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HD74AC259
8-bit Addressable Latch
Description
The HD74AC259 is a high-speed 8-bit addressable latch designed for general purpose storage applications in digital systems. It is a multifunctional device capable or storing single line data in eight addressable latches, and also a 1-of-8 decoder and demultiplexer with active HIGH outputs. The device also incorporates an active LOW Common Clear for resetting all latches, as well as an active LOW Enable.
Features
* * * * * * * Serial-to-Parallel Conversion Eight Bits of Storage with Output of Each Bit Available Random (Addressable) Data Entry Active High Demultiplexing or Decoding Capability Easily Expandable Common Clear Outputs Source/Sink 24 mA
HD74AC259
Pin Arrangement
A0 1 A1 2 A2 3 Q0 4 Q1 5 Q2 6 Q3 7 GND 8 (Top view)
16 VCC 15 MR 14 E 13 D 12 Q7 11 Q6 10 Q5 9 Q4
Logic Symbol
E A0 A1 A2
D
MR Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Pin Names
A0 - A2 D E MR Q0 - Q7 Address Inputs Data Inputs Enable Input (Active LOW) Master Reset (Active LOW) Latch Outputs
2
HD74AC259
Logic Diagram
Q7
Q6
Q5
MR Q4
A2 A1
Q3
A0
Q2
Q1 D
E
Q0
3
HD74AC259
Function Table
Inputs Operating Mode Master reset Demultiplex (Active HIGH Decoder when D = H) MR E L L L L L L L L L Store (Do nothing) Addressable latch H H H H H H H H H H L X d q : : : : : H L L L L L L L L H L L L L L L L L D X d d d d d d d d X d d d d d d d d A0 X L H L H L H L H X L H L H L H L H A1 X L L H H L L H H X L L H H L L H H A2 X L L L L H H H H X L L L L H H H H Outputs Q0 L Q1 L Q2 L L Q3 L L L Q4 L L L L Q5 L L L L L Q6 L L L L L L Q7 L L L L L L L
Q=d L L L L L L L L q0
Q=d L L L L L L L q1
Q=d L L L L L L q2 q2
Q=d L L L L L q3 q3 q3
Q=d L L L L q4 q4 q4 q4
Q=d L L L q5 q5 q5 q5 q5
Q=d L L q6 q6 q6 q6 q6 q6 Q=d q7 q7 q7 q7 q7 q7 q7
Q = d q1 q0 q0 q0 q0 q0 q0 q0
Q = d q2 q1 q1 q1 q1 q1 q1
Q = d q3 q2 q2 q2 q2 q2
Q = d q4 q3 q3 q3 q3
Q = d q5 q4 q4 q4
Q = d q6 q5 q5
Q = d q7 q6 Q=d
High Voltage Level Low Voltage Level Immaterial High or Low data one setup time prior to the Low-to-High Enable transition. Lower case letters indicate the state of the referenced output established during the last cycle in which it was addressed or cleared.
DC Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Symbol I CC I CC Max 80 8.0 Unit A A Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C
4
HD74AC259
AC Characteristics: HD74AC259
Ta = +25C CL = 50 pF Item Maximum clock frequency Propagation delay MR to Q n Propagation delay Dn to Q n Propagation delay Dn to Q n Propagaion delay An to Q n Propagation delay An to Q n Propagation delay E to Q Propagation delay E to Q n Note: t PHL t PLH t PHL t PLH t PHL t PLH t PHL Symbol f max VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V Min 65 110 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ -- -- 8.5 6.5 7.0 5.5 7.0 5.5 11.5 8.0 11.5 8.0 9.0 6.5 9.0 6.5 Max -- -- 14.5 9.0 10.5 7.5 10.5 7.5 18.5 11.5 18.5 11.5 15.0 9.0 14.0 8.5 Ta = -40C to +85C CL = 50 pF Min 60 95 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max -- -- 16.5 10.5 12.0 8.5 12.0 8.5 21.5 14.0 21.0 13.5 17.0 10.5 16.0 10.0 ns ns ns ns ns ns ns Unit MHz
5
HD74AC259
AC Operating Requirements: HD74AC259
Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW D to E Hold time, HIGH or LOW D to E Setup time, HIGH or LOW An to E Hold time, HIGH or LOW An to E Pulse width tw th t su th Symbol t su VCC (V)*1 Typ 3.3 5.0 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 1.0 0.0 0.5 0.5 1.0 0.0 -3.0 -1.0 3.0 3.0 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 3.5 3.0 2.0 2.0 6.0 4.5 0.0 0.0 5.5 4.5 3.5 3.0 2.0 2.0 7.0 5.0 0.0 0.0 7.0 5.0 ns ns ns ns Unit ns
Capacitance
Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 3.5 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V
6
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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