HD74HC85_82101.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

HD74HC85
4-Bit Magnitude Comparator
Description
The HD74HC85 id designed for high speed comparison of two four bit words. This circuit has eight comparison input, 4 for each word; three cascade inputs (A < B, A > B, A = B); and three decision outputs (A < B, A > B, A = B). The result of a comparison is indicated by a high level on one of the decision outputs. thus it may be determined whether one word is "greater than," "less than," or "equal to" the other word. by connecting the outputs of the least significant stage to the cascade inputs of the enxt stage, words of greater than four bits can be compared. In addition the least significant stage must have a high level applied to the A = B input, and a low level to the A < B, and A > B inputs.
Features
* * * * * High Speed Operation: tpd (Data Word Input to Output) = 20 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 (Ta = 25C)
HD74HC85
Function Table
Data Word Inputs A3, B3 A2, B2 A1, B1 X X X X A1 > B1 A1 < B1 A1 = B1 A1 = B1 A1 = B1 A1 = B1 A1 = B1 A1 = B1 A1 = B1 A0, B0 X X X X X X A0 > B0 A0 < B0 A0 = B0 A0 = B0 A0 = B0 A0 = B0 A0 = B0 Cascading Inputs A > Bin X X X X X X X X L L H H X A = Bin X X X X X X X X L L L L H A < Bin X X X X X X X X L H L H X Outputs A > Bout A = Bout A < Bout H L H L H L H L H L H L L L L L L L L L L L L L L H L H L H L H L H H H L L L
A3 > B3 X A3 < B3 X A3 = B3 A2 > B2 A3 = B3 A2 < B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2 A3 = B3 A2 = B2
Pin Arrangement
B3 Data 1 Input AB 4 A>B 5 A=B 6 A16 VCC 15 A3 14 B2 13 A2 12 A1 11 B1 10 A0 9 B0
A=B In B2 A>B A>B A2 A1
A=B out B1 A2
HD74HC85
Logic Diagram
B3 A3 A>Bout B2 A2
B1 A1 AABin A=Bout
3
HD74HC85
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
4
HD74HC85
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25C Item Symbol Ta = -40 to +85C Max 265 53 45 220 44 37 155 31 26 195 39 33 95 19 16 10 pF ns ns Cascading input to output (Except A = Bout) ns A = Bin to A = Bout ns Data word input to A = Bout Unit ns Test Conditions Data word input to output (Except A = Bout)
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20 -- -- 20 -- -- 12 -- -- 14 -- -- 5 -- 5 210 -- 42 36 -- --
Propagation delay t PLH time t PHL
t PLH t PHL
2.0 4.5 6.0
175 -- 35 30 -- --
t PLH t PHL
2.0 4.5 6.0
125 -- 25 21 -- --
t PLH t PHL
2.0 4.5 6.0
155 -- 31 26 75 15 13 10 -- -- -- -- -- --
Output rise/fall time
t TLH t THL
2.0 4.5 6.0
Input capacitance
Cin
--
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
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 HD74HC85

	To Download HD74HC85 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .