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HD74HC194
4-bit Bidirectional Universal Shift Register
Description
This bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register. It features parallel inputs, parallel outputs, right shift and left shift serial inputs, operating mode control inputs, and a direct overriding clear line. The register has four distinct modes of operation: parallel (broadside) load, shift right (in the direction Q A toware QD); shift left; inhibit clock (do nothing). Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode control inputs, S0 and S1, high. The data are loaded into their respective flip-flops and appear at the outputs after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial data for this mode is entered at the shift right data input. When S 0 is low and S1 is high, data shifts left synchronously and new data is entered at the shift left serial input. Clocking of the flip-flops is inhibited when both mode control inputs are low. The mode control inputs should be changed only when the clock input is high.
Features
* * * * * High Speed Operation: tpd (Clock to Q) = 12 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
HD74HC194
Function Table
Inputs Operating Mode Clear Parallel load Shift right Mode Clear S1 L H H H Shift left H H Hold H H H H: L: X: X H L L H H L X X S0 X H H H L L L X X X L H Clock X Serial Shift Left X X X X H L X X X Shift Right X X H L X X X X X Parallel Outputs QB L b QAn QAn QCn QCn QB0 QB0 QB0 QC L c QBn QBn QDn QDn QC0 QC0 QC0 QD L d QCn QCn H L QD0 QD0 QD0
A B C D QA XX a b XXL c d a
XX XX XX XX XX XX XX
XXH XXL X X QBn X X QBn X X QA0 X X QA0 X X QA0
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 clock. : the level of QA, QB, QC or QD respectively before the most recent transition of
2
HD74HC194
Pin Arrangement
Clear 1 Shift Right Serial-Input 2 R A B C D L CLR QA QB QC QD CK S1
16 VCC 15 QA 14 QB Parallel 13 QC Outputs 12 QD 11 Clock 10 S1 Mode Control 9 S0 (Top view)
A3 B4 Parallel Inputs C5 D6 Shift Left Serial-Input 7
S0
GND 8
Timing Diagram
Clock Mode Control Inputs S0 S1 Clear Serial Data Inputs R L A Parallel Data Inputs B C D QA QB Outputs QC QD Shift Right Clear Load Shift Left Inhibit Clear H L H L
3
HD74HC194
Logic Diagram
Serial Shift Left Serial Shift Right
D
C
B
A
S0
S1
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
Clock Clear
QD
QC
QB
QA
4
HD74HC194
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
HD74HC194
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 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 95 19 16 10 pF ns ns Clear inactive to Clock ns Any input ns Mode controls to Clock ns A, B, C or D to Clock ns Clock or Clear ns Clear to Q ns ns Clock to Q Unit ns Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- -- -- -- -- -- -- -- -- -- 80 16 14 -- -- -- -- 12 -- -- 12 -- -- 13 -- -- 6 -- 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 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 75 15 13 10 -- -- 100 20 17 125 25 21 187 37 31 0 0 0 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 7 --
150 -- 30 25 0 0 0 25 5 4 -- -- -- -- 17 -- -- -4 -- -- 1 -- -- 5 -- 5
Hold time
th
2.0 4.5 6.0
Removal time
t rem
2.0 4.5 6.0
Output rise/fall time
t TLH t THL
2.0 4.5 6.0
Input capacitance
Cin
--
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
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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