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HD74HC195
4-bit Parallel-Access Shift Register
Description
This shift register features parallel inputs, parallel outputs, J-K serial inputs, Shift/Load control input, and a direct overriding clear. This shift register can operate in two modes: Parallel load; shift from QA towards QD. Paralle loading is accomplished by applying the four bits of data, and taking the Shift/Load control Input low. The data is loaded into the associated flip-flops and appears at the outputs after the positive transition of the clock input. During parallel loading, serial data flow is inhibited. Serial shifting occurs synchronously when the Shift/Load control input is high. Serial data for this mode is entered at the J-K inputs. These inputs allow the first stage to perform as a J-K or toggle flip-flop as shown in the function table.
Features
* * * * * High Speed Operation: tpd (Clock to Q) = 13 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)
HD74HC195
Function Table
Inputs Shift/ Serial K X X X H L H L Parallel A X a X X X X X B X b X X X X X C X c X X X X X D X d X X X X X Outputs QA L a QA0 QA0 L H QAn QB L b QB0 QA0 QAn QAn QAn QC L c QC0 QBn QBn QBn QBn QD L d QD0 QCn QCn QCn QCn QD H d QD0 QCn QCn QCn QCn
Clear Load Clock J L H H H H H H H: L: X: X L H H H H H L X X X X L L H H
high level (steady state) low level (steady state) don't care : transition from low to high level.
a, b, c, d : the level of steady-state input at inputs A, B, C or D respectively. QA0, QB0, QC0, QD0 : the level of QA, QB, QC or QD respectively, before the indicated steady-state input conditions were established. QAn, QBn, QCn, QDn : the level of QA, QB, QC or QD respectively before the most recent the clock. transition of
2
HD74HC195
Pin Arrangement
Clear 1 J2 Serial Inputs K3 A4 B5 Parallel Inputs C6 D7 GND 8 (Top view) J K A B C Clear QA QB QC QD QD
16 VCC 15 QA 14 QB 13 QC 12 QD 11 QD 10 Clock 9 Shift/Load Outputs
D CK Shift/Load
Timing Diagram
Clock Clear Serial Inputs Shift/Load J K A B C D QA QB QC QD Serial Shift Clear Load H L H L
Parallel Data Inputs
Outputs
Serial Shift
3
HD74HC195
Logic Diagram
K VCC J
D
C
B
A VCC
Shift/ Load
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
Clock Clear
QD
QD
QC
QB
QA
4
HD74HC195
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
5
HD74HC195
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25C Item Maximum clock frequency Symbol f max Ta = -40 to +85C Max 5 24 28 175 35 30 175 35 30 190 38 33 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ns Clear inactive to Clock ns Shift/Load to Clock ns Any input except Shift/Load ns Shift/Load to Clock ns A, B, C, D, J, K to Clock ns Clock to Clear ns Clear to Q ns ns Clock to Q Unit MHZ Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- -- -- -- -- -- -- -- -- -- 80 16 14 -- -- -- -- 13 -- -- 13 -- -- 15 -- -- 7 -- 6 30 35 -- -- --
Propagation delay t PHL time
2.0 4.5 6.0
140 -- 28 24 -- --
t PLH
2.0 4.5 6.0
140 -- 28 24 -- --
t PHL
2.0 4.5 6.0
150 -- 30 26 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 100 20 17 125 25 21 125 25 21 0 0 0 95 19 16 31 6 5
Pulse width
tw
2.0 4.5 6.0
Setup time
t su
2.0 4.5 6.0 2.0 4.5 6.0
100 -- 20 17 6 --
100 -- 20 17 0 0 0 75 15 13 25 5 4 13 -- -- -3 -- -- 8 -- -- 0 --
Hold time
th
2.0 4.5 6.0
Removal time
t rem
2.0 4.5 6.0 2.0 4.5 6.0
6
HD74HC195
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont)
Ta = 25C Item Output rise/fall time Symbol t TLH t THL Ta = -40 to +85C Max 95 19 16 10 pF Unit ns Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- -- -- 5 -- 5 75 15 13 10 -- -- -- --
Input capacitance
Cin
--
7
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
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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